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Thursday, July 6, 2023

Protests and uprisings in Tibet since 1950


Protests and uprisings in Tibet against the government of the People's Republic of China have occurred since 1950, and include the 1959 uprising, the 2008 uprising, and the subsequent self-immolation protests.

2013 screen shot of Ratuk Ngawang in Special Frontier Force uniform from video of Voice of America's Kunleng Tibetan program interview about Chushi Gangdruk or Four Rivers, Six Ranges Tibetan resistance force and its role in the safe passage of the 14th Dalai Lama to India.

Over the years the Tibetan government in exile, the Central Tibetan Administration (CTA), has shifted the goal of its resistance stance from attempting measured cooperation with autonomy, to demanding full independence, to seeking "genuine autonomy for all Tibetans living in the three traditional provinces of Tibet within the framework of the People's Republic of China". However, not all exiled Tibetans are content with pursuing the current CTA policy of the Middle Way Approach and many expressed their frustration in 2008, against the Dalai Lama's wishes, by agitating for independence.

With the 14th Dalai Lama announcing his retirement from political life just before the April 2011 elections for Sikyong (Prime Minister) who will henceforth be Tibet's political leader, the nature of resistance may be moving into yet another phase, although the three leading candidates currently favor the Middle Way Approach.

Background

Isolated geography has naturally defined Tibet as a unique entity, however, its governance and political status have been in flux for centuries. The minor kingdoms and tribal states of the region were first united under Songtsen Gampo to form the Tibetan Empire in the seventh century CE. Under the influence of his Chinese bride and first Nepali wife Bhrikuti, the Emperor converted to Buddhism and established it as the religion of Tibet. An influx of Chinese culture, the Indian alphabet, and Buddhist monks followed, combining with the native customs and animistic religion Bön to give birth to what has become today's ethnic Tibetan people and Tibetan Buddhism, also known as Lamaism.

Thubten Gyatso, the 13th Dalai Lama photographed in Calcutta in 1910 who declared Independence of Tibet in 1913 by written proclamation

After the break-up of the Tibetan Empire in the mid-9th century, central rule was largely nonexistent over the region for 400 years. But Buddhism survived and when the Mongols conquered the region, Buddhism was adopted as the official religion of their empire. In 1271, Kublai Khan established the Yuan Dynasty and Tibet remained a semi-autonomous entity within it. From the second half of the 14th century until the early 17th, Tibet was ruled by competing Buddhist schools. However, it was during this period that the Gelug order was founded in 1409 and the institution of the Dalai Lama was established in 1569 with the priest-patron relationship between the Altan Khan and the 3rd Dalai Lama (the first two were bestowed the title retroactively). The Dalai Lamas are said to be the reincarnates of the Bodhisattva of Compassion, Avalokiteśvara.

It was when the 5th Dalai Lama Ngawang Lobsang Gyatso succeeded in establishing the Ganden Phodrang government and Gelug supremacy in Tibet, with the help of the Güshi Khan of the Khoshut Khanate, that the post took on the dual role of political and religious leadership (however, the 9th–12th Dalai Lamas died before adulthood). After Lobsang Gyatso's mortal passing in 1682, which was kept a secret for 15 years, there was a period of anarchy and invasions that eventually led to the establishment of Qing protectorate over Tibet in 1720 that would reach its peak in the 1790s in response to attacks by Nepal, be renewed in 1903 when the British invaded, and would last until 1912. Tibet became independent with the demise of the Manchu Qing dynasty and would remain so until 1950.

Early resistance 1950-1958

In his essay Hidden Tibet: History of Independence and Occupation published by the Library of Tibetan Works and Archives at Dharamsala, S.L. Kuzmin, quoting the memoirs of Soviet diplomat A. M. Ledovsky, claims that on January 22, 1950, during his negotiations with Joseph Stalin in Moscow, Mao Zedong asked him to provide an aviation regiment because he was preparing to advance towards Tibet. Stalin approved these preparations and provided military support with Soviet pilots and airfield personnel dressed in Chinese clothes, because this aid was illegal. In 1950, the People's Liberation Army of the People's Republic of China (PRC) entered Tibet and the US government made contact with the Dalai Lama's brother Gyalo Thondup, who was living in India, to offer US help, which was rejected. In May 1951, a delegation representing the 14th Dalai Lama, 15 years old at the time, and led by Ngapoi Ngawang Jigmei, traveled to Beijing to be presented with the Seventeen Point Agreement for the Peaceful Liberation of Tibet, which established a PRC sovereignty over Tibet: assuming responsibility for Tibet's external affairs while leaving the domestic governance to the Lhasa government and assuring religious freedoms. The treaty was signed by the Lhasa delegation and the 10th Panchen Lama, who had already switched his loyalty to the PRC after flirting with the Kuomintang and conspiring against the central Tibetan government, which still refused to recognize him as the true Panchen Llama. Later there would be much controversy over the validity of the agreement stemming from claims it was signed under threat of arms and disagreements about whether the delegates had the authority to sign.

But at the time, in Lhasa, the Kutra aristocrats mingled with Chinese officials and prospered from this association. Mixed parties were thrown throughout the year and even by the Dalai Lama himself. The burden on farmers and peasants of supplying the troops with food led to shortages and rising prices, coupled with influenza and smallpox outbreaks, weighted heavy on the majority of Tibetans, who were only marginally surviving before. Protests called "people's assemblies" began in Lhasa, where organizers sent letters of grievances to the government and posted anti-Chinese slogans in public places. The leaders were promptly arrested and the protests stifled.

In early 1952, Thondup returned to Lhasa with an economic reform plan that would include lowering taxes and land reform. With the Dalai Lama in agreement, Thondup went about implementing the reforms only to meet with strong resistance from the wealthy old guard who labeled him a radical communist. The label sparked the interests of the Chinese who invited him to Beijing to study, but instead he fled back to India, where he began working with the CIA to form and train a Tibetan insurgency. Again the US tried to convince the Dalai Lama to do the same with an offer of "full aid and assistance", but he refused.

The Dalai Lama saw the need to modernize Tibet and was open to Marxism.

It was only when I went to China in 1954–55 that I actually studied Marxist ideology and learned the history of the Chinese revolution. Once I understood Marxism, my attitude changed completely. I was so attracted to Marxism, I even expressed my wish to become a Communist Party member. Tibet at the time was very, very backward [...] Marxism talked about self-reliance, without depending on a creator or a God. That was very attractive. [...] I still think that if a genuine communist movement had come to Tibet, there would have been much benefit to the people. Instead the Chinese communists brought Tibet so-called liberation.[...] They started destroying monasteries and killing and arresting lamas.

— 14th Dalai Lama

On the Tibetan leader's journey home from his year in China, Khampa and Amdowa clan leaders informed his chief of staff of their plans to rebel against the Chinese in retribution for land confiscation and attacks on monasteries. But all was relatively quiet in Lhasa and in April 1956 he received a Chinese delegation to inaugurate the Preparatory Committee for the Autonomous Region of Tibet: a 51-man committee composed mostly of Tibetans. Meanwhile, open rebellion began with the massacre of a Communist garrison in Kham which left an estimated 800 Chinese dead, sparking air strikes that killed more Tibetans. In addition, the CIA met with the Dalai Lama's two brothers Thubten Jigme Norbu and Gyalo Thondup in India and offered to train a pilot group of six Khampas in guerrilla warfare and radio communications in Saipan. They were smuggled out of Tibet and would later be parachuted back in to train others and to report back to the CIA on the insurgency's progress and needs.

According to the Dalai Lama, his visit to India in November 1956, during which he met with Tibetan "freedom fighters" which included two of his elder brothers, "spoiled good relations with China." The exiles encouraged him to stay and join their fight for independence but Indian Prime Minister Jawaharlal Nehru warned him that India could not offer support. Chinese Premier Zhou Enlai, who was also in Delhi, assured him of Mao's decision to postpone for six years further reforms in Tibet. Both Nehru and Enlai counseled the Lama to return to Lhasa.

Chushi Gangdruk flag
 
Andrug Gompo Tashi commonly known as "Gonpo Tashi" Andrugtsang before 1959

Although the Chinese let up on reforms, they continued military operations in the areas in rebellion, causing thousands of refugees to gather around Lhasa. In July 1957, the Dalai Lama hosted a large ceremony in the Potala Palace, during which he accepted a golden throne and petition from representatives of the Chushi Gangdruk Tibetan resistance movement, and in return gave them a blessing touch on their foreheads, and issued them with a talisman. They would soon become a 5,000-man strong "Defenders of the Faith Volunteer Army" under the leadership of Gompo Tashi Andrugtsang that would struggle against the Chinese for years. However, in September 1957 when the first two CIA trainees dropped into Tibet to deliver a message from the CIA offering support to the Tibetan leader, it was refused. The second drop of four men was disastrous: only one managed to escape alive. Meanwhile, by 1958 Gompo's army was doing quite well taking control of large portions of central Tibet.

1959 Tibetan uprising

"By sunset on March 9 [1959] thousands of men, women, children started to gather outside the walls of the Summer Palace." On March 10, 1959, the crowd surrounded the summer palace in response to fear that the Communist Chinese People's Liberation Army (PLA) were planning to arrest the Dalai Lama at "a theatrical performance at the Chinese military camp at Silling-Bhuk." The people were determined not to allow the Dalai Lama to leave Norbulingka palace. Some members of the crowd directed aggression at Tibetan officials that were thought to be Chinese collaborators. Tenpa Soepa, who was staying at a house on the night of March 10 near Norbulingka said, "When I arrived at the gate I found Kalon Sampho lying on the ground unconscious." Sampho, "...had arrived at Norbulinka [sic] in a car with his Chinese bodyguard. They got out of their car and when the crowd saw the Chinese guard they began throwing stones." "Phakpalha Khenchung ...had been killed by the protestors. He was a government official, and it was rumored that he had a very close relationship with the Chinese." PLA General Tan Kuan-sen considered the Dalai Lama to be in danger and offered him refuge if he could make it to the Chinese camp. He declined the offer. A week into the fighting, the general ordered two mortar rounds shot toward the palace. At that point, the Dalai Lama decided the time had come to slip out over the mountains, with a very small party, arriving a few days later at the Indian border. He was granted asylum by the Nehru government with the stipulation that he would not engage in politics on Indian soil. Meanwhile, Enlai dissolved the Tibetan government and appointed the Preparatory Committee for the Founding of the Tibet Autonomous Region to take its place. In 1959, Tenpa Soepa and other prisoners of war near Toema in Amdo said, "Along the road we could see why our guards were so jumpy. We saw many burnt-out guardposts and even some tanks that were destroyed by Tibetan guerillas. This was Amdo, where the guerrilla war had gone on for years."

Once in exile, the Dalai Lama's discourse changed from cooperative autonomy to independence. He cited the 17-Point Agreement as proof of Tibet's claim to sovereignty, while at the same time he declared it void because the Chinese had violated it and because, he claimed, it had been signed under duress. He also made clear that he was in favor of economic, social and political reforms, but that the Chinese had not acted in good faith. He closed his first press conference in India in April 1959 by subtly establishing the government-in-exile by declaring, "wherever I am accompanied by my Government, the Tibetan people will recognize such as the Government of Tibet." The UN General Assembly responded by passing three resolutions in the first half of the decade calling for "respect for the fundamental human rights of the Tibetan people and for their distinctive cultural and religious life" and recognising the right of the Tibetan people to self-determination. The US responded differently.

Each year of the 1960s, the CIA provided the Tibetan government-in-exile with $1.7 million for guerrilla operations and $180,000 for cultural centers and international lobbying.

As he was announcing his whereabouts, the Khampa rebels were met by massive Chinese forces and were nearly obliterated. While they spent several months regrouping, the US failed to form a coalition of nations willing to recognize the Tibetan government-in-exile or even to find countries who would host the Dalai Lama on a tour to explain his cause.

Tibetan resistance 1958-1973

Already in July 1958, air drops of arms to the Chushi Gangdruk Tibetan resistance movement had begun, the CIA had relocated Tibetan guerrilla trainees to Camp Hale in Colorado, USA (where a Tibetan community still resides today) and parachute dispatch officers had been recruited from among the Montana US Forest Service smoke jumpers (who became known as the "Missoula Mafia"). But according to Thundrop, the Dalai Lama did not know about CIA involvement until he reached India.

In autumn, the CIA parachuted four groups of Camp Hale trainees inside Tibet. The first was met by Chinese and the men fled for their lives. Two groups arrived safely and even facilitated successful arms drops, but the Chinese caught on and within a month all but a few of the team members and thousands of Khampa families were massacred. The CIA guerrilla training failed to take into account that the Khampa warriors travelled with family and livestock in tow. The fourth group had about the same luck. They arrived, received arms drops, were joined by two more teams, but in February 1960 the Chinese killed them along with another 4,000 rebel fighters and their parties. One last group was dropped in 1961, but all but one were killed only three months after landing. The survivor was captured and as he says, tortured, until he told the entire story of Colorado. He was released from prison in 1979.

At the proposal of Thundop and Gompo Tashi in early 1960, a Tibetan guerrilla base was established in Mustang, Nepal, where some 2,000 mostly ethnic Khampa amassed in such a disorderly fashion that the first year was a challenge for survival given that the US could not get food supplies to them due to a suspension of overflights stemming from the U-2 incident. By spring 1961, Mustang guerrilla units had begun raids along a 250-mile stretch inside Tibet. In addition, some 12,000 Tibetans eventually joined the Special Frontier Force that manned the Sino-Indian border. But as the years passed without any bases established inside Tibet, US enthusiasm over the Mustang fighters dwindled and already sparse and insufficient arms drops ceased in 1965, leaving an aging and barely armed guerrilla force in dire straits. The 25 small teams of Colorado-trained Tibetans who were sent into Tibet from 1964 to 1967 on fact-finding missions had no better luck. Only two were able to operate in-country for more than two months, finding no support from compatriots.

Meanwhile, the CIA provided the government-in-exile money to open offices in Geneva and New York, to arrange for resettlement of Tibetan orphans in Switzerland, and to educate a few dozen Tibetans at Cornell University.

By the time Nixon came to the White House, the CIA had already informed Thundrop that they were terminating support. (296) Years later, he would have this to say about the affair:

America didn't want to help Tibet. It just wanted to make trouble for China. It had no far-sighted policy for Tibet[...]The Americans promised to help make Tibet an independent country. All those promises were broken...I can't say the CIA help was useful...it really provoked the Chinese [and] led to reprisals. I feel very sorry for this.

According to author and scholar Carole McGranahan of the University of Colorado, today the history of the Tibetan resistance is purposefully down-played, uncelebrated, and even ignored by the Tibetan government in exile as it does not fit well into the global image it wishes to project and the current official position of seeking a peaceful coexistence with China.

Middle Way Approach 1973

According to the office of the Dalai Lama the essence of the Middle Way Approach seeks coexistence based on equality and mutual co-operation. It is a:

non-partisan and moderate position that safeguards the vital interests of all concerned parties- for Tibetans: the protection and preservation of their culture, religion and national identity; for the Chinese: the security and territorial integrity of the motherland; and for neighbours and other third parties: peaceful borders and international relations.

The seeds of the Middle Way Approach were sown in the early 1970s in a series of internal government and external consultations. The Dalai Lama was encouraged in 1979 when Deng Xiaoping told his brother Gyalo Thondup that "except independence, all other issues can be resolved through negotiations". The Dalai Lama agreed to pursue negotiations for a mutually beneficial and peaceful resolution rather than fighting to restore independence. He sent three fact finding missions into Tibet and wrote Deng Xiaoping a long personal letter before his representatives traveled to Beijing in 1982 to open negotiations. However, they reported that their Chinese counterparts were not interested in discussing the situation in Tibet, only the personal status and future of the 14th Dalai Lama. Nevertheless, during the 1980s, the Dalai Lama would send 6 delegations to China. In 1987, before the U.S. Congressional Human Rights Caucus the Dalai Lama unveiled the Five Point Peace Plan as a "first step towards a lasting solution".

"WORLD PEACE MUST DEVELOP FROM INNER PEACE. PEACE IS NOT THE ABSENCE OF VIOLENCE. PEACE IS THE MANIFESTATION OF HUMAN COMPASSION."
Congressional Gold Medal awarded to "Tenzin Gyatso the 14th Dalai Lama of Tibet". The back side quotes him, "World Peace Must Develop From Inner Peace. Peace Is Not The Absence Of Violence. Peace Is The Manifestation Of Human Compassion."
  1. Transformation of the whole of Tibet into a zone of peace;
  2. Abandonment of China's population transfer policy which threatens the very existence of the Tibetans as a people;
  3. Respect for the Tibetan people's fundamental human rights and democratic freedoms;
  4. Restoration and protection of Tibet's natural environment and the abandonment of China's use of Tibet for the production of nuclear weapons and dumping of nuclear waste;
  5. Commencement of earnest negotiations on the future status of Tibet and of relations between the Tibetan and Chinese peoples.

The next year, the Dalai Lama addressed the European Parliament and offered what was later called the Strasbourg Proposal 1988, which elaborated on the Middle Way Approach and a vision of reconciliation, resembling what some historians say was a suzerainty relationship between China and Tibet. The proposal basically calls for the establishment of a democratic Tibet with complete sovereignty over its domestic affairs and non-political foreign affairs, with China retaining its responsibility for Tibet's foreign policy and maintaining its military presence temporarily.

The periodic meetings between the Central Tibetan Administration's envoys and the Chinese government were, Tundrop felt, "like one hand clapping" and so the CTA suspended them in 1994. They resumed at the pace of one per year between 2002 and 2008. In 2008, at the 8th round of talks, CTA envoys presented a document called Memorandum on Genuine Autonomy for the Tibetan People and a Note in response to Chinese government's statement asking what degree of autonomy is being sought by Tibetans. The Memorandum states that "in order for the Tibetan nationality to develop and flourish with its distinct identity, culture and spiritual tradition through the exercise of self-government on the above mentioned 11 basic Tibetan needs, the entire community, comprising all the areas currently designated by the PRC as Tibetan autonomous areas, should be under a single administrative entity. It further mentions that "bringing all the Tibetans currently living in designated Tibetan autonomous areas within a single autonomous administrative unit is entirely in accordance with the constitutional (Chinese) principle contained in Article 4, also reflected in the Law on Regional National Autonomy LRNA (Article 2), that "regional autonomy is practiced in areas where people of minority nationalities live in concentrated communities."

According to Central Tibetan Administration, the Middle Way Approach enjoys widespread support from the international community. In 2008, a group of 29 Chinese dissidents urged Beijing to open direct dialogue with Tibet's exiled spiritual leader, the Dalai Lama. In June 2012, the European parliament in Strasbourg passed a resolution commending the new CTA leadership for its commitment to resolve the issue of Tibet through Middle Way Approach. US President Barack Obama after meeting with Dalai lama on 21 February 2014, issued a statement applauding the Dalai Lama's commitment to non-violence and dialogue with China and his pursuit of Middle Way Approach.

On 5 June 2014, Central Tibetan Administration launched an international awareness campaign on the Middle Way Approach. According to CTA, the campaign was to counter Chinese government's deliberate attempts to spread misinformation on the Middle Way Approach. During the campaign, CTA created a series of documents, website, documentary film and social media handles.

More recently in 2018, a delegation of the European Parliament expressed support for the Middle Way Approach. In 2019, a Senator of the Canadian Parliament and the U.S. Department of State's Report on International Religious Freedom  issued calls of support for the Middle Way Approach as a sustainable solution for resolving the ongoing religious and human rights violations in Tibet.

Criticism

The Middle Way Approach was criticized in 2014 by American historian Elliot Sperling as a part of a "self-delusion" based on a hope that the approach was for and would gain independence.

Uprisings and protests 1987-1989

A series of pro-independence protests that took place between September 1987 and March 1989 in the Tibetan areas in the People's Republic of China: Sichuan, Tibet Autonomous Region and Qinghai, and the Tibetan prefectures in Yunnan and Gansu. The largest demonstrations began on March 5, 1989 in the Tibetan capital of Lhasa, when a group of monks, nuns, and laypeople took to the streets as the 30th anniversary of the 1959 Tibetan uprising approached. Police and security officers attempted to put down the protests, but as tensions escalated an even greater crowd of protesters amassed. After three days of violence, martial law was declared on March 8, 1989, and foreign journalists and tourists were expelled from Tibet on March 10. Reports of deaths and military force being used against protesters were prominent. Numbers of the dead are unknown.

2008 protests and uprisings

Sporadic and isolated outbursts by Tibetans against the Chinese continued especially during the unrest between September 1987 until March 1989 in the Tibetan areas of the PRC. But it wasn't until 2008 that a large-scale and coordinated uprising erupted coinciding with international protests accompanying the Olympics torch relay that would end in Beijing where the 2008 Summer Olympics were held.

During the annual observance of both the 1959 Tibetan Uprising Day and the escape of the 14th Dalai Lama to India, monks from two different monasteries began marches into Lhasa on 10 March. Peaceful street protests and demonstrations grew, and were met by excessive force from Chinese police and military units on 14 March. Crowd control, shootings, beatings and arrests escalated the tensions, eventually setting off clashes between thousands of Tibetans in the Ramoche section of Lhasa and Chinese security forces. The clashes spread to include arson. Reports indicate more than 1200 Chinese shops, offices, and residences were burned, and fire was set to nearly 100 cars, including police vehicles. Monks were arrested at monasteries, and the number of Tibetans killed varies between 140 and 219 deaths. Other Tibetans were arrested, and Amnesty International reports 1000 Tibetans remained "unaccounted for" by June. The paramilitary People's Armed Police were sent in and 50-100 Tibetans were killed. The international community condemned the suppression of the protests, which spread through the Tibetan plateau. Other reports on the clashes estimate among Han settlers, 22 were dead and 325 injured. Damage was estimated at $40 million USD. In the Gansu Province, another demonstration by 400 monks was met with Chinese security forces, igniting a clash by more than 5000 Tibetans who again burned down the establishments of local Han and Hui settlers before the forces arrived.

Pro-Tibetan protesters at Olympic Torch Relay London 2008
 
Pro-Chinese demonstration at Olympic Torch Relay in Calgary 2008

The Tibetan chairman of the TAR government Jampa Phuntsok, who was in Beijing at the time, told the foreign press that security personnel in Lhasa had shown great restraint and did not use lethal force. However, it was the chairman of the Chinese Communist Party who was dispatched to Tibet to deal with the situation and the Tibetan officials remained in other provinces. Eventually 90 locations erupted in protests. Their common slogans and Tibetan flags indicated desires for independence or autonomy.

Simultaneously, in India a coalition of Tibetan exile organizations- Tibetan Youth Congress (YTC), Tibetan Women's Association, Tibetan political prisoners' movement, Students for a Free Tibet and National Democratic Party of Tibet- calling itself the Tibetan People's Uprising Movement (TPUM) struck out on a "Return March to Tibet" on March 10. Carrying Tibetan flags and calling for independence, they planned to reach Tibet on foot just in time for the opening of the Olympic Games. Both India and Nepal reminded the Dalai Lama that the Tibetans' welcome in the area was predicated on the agreement of no anti-China political maneuvers from their territories. The Dharamsala government met with the marchers. When it was clear that the marchers would continue their trek, they were arrested by state authorities in the northern Indian state of Uttarakhand on March 28.

Unnecessary adjective.
Tibetans protest in Pokhara, Nepal 2008

On March 24, 2008 the Olympic Torch Relay began its 137,000 km route. Tibetan exiles and supporters in Paris, London, San Francisco, New Delhi, Islamabad, and Jakarta, Seoul, etc. used the event to stage protests. In some places they were met by local Chinese and other counter-protesters. The fiasco caused the International Olympic Committee to ban international Torch Relay in the future. The Chinese government blamed the "Dalai clique" for the uprising, the march and the Olympic protests and called TYC a terrorist organization prepared to initiate guerrilla warfare once across the border. The PRC published articles denouncing the various historical plots and activities of the Tibetan exiles as well as US funding to Tibetan activists through the National Endowment for Democracy.

The Dalai Lama denied that his government had anything to do with the Olympic protests and said that he did not advocate a boycott of the games. He called on demonstrators to refrain from any violence, and gave interviews clarifying that his goals were not currently to seek independence from China. The Dalai Lama threatened to resign over TPUM disobedience to the official policy of non-violence and genuine Tibetan autonomy. In the end, international pressure finally led PRC representatives to renew unofficial talks with their Dharamsala counterparts.

Self-immolations 2009-Present

As of July 2020, 156 monks, nuns, and ordinary people self-immolated in Tibet since 27 February 2009 when Tapey, a young monk from Kirti Monastery set himself on fire in the marketplace in Ngawa City, Ngawa County, Sichuan. Some of the protesters who set themselves on fire were teenagers. Most such incidents have taken place in Sichuan province, especially around the Kirti Monastery in Ngawa City, Ngawa County, Sichuan, others in Gansu and Qinghai provinces and Tibet Autonomous Region. Self-immolation protests by Tibetans also occurred in India and Kathmandu, Nepal. In 2011 a wave of self-immolations by Tibetans in China, India and Nepal occurred after the Phuntsog self-immolation incident of March 16, 2011 in Ngawa County, Sichuan. The Dalai Lama has said he does not encourage the protests, but he has praised the courage of those who engage in self-immolation and blamed the self-immolations on "cultural genocide" by the Chinese. Premier Wen Jiabao said that such extreme actions hurt social harmony and that Tibet and the Tibetan areas of Sichuan are integral parts of Chinese territory. According to The Economist, the self-immolations have caused the government's attitude to harden.

Self-immolations by Tibetans protesting Chinese domination of Tibet have had a greater impact than earlier protests; despite considerable loss of life during the Tibetan protests in 2008 on the part of both the Tibetan and Han population in Tibet, casualties were simply not reported by the Chinese government. Self-immolations, on the other hand, result in dramatic images of the protester while burning or afterwards which can be easily transmitted over the internet to news media and supporters. Internet access has reached even remote areas in the parts of China where Tibetans live.

Tibetan-Muslim sectarian violence

In Tibet, the majority of Muslims are Hui people. Tension between Tibetans and Muslims stems from events during the Muslim warlord Ma Bufang's rule in Qinghai such as Ngolok rebellions (1917–49) and the Sino-Tibetan War. In the past riots have broken out between Muslims and Tibetans. The repression of Tibetan separatism by the Chinese government is supported by Hui Muslims. In addition, Chinese-speaking Hui have problems with Tibetan Hui (the Tibetan speaking Kache minority of Muslims).

The front gate of the main mosque in Lhasa was burned down by Tibetan rioters attempting to storm the building while Chinese Hui Muslim shops and restaurants were destroyed in the 2008 Tibetan unrest. Sectarian violence between Tibetan Buddhists and Muslims does not get widespread attention in the media.

Dalai Lama resigns political leadership role

The 14th Dalai Lama, Tenzin Gyatso, officially announced retirement from his role as the political leader of the Central Tibetan Administration in March 2011 just before elections were to take place to choose the next prime minister, which would become the highest ranking political office of the CTA. He had talked about doing so at least since 2008. In a press conference in December 2010, the Dalai Lama stated that the "400 year-old tradition" of the Dalai Lama serving as spiritual and political leader had already been terminated in 2001, after which the CTA's elected political leadership had been carrying out the administrative responsibilities. The Dalai Lama jokingly added that therefore, he had been in semi-retirement for a decade.

11th Panchen Lama, Gedhun Choekyi Nyima, forcibly disappeared on 17 May 1995, three days after being recognized on 14 May by the 14th Dalai Lama.

The Chinese government called the retirement a "political show" and said that the CTA is illegal and any moves will not be recognized. Kate Saunders of the International Campaign for Tibet speculated that governments who have found it politically troublesome for them to deal with the Dalai Lama as a political-religious leader may now be able to forge a formal relationship with him as a purely religious leader.

Dr. Lobsang Sangay, a Fulbright scholar and graduate of Harvard Law School who was born in a refugee camp in India in 1968 and who has never visited Tibet, was named Prime Minister of the CTA on April 27, 2011. He announced that he would spend his first five-year tenure in Dharamsala, India, the seat of the CTA. There he will not only assume the administrative responsibilities held by the previous PM, but will succeed the Dalai Lama as the political leader of the Tibetan cause, thus ignoring the PRC insistence that the Dalai Lama be succeeded by means of reincarnation, not another method of selection. Sangay, who once was a militant of the Tibetan Youth Congress, a group that unequivocally supports Tibetan independence, says he has matured and now supports the Middle Way Approach. Only about 80,000 Tibetans, half of the registered exile population, were eligible to vote because those living in Nepal were prevented by their host country from participating. The 6 million Tibetans inside Tibet and China did not participate. It is unknown if an exile government not led by the Dalai Lama, who was legitimated by religious tradition, will be viable.

Meanwhile, the Dalai Lama continues resisting Chinese domination over Tibetan culture and religion by describing China's policies as "some kind of policy, some kind of cultural genocide is taking place". China is also attempting to ensure that after leaving this lifetime, the Dalai Lama's Avalokiteshvara reincarnates meet China's approval: China has declared that the next Dalai Lama must be born in China, thereby excluding anyone born outside their political control. The Dalai Lama has refused to be reborn in China and has suggested that perhaps the bodhisattva of compassion will simply choose not to return to earth after this lifetime.

Since tradition dictates that only the Dalai Lamas can recognize the incarnations of the Panchen Lamas, who in turn can recognize the incarnations of Avalokiteshvara, the recognition of both the Dalai Lama and Panchen Lama incarnates are China's political objective. In the 11th Panchen Lama controversy, the Dalai Lama recognized Gedhun Choekyi Nyima in 1995, who was then forcibly disappeared from public three days later, along with his family, when he was 6 years old. The Chinese government says that he is under state protection, but has refused all requests from human rights organizations, including the UN Human Rights Council, to supply any proof of this. The Chinese government subsequently named their own Panchen Lama Gyaincain Norbu, installed at Tashilhunpo Monastery, who was recently appointed to the Chinese People's Political Consultative Conference.

Eutrophication

From Wikipedia, the free encyclopedia
Eutrophication can cause algal blooms like this one in a river near Chengdu, Sichuan, China. They are often harmful.

Eutrophication is the process by which an entire body of water, or parts of it, becomes progressively enriched with minerals and nutrients, particularly nitrogen and phosphorus. It has also been defined as "nutrient-induced increase in phytoplankton productivity". Water bodies with very low nutrient levels are termed oligotrophic and those with moderate nutrient levels are termed mesotrophic. Advanced eutrophication may also be referred to as dystrophic and hypertrophic conditions. Eutrophication can affect freshwater or salt water systems. In freshwater ecosystems it is almost always caused by excess phosphorus. In coastal waters on the other hand, the main contributing nutrient is more likely to be nitrogen, or nitrogen and phosphorus together. This depends on the location and other factors.

When occurring naturally, eutrophication is a very slow process in which nutrients, especially phosphorus compounds and organic matter, accumulate in water bodies. These nutrients derive from degradation and solution of minerals in rocks and by the effect of lichens, mosses and fungi actively scavenging nutrients from rocks. Anthropogenic or "cultural eutrophication" is often a much more rapid process in which nutrients are added to a water body from a wide variety of polluting inputs including untreated or partially treated sewage, industrial wastewater and fertilizer from farming practices. Nutrient pollution, a form of water pollution, is a primary cause of eutrophication of surface waters, in which excess nutrients, usually nitrogen or phosphorus, stimulate algal and aquatic plant growth.

A common visible effect of eutrophication is algal blooms. Algal blooms can either be just a nuisance to those wanting to use the water body or become harmful algal blooms that can cause substantial ecological degradation in water bodies. This process may result in oxygen depletion of the water body after the bacterial degradation of the algae.

Approaches for prevention and reversal of eutrophication include: minimizing point source pollution from sewage, and minimizing nutrient pollution from agriculture and other nonpoint pollution sources. Shellfish in estuaries, seaweed farming and geo-engineering in lakes are also being used, some at the experimental stage. The term eutrophication is widely used by both scientists and public policy-makers, giving it myriad definitions.

The term "eutrophication" comes from the Greek eutrophos, meaning "well-nourished".

Causes and mechanisms

1. Excess nutrients are applied to the soil. 2. Some nutrients leach into the soil and later drain into surface water. 3. Some nutrients run off over the ground into the body of water. 4. The excess nutrients cause an algal bloom. 5. The algal bloom reduces light penetration. 6. The plants beneath the algal bloom die because they cannot get sunlight to perform photosynthesis. 7. Eventually, the algal bloom dies and sinks to the bottom of the lake. Bacterial communities begin to decompose the remains, using up oxygen for respiration. 8. The decomposition causes the water to become depleted of oxygen if the water body is not regularly mixed vertically. Larger life forms, such as fish die.

Increasing biomass generation

Eutrophication is a process of increasing biomass generation in a water body caused by increasing concentrations of plant nutrients, most commonly phosphate and nitrate. Increasing nutrient concentrations lead to increasing growth of aquatic plants, both macrophytes and phytoplankton. As more plant material becomes available as a food resource, there are associated increases in invertebrates and fish species. As the process continues, the biomass of the water body increases and biological diversity decreases. With more severe eutrophication, bacterial degradation of the excess biomass results in oxygen consumption, which can create a state of hypoxia, beginning in the bottom sediment and deeper waters. Hypoxic zones are commonly found in deep water lakes in the summer season due to stratification into the cold oxygen-poor hypolimnion and the warm oxygen-rich epilimnion.

Strongly eutrophic freshwaters can become hypoxic throughout their depth following severe algal blooms or macrophyte overgrowths. Similarly in marine systems, both increasing nutrient concentrations and isolation of bodies of water from contact with the atmosphere, can lead to depletion of oxygen which can make these waters inhospitable to fish and invertebrates.

Phosphorus is a necessary nutrient for plants to live, and is the limiting factor for plant growth in most freshwater ecosystems. Phosphate adheres tightly to soil particles, so it is mainly transported by erosion and runoff. Once translocated to lakes, the extraction of phosphate into water is slow, hence the difficulty of reversing the effects of eutrophication.

In marine ecosystems nitrogen and iron are the primary limiting nutrients for the accumulation of algal biomass, but more generally in marine systems nitrogen, phosphorus and iron can all be limiting. The limitation of productivity in any particular aquatic system at any one time varies with the rate of supply of nutrients from external sources as well as nutrient recycling within the water body. Nutrient limitation of productivity also depends on the rate at which nutrients and algae are physically flushed out of that system or region. In addition light is an essential factor so productivity will be low at depth and in temperate winter when light levels are low.

Sources of nutrients

The sources of excess phosphate are phosphates in detergent, industrial/domestic run-offs, and fertilizers. With the phasing out of phosphate-containing detergents in the 1970s, industrial/domestic run-off, sewage and agriculture have emerged as the dominant contributors to eutrophication. The main sources of nitrogen beside natural nitrogen fixation are from agricultural runoff (from fertilizers and animal wastes), from sewage and from atmospheric deposition of nitrogen originating from combustion or animal waste.

Sources of anthropogenic nutrient pollution

Agriculture is the major source of nutrient pollution in the Gulf of Mexico. In the Chesapeake Bay, agriculture is a major source, along with urban areas and atmospheric deposition.
 
Mean eutrophying emissions (measured as
phosphate equivalents) of different foods
Food types Eutrophying emissions
(g PO43-eq per 100g protein)
Beef
365.3
Farmed fish
235.1
Farmed crustaceans
227.2
Cheese
98.4
Lamb and mutton
97.1
Pork
76.4
Poultry
48.7
Eggs
21.8
Groundnuts
14.1
Peas
7.5
Tofu
6.2
An example in Tennessee of how soil from fertilized fields can quickly turn into runoff creating a flux of nutrients that flows into a local water body.
 
The principal source(s) of nutrient pollution in an individual watershed depend on the prevailing land uses. The sources may be point sources, nonpoint sources, or both:

Nutrient pollution from some air pollution sources may occur independently of the local land uses, due to long-range transport of air pollutants from distant sources.

In order to gauge how to best prevent eutrophication from occurring, specific sources that contribute to nutrient loading must be identified. There are two common sources of nutrients and organic matter: point and nonpoint sources.
 
Sodium triphosphate, once a component of many detergents, was a major contributor to eutrophication.

Types

Cultural eutrophication

Cultural eutrophication is caused by human additions of nutrients into the water that cause over growth of algae which can block light and air exchange. The algae eventually are broken down by bacteria causing anoxic conditions and "dead zones".
 
Aerial view of Lake Valencia experiencing a large cultural eutrophication flux due to untreated wastewater discharging into the lake

Cultural or anthropogenic eutrophication is the process that speeds up natural eutrophication because of human activity. Due to clearing of land and building of towns and cities, land runoff is accelerated and more nutrients such as phosphates and nitrate are supplied to lakes and rivers, and then to coastal estuaries and bays. Cultural eutrophication results when excessive nutrients from human activities end up in water bodies creating nutrient pollution and also accelerating the natural process of eutrophication. The problem became more apparent following the introduction of chemical fertilizers in agriculture (green revolution of the mid-1900s). Phosphorus and nitrogen are the two main nutrients that cause cultural eutrophication as they enrich the water, allowing for some aquatic plants, especially algae to grow rapidly and bloom in high densities. Algal blooms can shade out benthic plants thereby altering the overall plant community. When algae die off, their degradation by bacteria removes oxygen, potentially, generating anoxic conditions. This anoxic environment kills off aerobic organisms (e.g. fish and invertebrates) in the water body. This also affects terrestrial animals, restricting their access to affected water (e.g. as drinking sources). Selection for algal and aquatic plant species that can thrive in nutrient-rich conditions can cause structural and functional disruption to entire aquatic ecosystems and their food webs, resulting in loss of habitat and species biodiversity.

There are several sources of excessive nutrients from human activity including run-off from fertilized fields, lawns and golf courses, untreated sewage and wastewater and internal combustion of fuels creating nitrogen pollution. Cultural eutrophication can occur in fresh water and salt water bodies, shallow waters being the most susceptible. In shore lines and shallow lakes, sediments are frequently resuspended by wind and waves which can result in nutrient release from sediments into the overlying water, enhancing eutrophication. The deterioration of water quality caused by cultural eutrophication can therefore negatively impact human uses including potable supply for consumption, industrial uses and recreation.

Natural eutrophication

Although eutrophication is commonly caused by human activities, it can also be a natural process, particularly in lakes. Paleolimnologists now recognise that climate change, geology, and other external influences are also critical in regulating the natural productivity of lakes. A few lakes also demonstrate the reverse process (meiotrophication), becoming less nutrient rich with time as nutrient poor inputs slowly elute the nutrient richer water mass of the lake. This process may be seen in artificial lakes and reservoirs which tend to be highly eutrophic on first filling but may become more oligotrophic with time. The main difference between natural and anthropogenic eutrophication is that the natural process is very slow, occurring on geological time scales.

Effects

Eutrophication is apparent as increased turbidity in the northern part of the Caspian Sea, imaged from orbit.

Ecological effects

Eutrophication can have the following ecological effects: increased biomass of phytoplankton, changes in macrophyte species composition and biomass, dissolved oxygen depletion, increased incidences of fish kills, loss of desirable fish species.

Decreased biodiversity

When an ecosystem experiences an increase in nutrients, primary producers reap the benefits first. In aquatic ecosystems, species such as algae experience a population increase (called an algal bloom). Algal blooms limit the sunlight available to bottom-dwelling organisms and cause wide swings in the amount of dissolved oxygen in the water. Oxygen is required by all aerobically respiring plants and animals and it is replenished in daylight by photosynthesizing plants and algae. Under eutrophic conditions, dissolved oxygen greatly increases during the day, but is greatly reduced after dark by the respiring algae and by microorganisms that feed on the increasing mass of dead algae. When dissolved oxygen levels decline to hypoxic levels, fish and other marine animals suffocate. As a result, creatures such as fish, shrimp, and especially immobile bottom dwellers die off. In extreme cases, anaerobic conditions ensue, promoting growth of bacteria. Zones where this occurs are known as dead zones.

New species invasion

Eutrophication may cause competitive release by making abundant a normally limiting nutrient. This process causes shifts in the species composition of ecosystems. For instance, an increase in nitrogen might allow new, competitive species to invade and out-compete original inhabitant species. This has been shown to occur in New England salt marshes. In Europe and Asia, the common carp frequently lives in naturally eutrophic or hypereutrophic areas, and is adapted to living in such conditions. The eutrophication of areas outside its natural range partially explain the fish's success in colonizing these areas after being introduced.

Toxicity

Some harmful algal blooms resulting from eutrophication, are toxic to plants and animals. Toxic compounds can make their way up the food chain, resulting in animal mortality. Freshwater algal blooms can pose a threat to livestock. When the algae die or are eaten, neuro- and hepatotoxins are released which can kill animals and may pose a threat to humans. An example of algal toxins working their way into humans is the case of shellfish poisoning. Biotoxins created during algal blooms are taken up by shellfish (mussels, oysters), leading to these human foods acquiring the toxicity and poisoning humans. Examples include paralytic, neurotoxic, and diarrhoetic shellfish poisoning. Other marine animals can be vectors for such toxins, as in the case of ciguatera, where it is typically a predator fish that accumulates the toxin and then poisons humans.

Economic effects

Eutrophication and harmful algal blooms can have economic impacts due to increasing water treatment costs, commercial fishing and shellfish losses, recreational fishing losses (reductions in harvestable fish and shellfish), and reduced tourism income (decreases in perceived aesthetic value of the water body). Water treatment costs can be increased due to decreases in water transparency (increased turbidity). There can also be issues with color and smell during drinking water treatment.

Health impacts

Human health effects include excess nitrate in drinking water (blue baby syndrome); disinfection by-products in drinking water. Swimming in water affected by a harmful algal bloom can cause skin rashes and respiratory problems.

Causes and effects for different types of water bodies

Freshwater systems

One response to added amounts of nutrients in aquatic ecosystems is the rapid growth of microscopic algae, creating an algal bloom. In freshwater ecosystems, the formation of floating algal blooms are commonly nitrogen-fixing cyanobacteria (blue-green algae). This outcome is favored when soluble nitrogen becomes limiting and phosphorus inputs remain significant. Nutrient pollution is a major cause of algal blooms and excess growth of other aquatic plants leading to overcrowding competition for sunlight, space, and oxygen. Increased competition for the added nutrients can cause potential disruption to entire ecosystems and food webs, as well as a loss of habitat, and biodiversity of species.

When macrophytes and algae die in over-productive eutrophic lakes, rivers and streams, they decompose and the nutrients contained in that organic matter are converted into inorganic form by microorganisms. This decomposition process consumes oxygen, which reduces the concentration of dissolved oxygen. The depleted oxygen levels in turn may lead to fish kills and a range of other effects reducing biodiversity. Nutrients may become concentrated in an anoxic zone, often in deeper waters cut off by stratification of the water column and may only be made available again during autumn turn-over in temperate areas or in conditions of turbulent flow. The dead algae and organic load carried by the water inflows into a lake settle to the bottom and undergo anaerobic digestion releasing greenhouse gases such as methane and CO2. Some of the methane gas may be oxidised by anaerobic methane oxidation bacteria such as Methylococcus capsulatus, which in turn may provide a food source for zooplankton. Thus a self-sustaining biological process can take place to generate primary food source for the phytoplankton and zooplankton depending on the availability of adequate dissolved oxygen in the water body.

Enhanced growth of aquatic vegetation, phytoplankton and algal blooms disrupts normal functioning of the ecosystem, causing a variety of problems such as a lack of oxygen which is needed for fish and shellfish to survive. The growth of dense algae in surface waters can shade the deeper water and reduce the viability of benthic shelter plants with resultant impacts on the wider ecosystem. Eutrophication also decreases the value of rivers, lakes and aesthetic enjoyment. Health problems can occur where eutrophic conditions interfere with drinking water treatment.

Phosphorus is often regarded as the main culprit in cases of eutrophication in lakes subjected to "point source" pollution from sewage pipes. The concentration of algae and the trophic state of lakes correspond well to phosphorus levels in water. Studies conducted in the Experimental Lakes Area in Ontario have shown a relationship between the addition of phosphorus and the rate of eutrophication. Later stages of eutrophication lead to blooms of nitrogen-fixing cyanobacteria limited solely by the phosphorus concentration.

Coastal waters

Map of measured Gulf hypoxia zone, July 25–31, 2021, LUMCON-NOAA
 
Oxygen minimum zones (OMZs) (blue) and areas with coastal hypoxia (red) in the world's ocean

Eutrophication is a common phenomenon in coastal waters. In coastal waters, nitrogen is commonly the key limiting nutrient of marine waters (unlike the freshwater systems where phosphorus is often the limiting nutrient). Therefore, nitrogen levels are more important than phosphorus levels for understanding and controlling eutrophication problems in salt water. Estuaries, as the interface between freshwater and saltwater, can be both phosphorus and nitrogen limited and commonly exhibit symptoms of eutrophication. Eutrophication in estuaries often results in bottom water hypoxia or anoxia, leading to fish kills and habitat degradation. Upwelling in coastal systems also promotes increased productivity by conveying deep, nutrient-rich waters to the surface, where the nutrients can be assimilated by algae.

Examples of anthropogenic sources of nitrogen-rich pollution to coastal waters include sea cage fish farming and discharges of ammonia from the production of coke from coal. In addition to runoff from land, wastes from fish farming and industrial ammonia discharges, atmospheric fixed nitrogen can be an important nutrient source in the open ocean. This could account for around one third of the ocean's external (non-recycled) nitrogen supply, and up to 3% of the annual new marine biological production.

Coastal waters embrace a wide range of marine habitats from enclosed estuaries to the open waters of the continental shelf. Phytoplankton productivity in coastal waters depends on both nutrient and light supply, with the latter an important limiting factor in waters near to shore where sediment resuspension often limits light penetration.

Nutrients are supplied to coastal waters from land via river and groundwater and also via the atmosphere. There is also an important source from the open ocean, via mixing of relatively nutrient rich deep ocean waters. Nutrient inputs from the ocean are little changed by human activity, although climate change may alter the water flows across the shelf break. By contrast, inputs from land to coastal zones of the nutrients nitrogen and phosphorus have been increased by human activity globally. The extent of increases varies greatly from place to place depending on human activities in the catchments. A third key nutrient, dissolved silicon, is derived primarily from sediment weathering to rivers and from offshore and is therefore much less affected by human activity.

Effects of coastal eutrophication

These increasing nitrogen and phosphorus nutrient inputs exert eutrophication pressures on coastal zones. These pressures vary geographically depending on the catchment activities and associated nutrient load. The geographical setting of the coastal zone is another important factor as it controls dilution of the nutrient load and oxygen exchange with the atmosphere. The effects of these eutrophication pressures can be seen in several different ways:

  1. There is evidence from satellite monitoring that the amounts of chlorophyll as a measure of overall phytoplankton activity are increasing in many coastal areas worldwide due to increased nutrient inputs.
  2. The phytoplankton species composition may change due to increased nutrient loadings and changes in the proportions of key nutrients. In particular the increases in nitrogen and phosphorus inputs, along with much smaller changes in silicon inputs, create changes in the ratio of nitrogen and phosphorus to silicon. These changing nutrient ratios drive changes in phytoplankton species composition, particularly disadvantaging silica rich phytoplankton species like diatoms compared to other species. This process leads to the development of nuisance algal blooms in areas such as the North Sea (see also OSPAR Convention) and the Black Sea. In some cases nutrient enrichment can lead to harmful algal blooms (HABs). Such blooms can occur naturally, but there is good evidence that these are increasing as a result of nutrient enrichment, although the causal linkage between nutrient enrichment and HABs is not straightforward.
  3. Oxygen depletion has existed in some coastal seas such as the Baltic for thousands of years. In such areas the density structure of the water column severely restricts water column mixing and associated oxygenation of deep water. However, increases in the inputs of bacterially degradable organic matter to such isolated deep waters can exacerbate such oxygen depletion in oceans. These areas of lower dissolved oxygen have increased globally in recent decades. They are usually connected with nutrient enrichment and resulting algal blooms. Climate change will generally tend to increase water column stratification and so exacerbate this oxygen depletion problem. An example of such coastal oxygen depletion is in the Gulf of Mexico where an area of seasonal anoxia more than 5000 square miles in area has developed since the 1950s. The increased primary production driving this anoxia is fueled by nutrients supplied by the Mississippi river. A similar process has been documented in the Black Sea.

Extent of the problem

Eutrophication in a canal

Surveys showed that 54% of lakes in Asia are eutrophic; in Europe, 53%; in North America, 48%; in South America, 41%; and in Africa, 28%. In South Africa, a study by the CSIR using remote sensing has shown more than 60% of the reservoirs surveyed were eutrophic.

The World Resources Institute has identified 375 hypoxic coastal zones in the world, concentrated in coastal areas in Western Europe, the Eastern and Southern coasts of the US, and East Asia, particularly Japan.

Global goals

The United Nations framework for Sustainable Development Goals recognizes the damaging effects of eutrophication for marine environments. It has established a timeline for creating an Index of Coastal Eutrophication and Floating Plastic Debris Density (ICEP) within Sustainable Development Goal 14 (life below water). SDG 14 specifically has a target to: "by 2025, prevent and significantly reduce marine pollution of all kinds, in particular from land-based activities, including marine debris and nutrient pollution".

Prevention

The eutrophication of Mono Lake, which is a cyanobacteria-rich soda lake

Minimizing point source pollution from sewage

Finnish phosphorus removal measures started in the mid-1970s and have targeted rivers and lakes polluted by industrial and municipal discharges. These efforts have had a 90% removal efficiency. Still, some targeted point sources did not show a decrease in runoff despite reduction efforts.

There are multiple different ways to fix cultural eutrophication with raw sewage being a point source of pollution. For example, sewage treatment plants can be upgraded for biological nutrient removal so that they discharge much less nitrogen and phosphorus to the receiving water body. However, even with good secondary treatment, most final effluents from sewage treatment works contain substantial concentrations of nitrogen as nitrate, nitrite or ammonia. Removal of these nutrients is an expensive and often difficult process.

Laws regulating the discharge and treatment of sewage have led to dramatic nutrient reductions to surrounding ecosystems. Because a major contributor to the nonpoint source nutrient loading of water bodies is untreated domestic sewage, it is necessary to provide treatment facilities to highly urbanized areas, particularly those in developing countries, in which treatment of domestic waste water is a scarcity. The technology to safely and efficiently reuse wastewater, both from domestic and industrial sources, should be a primary concern for policy regarding eutrophication.

Minimizing nutrient pollution by agriculture

There are many ways to help fix cultural eutrophication caused by agriculture. Safe farming practices is the number one way to fix the problem. Some safety precautions are:

  1. Nutrient Management Techniques - Anyone using fertilizers should apply fertilizer in the correct amount, at the right time of year, with the right method and placement.
  2. Year - Round Ground Cover - a cover crop will prevent periods of bare ground thus eliminating erosion and runoff of nutrients even after the growing season has occurred.
  3. Planting Field Buffers - By planting trees, shrubs and grasses along the edges of fields to help catch the runoff and absorb some nutrients before the water makes it to a nearby water body.
  4. Conservation Tillage - By reducing frequency and intensity of tilling the land will enhance the chance of nutrients absorbing into the ground.

Minimizing nonpoint pollution

Nonpoint pollution is the most difficult source of nutrients to manage. The literature suggests, though, that when these sources are controlled, eutrophication decreases. The following steps are recommended to minimize the amount of pollution that can enter aquatic ecosystems from ambiguous sources.

Riparian buffer zones

Studies show that intercepting non-point pollution between the source and the water is a successful means of prevention. Riparian buffer zones are interfaces between a flowing body of water and land, and have been created near waterways in an attempt to filter pollutants; sediment and nutrients are deposited here instead of in water. Creating buffer zones near farms and roads is another possible way to prevent nutrients from traveling too far. Still, studies have shown that the effects of atmospheric nitrogen pollution can reach far past the buffer zone. This suggests that the most effective means of prevention is from the primary source.

Prevention policy

A policy regulating agricultural use of fertilizer and animal waste must be imposed. In Japan the amount of nitrogen produced by livestock is adequate to serve the fertilizer needs for the agriculture industry. Thus, it is not unreasonable to command livestock owners to collect animal waste from the field, which when left stagnant will leach into ground water.

Policy concerning the prevention and reduction of eutrophication can be broken down into four sectors: Technologies, public participation, economic instruments, and cooperation. The term technology is used loosely, referring to a more widespread use of existing methods rather than an appropriation of new technologies. As mentioned before, nonpoint sources of pollution are the primary contributors to eutrophication, and their effects can be easily minimized through common agricultural practices. Reducing the amount of pollutants that reach a watershed can be achieved through the protection of its forest cover, reducing the amount of erosion leeching into a watershed. Also, through the efficient, controlled use of land using sustainable agricultural practices to minimize land degradation, the amount of soil runoff and nitrogen-based fertilizers reaching a watershed can be reduced. Waste disposal technology constitutes another factor in eutrophication prevention.

The role of the public is a major factor for the effective prevention of eutrophication. In order for a policy to have any effect, the public must be aware of their contribution to the problem, and ways in which they can reduce their effects. Programs instituted to promote participation in the recycling and elimination of wastes, as well as education on the issue of rational water use are necessary to protect water quality within urbanized areas and adjacent water bodies.

Economic instruments, "which include, among others, property rights, water markets, fiscal and financial instruments, charge systems and liability systems, are gradually becoming a substantive component of the management tool set used for pollution control and water allocation decisions." Incentives for those who practice clean, renewable, water management technologies are an effective means of encouraging pollution prevention. By internalizing the costs associated with the negative effects on the environment, governments are able to encourage a cleaner water management.

Because a body of water can have an effect on a range of people reaching far beyond that of the watershed, cooperation between different organizations is necessary to prevent the intrusion of contaminants that can lead to eutrophication. Agencies ranging from state governments to those of water resource management and non-governmental organizations, going as low as the local population, are responsible for preventing eutrophication of water bodies. In the United States, the most well known inter-state effort to prevent eutrophication is the Chesapeake Bay.

Nitrogen testing and modeling

Soil nitrogen testing (N-Testing) is a technique that helps farmers optimize the amount of fertilizer applied to crops. By testing fields with this method, farmers saw a decrease in fertilizer application costs, a decrease in nitrogen lost to surrounding sources, or both. By testing the soil and modeling the bare minimum amount of fertilizer are needed, farmers reap economic benefits while reducing pollution.

Organic farming

Organically fertilized fields can "significantly reduce harmful nitrate leaching" compared to conventionally fertilized fields. Eutrophication impacts are in some cases higher from organic production than they are from conventional production.

Reversal and remediation

Recovering from eutrophication

Mussels are an example of organisms that act as nutrient bioextractors.

Reducing nutrient inputs is a key precondition for restoration, but there are two caveats: Firstly it can take a long time, particularly because of the storage of nutrients in sediments. Secondly, restoration may need more than a simple reversal of inputs since there are sometimes several stable but very different ecological states. Recovery of eutrophicated lakes is slow, often requiring several decades.

Innovative solutions have been conceived to deal with nutrient pollution in aquatic systems by altering or enhancing natural processes to shift nutrient effects away from detrimental ecological impacts. Nutrient remediation is a form of environmental remediation, but concerns only biologically active nutrients such as nitrogen and phosphorus. "Remediation" refers to the removal of pollution or contaminants, generally for the protection of human health. In environmental remediation nutrient removal technologies include biofiltration, which uses living material to capture and biologically degrade pollutants. Examples include green belts, riparian areas, natural and constructed wetlands, and treatment ponds. These areas most commonly capture anthropogenic discharges such as wastewater, stormwater runoff, or sewage treatment, for land reclamation after mining, refinery activity, or land development. Biofiltration utilizes biological assimilation to capture, absorb, and eventually incorporate the pollutants (including nutrients) into living tissue. Another form of nutrient removal is bioremediation, which uses microorganisms to remove pollutants. Bioremediation can occur on its own as natural attenuation or intrinsic bioremediation or can be encouraged by the addition of fertilizers, a strategy called biostimulation.

Nutrient bioextraction is bioremediation involving cultured plants and animals. Nutrient bioextraction or bioharvesting is the practice of farming and harvesting shellfish and seaweed for the purpose of removing nitrogen and other nutrients from natural water bodies. It has been suggested that nitrogen removal by oyster reefs could generate net benefits for sources facing nitrogen emission restrictions, similar to other nutrient trading scenarios. Specifically, if oysters maintain nitrogen levels in estuaries below thresholds that would lead to the imposition of emission limits, oysters effectively save the sources the compliance costs they otherwise would incur. Several studies have shown that oysters and mussels have the capacity to dramatically impact nitrogen levels in estuaries. Additionally, studies have demonstrated seaweed's potential to improve nitrogen levels.

Shellfish in estuaries

One proposed solution to stop and reverse eutrophication in estuaries is to restore shellfish populations, such as oysters and mussels. Oyster reefs remove nitrogen from the water column and filter out suspended solids, subsequently reducing the likelihood or extent of harmful algal blooms or anoxic conditions. Filter feeding activity is considered beneficial to water quality by controlling phytoplankton density and sequestering nutrients, which can be removed from the system through shellfish harvest, buried in the sediments, or lost through denitrification. Foundational work toward the idea of improving marine water quality through shellfish cultivation was conducted by Odd Lindahl et al., using mussels in Sweden. In the United States, shellfish restoration projects have been conducted on the East, West and Gulf coasts. See nutrient pollution for an extended explanation of nutrient remediation using shellfish.

Seaweed farming

Seaweed aquaculture offers an opportunity to mitigate, and adapt to climate change. Seaweed, such as kelp, also absorbs phosphorus and nitrogen and is thus useful to remove excessive nutrients from polluted parts of the sea. Some cultivated seaweeds have a very high productivity and could absorb large quantities of N, P, CO2, producing large amounts of O2 having an excellent effect on decreasing eutrophication. It is believed that seaweed cultivation in large scale should be a good solution to the eutrophication problem in coastal waters.

Geo-engineering in lakes (chemical phosphorus removal)

Application of a phosphorus sorbent to a lake - The Netherlands

Geo-engineering is the manipulation of biogeochemical processes, usually the phosphorus cycle, to achieve a desired ecological response in the ecosystem. Geo-engineering techniques typically uses materials able to chemically inactivate the phosphorus available for organisms (i.e. phosphate) in the water column and also block the phosphate release from the sediment (internal loading). Phosphate is one of the main contributing factors to algal growth, mainly cyanobacteria, so once phosphate is reduced the algal is not able to overgrow. Thus, geo-engineering materials is used to speed-up the recovery of eutrophic water bodies and manage algal bloom. There are several phosphate sorbents in the literature, from metal salts (e.g. alum, aluminium sulfate,) minerals, natural clays and local soils, industrial waste products, modified clays (e.g. lanthanum modified bentonite) and others. The phosphate sorbent is commonly applied in the surface of the water body and it sinks to the bottom of the lake reducing phosphate, such sorbents have been applied worldwide to manage eutrophication and algal bloom (for example under the commercial name Phoslock).

One method of eutrophication remediation uses chemical phosphorus removal with aluminum sulfate, a salt commonly used in the coagulation process of drinking water treatment. Aluminum sulfate, or "alum" as it is commonly referred, is used to reduce the phosphorus load. In a large scale study, 114 lakes were monitored for the effectiveness of alum at phosphorus reduction. Across all lakes, alum effectively reduced the phosphorus for 11 years. While there was variety in the longevity (21 years in deep lakes and 5.7 years in shallow lakes), the results express the effectiveness of alum at controlling phosphorus within lakes. Alum treatment is less effective in deep lakes, as well as lakes with substantial external phosphorus loading.

History

Eutrophication was recognized as a water pollution problem in European and North American lakes and reservoirs in the mid-20th century. Breakthrough research carried out at the Experimental Lakes Area (ELA) in Ontario, Canada, in the 1970s  provided the evidence that freshwater bodies are phosphorus-limited. ELA uses the whole ecosystem approach and long-term, whole-lake investigations of freshwater focusing on cultural eutrophication.

Terrestrial eutrophication

Whilst eutrophication is usually referring to aquatic systems, some authors have used the term "terrestrial eutrophication" for terrestrial ecosystems. This is defined as "enrichment of an ecosystem with a limiting nutrient" and can be caused by nitrogen deposition on terrestrial ecosystems. For example, atmospheric CO2 fertilization can exacerbate the eutrophication of the boreal forest biome.

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