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Friday, July 19, 2024

Conservation in the United States

Yosemite National Park

Conservation in the United States can be traced back to the 19th century with the formation of the first National Park. Conservation generally refers to the act of consciously and efficiently using land and/or its natural resources. This can be in the form of setting aside tracts of land for protection from hunting or urban development, or it can take the form of using less resources such as metal, water, or coal. Usually, this process of conservation occurs through or after legislation on local or national levels is passed.

Conservation in the United States, as a movement, began with the American sportsmen who came to the realization that wanton waste of wildlife and their habitat had led to the extinction of some species, while other species were at risk. John Muir and the Sierra Club started the modern movement, history shows that the Boone and Crockett Club, formed by Theodore Roosevelt, spearheaded conservation in the United States.

While conservation and preservation both have similar definitions and broad categories, preservation in the natural and environmental scope refers to the action of keeping areas the way they are and trying to dissuade the use of its resources; conservation may employ similar methods but does not call for the diminishing of resource use but rather calls for a responsible way of going about it. A distinction between Sierra Club and Boone and Crockett Club is that Sierra Club was and is considered a preservationist organization whereas Boone and Crockett Club endorses conservation, simply defined as an "intelligent use of natural resources."

History

The High Peaks Wilderness Area in the 6,000,000-acre (24,000 km2) Adirondack Park is a publicly protected area located in northeast New York.

Philosophy of early American conservation movement

During the 19th century, some Americans developed a deep and abiding passion for nature. The early evolution of the conservation movement began through both public and private recognition of the relationship between man and nature often reflected in the great literary and artistic works of the 19th century. Artists, such as Albert Bierstadt, painted powerful landscapes of the American West during the mid 19th century, which were incredibly popular ages representative of the unique natural wonders of the American frontier. Likewise, in 1860, Frederic Edwin Church painted "Twilight in the Wilderness", which was an artistic masterpiece of the era that explored the growing importance of the American wilderness.

American writers also romanticized and focused upon nature as a subject matter. However, one of the most notable literary figures upon the early conservation movement proved to be Henry David Thoreau. Throughout his work, Walden, Thoreau detailed his experiences at the natural setting of Walden Pond and his deep appreciation for nature. In one instance, he described a deep grief for a tree that was cut down. Thoreau went on to bemoan the lack of reverence for the natural world: "I would that our farmers when they cut down a forest felt some of that awe which the old Romans did when they came to thin, or let in the light to, a consecrated grove". As he states in Walden, Thoreau "was interested in the preservation" of nature. In 1860, Henry David Thoreau delivered a speech to the Middlesex Agricultural Society in Massachusetts; the speech, entitled "The Succession of Forest Trees", explored forest ecology and encouraged the agricultural community to plant trees. This speech became one of Thoreau's "most influential ecological contributions to conservationist thought".

A basis for the philosophy curated by the prominent sportsmen, writers, anthropologists, and politicians came from observing Native Americans and how they interacted with the resources available to them. For example, George Bird Grinnell was an anthropologist who joined an expedition in 1870 which encountered different tribes such as the Pawnee for large, extended periods of time. He noted their use of every single part of an animal following a hunt and that they ceremoniously prepared for utilizing and taking any resource the land was able to provide them. These observations, fraught with condemning language toward the way European hunters and sportsmen treated wildlife and resources such as timber, were published in widely circulated journals and magazines at the time.

Early American Conservation Movement

The conservation of natural resources is the fundamental problem. Unless we solve that problem, it will avail us little to solve all others.

Theodore Roosevelt

America had its own conservation movement in the 19th century, most often characterized by George Perkins Marsh, author of Man and Nature. The expedition into northwest Wyoming in 1871 led by F. V. Hayden and accompanied by photographer William Henry Jackson provided the imagery needed to substantiate rumors about the grandeur of the Yellowstone region, and resulted in the creation of Yellowstone National Park, the world's first, in 1872. In 1887, Theodore Roosevelt, George Bird Grinnell and other prominent sportsmen of the day formed the first true North American conservation organization, the Boone and Crockett Club, with the purpose of addressing the looming conservation crises of the day. Travels by later U.S. President Theodore Roosevelt through the region around Yellowstone provided the impetus for the creation of the Yellowstone Timberland Reserve in 1891. The largest section of the reserve was later renamed Shoshone National Forest, and it is the oldest National Forest in the U.S. But it was not until 1898 when German forester Dr. Carl A. Schenck, on the Biltmore Estate, and Cornell University founded the first two forestry schools, both run by Germans. Bernard Fernow, founder of the forestry schools at Cornell and the University of Toronto, was originally from Prussia (Germany), and he honed his knowledge from Germans who pioneered forestry in India. He introduced Gifford Pinchot, the "father of American forestry", to Brandis and Ribbentrop in Europe. From these men, Pinchot learned the skills and legislative patterns he would later apply to America. Pinchot, in his memoir history Breaking New Ground, credited Brandis especially with helping to form America's conservation laws.

In 1891, Congress passed the Forest Reserve Act, which allowed the President of the United States to set aside forest lands on public domain. A decade after the Forest Reserve Act, presidents Harrison, Cleveland, and McKinley had transferred approximately 50,000,000 acres (200,000 km2) into the forest reserve system. However, President Theodore Roosevelt is credited with the institutionalization of the conservation movement in the United States.

John Muir

John Muir was one of the founding fathers of the preservation movement in  the United States in the late 19th century. He believed that nature had intrinsic value and viewed nature as a sacred religious temple, which opposed the view of many utilitarian conservationists. One of Muir’s first endeavors was helping create Yosemite National Park. He first visited Yosemite in 1868 and went back annually until 1871. These visits ultimately led to his support to create Yosemite National Park nearly 20 years later in 1890.

Starting in the 1870s, when Muir first arrived, until 1930 there was a mass removal of Native American people from their homeland in Yosemite National Park. The majority of these people were from the Miwok tribe, which according to author Robert Enberg of the John Muir Newsletter, Muir characterized as “poor, lazy, and dirty” and according to author Jedediah Purdy as “four legged animal people”.  

In 1901, Muir published the essay “Our National Parks” which was used to promote tourism to national parks. He assured future visitors and readers that most of the Native Americans were dead or civilized into useless innocence. This furthered the prominence of the racist ideologies Muir had to the Miwok tribe and other tribes he dealt with around the country.

After the creation of Yosemite National Park, Muir as well as the United States government pushed for the creation of Yellowstone and Glacier National Park. This led to the removal and killing of Native peoples. Early preservationists like Muir believed that these Native people were “‘primitives’ who were obstructing the progress of the nation's destiny” (544). These racist beliefs have been coined by historian Mark Spence as “the justifying myth”(544). which the government's and preservationists like Muir’s used to rationalize their political ideologies towards native people.  

John Muir is remembered because of his respect for the non-human world and his unique view of nature. However, according to Jedediah Purdy, Muir’s views of Native people cannot be excused as “casual” for the time period he lived in. Overall, his impact on the early preservation movement has been monumental and still impacts us today.

Gifford Pinchot

Gifford Pinchot was a key figure in the early conservation movement in the United States. After graduating from Yale in 1889 he pursued a career in forestry in which he was later appointed head of the Division of Forestry in 1898. Later he was appointed as the first chief of the United States Forest Service in 1905 under Theodore Roosevelt.

When appointed as the head of the U.S. Forest Service, Pinchot as well as President Roosevelt pushed what was known as “new conservationism.” This new wave of conservation led a more progressive agenda which forced the issue of conservation into the limelight. He believed “the fundamental principle of the whole conservation policy is that of use, to take every part of the land and its resources and put it to that use in which it will serve the most people '' (Pinchot 1913). Using this ideology he later pushed for the creation of national forests as well as one of Pinchot’s most controversial decisions in Hetch Hetchy Valley. 

The damming of Hetch Hetchy Valley located in Yosemite National Park was proposed in 1913 by a conservationist group led by Pinchot and Roosevelt and was opposed by a group of preservationists led by John Muir. Pinchot’s view on conservation was more utilitarian, meaning he wanted to use nature's resources for the benefit of the public, while Muir believed that the Valley should not be touched as he viewed nature in a religious light. The O’Shaughnessy dam was ultimately built in 1923 and led to the drowning of the sacred indigenous land of the Miwok and Yokuts tribes.

Prior to the dam being built Native peoples had access to resources from the Tuolumne River. The river provided plant foods like seeds, berries, leaves, bulbs, and tubers. Year-around water was available for drinking, food preparation, and other practical uses. The area provided a plentiful food source for tribes that included birds, deer, and other mammals. These animals were also used for clothing and ornamentation. Plentiful fibers like grasses, sedges, and roots were used for baskets and other useful items. These resources also found their way into tools and weapons. The Native tribes used obsidian which became an important material resource used for arrow points, scrapers, and blades. Once the dam was put into place it destroyed the Miwok and Yokuts people's ways of life.

Pinchot’s impact in the early conservation movement in the United States is undeniable. However, the implementation of the dam was tragic for the Native people surrounding Hetch Hetchy. It was a complete landscape transformation and destroyed an entire ecosystem that the Native tribes once relied on. 

Theodore Roosevelt

President Theodore Roosevelt believed the conservation movement was not about the preservation of nature simply for nature itself. After his experiences traveling as an enthusiastic, zealous hunter, Roosevelt became convinced of "the need for measures to protect the game species from further destruction and eventual extinction". President Roosevelt recognized the necessity of carefully managing America's natural resources. According to Roosevelt, "We are prone to speak of the resources of this country as inexhaustible; this is not so". Nonetheless, Roosevelt believed that conservation of America's natural resources was for the successful management and continued sustain yield harvesting of these resources in the future for the benefit and enjoyment of the American people. Roosevelt took several major steps to further his conservation goals. In 1902, Roosevelt signed the National Reclamation Act, which allowed for the management and settlement of a large tract of barren land. Then, in 1905, President Roosevelt helped to create the United States Forest Service and then appointed respected forester, Gifford Pinchot, as the first head of the agency. By the end of his presidency, Theodore Roosevelt, in partnership with Gifford Pinchot, had successfully increased the number of national parks and led to the forced removal of Native Americans from their homeland.

The legacy of his actions as president at the turn of the twentieth century include estimated 230 million acres of land as public lands, through his establishment of the United States Forest Service as well as dozens of national forests, national parks, and bird reserves, in addition to 4 game preserves. This legacy, though establishing what many consider the root of modern conservationism, remained within the hands of powerful men of white European heritage for years to come, often excluding the interests of Native Americans and other demographics within the United States.

Despite these advancements, the American conservation movement did have difficulties. In the early 1900s the conservation movement in America was split into two main groups: conservationists, like Pinchot and Roosevelt, who were utilitarian foresters and natural rights advocates who wanted to protect forests "for the greater good for the greatest length", and preservationists, like John Muir, the founder of the Sierra Club. Important differences separated conservationists like Roosevelt and Pinchot from preservationists like Muir. Conservationists wanted regulated use of forest lands for both public activities and commercial endeavors, preservationists wanted forest to be preserved for natural beauty, scientific study, recreation, and believed only certain people should be able to visit these nature sites. The differences continue to the modern era, with sustainable harvest and multiple-use the major focus of the U.S. Forest Service and recreation emphasized by the National Park Service.

Although national parks can logistically fall under the category of preservation sites, certain marked National Conservation Area sites fall near or within proximity of national parks and share a common land history. The United States government began driving groups of Native American peoples out of popularly visited in Yellowstone around the late 1800s once they ironically deemed them a conflict to tourists. Battles between federal troops and the Nez Perce tribe soon ensued, and eventually the tribe was driven out of the area. Conservation history fails to incorporate details like this when talking about the beginnings and context of the movement.

Native American Removal and National Parks

Throughout the history of the United States conservation movement, Native people have been removed or set aside at the expense of creating “scenic playgrounds” across the country. The creation of several national parks like Yellowstone National Park in 1872, Yosemite National Park in 1890, and the creation of Glacier National Park in 1910, have all come at the expense of Native peoples. These parks were especially relevant because they held a native population. These parks became precedents for the exclusion of native people from their homeland and are all symbols of American wilderness movements. 

The creation of Glacier National Park was possibly the most detrimental for indigenous tribes. Historian Mark David Spence explains how the Blackfeet people, whose reservation was located just east of Glacier National Park, were over time slowly removed and filtered out of their homeland through corrupt policy from the United States Department of the Interior. The tribe maintained an 1895 agreement with the United States that permitted them certain rights near and within the location of the park. In 1910 the Department of the Interior argued for their exclusion from Glacier National Park as they felt their presence in the glacier backcountry was “illegal.” Spence explains how “Blackfeet men and women who entertained tourists appeared to be living museum specimens who no longer used the Glacier wilderness- if, indeed, they ever had” (29).

The backcountry that the Blackfeet people were ultimately removed holds important religious sites, plants, and animals that the tribe has a deep connection to. The creation of the park also led to large increases in hunting in the area. The increase in hunting in the area from the late 19th century to the creation of the park led to the near extinction of the buffalo in the area. The Blackfeet people are deeply tied to hunting buffalo in the area as their meat would provide them food and their pelts provided them clothing. With the near extinction of buffalo in the area for sporting purposes,the Blackfeet people had to turn to other animals like elk and deer.

Modern American conservation movement

In 1956 the US Post Office began issuing postage stamps depicting wildlife to emphasize the importance of wildlife conservation in America.

By the mid-twentieth century, conservation efforts continued to gain ground with the creation and implementation of federal legislation aimed at protecting wilderness, natural resources, and wildlife. This trend on the part of the federal government towards a more protection minded approach to the environment began with the passage of the Federal Water Pollution Act in 1948 and the Air Pollution Control Act in 1955. While neither of these regulations themselves served to impose tight restrictions on either water or air pollution, they lay the groundwork for what would later become the Clean Water Act and the Clean Air Act, as well as serving to demonstrate the recognition on the part of the federal government of the need to codify regulations geared towards environmental protection.

Notable Events

1962: Silent Spring

The 1962 publication of Rachel Carson's best seller book Silent Spring represented a major watershed moment in American conservation. In exposing the individual dangers presented to both people and nature through the use of chemical pesticides, Carson inspired an environmental revolution, helping to root the modern conservation movement in a scientific foundation. It would take another decade, however, before the use of DDT was banned in the United States.

1960s: Orca Conservation and Its Effect on Indigenous Kinship Relationships

Native American Nations have fought throughout history to practice Tribally unique kinship relationships with the nonhuman world.. The push for progressive conservation in the United States in the late 19th century and early 20th century destroyed many kinship relationships Native tribes had with the nonhuman world.

U.S. conservation practices harming Native kinship relations continued into the 1960s. Demand for ocean exhibits was at an all-time high in the United States. This pushed the initiative for the capturing of orcas (killer whales) in the Salish Sea located in the northwest United States. Hundreds of orcas were captured and displaced from their families as well as many being killed in the process. The primary goals of these exhibits were supposed to be for public education and conservation efforts. However, These whales have been used for economic benefit for sea parks across the world. Since 1961, during the push for public orca conservation education “at least 179 orcas have died in captivity, not including 30 miscarried or still-born calves.”

The Lummi Nation native to the Salish Sea have deep kinship ties to the killer whale, and in recent years have been fighting to release these animals from captivity. Lummi tribal matriarch Raynell Morris explains that the Lummi have “lived with killer whales since time immemorial and call them qwe’lhol’mechen, the people beneath the waves because we see them as people whose cetacean regalia allows them to live underwater.” The Lummi believe that healing the orca population or “family” will help heal their Lummi and human selves. In recent years Morris and members of the Lummi nation launched an initiative to have a whale from the Miami Aquarium released named Sk’aliCh’elh-tenaut, who had spent nearly 50 years in captivity. In 2023, Sk’aliCh’elh-tenaut was set to be released but died of kidney failure just before she was released.

According to environmental scholars, U.S. environmental agencies like the NOAA are “treating the whales as educational, economic, and environmental possessions while degrading the relationship of the Lummi to the whales as relatives and attacking Lummi sovereignty.” For generations, Lummi rituals have shown to be very effective when it comes to sustaining and conserving salmon and orca populations, but Native people and their traditions are being pushed aside as they have been throughout the history of conservation in the United States.  

The Wilderness Act of 1964

On 3 September 1964, President Lyndon B. Johnson signed the Wilderness Act of 1964 into law. This milestone was achieved by the efforts of environmental conservationists dedicated to the protection of some of the wildest lands in the United States. Chief among these were Howard Zahniser and Olaus Murie and Mardy Murie, and Celia Hunter, who dedicated much of their lives and their work to the protection and conservation of wild lands. By 1950 both Zanhiser and Olaus Murie were working for the Wilderness Society, Zahinser as Executive Secretary in Washington DC, and Olaus as president from his ranch in Moose, WY (now home to the Murie Center). From their positions at Wilderness Society, both men continued to work to organize and build broad-based support for the creation and protection of wilderness areas within the United States. Zahniser felt strongly that Congress ought to designate wilderness areas, as opposed to leaving it up to Agency discretion, and, in 1955, began working to convince members of Congress to support a bill that would establish a national wilderness preservation system. Meanwhile, in 1956, Olaus and Mardy Murie embarked upon an expedition to the upper Sheenjek River on the south slope of the Brooks Range in Alaska, which would galvanize them to campaign for the protection of the area as a wildlife refuge. Celia Hunter, with Ginny Wood, founded the Alaska Conservation Society, the first statewide environmental organization, in 1960. Serving on the board, she worked tirelessly to get legislation passed to protect Alaskan wilderness. Celia was also the first female president of the Wilderness Society. The result of these efforts was the protection of 8 million acres as the Arctic National Wildlife Range, renamed the Arctic National Wildlife Refuge when it was expanded to 19 million acres in 1980. Moreover, the mission underlying the protection of ANWR, namely the preservation of an entire ecological system, became the underlying motivation for the preservation of other large tracts of wild lands.

While neither Zahniser nor Olaus Murie would live to see the Wilderness Act signed by President Johnson, it is unlikely that, without their tireless efforts, the preservation movement would have been able to achieve so huge a victory. On 3 September 1964, Mardy Murie stood proudly next to President Johnson in the Rose Garden at the White House and bore witness to the making of history, and the achievement of the very thing for which Zahniser and Olaus had campaigned so ardently.

Clinton Administration 1993-2001

Though liberal Democrats gave environmentalism a higher priority than the economy-focused President Bill Clinton did, the Clinton administration responded to public demand for environmental protection. Clinton created 17 national monuments by executive order, prohibiting commercial activities such as logging, mining, and drilling for oil or gas. Clinton also imposed a permanent freeze on drilling in maritime sanctuaries. Other presidential and departmental orders protected various wetlands and coastal resources and extended the existing moratorium on new oil leases off the coast line through 2013. After the Republican victory in the 1994 elections, Clinton vetoed a series of budget bills that contained amendments designed to scale back environmental restrictions. Clinton boasted that his administration "adopted the strongest air-quality protections ever, improved the safety of our drinking water and food, cleaned up about three times as many toxic waste sites as the two previous administrations combined, [and] helped to promote a new generation of fuel-efficient vehicles and vehicles that run on alternative fuels".

Vice President Gore was keenly concerned with global climate change, and Clinton created the President's Council on Sustainable Development. In November 1998, Clinton signed the Kyoto Protocol, an international agreement in which developed countries committed to reducing carbon emissions. However, the Senate refused to ratify it since the agreement did not apply to the rapidly growing emissions of developing countries such as China, India, and Indonesia.

The key person on environmental issues was Bruce Babbitt, the head of the League of Conservation Voters, who served for all eight years as the United States Secretary of the Interior. According to John D. Leshy:

His most remembered legacies will likely be his advocacy of environmental restoration, his efforts to safeguard and build support for the ESA (Endangered Species Act of 1973) and the biodiversity the that it helps protect., And the public land conservation measures that flowered on his watch.

The Interior Department worked to protect scenic and historic areas of America's federal public lands. In 2000 Babbitt created the National Landscape Conservation System, a collection of 15 U.S. National Monuments and 14 National Conservation Areas to be managed by the Bureau of Land Management in such a way as to keep them "healthy, open, and wild."

A major issue involved low fees charged ranchers who grazed cattle on public lands. The "animal unit month" (AUM) fee was only $1.35 and was far below the 1983 market value. The argument was that the federal government in effect was subsidizing ranchers, with a few major corporations controlling millions of acres of grazing land. Babbitt and Oklahoma Congressman Mike Synar tried to rally environmentalists and raise fees, but senators from Western states successfully blocked their proposals.

Twenty-First Century

Ultimately, the modern conservation movement in the United States continues to strive for the delicate balance between the successful management of society's industrial progress while still preserving the integrity of the natural environment that sustains humanity. In a large part, today's conservation movement in the United States is a joint effort of individuals, grassroots organizations, nongovernmental organizations, learning institutions, and various government agencies, such as the United States Forest Service.

For the modern era, the U.S. Forest Service has noted three important aspects of the conservation movement: the climate change, water issues, and the education of the public on conservation of the natural environment, especially among children. In regards to climate change, the U.S. Forest Service has undertaken a twenty-year research project to develop ways to counteract issues surrounding climate change. However, some small steps have been taken regarding climate change. As rising greenhouse gases contribute to global warming, reforestation projects are seeking to counteract rising carbon emissions. In Oregon, the Department of Forestry has developed a small reforestation program in which landowners can lease their land for one hundred years to grow trees. In turn, these trees offset carbon emissions from power companies. Moreover, reforestation projects have other benefits: reforested areas serve as a natural filter of agricultural fertilizers even as new wildlife habitats are created. Reforested land can also contribute to the local economy as rural landowners also distribute hunting leases during the years between harvests.

In essence, projects, such as reforestation, create a viable market of eco-friendly services mutually beneficial to landowners, businesses and society, and most importantly, the environment. Nonetheless, such creative plans will be necessary in the near future as the United States struggles to maintain a positive balance between society and the finite natural resources of the nation. Ultimately, through dedicated research, eco-friendly practices of land management, and efforts to educate the public regarding the necessity of conservation, those individuals dedicated to American conservation seek to preserve the nation's natural resources.

Twenty-First Century resource protection

The increased consumption of many natural resources has sparked the need for protection. Many of these resources were barely touched less than half a century ago but have been drained in several situations. One of these resources, water, is key to survival of almost all life but is being used quicker than it is replenished in many states within the United States. This has created the need for greater conservation which has been met by new techniques and technologies for both reducing the amount of water being used and increasing how efficiently it is being used. Some of these methods are as simple as replacing the fixtures in government buildings and offering rebates to citizens, but are as complex as growing genetically engineered food crops so that farmers can consume less water for use on them.

Another key resource that has been met with new legislation is the land that is used to grow the crops for farms. One fairly new United States government policy, the Farmland Protection Policy Act, is designed in order to protect this resource from being over consumed by the government. It does this by ensuring that any entity, both federal and non-federal, that uses government assistance such as acquiring or disposing of land, providing financing or loans, managing property, providing technical assistance, cannot convert agricultural land into land that is permanently used for other purposes if it can be avoided.

If the overuse of these resources is not mitigated, the eventual result would be the loss of another key resource for survival. That is, if either land for agriculture or water for the land and the people who inhabit it becomes insufficient, the population in the United States would begin to run out of food. Not only would cash crops of plants become insufficient to supply people, it would also become insufficient to feed the livestock and animals that also depend on plants that are grown on agricultural land. Because of this, the need for conservation is greater than ever, especially when current efforts have only been able to slow the gradual depletion of these two key resources while increased populations create the need for higher consumption.

Ecotourism

Ecotourists viewing a glacier.

The goal of ecotourism is to attract appreciation and attention to specific sites, which may include protected land for conservation, while minimizing the impact that tourism has on the land. It is a form of conservation because the area may be protected while tourists or businesses are also using the land for lodging or other types of accommodations that utilize resources in any way. This movement has gained international traction and recognition. The United Nations declared 2002 the International Year of Ecotourism. Ecotourism seeks to balance an interest and appreciation of protected lands with a commitment to preserving them. A study conducted by the University of Georgia reported that environmentalists should team up with ecotourists in order to have the best chance to preserve fragile ecosystems and lands. Tourism provides economic incentives to conserve lands, for if protected lands are seen as revenue-generating tourist destinations, there is monetary reason to ensure their conservation. Also, rather than simply relying on environmental messaging, ecotourism allows conservationists to pursue a leisurely and economic message.

Current Conservation Developments & Issues

Social Issues and Threats to Access

John Muir

At a 2014 event held at UCLA centered upon environmental figures like John Muir, a few historians and writers noted that the movements for conservation and preservation of the environment maintained a foundation in "economic privilege and abundant leisure time of the upper class." Jon Christensen, a historian of UCLA's Institute of Environment and Sustainability, notes among the other critics at the event that writings and actions from conservationists at the turn of the twentieth century have created a legacy for the movement as one of an older white demographic.

General concern among the current conservation movement deals with the accessibility of conserved/protected areas as well as the movement itself to communities of color especially. Richard White, a historian at Stanford University, makes the case that viewpoints of early conservationists came from an Anglo-Saxon, biblical point of view and that this is reflected in the current demographics of visitors to national parks and protected areas. At the same time, recent polls suggest that the Latino community in California tends to possess more environmental attitudes when it comes to voting than perceived by the general public. A highly cited historian of Southern California, D. J. Waldie, posits that conservation for the purpose of public enjoyment is usually geared for places inaccessible to minority demographics, such as skiing or backpacking in the Sierra Nevadas. Instead, he puts forth that the conservation areas of importance for these communities are local bodies of water or small mountain ranges, urban parks, and even their own backyards.

Indigenous Conservation

Citizen Potawatomi environmental scholar Kyle Powys White believes that just futures for indigenous people through conservation must be tailored to the specific needs and values of each indigenous community. He believes that “while surface similarities are present, it is perhaps more accurate to say that indigenous conservationists and restorationists tend to focus on sustaining particular plants and animals whose lives are entangled locally—and often over many generations—in ecological, cultural, and economic relationships with human societies and other nonhuman species” (2). Providing Native people the ability to use their traditional methods to conserve and restore of native species, can be one of the first steps taken in order to give just futures for indigenous people.  

Tulalip Tribal professor Stephanie Fyrberg  believes that in order to bring just futures to indigenous people  their stories must be told. Fryberg says “throughout history, Natives in this country have been pushed aside and our experiences have been erased. We were put on reservations that were often extremely remote and we were characterized in entertainment as either noble savages or as people broken by centuries of colonization. In many respects, these actions and stories erased, misrepresented, and dehumanized us.” Hearing indigenous stories can help bring just futures for Native people and can bring ecological health futures to not just indigenous people but all people using indigenous conservation methods.

Events

Past Events

Current Events

Enforcement

Game wardens or conservation officers are employed to protect wildlife and natural areas.

Projects

Political

On January 20, 2017, a bill was introduced to congress that aimed to roll back regulations on oil and gas drilling in National Parks. The bill would nullify the "General Provisions and Non-Federal Oil and Gas Rights" rule passed in November 2016, and this would remove protections to National Park lands and resources.

On February 28, 2017, Donald Trump signed an executive order to review the Clean Water Rule, a bill he and Scott Pruitt have pledged to eliminate since he took office. The Clean Water rule was enacted in 2015 and extended federal protection to millions of acres of lakes, rivers, and wetlands.

On March 16, 2017, Donald Trump released his preliminary budget proposal for 2018 discretionary spending. These budget proposals featured cuts to both the EPA and the Department of Interior. The 12% decrease for the Department of Interior is removing spending from land acquisition costs associated with the preservation and expansion of National Parks. The budget also completely defunded National Heritage Areas. Funding to National Heritage Areas is used in part to support tribal protection officers and provides grants to underrepresented communities, ones who have already been putting conservation in practice. The proposed budget would cut the staff of the Environmental Protection Agency by 3,200 and reduce their budget by $2.6 billion annually.

Trump's promise to eliminate 2 federal regulations for every new regulation proposed may impact lands set aside for conservation. The repeal of old regulations will put currently conserved land at risk: future perceived threats to conserved lands and resources might not be able to be stopped since the erasure of regulation that sought to combat past threats to conserved lands may be eliminated.

Ryan Zinke, Trump's appointed Secretary of the Interior, moved to reverse federal regulation that prohibits hunters from using lead ammunition in National Parks.

According to a report from the Center for American Progress, the administration of Joe Biden reached a record in conservation. In 3 years of ruling it conserved or in the process of conserving more than 24 millions acres of public land and in 2023 alone more than 12.5 million acres of public land became protected area. It is doing it together with the indigenous people as 200 agreements of co-stewardship with them were signed in 2023 alone.

Protected areas

Key figures

Some of the more notable American conservationists include:

 

Thursday, July 18, 2024

Image editing

From Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Image_editing
A colorized version of originally black and white photo, colorized using GIMP
Original black and white photo: Migrant Mother, showing Florence Owens Thompson, taken by Dorothea Lange in 1936.
This is a photo that has been edited as a Bokeh effect, using a Gaussian blur.

Image editing encompasses the processes of altering images, whether they are digital photographs, traditional photo-chemical photographs, or illustrations. Traditional analog image editing is known as photo retouching, using tools such as an airbrush to modify photographs or editing illustrations with any traditional art medium. Graphic software programs, which can be broadly grouped into vector graphics editors, raster graphics editors, and 3D modelers, are the primary tools with which a user may manipulate, enhance, and transform images. Many image editing programs are also used to render or create computer art from scratch. The term "image editing" usually refers only to the editing of 2D images, not 3D ones.

Basics of image editing

Raster images are stored in a computer in the form of a grid of picture elements, or pixels. These pixels contain the image's color and brightness information. Image editors can change the pixels to enhance the image in many ways. The pixels can be changed as a group, or individually, by the sophisticated algorithms within the image editors. This article mostly refers to bitmap graphics editors, which are often used to alter photographs and other raster graphics. However, vector graphics software, such as Adobe Illustrator, CorelDRAW, Xara Designer Pro or Inkscape, are used to create and modify vector images, which are stored as descriptions of lines, Bézier curves, and text instead of pixels. It is easier to rasterize a vector image than to vectorize a raster image; how to go about vectorizing a raster image is the focus of much research in the field of computer vision. Vector images can be modified more easily because they contain descriptions of the shapes for easy rearrangement. They are also scalable, being rasterizable at any resolution.

Automatic image enhancement

Camera or computer image editing programs often offer basic automatic image enhancement features that correct color hue and brightness imbalances as well as other image editing features, such as red eye removal, sharpness adjustments, zoom features and automatic cropping. These are called automatic because generally they happen without user interaction or are offered with one click of a button or mouse button or by selecting an option from a menu. Additionally, some automatic editing features offer a combination of editing actions with little or no user interaction.

Super-resolution imaging

There is promising research on using deep convolutional networks to perform super-resolution. In particular work has been demonstrated showing the transformation of a 20x microscope image of pollen grains into a 1500x scanning electron microscope image using it. While this technique can increase the information content of an image, there is no guarantee that the upscaled features exist in the original image and deep convolutional upscalers should not be used in analytical applications with ambiguous inputs. These methods can hallucinate image features, which can make them unsafe for medical use.

Digital data compression

Many image file formats use data compression to reduce file size and save storage space. Digital compression of images may take place in the camera, or can be done in the computer with the image editor. When images are stored in JPEG format, compression has already taken place. Both cameras and computer programs allow the user to set the level of compression.

Some compression algorithms, such as those used in PNG file format, are lossless, which means no information is lost when the file is saved. By contrast, the more popular JPEG file format uses a lossy compression algorithm (based on discrete cosine transform coding) by which the greater the compression, the more information is lost, ultimately reducing image quality or detail that can not be restored. JPEG uses knowledge of the way the human brain and eyes perceive color to make this loss of detail less noticeable.

Image editor features

Listed below are some of the most used capabilities of the better graphics manipulation programs. The list is by no means all-inclusive. There are a myriad of choices associated with the application of most of these features.

Selection

One of the prerequisites for many of the applications mentioned below is a method of selecting part(s) of an image, thus applying a change selectively without affecting the entire picture. Most graphics programs have several means of accomplishing this, such as:

  • a marquee tool for selecting rectangular or other regular polygon-shaped regions,
  • a lasso tool for freehand selection of a region,
  • a magic wand tool that selects objects or regions in the image defined by proximity of color or luminance,
  • vector-based pen tools,

as well as more advanced facilities such as edge detection, masking, alpha compositing, and color and channel-based extraction. The border of a selected area in an image is often animated with the marching ants effect to help the user to distinguish the selection border from the image background.

Layers

Leonardo da Vinci's Vitruvian Man overlaid with Goethe's Color Wheel using a screen layer in Adobe Photoshop. Screen layers can be helpful in graphic design and in creating multiple exposures in photography.
Leonardo da Vinci's Vitruvian Man overlaid a soft light layer Moses Harris's Color Wheel and a soft light layer of Ignaz Schiffermüller's Color Wheel. Soft light layers have a darker, more translucent look than screen layers.

Another feature common to many graphics applications is that of Layers, which are analogous to sheets of transparent acetate (each containing separate elements that make up a combined picture), stacked on top of each other, each capable of being individually positioned, altered and blended with the layers below, without affecting any of the elements on the other layers. This is a fundamental workflow which has become the norm for the majority of programs on the market today, and enables maximum flexibility for the user while maintaining non-destructive editing principles and ease of use.

Image size alteration

Image editors can resize images in a process often called image scaling, making them larger, or smaller. High image resolution cameras can produce large images which are often reduced in size for Internet use. Image editor programs use a mathematical process called resampling to calculate new pixel values whose spacing is larger or smaller than the original pixel values. Images for Internet use are kept small, say 640 x 480 pixels which would equal 0.3 megapixels.

Cropping an image

Digital editors are used to crop images. Cropping creates a new image by selecting a desired rectangular portion from the image being cropped. The unwanted part of the image is discarded. Image cropping does not reduce the resolution of the area cropped. Best results are obtained when the original image has a high resolution. A primary reason for cropping is to improve the image composition in the new image.

Uncropped image from camera
Lily cropped from larger image

Cutting out a part of an image from the background

Using a selection tool, the outline of the figure or element in the picture is traced/selected, and then the background is removed. Depending on how intricate the "edge" is this may be more or less difficult to do cleanly. For example, individual hairs can require a lot of work. Hence the use of the "green screen" technique (chroma key) which allows one to easily remove the background.

Histogram

Image editors have provisions to create an image histogram of the image being edited. The histogram plots the number of pixels in the image (vertical axis) with a particular brightness value (horizontal axis). Algorithms in the digital editor allow the user to visually adjust the brightness value of each pixel and to dynamically display the results as adjustments are made. Improvements in picture brightness and contrast can thus be obtained.

Sunflower image
Histogram of Sunflower image

Noise reduction

Image editors may feature a number of algorithms which can add or remove noise in an image. Some JPEG artifacts can be removed; dust and scratches can be removed and an image can be de-speckled. Noise reduction merely estimates the state of the scene without the noise and is not a substitute for obtaining a "cleaner" image. Excessive noise reduction leads to a loss of detail, and its application is hence subject to a trade-off between the undesirability of the noise itself and that of the reduction artifacts.

Noise tends to invade images when pictures are taken in low light settings. A new picture can be given an 'antiqued' effect by adding uniform monochrome noise.

Removal of unwanted elements

Most image editors can be used to remove unwanted branches, etc., using a "clone" tool. Removing these distracting elements draws focus to the subject, improving overall composition.

Notice the branch in the original image
The eye is drawn to the center of the globe.

Selective color change

Some image editors have color swapping abilities to selectively change the color of specific items in an image, given that the selected items are within a specific color range.

Selective color change

Image orientation

Image orientation (from left to right): original, 30° CCW rotation, and flipped.

Image editors are capable of altering an image to be rotated in any direction and to any degree. Mirror images can be created and images can be horizontally flipped or vertically flopped. A small rotation of several degrees is often enough to level the horizon, correct verticality (of a building, for example), or both. Rotated images usually require cropping afterwards, in order to remove the resulting gaps at the image edges.

Perspective control and distortion

Perspective control: original (left), perspective distortion removed (right).

Some image editors allow the user to distort (or "transform") the shape of an image. While this might also be useful for special effects, it is the preferred method of correcting the typical perspective distortion which results from photographs being taken at an oblique angle to a rectilinear subject. Care is needed while performing this task, as the image is reprocessed using interpolation of adjacent pixels, which may reduce overall image definition. The effect mimics the use of a perspective control lens, which achieves a similar correction in-camera without loss of definition.

Lens correction

Photo manipulation packages have functions to correct images for various lens distortions including pincushion, fisheye and barrel distortions. The corrections are in most cases subtle, but can improve the appearance of some photographs.

Enhancing images

In computer graphics, the enhancement of an image is the process of improving the quality of a digitally stored image by manipulating the image with software. It is quite easy, for example, to make an image lighter or darker, or to increase or decrease contrast. Advanced photo enhancement software also supports many filters for altering images in various ways. Programs specialized for image enhancement are sometimes called image editors.

Sharpening and softening images

Graphics programs can be used to both sharpen and blur images in a number of ways, such as unsharp masking or deconvolution. Portraits often appear more pleasing when selectively softened (particularly the skin and the background) to better make the subject stand out.  This can be achieved with a camera by using a large aperture, or in the image editor by making a selection and then blurring it. Edge enhancement is an extremely common technique used to make images appear sharper, although purists frown on the result as appearing unnatural.

Image sharpening: original (top), image sharpened (bottom).

Another form of image sharpening involves a form of contrast. This is done by finding the average color of the pixels around each pixel in a specified radius, and then contrasting that pixel from that average color. This effect makes the image seem clearer, seemingly adding details. An example of this effect can be seen to the right. It is widely used in the printing and photographic industries for increasing the local contrasts and sharpening the images.

Selecting and merging of images

Photomontage of 16 photos which have been digitally manipulated in Photoshop to give the impression that it is a real landscape

Many graphics applications are capable of merging one or more individual images into a single file. The orientation and placement of each image can be controlled.

When selecting a raster image that is not rectangular, it requires separating the edges from the background, also known as silhouetting. This is the digital-analog of cutting out the image from a physical picture. Clipping paths may be used to add silhouetted images to vector graphics or page layout files that retain vector data. Alpha compositing, allows for soft translucent edges when selecting images. There are a number of ways to silhouette an image with soft edges, including selecting the image or its background by sampling similar colors, selecting the edges by raster tracing, or converting a clipping path to a raster selection. Once the image is selected, it may be copied and pasted into another section of the same file, or into a separate file. The selection may also be saved in what is known as an alpha channel.

A popular way to create a composite image is to use transparent layers. The background image is used as the bottom layer, and the image with parts to be added are placed in a layer above that. Using an image layer mask, all but the parts to be merged are hidden from the layer, giving the impression that these parts have been added to the background layer. Performing a merge in this manner preserves all of the pixel data on both layers to more easily enable future changes in the new merged image.

Slicing of images

A more recent tool in digital image editing software is the image slicer. Parts of images for graphical user interfaces or web pages are easily sliced, labeled and saved separately from whole images so the parts can be handled individually by the display medium. This is useful to allow dynamic swapping via interactivity or animating parts of an image in the final presentation.

Special effects

An example of some special effects that can be added to a picture

Image editors usually have a list of special effects that can create unusual results. Images may be skewed and distorted in various ways. Scores of special effects can be applied to an image which include various forms of distortion, artistic effects, geometric transforms and texture effects, or combinations thereof.

A complex effect in the first image from the right


Using custom Curves settings in Image editors such as Photoshop, one can mimic the "pseudo-solarisation" effect, better known in photographic circles as the Sabattier-effect.

A pseudo-solarised color image

Stamp Clone Tool

The Clone Stamp tool selects and samples an area of your picture and then uses these pixels to paint over any marks. The Clone Stamp tool acts like a brush so you can change the size, allowing cloning from just one pixel wide to hundreds. You can change the opacity to produce a subtle clone effect. Also, there is a choice between Clone align or Clone non-align the sample area. In Photoshop this tool is called Clone Stamp, but it may also be called a Rubber Stamp tool.



Image after stamp tool processed

Change color depth

An example of converting an image from color to grayscale

It is possible, using the software, to change the color depth of images. Common color depths are 2, 4, 16, 256, 65,536 and 16.7 million colors. The JPEG and PNG image formats are capable of storing 16.7 million colors (equal to 256 luminance values per color channel). In addition, grayscale images of 8 bits or less can be created, usually via conversion and down-sampling from a full-color image. Grayscale conversion is useful for reducing the file size dramatically when the original photographic print was monochrome, but a color tint has been introduced due to aging effects.

Contrast change and brightening

An example of contrast correction. Left side of the image is untouched.

Image editors have provisions to simultaneously change the contrast of images and brighten or darken the image. Underexposed images can often be improved by using this feature. Recent advances have allowed more intelligent exposure correction whereby only pixels below a particular luminosity threshold are brightened, thereby brightening underexposed shadows without affecting the rest of the image. The exact transformation that is applied to each color channel can vary from editor to editor. GIMP applies the following formula:

if (brightness < 0.0)  value = value * ( 1.0 + brightness);
                  else value = value + ((1 - value) * brightness);
value = (value - 0.5) * (tan ((contrast + 1) * PI/4) ) + 0.5;

where value is the input color value in the 0..1 range and brightness and contrast are in the −1..1 range.

Gamma correction

In addition to the capability of changing the images' brightness and/or contrast in a non-linear fashion, most current image editors provide an opportunity to manipulate the images' gamma value.

Gamma correction is particularly useful for bringing details that would be hard to see on most computer monitors out of shadows. In some image editing software, this is called "curves", usually, a tool found in the color menu, and no reference to "gamma" is used anywhere in the program or the program documentation. Strictly speaking, the curves tool usually does more than simple gamma correction, since one can construct complex curves with multiple inflection points, but when no dedicated gamma correction tool is provided, it can achieve the same effect.

Color adjustments

An example of color adjustment using raster graphics editor

The color of images can be altered in a variety of ways. Colors can be faded in and out, and tones can be changed using curves or other tools. The color balance can be improved, which is important if the picture was shot indoors with daylight film, or shot on a camera with the white balance incorrectly set. Special effects, like sepia tone and grayscale, can be added to an image. In addition, more complicated procedures such as the mixing of color channels are possible using more advanced graphics editors.

The red-eye effect, which occurs when flash photos are taken when the pupil is too widely open (so that light from the flash that passes into the eye through the pupil reflects off the fundus at the back of the eyeball), can also be eliminated at this stage.

Dynamic blending

Before and After example of Advanced Dynamic Blending Technique created by Elia Locardi

Advanced Dynamic Blending is a concept introduced by photographer Elia Locardi in his blog Blame The Monkey to describe the photographic process of capturing multiple bracketed exposures of a land or cityscape over a specific span of time in a changing natural or artificial lighting environment. Once captured, the exposure brackets are manually blended together into a single High Dynamic Range image using post-processing software. Dynamic Blending images serve to display a consolidated moment. This means that while the final image may be a blend of a span of time, it visually appears to represent a single instant.

Printing

Control printed image by changing pixels-per-inch

Controlling the print size and quality of digital images requires an understanding of the pixels-per-inch (ppi) variable that is stored in the image file and sometimes used to control the size of the printed image. Within Adobe Photoshop's Image Size dialog, the image editor allows the user to manipulate both pixel dimensions and the size of the image on the printed document. These parameters work together to produce a printed image of the desired size and quality. Pixels per inch of the image, pixel per inch of the computer monitor, and dots per inch on the printed document are related, but in use are very different. The Image Size dialog can be used as an image calculator of sorts. For example, a 1600 × 1200 image with a resolution of 200 ppi will produce a printed image of 8 × 6 inches. The same image with 400 ppi will produce a printed image of 4 × 3 inches. Change the resolution to 800 ppi, and the same image now prints out at 2 × 1.5 inches. All three printed images contain the same data (1600 × 1200 pixels), but the pixels are closer together on the smaller prints, so the smaller images will potentially look sharp when the larger ones do not. The quality of the image will also depend on the capability of the printer.

California mixed evergreen forest

From Wikipedia, the free encyclopedia
California mixed evergreen forest in the Santa Cruz Mountains.

California mixed evergreen forest is a plant community found in the mountain ranges of California and southwestern Oregon.

The Mixed evergreen forest plant community is native to the Northern and Southern California Coast Ranges and Sierra Nevada of central and northern California; the Transverse Ranges and Peninsular Ranges of southern California; and the southwestern Oregon Coast Ranges.

California mixed evergreen forests occur in ecoregions of the California Floristic Province, including in areas of the California chaparral and woodlands and its sub-ecoregions, Klamath-Siskiyou Mountains forests, Northern California coastal forests, and Sierra Nevada lower montane forest. The mixed evergreen forests of each ecoregion have slightly different species composition.

Klamath-Siskiyou mixed evergreen forest

The mixed evergreen forests of the Klamath Mountains-Siskiyou Mountains occur above 300 meters (1000 ft) elevation, and are of four main types. Douglas-fir forests are found on gentle slopes, north-facing slopes, ridges with deep soil, and river terraces with deep sediments, usually underlain with sedimentary rocks. Coast Douglas-fir (Pseudotsuga menziesii ssp. menziesii) is the predominant tree, occupying up to 70% of the forest cover. Broadleaf evergreen trees are relatively few. Tree species of secondary importance are:

On granite soils, a similar species composition predominates, but with more broadleaf evergreens, chiefly:

On steep, well drained slopes, canyon live oak is the dominant species, with coast Douglas-fir in a minor role.

On serpentine soils, mixed evergreen forests are made up of:

moister areas
drier areas

California Coast Ranges mixed evergreen forest

Mixed evergreen forests in the California Coast Ranges vary in species related to coastal (Outer Ranges) or inland (Inner Ranges) climate influences. It usually happens in the elevation from 0 meter to 500 meters high. Mountains in the San Francisco Bay Area frequently support mixed evergreen forests. Generally the moister the forest habitat the greater the understory density. Coast mixed evergreen is drier than coast redwood and it is a four-layer forest structure. The conifers are usually emergent as canopy layer and broad-leaf evergreen trees emerge as sub-canopy layer. The shrubs occur as the understory species.

Those closer to the coast receiving adequate fog moisture and high rainfall generally will feature the following species:
Further inland, on north facing slopes or protected canyons, these forests are drier and generally lack tanoak, Douglas fir, and coast redwood. Species typical of the drier neighboring oak woodlands join the mix:

Common wildlife include Steller's jay, chestnut-backed chickadee, western gray squirrel, raccoon and many others. These forests are more diverse in animal life than those having only conifers. The predominance of broadleaf trees provide a greater abundance of food sources.

Southern Coast, Transverse, and Peninsular Ranges mixed evergreen forest

Also called southern mixed evergreen forests, the mixed evergreen forests of the southern California Coast Ranges, the Transverse Ranges, and the northern Peninsular Ranges, are restricted to cooler north-facing slopes at higher elevations.

Predominant tree species include:

Northern California coastal forests

Northern California coastal forests
Ecology
RealmNearctic
BiomeTemperate coniferous forests
Borders
Bird species232
Mammal species77
Geography
Area13,300 km2 (5,100 sq mi)
CountryUnited States
States
Climate typeMediterranean (Csb)
Conservation
Conservation statusCritical/Endangered
Habitat loss4.6828%
Protected15.76%

The Northern California coastal forests are a temperate coniferous forests ecoregion of coastal Northern California and southwestern Oregon.

Setting

The ecoregion covers 13,300 square kilometres (5,100 sq mi), extending from just north of the California-Oregon border south, to southern Monterey County. The ecoregion rarely extends more than 65 km inland from the coast, narrower in the southernmost parts of the ecoregion.

The ecoregion is a sub-ecoregion of the Pacific temperate rain forests ecoregion, which extends up the Pacific Coast to Kodiak Island in Alaska. The ecoregion lies close to the Pacific Ocean, and is kept moist by Pacific Ocean storms during the winter months, and by coastal fogs in the summer months. These factors keep the ecoregion cooler in the summer and warmer in the winter, as compared to ecoregions further inland. The ecoregion is also defined by the distribution of the Coast Redwood (Sequoia sempervirens), with isolated groves located in protected canyons as far south as Redwood Gulch, in southern Monterey County. The greatest concentration of remaining Old-growth forest are in the northernmost portion of the ecoregion, primarily within Humboldt and Del Norte counties.

Major urban centers located within this ecoregion include the montane portions of various cities of the San Francisco Peninsula, Fort Bragg, Eureka, and Brookings.

Habitats

Redwood forests are interspersed with several other plant communities throughout this ecoregion.

Coastal redwood forests

Notholithocarpus densiflorus, with Coast Douglas-firs Pseudotsuga menziesii subsp. menziesii and Coast Redwood behind in Sunset Trail, Big Basin Redwoods State Park, Santa Cruz Mountains, California.

The dominant forest type in this ecoregion is the coastal redwood forest. These are the tallest forests on Earth, with individual redwood (Sequoia sempervirens) trees reaching heights of 100 metres (330 ft). These forests are generally found in areas exposed to coastal fog. In the north, they occur on upland slopes, in riparian zones, and on riverine terraces. In the south, where annual precipitation is lower, they are constrained to coves and ravines. Coast Douglas-firs (Pseudotsuga menziesii var. menziesii) are nearly always associated with redwoods, but in the north the forests can also include Sitka spruce (Picea sitchensis), western hemlock (Tsuga heterophylla) and western red cedar (Thuja plicata). Like coast Douglas-fir, tanoak (Notholithocarpus densiflorus) is often present. Other hardwoods include California bay laurel (Umbellularia californica), red alder (Alnus rubra), madrone (Arbutus menziesii), and bigleaf maple (Acer macrophyllum). The deep shade cast by redwoods often results in a sparse understory, but shade-tolerant species include thimbleberry (Rubus parviflorus), redwood sorrel (Oxalis oregana), elk clover (Aralia californica), dwarf Oregon grape (Mahonia nervosa), salal (Gaultheria shallon), and many ferns, such as deer fern (Blechnum spicant), sword fern (Polystichum munitum), and leathery polypody (Polypodium scouleri). 

Mixed evergreen forests

Mixed evergreen forests are found just inland of the redwood forests, on Franciscan Assemblage soils that receive moderate to high rainfall. The trees are a variety of needle-leaved and broad-leaved evergreen species. Characteristic trees include coast Douglas-fir (Pseudotsuga menziesii var. menziesii), canyon live oak (Quercus chrysolepis), tanoak (Notholithocarpus densiflorus), madrone (Arbutus menziesii), California bay laurel (Umbellularia californica), and golden chinquapin (Chrysolepis chrysophylla). The shrub understory is dense and diverse; beaked hazel (Corylus cornuta), evergreen huckleberry (Vaccinium ovatum), Pacific rhododendron (Rhododendron macrophyllum), salal (Gaultheria shallon), Sadler's oak (Quercus sadleriana), dwarf Oregon-grape (Mahonia nervosa), and poison oak (Toxicodendron diversilobum) are typically found.

Closed-cone conifer forests and woodlands

Pinus muricata forest growing at Point Reyes, California

Closed-cone conifer forests are found in small, scattered patches throughout the ecoregion, typically adjacent to maritime chaparral. Common pines are lodgepole pine (Pinus contorta), bishop pine (Pinus muricata), Monterey pine (Pinus radiata), and knobcone pine (Pinus attenuata). These forests can also be home to several endemic cypresses, including Monterey cypress (Cupressus macrocarpa), Gowen cypress (Cupressus goveniana), and Santa Cruz cypress (Cupressus abramsiana). Shrub species include glossyleaf manzanita (Arctostaphylos nummularia), bog Labrador tea (Rhododendron groenlandicum), evergreen huckleberry (Vaccinium ovatum), salal (Gaultheria shallon), Pacific rhododendron (Rhododendron macrophyllum), and California bayberry (Myrica californica). Soil conditions sometimes cause these forests to take on a pygmy form. Lichens and mosses are diverse and can be abundant.

Maritime chaparral

Maritime chaparral is composed of a variety of shrubs that grow in the fog belt. Endemic species of manzanita (Arctostaphylos) and Ceanothus are locally common. Manzanita species include woolyleaf manzanita (Arctostaphylos tomentosa), glossyleaf manzanita (Arctostaphylos nummularia), Hooker's manzanita (Arctostaphylos hookeri), pajaro manzanita (Arctostaphylos pajaroensis), Montara manzanita (Arctostaphylos montaraensis), and others. Gasquet manzanita (Arctostaphylos hispidula) occurs in southern Oregon. Among Ceanothus, hairy ceanothus (Ceanothus oliganthus) is common, while Mason's ceanothus (Ceanothus masonii), Carmel ceanothus (Ceanothus griseus), and wart-stem ceanothus (Ceanothus verrucosus) are local endemics. Other widespread shrubs and trees include chamise (Adenostoma fasciculatum), California buckwheat (Eriogonum fasciculatum), black sage (Salvia mellifera), coffeeberry (Rhamnus californica), buckthorn (Rhamnus crocea), and coast live oak (Quercus agrifolia). This habitat is often found near closed-cone conifer forests and woodlands.

Coastal grassland

Iris douglasiana patch at Point Reyes

Northern coastal grasslands, or coastal prairies, are generally found below 1,000 feet (300 m) on coastal terraces or mountain balds. In areas where fire has been suppressed, coastal scrub plants invade. Common grasses include bentgrass (Agrostis spp.), California brome (Bromus carinatus), Nootka reedgrass (Calamagrostis nutkaensis), California oatgrass (Danthonia californica), red fescue (Festuca rubra), Idaho fescue (Festuca idahoensis), tufted hair-grass (Deschampsia caespitosa), prairie Junegrass (Koeleria macrantha), tall trisetuem (Trisetum canescens). Common forbs include Douglas iris (Iris douglasiana), western blue-eyed grass (Sisyrinchium bellum), hairy gumplant (Grindelia hirsutula), and footsteps of spring (Sanicula arctopoides).

Coastal scrub

Northern coastal scrub consists of shrublands found at elevations below 1,500 feet (460 m) on bluffs, terraces, dunes, and hills near the coast. This habitat is often subject to wind and maritime fog. The shrubs are mostly evergreen, small-leaved, and sclerophyllous. Characteristic species include coyote brush (Baccharis pilularis), yellow bush lupine (Lupinus arboreus), blueblossom (Ceanothus thyrsiflorus), seaside woolly sunflower (Eriophyllum stoechadifolium), sticky monkey-flower (Mimulus aurantiacus), poison oak (Toxicodendron diversilobum), California blackberry (Rubus ursinus), thimbleberry (Rubus parviflorus), salmonberry (Rubus spectabilis), coffeeberry (Rhamnus californica), oceanspray (Holodiscus discolor), salal (Gaultheria shallon), cow parsnip (Heracleum maximum), and western sword fern (Polystichum munitum). Coastal grassland succeeds to coastal scrub in the absence of fire, and coastal scrub succeeds to mixed evergreen forest under further absence of fire.

Riparian woodlands and shrublands

Riparian woodlands and shrublands are a mosaic of tree-dominated plant communities and open shrublands found along rivers. Species composition varies with elevation, slope, floodplain width, and flooding history. Nevertheless, common trees include white alder (Alnus rhombifolia), red alder (Alnus rubra), box elder (Acer negundo), Fremont cottonwood (Populus fremontii), red willow (Salix laevigata), coast Douglas-fir (Pseudotsuga menziesii var. menziesii), California sycamore (Platanus racemosa), coast live oak (Quercus agrifolia), and bigleaf maple (Acer macrophyllum). Common shrubs include sandbar willow (Salix exigua) and arroyo willow (Salix lasiolepis).

Live oak woodlands and savannas

Live oak woodlands and savannas are dominated by coast live oak (Quercus agrifolia). Canopy cover varies from dense forest to open savannas. In forests, California blackberry (Rubus ursinus), creeping snowberry (Symphoricarpos mollis), toyon (Heteromeles arbutifolia), and poison oak (Toxicodendron diversilobum) are common in the understory.

Ponderosa pine forests

Some of the rarest forests that occurs in this coastal region are the Maritime Coast Range Ponderosa Pine forests, an example of which occurs in the Carbonera Creek watershed of Santa Cruz County, California. These forest are dominated by ponderosa pine (Pinus ponderosa).

Operator (computer programming)

From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Operator_(computer_programmin...