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More resilient eumelanins (dark brown to black) are deposited in hot and humid regions, whereas in arid regions, pheomelanins (reddish to sandy color) predominate due to the benefit of crypsis. Among mammals , there is a marked tendency in equatorial and tropical regions to have a darker skin color than poleward relatives.
Photo of Baugh Creek, Idaho, illustrates how a string of beaver ponds in a barren, post-wildfire landscape, serves as wildlife refugia and potentially as firebreaks. Beaver dam visible at bottom of image. Courtesy of Prof. Joe Wheaton. Beaver and their associated ponds and wetlands may be overlooked as effective wildfire-fighting tools. [71]
Wetland conservation is aimed at protecting and preserving areas of land including marshes, swamps, bogs, and fens that are covered by water seasonally or permanently due to a variety of threats from both natural and anthropogenic hazards. Some examples of these hazards include habitat loss, pollution, and invasive species.
In 1965 the San Luis Resource Area of the Bureau of Land Management began a project to restore some of the dry playas in the San Luis Valley to their former condition as wetlands. [6] The Blanca Wildlife Habitat Area covers almost 10,000 acres (4,000 ha) south of San Luis Lakes and near to the Great Sand Dunes National Park and Preserve.
Wetlands exist on every continent, except Antarctica. [19] The water in wetlands is either freshwater, brackish or saltwater. [18] The main types of wetland are defined based on the dominant plants and the source of the water. For example, marshes are wetlands dominated by emergent herbaceous vegetation such as reeds, cattails and sedges.
Areas of land that are wet by surface water or groundwater for long periods of time so that the animals and plants adapt to them for a part of their lifecycle are considered Wetlands. This includes areas that are inundated with fresh or saline water. Lagoons, lakes, rivers, estuaries, swamps, coral reefs and seagrass beds are examples of ...
A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem. The primary factor that distinguishes wetlands from other land forms or water bodies is the characteristic vegetation of aquatic plants, adapted to the unique hydric soil. Wetlands play a ...
A freshwater swamp forest is a type of wetland ecosystem characterized by its unique hydrology and vegetation. These forests are typically found in low-lying areas, riverbanks, and floodplains where there is a consistent supply of freshwater. [3]