Other species of concern that might be considered in an ERA include keystone species —species whose presence dramatically alters the structure and dynamics of ecological systems—and susceptible species. Ecological receptors are considered susceptible when they are sensitive to a stressor to which they are or may be exposed. For example, a mammal such as a mink could be selected as a receptor for a bioaccumulative stressor bioaccumulative stressor Any physical, chemical, or biological entity that can induce an adverse response synonymous with agent that has an increase in concentration in the biological organism over time.
Information and data sources are available to assist with identifying potential threatened and endangered species to use as receptors in an ERA. Please note that many resources from private organizations also provide species lists, but are not included in the tool table below. The resources compiled here are generally limited to freely available resources from U. In addition to the tools shown below, there are many available sources of information and data related to the fate and transport of contaminants in environmental media and the transfer of contaminants from an environmental medium to receptor.
See the Chemical module of the Stressors Tool Set for information and tools on fate and transport related to chemical stressors. See the Food Chains and Webs module of the Exposure Pathways Media Tool Set for information, data sources, and modeling tools available to help in the evaluation of food chain and food web contaminant transfers in an ERA. Skip to main content. EPA EcoBox. The list of New Jersey's endangered and threatened nongame wildlife species are maintained by the Division of Fish and Wildlife's Endangered and Nongame Species Program.
These lists are used to determine protection and management actions necessary to ensure the survival of the state's endangered and nongame wildlife. Applies to a species whose prospects for survival within the state are in immediate danger due to one or several factors, such as loss or degradation of habitat, over-exploitation, predation, competition, disease or environmental pollution, etc.
An endangered species likely requires immediate action to avoid extinction within NJ. Applies to species that may become endangered if conditions surrounding it begin to or continue to deteriorate. USGS biologists are leading the monitoring and reintroduction effort of the Southern California mountain yellow-legged frog -- federally listed as endangered with only wild adults remaining in the mountains surrounding Los Angeles County. The Colorado River basin supports one of the most distinctive fish communities in North America, including the federally endangered humpback chub Gila cypha.
The number Grand. Skip to main content. Search Search. Biology and Ecosystems. Apply Filter. This is an issue of great concern, as these populations are already struggling to survive in the current environment. If some of these species are more vulnerable to fatal WNV infection, WNV may ultimately lead to their extinction or significantly set back the progress of the recovery programs.
Where are salmon most endangered? Certain populations of sockeye salmon, coho salmon, chinook salmon, and Atlantic salmon are listed as endangered. Sockeye salmon from the Snake River system are probably the most endangered salmon. Coho salmon in the lower Columbia River may already be extinct. Salmon are not endangered worldwide. For example, most populations in Alaska are Are salmon endangered worldwide? No, salmon are not endangered worldwide.
For example, most populations in Alaska are healthy. Some populations in the Pacific Northwest are much healthier than others. These healthy populations usually occupy protected habitats such as the Hanford Reach on the Columbia River and streams of Olympic National Park.
Learn more: Questions and Answers What species of bats are affected by White-nose Syndrome? White-nose Syndrome mostly affects hibernating bats. More than half of the 47 bat species living in the United States and Canada hibernate to survive the winter. Twelve bat species, including two endangered species and one threatened species, have been confirmed with white-nose syndrome in North America. The causative fungus, Pseudogymnoascus Why do animals and plants become endangered?
Although extinctions occur naturally, the current rate of plant and animal extinctions is much higher than the natural or historical rates. Habitat loss is the primary cause of higher extinction rates. Other causes include habitat changes, over-exploitation of wildlife for commercial purposes, the introduction of harmful nonnative species, Filter Total Items: 7.
Year Published: U. Reichert, Brian E. View Citation. We all depend upon plants and wildlife. From studying them, we have learned new ways of growing food, making clothing, and building houses. Scientists have discovered how to use certain plants and animals as medicine. If we fail to protect threatened or endangered species, we will never know how they might have improved our lives. Endangered and threatened species need our help. Government agencies, such as the U. Environmental Protection Agency, the U.
Department of. Agriculture , the U. Fish and Wildlife Service , NOAA's National Marine Fisheries Service , and the National Park Service , along with state fish and wildlife agencies and private groups are making information available so people can better protect endangered and threatened species and their habitats.
You can contact these agencies for information and join the challenge in helping to protect endangered and threatened species, and all wildlife, from extinction.
Skip to main content. Endangered Species. Contact Us. Learn more about Threatened and Endangered Species. What Are Endangered and Threatened Species? For Kids.
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