Create an account
species no longer found in an area that it once inhabited but can be found elsewhere in world
so few members of a species are left that it can no longer play its ecological role
so few individual survivors that species could soon become extinct over most of its natural range
abundant in natural range but because of declining numbers it is likely to become endangered in near future
world-wide list of endangered/threatened species put out by International Union for the Conservation of Nature and Natural Resources (IUCN)
90% destruction of habitat will cause loss of about 50% of the species in that area
Theory of Island Biogeography
biodiversity is based on size of habitat island as well as proximity of the island to the nearest larger habitat area
wildlife tourism where people pay to study, learn about, and observe natural environments
large continuous area of habitat is reduced in area and divided into smaller, more scattered, and isolated patches or "habitat islands"
harmful ecological and economic effects from the presence of accidentally or deliberately introduced species into ecosystems
increase in concentration of persistent chemicals (heavy metals or fat-soluble pesticides) in successively higher trophic levels of a food chain or web
wild animals being hunted by local people, frequently illegally, for food or to supply restaurants
Convention on International Trade in Endangered Species; international agreement between 175 governments that aims to ensure that international trade in specimens of wild animals and plants does not threaten their survival
Convention on Biological Diversity; agreement by 188 countries to reverse decline in biological diversity; prevent/control spread of ecologically harmful invasive species; landmark internation law since it focuses on ecosystems rather than individual species
Endangered Species Act (1973); US law making it illegal to hunt, harass, uproot, harm any threatened or endangered species
National Marine Fisheries Service; federal agency responsible for listing endangered and threatened ocean species as part of the ESA
US Fish and Wildlife Service; federal agency responsible for listing endangered and threatened all species other than ocean species as part of the ESA
Habitat Conservation Plan; amendment to the ESA in 1982 which allows secretary of interior to strike a compromise between landowners and the threatened/endangered species by allowing destruction of some critical habitat in exchange for taking steps to protect members of that species
Gene / Seed Banks
protects and preserves genetic diversity of plant species by storing seeds in refrigerated, low-humidity environments
technique for preserving endangered species; collecting wild eggs and hatching them in research centers or zoos
technique for preserving endangered species; some or all of wild individuals are captured for breeding in capativity and hopefully reintroduced to the wild
Please allow access to your computer’s microphone to use Voice Recording.
Having trouble? Click here for help.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!Reload
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Please upgrade Flash or install Chrome
to use Voice Recording.
For more help, see our troubleshooting page.
Your microphone is muted
For help fixing this issue, see this FAQ.
Star this term
You can study starred terms together