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Definition
global extinction, gone from the planet |
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Term
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Definition
Almost extinct The genetic diversity would be so low that when the environment changes the species wouldn't be able to stand it. |
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Definition
The number is so few that the species isn't fulfilling their niche |
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Definition
Population is noticeably declining, but not yet endangered. Still able to be fixed. |
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Term
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Definition
Species not found in area that it used to be found in. |
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Rate of Extinction + Human influence |
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Definition
0.1%-1.0% of all species goes extinct per year. Don't know what it would be without human influence, but probably 10x slower. Nature will "replace" the organism that left the niche open, but we don't know if nature can speed it up to accommodate human influence. |
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Term
Characteristics that make more species vulnerable to premature extinction |
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Definition
1) K-selected species, having a low "r" 2) Being a specialist 3) Having a narrow distribution (ie: horseshoe crabs being found in only 2 locations on Earth) 4) Being an upper level consumer 5) Having a fixed migration rate (ie: Ducks going up/down coast and not having wetlands=bad) 6) Having a commercial value ($ for humans) |
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Term
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Humans drove to extinction They liked to nest on top of each other=specialist=easy to kill (shoot) Millions to zero |
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Term
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Definition
Habitat Destruction Invasive Species Population Size Pollution Overharvesting Climate Change |
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Definition
Doesn't always have to be destruction, can be habitat fragmentation. |
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1 nonnative species replaces many native species |
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Human population size-->Everything worse with more people on the planet |
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Definition
Ex. Runoff with pesticide DDT used on crops in the 60s but banned in the 70s. Made thinner shells for bird eggs, causing the population of birds to drastically drop due to low birth rates. |
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Term
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Definition
Taking any organism from the environment. We only make laws when we have to because of future profits. |
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Definition
Environments change, but human could've made it more difficult for the environment to catch up. |
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Definition
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Term
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Conventions on International Trade in Endangered Species (CITES) |
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Term
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Definition
Identifying what is endangered |
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Term
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Definition
Terrestrial and fresh water species |
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National Marine Fisheries Service |
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Definition
Saltwater species; commercial |
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Term
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Definition
Most laws would get passed if they would be strictly enforced |
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Term
Restore-->Improvement/Recovery |
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Definition
We only improve/recover the things that people will pay money for/to hunt. Because that's where the money comes for. |
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