Shared Flashcard Set

Details

Test 3
n/a
22
Environmental Studies
Undergraduate 2
10/29/2014

Additional Environmental Studies Flashcards

 


 

Cards

Term
Biological Extinction
Definition
global extinction, gone from the planet
Term
Endangered
Definition
Almost extinct
The genetic diversity would be so low that when the environment changes the species wouldn't be able to stand it.
Term
Ecological Extinction
Definition
The number is so few that the species isn't fulfilling their niche
Term
Threatened
Definition
Population is noticeably declining, but not yet endangered. Still able to be fixed.
Term
Local extinction
Definition
Species not found in area that it used to be found in.
Term
Rate of Extinction + Human influence
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.
Term
Characteristics that make more species vulnerable to premature extinction
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)
Term
Passenger Pigeon Example
Definition
Humans drove to extinction
They liked to nest on top of each other=specialist=easy to kill (shoot)
Millions to zero
Term
HIPPOC
Definition
Habitat Destruction
Invasive Species
Population Size
Pollution
Overharvesting
Climate Change
Term
Habitat Destruction
Definition
Doesn't always have to be destruction, can be habitat fragmentation.
Term
Invasive Species
Definition
1 nonnative species replaces many native species
Term
Population Size
Definition
Human population size-->Everything worse with more people on the planet
Term
Pollution (+example)
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.
Term
Overharvesting
Definition
Taking any organism from the environment.
We only make laws when we have to because of future profits.
Term
Climate Change
Definition
Environments change, but human could've made it more difficult for the environment to catch up.
Term
1973
Definition
Endangered Species Act
Term
1975
Definition
Conventions on International Trade in Endangered Species (CITES)
Term
Identify
Definition
Identifying what is endangered
Term
US Fish and Wildlife
Definition
Terrestrial and fresh water species
Term
National Marine Fisheries Service
Definition
Saltwater species; commercial
Term
Protect/Enforcing
Definition
Most laws would get passed if they would be strictly enforced
Term
Restore-->Improvement/Recovery
Definition
We only improve/recover the things that people will pay money for/to hunt. Because that's where the money comes for.
Supporting users have an ad free experience!