Biodiversity: Patterns & Threats Flashcards Preview

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Flashcards in Biodiversity: Patterns & Threats Deck (14)
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1
Q

biodiversity

A

life diversity

- levels: genetic diversity, species diversity & ecosystem diversity

2
Q

genetic diversity

A

genes or alleles diversity in a population, species, or group of species

3
Q

species diversity

A

variety & relative abundance of the species present in a given ecological community

4
Q

ecosystem diversity

A

variety of biotic components in a region along w/ abiotic components

(ie) soil, water & nutrients

5
Q

ecosystem function

A

sum of biological & chemical processes that are characteristic of a given ecosystem

(ie) primary production, nitrogen cycling & carbon storage

6
Q

endemic species

A

species that lives in one geographic area & nowhere else

7
Q

biodiversity hot spot

A

region rich in species

8
Q

endangered species

A

species whose #s have decreased so much that it is in danger of extinction throughout all or part of its range

9
Q

habitat destruction

A

human-caused destruction of a natural habitat

- replaced by an urban, suburban, or agricultural landscape

10
Q

habitat degradation

A

reduction of habitat quality

11
Q

habitat fragmentation

A

breakup of a large region of a habitat into smaller regions, separated from others by a different habitat

12
Q

biomass

A

total mass of all orgs in a given population or geographical area
- usually expressed as total dry weight

13
Q

overexploitation

A

unsustainable removal of wildlife from natural environment for human use

14
Q

species-area relationships

A

mathematical relationship btwn area of a certain habitat & number of species that it can support