Ch. 5 Flashcards Preview

Biology (9th Grade) > Ch. 5 > Flashcards

Flashcards in Ch. 5 Deck (20):
1

biodiversity

Number of different species living in a specific area.

2

biological augmentation

Technique of adding essential materials to a degraded ecosystem.

3

biological magnification

Increasing concentration of toxic substances, such as ddt, in organisms as trophic levels increase in food chains or food webs.

4

bioremediation

Technique using living organisms to detoxify a polluted area.

5

ecosystem diversity

Variety of ecosystems in the biosphere.

6

edge effect

Any different environmental condition occurring along an ecosystem's boundaries.

7

endemic

Found only in one specific geographic area.

8

eutrophication

water pollution from nitrogen rich and phosphorus rich substances flowing into waterways, causing algal overgrowth

9

extinction

the disappearance of a species when the last of its members dies

10

genetic diversity

variety of inheritable characteristics or genes in an interbreeding population

11

habitat fragmentation

habitat loss from desperation of an ecosystem into small pieces of land

12

introduced species

nonnative species deliberately or accidentally introduced into a new habitat

13

mass extinction

a large scale dying out of a large percentage of all living organisms in an area within a short time

14

natural resource

any material or organism in the biosphere, including water, soil, fuel, and plants and animals

15

nonrenewable resource

any natural resource available in limited amounts or replaced extremely slowly by natural processes

16

overexploitation

overuse of species with economic value a factor in species extinction

17

renewable resource

any resource replaced by natural processes more quickly than it is consumed

18

species diversity

in a biological community, the number and abundance of different species

19

sustainable use

use of resources at a rate that they can be replaced or recycled

20

background extinction

Gradual process of a species becoming extinct.