Biology 1 - Mod 7 Populations

studied byStudied by 3 people
0.0(0)
Get a hint
Hint

Population density

1 / 23

flashcard set

Earn XP

Description and Tags

Biology

9th

24 Terms

1

Population density

number of individuals per unit area

New cards
2

Age structure

the number of males and females of each age group that a population contains

New cards
3

Immigration

movement of individuals into an area occupied by an existing population

New cards
4

Emigration

movement of individuals out of an area

New cards
5

Exponential growth

growth pattern in which the individuals in a population reproduce at an increasing rate

New cards
6

Logistic growth

growth pattern in which a populations growth slows and the stops following a period of exponential growth

New cards
7

Carrying capacity

largest number of individuals of a particular species that a particular environment can support

New cards
8

Limiting factor

factor that causes population growth to decrease

New cards
9

Density-dependent limiting factor

limiting factor that depends on population density

New cards
10

Density-independent limiting factor

limiting factor that affects all populations in similar ways regardless of the population density.

New cards
11

Demography

scientific study of human populations

New cards
12

Demographic transition

change in a population from high birth and death rates to low birth and death rates

New cards
13

Biological magnification

Increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web

New cards
14

aquaculture

raising of aquatic organisms for human consumption

New cards
15

ecological footprint

Total amount of functioning ecosystem needed both to provide the resources a human uses and to absorb the wastes that a population generates

New cards
16

ecological hot spot

Small geographic area where a significant number of habitats and species are in immediate danger of extinction

New cards
17

acid rain

precipitation containing nitric and sulfuric acids.

New cards
18

biodiversity

total of the variety of organisms in the biosphere

New cards
19

habitat fragmentation

splitting of ecosystems into pieces

New cards
20

ozone layer

Atmospheric layer in which ozone gas is relatively concentrated; protects life on earth from UV rays in sunlight

New cards
21

genetic diversity

Sum total of all different forms of genetic information carried by a particular species, or by all organisms on Earth

New cards
22

species diversity

number of different species that make up a particular area

New cards
23

smog

gray-brown haze formed by a mixture of chemicals

New cards
24

Sustainable Development

Strategy for using natural resources without depleting them and for providing human needs without causing long-term environmental harm

New cards

Explore top notes

note Note
studied byStudied by 83 people
... ago
5.0(1)
note Note
studied byStudied by 16332 people
... ago
4.9(156)
note Note
studied byStudied by 131 people
... ago
5.0(1)
note Note
studied byStudied by 13 people
... ago
5.0(1)
note Note
studied byStudied by 208 people
... ago
5.0(1)
note Note
studied byStudied by 35 people
... ago
5.0(1)
note Note
studied byStudied by 81 people
... ago
5.0(1)
note Note
studied byStudied by 41100 people
... ago
4.9(218)

Explore top flashcards

flashcards Flashcard (85)
studied byStudied by 3 people
... ago
5.0(1)
flashcards Flashcard (21)
studied byStudied by 13 people
... ago
5.0(1)
flashcards Flashcard (98)
studied byStudied by 26 people
... ago
5.0(1)
flashcards Flashcard (100)
studied byStudied by 10 people
... ago
5.0(1)
flashcards Flashcard (61)
studied byStudied by 6 people
... ago
5.0(1)
flashcards Flashcard (63)
studied byStudied by 7 people
... ago
5.0(1)
flashcards Flashcard (67)
studied byStudied by 25 people
... ago
5.0(1)
flashcards Flashcard (31)
studied byStudied by 5 people
... ago
5.0(1)
robot