Chapter 19 Flashcards Preview

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Flashcards in Chapter 19 Deck (22):
1

endangered species

as defined in the US Endangered Species Act, a species that is in danger of extinction throughout all or a significant portion of its range

2

equilibrial life history

the pattern of reaching sexual maturity slowly and producing few offspring but caring for the young, often seen in long lived, large bodied species

3

exponential population growth

a model that describes the expansion of a population in an ideal unlimited environment

4

intraspecific competition

competition between individuals of same species for same limited resources

5

invasive species

a non-native species that has spread far beyond the original point of introduction and causes environmental or economic damage by colonizing and dominating suitable habitats

6

life history

the traits that affect an organism's schedule of reproduction and survival

7

population momentum

in a population in which the fertility rate averages two children per female , the continuation of population growth as girls reach their reproductive years

8

Life Table

a table which shows, for each age, what the probability is that a person of that age will die before his or her next birthday

9

Limiting Factors

the environmental factor that is of predominant importance in restricting the size of a population

10

Logistic Population Growth

the growth rate decreases as the population reaches carrying capacity

11

Opportunistic Life History

produce many young as early as possible, and provide no parental care

12

Population

The number of a specific species in a given area

13

Population Density

a measurement of population per unit area or unit; it is a quantity of type number in a given area

14

Survivorship Curve

a graph showing the number or proportion of individuals surviving to each age for a given species or group

15

Threatened Species

any species which are vulnerable to endangerment in the near future

16

Age Structure

The relative number of individuals of each age in a population.

17

Biological Control

The intentional release of a natural enemy to attack a pest population.

18

Carrying Capacity

The maximum population size that a particular environment can sustain.

19

Density-Dependent Factor

A limiting factor whose effects intensify with increasing population density.

20

Density-Independent Factor

A limiting factor whose occurrence and effects are not related to population density.

21

Ecological Footprint

An estimate of the amount of land required to provide the raw materials an individual or population consumes, including food, fuel, water, housing and waste disposal.

22

Population Ecology

The study of how members of a population interact with their environment, focusing on factors that influence population density and growth.