Midterm #2 Flashcards Preview

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Flashcards in Midterm #2 Deck (28):
1

Population

Group of potentially interbreeding individuals of a single species inhabiting a specific area

2

Populations are determined by _______ between _____ conditions

Interactions
Physiological

3

Ecological filter

Where different species may become established and where they may thrive

4

Population density

Can be absolute density or ecological density

5

Absolute density

Number of individuals of a population per unit area

6

Ecological density

Incorporates concept of niche, # of individuals per unit of suitable habitat

7

Characteristics of population

Death rates, sex rates, immigration, birth rates

8

The __________ limits the geographic distribution of specifies

Physical environment

9

_____ can alter population densities

Dispersal

10

Immigration

Going into a system

11

Emigration

Going out of a system

12

Migration

Seasonal movement of organisms going back and fourth

13

Dispersal

Typically a permanent exodus

14

Expanding populations

Those in the process of increasing their range

15

Metapopulation

Group of sub populations living in patches connected by exchange of individuals

16

Large scale distribution

Individuals in population are clumped

17

Small scale distribution

Individuals within a population In patterns that may be random, regular or clumped

18

Small scale can’t be more than ________

Few hundred meters

19

Random distribution

Individuals have equal probability to occur anywhere

20

Regular distribution

Uniformly spaced through environment

21

Clumped distribution

Find one species there, there will likely to be more

22

Densities decrease with ______ body size of individuals

Increasing

23

Commoners and rarity are influenced by

Population size, geographic range, habitat tolerance

24

Test answer 1

Decrease in concentration gradient

25

Test answer 2

Photosynthesisers

26

Test answer 3

C : N

27

Social monogamy

Song bird female

28

K in k selection

Max population size