Ecology Chapter 9

Question 1

population abundance

Answer 1

total number of individuals -approx. population size

Question 2

population density

Answer 2

number of individuals per unit area

Question 3

how do we measure abundance?

Answer 3

sample is a representative subset of a larger whole(group)

Question 4

Population Method

Answer 4

sampling methods- sampling for absolute abundance

a) area based sampling
b) distance based counts
c) mark recapture method

Question 5

Mark Recapture Method Formula

Answer 5

marked/ total pop size = total # marked (g2)/ total recap #

Question 6

What are population distrubution and abundance limited by?

Answer 6

limited by:

1. habitat suitability (abiotic and biotic)
2. historical factors
3. Dispersal

Question 7

Dispersal

Answer 7

movement of an individual from where it was born

Question 8

Dispersion

Answer 8

where the individuals are placed within the population

Question 9

Dispersion patterns

Answer 9

patterns:

1. clumped
2. uniform
3. random

Question 10

uniform dispersion pattern

Answer 10

caused by territoriality ex. sea birds making nests
……….
………. each bird has approx equal amounts of space
……….

Question 11

What process could cause dispersion patterns

Answer 11

conspecific(s) -individuals of the same species

Question 12

Clumped dispersion

Answer 12

animals gathering around a resource ex. herding, group dynamic, (fence, foraging etc.) clumped around a resource

::: ::: :::
::: :::

Question 13

Random dispersion

Answer 13

not strategically decided by the animals

. . . . .
. . . . . .
. . . .
. . . .