population

Question 1

why does age structure have a profound effect on population growth?

Answer 1

reproductive capacity varies with age

Question 2

What is a clumped dispersion pattern

Answer 2

If you find an individual in one location, there is a higher probability of finding an individual in a neighbouring region

Question 3

What is a regular dispersion pattern?

Answer 3

If you find an individual in one location, there is a lower probability of finding an individual in a neighbouring region

Question 4

What is a random dispersion pattern?

Answer 4

Equal probability of finding an individual at any point within the region

Question 5

Spatial variation in environmental conditions strongly influence

Answer 5

dispersion patterns

Question 6

give an example of interactions which promote clumped dispersion patterns

Answer 6

social lives

Question 7

give an example of interactions which promote regular dispersion patterns

Answer 7

food, space and mate competition

Question 8

What are demographic eveents?

Answer 8

pop = births - deaths + immigration - emigration

Question 9

What can be used to determine growth rates and keep track of demographic factors?

Answer 9

Life table

Question 10

A cohort table follows _

Answer 10

Individuals of a species born in the same rime frame across entire llife span

Question 11

Horizontal life tables follow _

Answer 11

species across lifespan

Question 12

Vertical life tables look at _

Answer 12

a sample of a population at a single time

Question 13

What does the fecundity schedule keep track of?

Answer 13

number of offspring produced by females within given timespan

Question 14

age dependant tables look _

Answer 14

across discrete calendar time frames

Question 15

stage dependant tables look _

Answer 15

at important stages in organisms life cycle

Question 16

Describe type 1 survivorship curve

Answer 16

high parental care, high adult survivorship, lower fecundity

Question 17

Describe type 2 survivorship curve

Answer 17

constant survivorship throughout lifespan

Question 18

Describe type 3 survivorship curve

Answer 18

low juvenile survivorship, low parental care, high fecundity

Question 19

What is an organisms life history strategy?

Answer 19

How it allocates resources to be put towards growth, maintenance and reproduction

Question 20

what is r

Answer 20

intrinsic growth rate

Question 21

which life history traits are influenced by environmental conditions the most?

Answer 21

age of first reproduction
number of broods per female
number of offspring per brood

Question 22

semelparous organisms

Answer 22

reproduce only once per lifespan

Question 23

iteroparous organisms

Answer 23

reproduce multiple times over lifespan

Question 24

what is the big bang in semelparous organisms?

Answer 24

Large number of offspring produced per brood (only one)

Question 25

What effect can select for early and frequent reproduction?

Answer 25

Predation

Question 26

the carrying capacity k represents

Answer 26

the maximum number of individuals that can be sustained by the resources within an environment

Question 27

what kind of growth does a carrying capacity cause?

Answer 27

logistic growth

Question 28

give 3 density dependant factors which limit pop growth

Answer 28

predation food supply pathogens

Question 29

give a density independent factor

Answer 29

extreme weather conditions

Question 30

unpredictable habitats are associated with

Answer 30

high fecundity and high r

Question 31

predictable habitats are associated with

Answer 31

low fecundity/r, high probability of reproductive success

Question 32

r-strategists employ strategies which

Answer 32

allow for high intrinsic growth rates

Question 33

k-strategists employ strategies which allow for

Answer 33

persistence near carrying capacities

Question 34

species that use abundant resources _

Answer 34

reach higher population densities

Question 35

species with smaller body sizes _

Answer 35

reach higher population densities

Question 36

species which have complex social organisations _

Answer 36

reach high population densities

Question 37

species newly introduced to a region can _

Answer 37

reach higher population densities

Question 38

organisms live in distinct habitat _

Answer 38

patches

Question 39

a _population may be divided in to _populations

Answer 39

metapopulations | sub populations

Question 40

What is the rescue effect?

Answer 40

when migration of individuals between subpopulations can inhibit extinction

Question 41

Connections between habitat patches are known as _

Answer 41

corridors

Question 42

what is biological control?

Answer 42

the use of predators/pathogens to control problematic species