PPt.7: Population Ecologoy Unit 1

Question 1

Groups of actually interbreeding organisms that usually inhabit a specified area
-grow by multiplication

Answer 1

Population

Question 2

Function of ________ by birth and immigration and ________ due to death and emigration

Answer 2

Additions, losses

Question 3

5 factors affecting population growth

Answer 3

1) Death rate of the organism under ideal conditions
2) Number of offspring produced by an organism over its lifetime called fecundity
3) Length of organism’s reproductive life span and ability to conceive
4) The frequency with which organisms reproduce
5) Age of first reproduction

Question 4

Perennials

Answer 4

Iteroparous

Question 5

Annuals

Answer 5

Semelparous

Question 6

Oscillate above and below

-Human population grown exponentially for 2,000 years

Answer 6

Stable limit cycle

Question 7

Type 1:

Answer 7

Low mortality through most of lifespan

Question 8

Type 2:

Answer 8

Constant mortality throughout lifespan

Question 9

Type 3:

Answer 9

High initial mortality, followed by period of much lower. relatively constant losses

Question 10

2 Population Control Factors

Answer 10

1) Density Independent= No greater or lesser effect on an individual
2) Density Dependent= Directly related to population density

Question 11

A struggle for resources which are needed and have a limited supply

Answer 11

Competition

Question 12

Rates will increase as prey densities increase because it will be easier to find the prey`

Answer 12

Predation

Question 13

Greater the population density, the more likely spread of parasites, which must depend on their host

Answer 13

Parasitism and Disease

Question 14

In a closed environment, microbes may produce toxic metabolic wastes that poison them

Answer 14

Self-poisoning

Question 15

If the pressure becomes too severe, some members of the population may leave to avoid the consequences of overcrowding and resource depletion

Answer 15

Emigration