CH 53

Question 1

Populations

Answer 1

Individuals of the same spp. that share resources and interbreed

Question 2

Population bio describes

Answer 2

• distribution
• density and growth
• demographics

Question 3

Distribution

Answer 3

Depends on the physical environment, adaptations of organisms, behavior, etc.

Question 4

Types of distribution

Answer 4

• clumped
• uniform
• random

Question 5

Density dependent factors

Answer 5

• cause drop in birth rates or rise in mortality as pop density increases
• act to restrict pop growth

Question 6

Density independent factors

Answer 6

• effects on pop growth are the same regardless of density
• generally abiotic

Question 7

Metapopulations

Answer 7

• linked groups of organisms
• allow for immigration and emigration

Question 8

Demographics

Answer 8

Study of statistics of pop over tuned especially:
- changes in size and composition
- factors that influence change

Question 9

Life history traits

Answer 9

Investments in growth, reproduction , and survivorship
- shaped by natural selection

Question 10

Semelparity

Answer 10

One and done reproduction of many, often unpredictable

Question 11

Iteroparity

Answer 11

• repeated reproduction
• regular production of fewer offspring
• stable environments

Question 12

r-selected opportunists

Answer 12

• well below K and/or unstable environments
• maximize reproductive out put
• lots of offspring early and often
• can become pests

Question 13

K selected equilibrium spp

Answer 13

• close to K and/or stable environments
• longer lived, fewer offspring, more parental involvement

Question 14

Survivorship curve: type 1

Answer 14

Low death rate, many life to old age

Question 15

Survivorship Curve: Type 2

Answer 15

moderate death rate for individuals at all ages

Question 16

Survivorship Curve: type 3

Answer 16

High death rate: many die young, few live to old age