Ch 53 Pop Ecology

Question 0

Population

Answer 0

A group of individuals of a single species

Question 1

Population ecology

Answer 1

The study of populations in relation to their environment

Question 2

Density

Answer 2

The number of ind per unit area or volume

Question 3

Dispersion

Answer 3

The pattern of spacing among ind with in the boundaries of the pop

Question 4

Mark recapture method

Answer 4

Ecologists capture one set of a population and mark them. Then return later and sample another random set. Count those already marked

Question 5

Immigration

Answer 5

The influx of new individuals from other areas. This and birth add to a pop

Question 6

Emigration

Answer 6

Th movement of individuals out of a pop. This mad death subtract from a pop.

Question 7

Clumped dispersal

Answer 7

Mos common, associated with mating behavior. Clump where resources are abundant

Question 8

Uniform

Answer 8

Evenly spaced, territoriality

Question 9

Random

Answer 9

Position of each ind is independent of other individuals

Question 10

Demography

Answer 10

The study of the vital statistics of pops and how they change over time

Question 11

Life tables

Answer 11

Age specific summaries of the survival pattern of a population

Question 12

Cohort

Answer 12

A group of ind of the same age from birth until all are dead

Question 13

Survivorship curves

Answer 13

A plot of the reproduction or numbers I’m a cohort still alive at each age

Question 14

Reproductive rates

Answer 14

Ignore males and study females because they produce offspring

Question 15

Reproductive table

Answer 15

An age specific summary of the reproductive rates in a pop

Question 16

Life history

Answer 16

Traits that affect an organism’s schedule of reproduction and survival

Question 17

3 variables of life history

Answer 17

When repro begins
How often the organism reproduces
How many offspring

Question 18

Semelparity or Big Bang repro

Answer 18

One shot pattern, salmon

Question 19

Iteroparity

Answer 19

Repeated repro, contrasts Big Bang repro

Question 20

Trade offs and life history

Answer 20

Time, energy, and nutrients limit repro, trade offs between repro and survival

Question 21

Zero pop growth

Answer 21

dN/dT=rN

R=0 r is whether a pop is growing

Question 22

Exponential growth

Answer 22

dN/dT=rmaxN

Question 23

Carrying capacity, k

Answer 23

The max pop size that a particular environment can sustain

Question 24

Logistic growth

Answer 24

dN/dT=N(k-N)/k

Question 25

K selection

Answer 25

Based on k capacity

Density dependent, mammals

Question 26

R selection

Answer 26

Based on r max

Density independent, mice, fish

Question 27

Ecological footprint

Answer 27

Summarizes the aggregate land and water area required by each person, city, or nation to produce all the resources it consumes and to absorb all the waste it generates