Population Ecology

Viruses

Viruses

________ at minimum have: nucleic acid (DNA + RNA) and protein coat (capsid)

Small organisms

________- shorter generation times.

population ecology

study of intraspecific interactions

Principle of allocation

________: "more energy for on function= less energy for other function.

population ecology

the study of intraspecific interactions

intraspecific interactions

organisms interacting with members of the same species in relation to environment

density

the number of individuals per unit area/volume

dispersion

pattern of spacing among individuals in the population

ex

counting the number of oak trees in 100mx100m plots in Troy, then calculate average in the city

Mark-recapture

mark individuals from a sample of the population, release back into the population

3 types of dispersion

clumped, uniform, random

Demography

study of statistics of populations and changes over time

Life tables

age-specific summaries of the survival pattern of a population from birth to death

cohorts

individuals of the same age

reproductive table

based on female cohorts producing offspring from birth to death

Generation time

amount of time between birth of individual vs its offspring

small organisms

shorter generation times

ex

bacteria dividing asexually by binary fission every 20 minutes

large organisms

longer generation times

Viruses at minimum have

nucleic acid(DNA + RNA) and protein coat(capsid)

exponential population growth(r-selected)

populations that have access to abundant resources and reproduce without limits

logistic population growth(k-selected)

populations with limited resources that cause populations to reach a plateau

the plateau in logistic population growth is also called

carrying capacity(K)

semelparity

a single, large reproductive effort

iteroparity

repeated reproduction

life history

traits that affect an organisms schedule of reproduction and survival

r-selected

reproductive success in uncrowded environments

k-selected

life history traits sensitive to population density

"principle of allocation"

more energy for on function = less energy for other function

reproductive diapause

allocation of energy from breeding to migration for survival

density-dependent factors

factors that affect populations as it becomes more dense

density-independent factors

factors that affect population size regardless of number of individuals