L8 - population ecology part 2

Question 1

what is the equation for exponential growth

Answer 1

Nt = N0e^rt

Question 2

what is the equation for logistic growth?

Answer 2

Nt = K/ 1+ [(k-No)/No]e^-rt

Question 3

what two variables does a survivor ship curve correlate

Answer 3

number of offspring to age of the species

Question 4

what does a type one survivorship curve look like?

Answer 4

high infant and adult survivorship until end end of life
- most dying are old

Question 5

what does type two survivorship curve look like?

Answer 5

mortality is evenly distributed over age and classes
- constant number of deaths over time

Question 6

what does a type three survivorship curve look like?

Answer 6

high juvenile deaths, followed by constant mortality for rest of life span
- high reproduction rates offset high mortality.

Question 7

what is a reproductive value?

Answer 7

reproductive value = present progeny + future expected progeny
changes with age.

Question 8

what is a matrix model?

Answer 8

matrix models use estimates of vital rates at different ages to project future growth.

Question 9

what is a population viability analysis (PVA)

Answer 9

use of a population models to estimate the probability of extinction for populations of different sizes.

Question 10

what is a metapopulation?

Answer 10

A network of semi-isolated populations with some level of regular exchange, immigration, emigration and gene flow.
populations of populations

Question 11

what are the two types of metapopulations?

Answer 11

sources- grow the population and export individuals
Sinks- decline the population and depends on immigration

Question 12

what are the organizational hierarchy of ecology

Answer 12

species < population < communities < ecosystem < biosphere