Population Ecology

Front 1

·A population a group of individuals of the _______ speciesthat have the chance of interbreeding

Back 1

same

Front 2

biotic and abiotic factors limitdistribution

Back 2

biotic: predation, competition, parasite, disease

abiotic: chemical(ph) and physical(temp)

Front 3

Population density is thenumber of individual per unit area. three Methods:

Back 3

count/extrapolate, count a proxy (nest, tracks), and mark/recapture

Front 4

threedispersion patterns?

Back 4

Random (position of individuals is independent), uniform(negative interactions such as territorial or resource competition),clumped(resources, defense, social interaction

Front 5

Define exponential growth,dN/dt= rN, and logistic growth,dN/dt= rN(K-N/K).

Back 5

exponential growth:population is increasingexponentially, this never happens over a long period of time

logistic: when apopulation’s growth is indirectly or directly regulated by their own density

Front 6

True/ False

· Conditions for temporary exponential growth: colonizationof new habitat, recovery from a catastrophe, new nutrients, introduced species

· Factors that limit exponential growth: shortages inresource, competitions, predators, disease

Back 6

true

Front 7

K, _______ ________, the maximum pop size an environmentcan support, if N is greater than K then dN/dt is negative and if K > N thendN/dt is positive. The closer N is to K the greater the chance the pop willshrink because it becomes density dependent

Back 7

carrying capacity

Front 8

Density dependent vs.density independent

Back 8

· Density dependent: when birth and death rates change withdensity

· Density independent: when birth and death rates change regardless of density, an example: coldweather