EcologyHow organisms interact with
each other and their environment.
Ecology – the social movement
Ecosystem EcologyMeasuring
abiotic factors
Chapter 53 -- Population Ecology
Cattle egret
Populations can increase their RANGE
Populations can be large ……
Populations can be small ……
Iriomote Wildcat
Felis iriomotensis
Inhabits only one small Japanese island
The entire habitat for Cyprinodon daibolis.
Devil’s Hole, Death Valley
California Condor(Gymnogyps californianus)
Example: a survivorship curve
Demography
Life History
Salmon spawning migration
Life History
Salmon spawning migration
Reproductive adult plant
Seedling (life history success)
Agave (century plant)
Semelparous organisms
r-selected: Atlantic cod (Gadus)
k-selected: spiny dogfish (Squalus)
r and k selected life history strategies
r
k
k-selected: redwood tree
r-selected: dandelion
r and k selected life history strategies
rk
Fur seal population recovery
Laboratory Demonstration of Exponential Growth
Density Dependent Factors
Density Independent Factors
An exponential curve, still on the up swing
Human population growth