Lecture 8: Metapopulations: plant community composition
Model populations go extinct because of 1) strong density dependence (overshoot+crash) 2)
unstable competition 3) unstable predator prey (disease-host) 4) allee effects at low density.
Don’t go extinct because of 1) nonequilibrial conditions 2) habitat patchiness 3) rescue-by-
migration 4) variation in life history strategy.
Organismal/holistic hypothesis: certain species found together because they’re
biologically integrated and depend on each other’s presence like tissues of an organism. –
Individualistic hypothesis: species are distri