BIOL 121 Lecture Notes - Kluane National Park And Reserve, Isopoda, Fecundity
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BIOL 121 Full Course Notes
Verified Note
44 documents
Document Summary
Population group of individuals of the same species living in the same area ex. *birth rate and death is not affected by density. *death rate increases, birth rate decreases as density increase negative feedback. * intrinsic factors : hormonal change studied in rodents aggressive behavior in rodents, delay in sexual maturation. Fecundity the number of birth of females. Isopods live in decomposing logs, and are prone to desiccation in the summer, and cold in winter. Third year ecology students used mark and recapture methods to estimate the population size of isopods in totem field: density affects their ability to survive because they have less resources available to them in a bigger population. European lizard at lower elevation begin breeding younger than at higher elevation. *increase reproduction may decrease survival and changes of future reproduction. Trade-off between the number of offspring and size of offspring. Boom and bust cycle really steep increase and then really fast death rate.
