EEB365H1 Study Guide - Midterm Guide: Population Viability Analysis, Leslie Matrix, Metapopulation
28 Apr 2016
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If you know the numbers, you may be able to forecast what will happen to the population. Number of individuals in each age group. The same matrix can predict both substantial growth and a substantial decline. Population projections can run to predict the population count for years ahead. Limitations: stage-structured models, ex. cow size-structured models, ex. fish fecundity and survival rates can change with time or population sizes. Lecture 3: population viability analysis [jan 14: demographic deterministic (density dependence) Random variation in birth/death rates: demographic stochasticity (density independence) When population with birth rate = death rate. Regardless of starting numbers, there is always random walk to extinction. Variation is sex ratio magnifies demo stochasiticty. Bad conditions will not prevail everywhere over a large species geographic range. Averaging over space reduces the effect on average birth and death rates. Over a small range, all individuals may be effected by the same environment.
