BIOL208 Lecture Notes - Lecture 15: Semelparity And Iteroparity, Cell Division, Programmable Calculator
13 Feb 2018
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Bio 208 lecture 15 monday, february 12, 2018. First two increase populations, latter two decrease populations. Death: could be from old age, disease, lack of resources, predation. Nt+1 = nt + b + i d e. I =immigration: nt+1 = population size in the future (at time + 1 whatever unit of time is being used, nt = population size at time t , b = births, d = deaths, e = emigration. If birth and immigration is higher than death and emigration, population increases. If birth and immigration is lower than death and emigration, population decreases. It is often more useful to understand population changes on a per capita basis, in comparison to the total population size: nt+1 = nt + nt(b + i d e) Abiotic influences on birth and death rates: some sort of correlation between rainfall and finches, more rain, more finches, density independent, as rates were affected by the abiotic factor of rainfall.
