BI111 Lecture Notes - Lecture 10: Semelparity And Iteroparity, Logistic Function, Guppy
Document Summary
Ecologists study levels of organization ranging from individual organisms to the biosphere. Study of the interactions between organisms (biotic) and their environments (abiotic) Field or laboratory studies used to test predications by manipulating variables. Data collected about "natural experiments" do not require manipulations. Allows computer models to stimulate natural events and large-scale experiments. Overarching goal of ecology is to understand the causes and consequences of changes of population/community structure. Habitat: specific environment in which a population lives, as characterized by its biotic and abiotic features. Mark-recapture methodology is one solution **will be on final. Capture a random sample of individuals (n1) that are marked. Capture a second random sample of individuals (n2), some of whom are marked (n2m) Calculate initial population size (x) using the formula n1/ x=n2m/n2. Marking has no effect on survival or probability of being resampled later. Marked individuals have time to mix with unmarked individuals before second sample.
