BI111 Lecture Notes - Lecture 9: Semelparity And Iteroparity, Mayfly, Logistic Function
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) Ecologists use experimental or observational data: field or laboratory studies used to test predictions by manipulating variables, data collected about natural experiments do not require manipulations. Sometimes hypotheses framed in mathematical models: allows computer models to simulate natural events and large-scale experiments. Overarching goal of ecology is to understand the causes and consequences of changes of population/community structure. Overall spatial boundaries within which a population lives. Habitat: specific environment in which a population lives, as characterized by its biotic and abiotic features. Marking has no effect on survival or probability of being resampled later. Marked individuals have time to mix with unmarked individuals before second sample. Population is closed : no births, deaths, immigration or emigration. Spatial distribution of individuals within the geographic range.
