EEMB 142A Study Guide - Midterm Guide: Macrocystis Pyrifera, Marine Life Protection Act, Intermediate Disturbance Hypothesis
Document Summary
Two kinds of populations: demographically closed- only changing size because of local births and deaths, demographically open- local births and deaths plus movement of individuals. Typical life cycle in a marine community. Larvae(planktonic dispersal) new recruits(settlement & metamorphosis) adult(growth and maturity) Metapopulation structure that aids in the maintenance of biodiversity: marine species diversity (2 components, species richness- number of different species present, species evenness- distribution of relative abundance among the species. Depends on the influence of interspecific competition. Highly competitive species should drive less competitive species to extinction. Interspecific competition tends to act to reduce species diversity. Factors preventing superior competitors from excluding inferior ones help maintain diversity. Niche- set of all environmental features within which a species can survive, grow and reproduce. Dimensions can be anything depth, temperature, salinity, diet etc. Niche breadth- range of conditions within which a species can survive and reproduce. Generalists have large ranges and specialist and specific ranges.
