BSCI 106 Lecture Notes - Lecture 7: Detritivore, Decomposer, Chemotroph
11 Jul 2016
School
Department
Course
Professor
Document Summary
More level, stable curve = higher species diversity. Highest species diversity found in the middle of disturbance frequency scale. Species adaptation and biotic interactions: competition, keystone species. Increase species diversity in a community by reducing species dominance. Ecosystem engineer alters the physical environment and affects other species. Mosses and lichen colonize first, causing soil formation. Equilibrium model of island biogeography maintains that species richness on an ecological island levels off at a dynamic equilibrium point when colonization rate = extinction rate. Species richness is higher on larger islands and nearshore islands. Ecosystem ecology the study of processes involving the transformation and the flux of energy and chemical cycling in habitats. 4 components of an ecosystem: abiotic environment, primary producers, consumers (1 , 2 , decomposers. Nutrient cycling movement of chemical elements through the ecosystem. Energy flow passes one way through the ecosystem. Energy and nutrients travel differently through ecosystem.
