BIOL 1070 Study Guide - Midterm Guide: Species Richness, Oxford University Press, Diversity Index
2 Nov 2016
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Document Summary
Biodiversity- variability among living organisms from all sources including, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems. Three scales of variation: genetic, species, and ecosystem. Abundance- how common a species is in a defined area and can be measured as a percent cover, biomass, or frequency of individuals per species. Abiotic factors- physical and chemical features of an environment. Includes light (radiation), temperature, water (availability, composition, flow), atmospheric gases (including pollution), and soil (nutrients, porosity) Biotic factors- living things that live within and shape an ecosystem. Population- collection of individuals of a single species within a defined area at a specified point in time. Concerns population, size, density, and growth, patterns of dispersion, and age distributions. Community- collection of species living in a given area at a specific point in time. Ecology- relations of organisms to one another and to their physical surroundings.
