BIOL 1070 Study Guide - Midterm Guide: Ecosystem Diversity, Abiotic Component, Herbaceous Plant
11 Dec 2016
School
Department
Course
Professor
Document Summary
Complex information needs to be organized into a form that can be accessed (taxonomists do this). Ecosystem: a system formed by the interaction of a community of organisms with their physical environment. Ecosystem diversity includes the variety and relative abundance of species. To measure, we must define what organisms are sampled, the spatial area sampled, and when / how long we sample (time). The number of species per specified collection / sample area or specified number of individuals. Evenness: relative abundance of species in an area. Ecosystem community population individual organ / tissue cell molecules. Ecosystems can also be defined by their population: Unique properties: size = number of individuals (abundance, geographical disturbance = area in which individuals occur, growth (increase or decrease in size) What ecological factors place limits on a specie" geographical range: Correlation between environmental gradients and a species optimum range. What factors limit the tree line: underneath herbaceous canopy. Shaded, competition for water: on bare soil.
