EBIO 1220 Study Guide - Final Guide: Tropical Rainforest, Herbivore, De Havilland Venom
30 Oct 2014
School
Department
Course
Professor
Document Summary
Ecosystems: the sum of all organisms living within a boundary and all the abiotic factors with which they interact. Energy cannot be recycled constant source of power is the sun. Energy flows through an ecosystem, entering as light and. Limitations on primary production in ecosystems exiting as heat: primary production: amount of light energy converted into chemical energy (organic compounds) by autotrophs during a given time period. Ecosystem"s energy budget depends on primary production. Only 1% of the visible light reaching photosynthetic organisms is converted into chemical energy: limitations. Gross primary production (gpp): ecosystem"s total primary production. Net primary production (npp): is gpp minus energy used by primary producers for respiration. Expressed as energy per unit area per unit time (j/m2*yr); biomass per unit area per unit time (g/m2*yr) Only npp is available to consumers: ecosystems vary greatly in npp. Algal beds and reefs, tropical rain forests and wetlands have the highest npp but only occupy a small percentage of.
