BILD 3 Lecture Notes - Lecture 22: Critical Role, Ozone Depletion, Biomagnification
Document Summary
3/13/17 lecture notes (22) ecosystems and global change. Nutrient cycles: biological and geochemical processes move nutrients between organic and inorganic parts of the ecosystem. Life on earth: depends on the recycling of essential chemical elements, nutrient circuits that cycle matter through an ecosystem. Involve both biotic and abiotic components and are often called biogeochemical cycles: a nutrient cycle. Includes the main resevoirs of elements and the processes that transfer elements between resevoirs: decomposition, detritivores, mainly bacteria and fungi, are essential components of nutrient cycles, by decomposing organic material and returning elements to inorganic resevoirs. Gross and net primary production: total primary production in an ecosystem. Is known as that ecosystem"s gross primary production (gpp), equivalent to total photosynthesis or carbon fixation: net primary production (npp) Is equal to gpp minus the energy used by the primary producers for respiration: only npp. Is the amount of water annually transpired by plants and evaporated from a landscape.
