01:119:115 Lecture 26: Lecture 26 - Ecosystem Ecology
31 Jan 2017
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Document Summary
Lecture 26 - ecosystem ecology: ecosystem productivity, producers and consumers. Ecosystem - all the organisms living in a community, as well as the abiotic factors with. Ecosystem dynamics involve two main processes: which they interact. Energy flows through ecosystems, matter cycles within ecosystems. Energy enters an ecosystem as solar radiation (the sun), is conserved, and much is lost from organisms as heat. Trophic levels = positions in the food chain/web. Consumers - obtain energy from plants or animals. Omnivores - eat both plants and animals. Food web = food chains that are linked together. Primary production - light energy converted to chemical energy by autotrophs. Only a small fraction of solar energy actually strikes photosynthetic organisms, and even. Energy available to eat less is of a usable wavelength: gpp. Once we know how much sunlight is captured by primary producers: Gross primary production (gpp) - total primary production - how much energy in. Gpp is conversation of light to: plants/autotrophs.
