BIOL 226 Chapter Notes - Chapter 55: Biomagnification, Transpiration, Primary Production
Document Summary
Write down the 5 key concepts of the chapter: Physical laws govern energy flow and chemical cycling in ecosytems. Energy and other limiting factors control primary production in ecosystems. Energy transfer between trophic levels is typically only 10% efficient. Biological and geochemical processes cycle nutrients between organic and inorganic parts of an ecosystem. Human activities now dominate most chemical cycles on earth. Ecosystem: a biological community and its interactions with the abiotic environment new biomass during a given time period. Gpp: gross primary production, light energy that is converted to chemical energy by photosynthesis. Primary producers: autotrophs that provide the source of all energy for ecosystems and the trophic level that supports all others. Secondary production: the amount of chemical energy in consumer"s food that is converted to their own. Npp: net primary production, biomass available to consumers = gpp respiration of population.