BIL 330 Lecture Notes - Lecture 30: Ecological Pyramid, Chemosynthesis, Primary Production
Document Summary
Trophic pyramid: a chart composed of stacked rectangles representing the amount of energy (i. e. , pyramid of energy) or biomass (i. e. , pyramid of biomass) in each trophic group: in terrestrial systems, pyramids of biomass and energy look similar. Primary productivity: the rate at which solar or chemical energy is captured and converted into chemical bonds by photosynthesis or chemosynthesis. Most energy that moves through ecosystems originates as solar energy that powers photosynthesis. Where sunlight is not available (e. g. , deep ocean thermal vents), producers rely on chemosynthesis as their source of energy. Producers: - harness energy and form the basis of food webs use energy for respiration, growth, and reproduction. The energy used for growth and reproduction is the energy available to consumers. Standing crop: the biomass of producers present in a given area of an ecosystem at a particular moment in time.
