ENV100Y5 Chapter 14: ENV100Y5 Chapter :
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ENV100Y5 Full Course Notes
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Community ecology=study of the pattern and processes of species interactions. Autotrophs= organisms that capture solar energy for photosynthesis to produce sugars. Example : green plants, cyanobacteria, algae, chemosynthetic bacteria use the geothermal energy in hot springs or deep-sea vents to produce their food. Detritivores - scavengers waste products or dead bodies. Decomposers - break down leaf litter and other non living material. *energy, biomass and numbers usually decrease at higher trophic levels(most energy is lost through respiration) Exploitation efficiency =i/p,in a prey population(p) some survive and some are eaten(i). Assimilation efficiency = a/i, from the ingested prey some energy is assimilated and some is excreted. Net production efficiency = g/a, some energy lost through respiration, some energy converted to biomass(growth and reproduction =g) Ecological efficiency = energy content of higher trophic level/energy content of lower trophic level. Net production efficiency of ectotherms>endotherms(part of energy budget devoted to thermoregulation.
