BIO 2129 Lecture Notes - Drug Tolerance, Trophic Cascade, Prairie Dog
Document Summary
Biotic effects of changes in biomass (impact on biotic communities): types of species, quantity of species. Historesis: change is difficult to create but even more difficult to reverse (recovery pathway isn"t the same as the degradation pathway) Ex. harvestable biomass (forestry) example of biomass and histeresis ex. Oxygen will always be dissolved when water is shallow so no oxygen starvation (because oxygen is constantly being turned over by things like rocks) Changes in biomass can affect biogeochemical processes: effects on climate transpiration by plants (cooler climates, and more precipitation) pump water into the atmosphere effects on erosion and nutrient concentrations (sand sweeps across and undermines vegetation) Primary productivity at local scale production of new organic matter, or biomass, by autotrophs in an ecosystem (412-423) Co2--> organic matter base of food webs, more there is more useful for other organisms( increases life production that can benefit other organisms) increases productivity tied to availability of primary production.
