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BIO2129 (133)
Jeremy Kerr (102)
Lecture

BIO2129lecture3.rtf

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Department
Biology
Course
BIO2129
Professor
Jeremy Kerr
Semester
Fall

Description
14092011Lecture 3Dependant variablex axis predictive variablesIndependent variabley axis responsive variablesTotal BiomassBiotic Effects of changes in biomass impact on biotic communities types of species quantity of speciesHistoresis change is difficult to create but even more difficult to reverse recovery pathway isnt the same as the degradation pathwayEx harvestable biomass forestry example of biomass and histeresisex Eutrification can causeoxygen starvation Consequence suffocates fishOxygen will always be dissolved when water is shallow so no oxygen starvation because oxygen is constantly being turned over by things like rocksChanges in biomass can affect biogeochemical processes effects on climatetranspiration by plants cooler climates and more precipitation pump water into the atmosphereeffects on erosion and nutrient concentrations sand sweeps across and undermines vegetationPredicting how biomass responds to environmental gradientsEcosystem FunctionEx oxygenPrimary productivity at local scaleproduction of new organic matter or biomass by autotrophs in an ecosystem 412423CO2 organic matterbase of food webs more there is more useful for other organisms increases life production that can benefit other organismsincreases productivity
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