ENVS195 Lecture Notes - Lecture 7: Cloud Seeding, Evapotranspiration, Estuary
7 Oct 2016
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Class: envs 195 topic: dynamic ecosystems & matter cycling. Change that arises - feedbacks help to maintain. Positive: continues the change in same direction rare in nature common in natural systems altered by humans ex. Polar amplification: dif types of surfaces reflect solar radiation in different ways. Albito darker in colour , absorbs more light therefore lower albito rate. Then continues to more melting of the ice Negative: pushes system back to where it was before helps stabilize ecosystem overtime. Goes back to the way it was before. Predator and prey relationships increase in prey=increase in predator cycling through ecosystem biological, geo and chemical ways matter moves in cycles also called nutrient cycles. 6 nutrients - hydrogen, oxygen, sulphur, phos. , carbon and. Depends on what kind of ecosystem (eg. comparing soils in. 2 types of cycles temperate vs. tropical forest soils) differs on type of nutrient or season. Residence time: length of time something stays in one compartment.
