ENV100Y5 Chapter Notes - Chapter 3: Ecosystem Services, Cryosphere, Geosphere

• School: UTM
• Department: Environment
• Course: ENV100Y5
• Professor: Barbara Murck

Document Summary

Hypoxia- deficiency in the amount of oxygen reaching the tissues. Eutrophication-excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen. Network of relationships among parts, elements or components that interact with and influence one another through the exchange of energy, matter or info. Receive inputs of energy, matter of info, process these inputs and produce outputs. Negative feedback loop- a feedback cycle in which output of one type acts as input that moves the system in the opposite direction. The input and output essentially neutralize each other"s effects, stabilizing the system. Positive feedback loop- they drive the system farther towards one extreme or another. Example- erosion, the removal of soil by water or wind / global warming. Rare in nature but made common by humans.