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Peer
review of group presentations

Human impacts on Water as ecosystem processes

Levels of organization of matter

Second law of (energy) thermodynamics

Comparative Energy Efficiency

Simplified Biogeochemical cycles

Energy flow to and from the earth

Freshwater pond ecosystem

Ecosystem of a field

Detritus feeders

Ecosystem structure and function

Range of tolerance for a population of organisms

A food chain

Greatly simplified food web

Generalized model of main one-way flow energy pathways through ecosystems

Energy flow pyramids

Biological magnification