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genetic, species, ecological and functional diversity |
Food chain or food web
Each organism is assigned to a feeding level → a trophic level
Each trophic level has an amount of biomass |
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Efficiency: 2-40%, avg 10% |
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mature soils have soil horizons
Surface litter later = O horizon (brown, black) |
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topsoil layer: a horixon. consysts of humus |
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C horizon: above the bedrock |
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infiltration is downward motion of water |
leaching
soil vary in content of flay, silt, sand, gravel → soil texture |
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hydrologic cycle
evaporation
transpiration
condensation
percipitation
infiltration
percolation
runoff |
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How human activity affects cycle? |
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Before exam 2
EnvSc
Lecture 3
Ecosystem 1
Exam & Assignments