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| Biological magnification |
| Two types of response to pollutants. |
| Generalized pyramids of numbers in ecosystems |
| Generalized pyramids of biomass in ecosystems |
| Greatly simplified carbon cycle diagram |
| Greatly simplified nitrogen cycle |
| Greatly simplified phosphorous cycle |
| Precipitation-Temperature factors in ecosystems |
| Biomes as Fn(latitude & elevation) |
| Some effects of environmental stress |
| Population Growth and Decrease factors |
| Three generalized types of survivorship curves |
| J-shaped curve of population growth |
| Population crash |
| Secondary ecological succession |
| Ecosystem Characteristics of Immature and Mature Stages of Ecological Succession |
| Comparison of a Natural
Ecosystem and a Simplified Human System Natural Ecosystem Simplified Human system (marsh grassland, forest) (cornfield, factory house) |
| All too brief American Environmental History |
| Environmentalism defined |
| Manifest Destiny |
| American Environmentalism; part 1 |
| American Environmentalism; part 2 |
| Ralph Waldo Emerson |