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Grasses and woodlands become deserts
Morphological Species Concept
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Species are morphologically distinct/distinguished exclusively by visual
traits as form and structure
Utilitarian Tradition
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Emphasizes sustained use of resources
Gifford Pinchot [first Chief of US Forest Service]
Endocrine Disruptors
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Chemicals that may interfere with the body's endocrine system and
produce adverse developmental, reproductive, neurological, and immune
effects in both humans and wildlife
R-Selected Species
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Fast life history
Wildlife
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Free-ranging vertebrates, especially terrestrial birds and mammals
, "The Land Ethic"
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Stewardship of ecological community
Aldo Leopold
Habitat Degradation and Pollution
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Trash, toxins, chemicals, noise, light, nutrients, etc
Pollution Categories
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1. Classic Pollution: Plastic trash
2. Nutrient Pollution
3. Persistent Pollution: Metals (mercury), DDT
4. Endocrine Disruptors: Herbicides
How is human impact determined?