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Chapters17 - CHAPTER 17 A Wildlife and Soils Wildlife Soils...

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CHAPTER 17: Wildlife and Soils A) Wildlife, Soils, and Farmland: 1) Wildlife and soils: a) Features of soils: 1. Broadly classified by textures: a. Gravel = > 2.0 mm b. Sand = 2.0 mm - 0.05 mm c. Silt = 0.05 mm - 0.002 mm d. Clay = < 0.002 mm 2. Relationships between soil and wildlife: a. Indirect: Soil effects something that effects wildlife - soil influences vegetation (cover and food) - Trophy sized big game (minerals in soils) - Stream substrate influences the channel profile b. Direct: Soils direct effect on wildlife - Sidewinder rattlesnakes ( Crotalus cerastes ) - Fossorial animals – need specific soil types - Lead shot (lead poisoning) – in shallow water - Wet clay soils (mud-balls forming on animals) Therefore, good soil maps are helpful for suitable habitat mapping.
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b) Influences of soil on wildlife: 1. Fossorial animals: a. Den excavation b. Frozen soils adaptations 2. Soil mineral content influences wildlife: a. Salt licks influence distribution and movement. Key species influence the availability 3. Crypsis – genetic variation for camouflage.
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