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Biology 2f03 Lecture 2.docx

2 Pages

Earth Sciences
Course Code
David Goutor

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Life on Land Why horses and cattle help restore Guanacaste forest of Costa Rica?  Provides shade, food  Introduced cattle Recall (1 year) : climate dfines biomes, the “shape” of vegetation Soils in turn greatly affect other aspects (roots, water, nutrients,..) Soils typically form layers (horizons_ reflecting a range of physical and biological processes: Types of Horizons O- Organic - litter on top, fine litter deeper soil and living creatures, branches. Leaves as you move deeper it will be more fragmented chopped. A – Mineral Soil Some organic matter. Clay, iron, aluminum silcates and soluble organics leach out gradually. B – Depositional. Materials leached from A settle in B. Deposits
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