09 Wetlands - Wetlands Bog formation 1 A lake or pond forms...

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1 Wetlands Bog formation 1. A lake or pond forms in a depressional area Bog formation 2. Aquatic life grows Bog formation 3. Organic rich sediments accumulate Bog formation 4. Sedimentation continues Bog formation 5. Surface waters are replaced by wetlands
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2 Wetlands Wetlands are among the most productive ecosystems on earth. Habitat for: Birds, migratory waterfowl, mammals reptiles, amphibians, fish Sinks for: C, N, P, and S Wetlands Wetlands are important for natural environmental cleanup. Problems with wetlands: Wetlands Wetlands are important for natural environmental cleanup. Problems with wetlands: Too shallow for boating. Too deep for wading or for land vehicles. Thought of as wastelands in need of reclamation. Often reclaimed by draining or filling. Bog formation A water table exists where there was once a lake or pond Muck farm development Surface drainage of a bog lowers the water table and allows production of crops Organic soil subsidence Surface elevation of the soil decreases as microbes oxidize the soil organic matter
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