REN R441 Lecture Notes - Lecture 20: Biodegradation, Terrestrial Ecosystem, Soil Conditioner
20 Dec 2017
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Document Summary
Introduction to the www: wonderful world of wetlands. Organic soils form in oxygen-deficient and: water saturated environments, such as wetlands and peatlands from the accumulation of carbonaceous limnic sediments and peat. Wetlands and peatlands: bog, fen swamp marsh, sites of organic soil formation, account for almost 5% of earth"s total land area, great diversity depending on climate, topography, hydrology, and geology. Ombrotrophic bogs: receive mineral nutrition from atmospheric deposition only: acidic, nutrient poor nourished by the air , archive of atmospheric deposition and climate change, oligotrophic. Ombrotrophic vs. minerotrophic: peatlands: bog, fen, swamp, marsh to distinguish, do it based on water chemistry ph, vegetation, ash content. Minerotrophic bogs: neutral, alkaline: mesotrophic to eutrophic, bogs ph4, fen, swamp and marsh ph 7. Swamp: forested wetland and ecosystem at the interface between the atmosphere, lithosphere and hydrosphere. Wetland dynamics and genesis lake-filling fen stage bog: beavers catalyse the development of shallow wetlands when they build dams.
