環(huán)境微生物學(xué)-文庫(kù)吧
2024-12-19 02:37 本頁(yè)面
【正文】 ellate Noctiluca scintillans at a beach in the Limfjord, Denmark. Photo: Helene Munk S248。rensen, County Board of 197。rhus, Denmark Microcystis aeruginosa bloom in Crawley Bay, SwanCanning Estuary, WA. Photo courtesy of West Australian Newspapers and used with permission of the Waters and Rivers Commission of Western Australia. Eutrophication and Algae Blooms Eutrophication is an increase of phytoplankton biomass and takes place when nutrients, especially nitrogen and phosphorous, are discharged into surface waters. This is natural but men made eutrophication enhances this process with massive consequences. It alters species position and leads to a loss of biodiversity due to a loss of oligotophic systems. Men made eutrophication leads to an overgrow of algaes, a so called algae bloom, which results in scum formation and a reduced transparency of the water. Amongst cutting down the peration of light, these blooms are in some cases even toxic. These consequences do not only reduce the bathing water quality and are a nuisance but they might also be harmful, especially to bathing small children. They also affect the local tourism Eutrophication especially occurs in coastal waters near the shore where a large amount of nutrients are transported by rivers. Blooms of phytoplankton have bee a recurrent problem in the worlds. 。 。
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