Redox Stratification and Salinization of Three Kettle Lakes in Southwest Michigan, USA
Redox Stratification and Salinization of Three Kettle Lakes in Southwest Michigan, USA
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美国密歇根州西南部三个水壶湖的氧化还原分层和盐化
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
C. Snyder
中科院分区：
文献类型：
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作者：
C. Koretsky;A. MacLeod;R. Sibert;C. Snyder
氧化还原分层，特别是hypolimnetic缺氧造成的富营养化，和盐渍化造成的道路除冰盐的应用在密歇根州西南部的三个壶湖。其中两个湖（庇护湖和伍兹湖）位于密歇根州的卡拉马祖市，第三个湖（布鲁斯特湖）位于密歇根州的黑斯廷斯市。夏季，这三个湖泊的水柱都呈明显的氧化还原分层，缺氧缺氧，还原性溶质大量积累（例如，Mn（II）、Fe（II）、NH_3 ~-）在湖底沃茨中的含量。与农村布鲁斯特湖相比，城市庇护所和伍兹湖的电导率、氯化物、钠和钾水平极高，这可能是由于在周围流域应用的道路盐除冰剂的径流所致。这些水质的显著变化是令人关注的，因为它们可能会对城市湖泊的湖泊混合，生物多样性和生态系统功能产生负面影响。
Redox stratification, especially hypolimnetic anoxia resulting from eutrophication, and salinization resulting from application of salts for road deicing is investigated in three kettle lakes in southwest Michigan. Two of the lakes (Asylum and Woods Lakes) are located in urban Kalamazoo, Michigan, and the third (Brewster Lake) is located in rural Hastings, Michigan. In summer, the water columns of all three lakes are distinctly redox stratified, with anoxic hypolimnia and significant accumulation of reduced solutes (e.g., Mn(II), Fe(II), ammonia) in the lake bottom waters. Extremely elevated conductivity, chloride, sodium, and potassium levels are observed in the urban Asylum and Woods Lakes compared to the rural Brewster Lake, presumably due to runoff of road salt deicers applied in the surrounding watershed. These significant changes in water quality are of concern because they may detrimentally impact lake mixing, biodiversity, and ecosystem function in the urban lakes.