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首页> 外文期刊>Harmful Algae >Land use patterns, ecoregion, and microcystin relationships in U.S. lakes and reservoirs: A preliminary evaluation
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Land use patterns, ecoregion, and microcystin relationships in U.S. lakes and reservoirs: A preliminary evaluation

机译：美国湖泊和水库的土地利用模式，生态区和微囊藻毒素关系：初步评估

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摘要

A statistically significant association was found between the concentration of total microcystin, a common class of cyanotoxins, in surface waters of lakes and reservoirs in the continental U.S. with watershed land use using data from 1156 water bodies sampled between May and October 2007 as part of the USEPA National Lakes Assessment. Nearly two thirds (65.8%) of the samples with microcystin concentrations ≥1.0 μg/L (n = 126) were limited to three nutrient and water quality-based ecoregions (Corn Belt and Northern Great Plains, Mostly Glaciated Dairy Region, South Central Cultivated Great Plains) in watersheds with strong agricultural influence, canonical correlation analysis (CCA) indicated that both microcystin concentrations and cyanobacteria abundance were positively correlated with total nitrogen, dissolved organic carbon, and temperature; correlations with total phosphorus and water clarity were not as strong. This study supports a number of regional lake studies that suggest that land use practices are related to cyanobacteria abundance, and extends the potential impacts of agricultural land use in watersheds to include the production of cvanotoxins in lakes.
机译：使用2007年5月至2007年10月之间采样的1156个水体的数据，发现美国大陆湖泊和水库地表水总微囊藻毒素（一种常见的蓝毒素）的浓度与流域土地利用之间的统计意义上的显着联系。 USEPA国家湖泊评估。微囊藻毒素浓度≥1.0μg/ L（n = 126）的样本中，近三分之二（65.8％）被限制在三个以养分和水质为基础的生态区域（玉米带和北部大平原，大部分为冰川乳业地区，中南部耕种地区）典型的农业流域的大平原地区，典型相关分析（CCA）表明，微囊藻毒素浓度和蓝细菌丰度与总氮，溶解有机碳和温度均呈正相关；与总磷和水净度的相关性不那么强。这项研究支持了许多区域性湖泊研究，这些研究表明土地利用方式与蓝细菌的丰度有关，并将农业土地利用在流域中的潜在影响扩展到了湖泊中植物毒素的生产。

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  • 来源
    《Harmful Algae》 |2014年第6期|57-62|共6页
  • 作者

    John R. Beaver; Erin E. Manis; Keith A. Loftin; Jennifer L. Graham; Amina I. Pollard; Richard M. Mitchell;

  • 作者单位

    BSA Environmental Services Inc., 23400 Mercantile Road, Suite 8, Beachwood, OH 44122, USA;

    BSA Environmental Services Inc., 23400 Mercantile Road, Suite 8, Beachwood, OH 44122, USA;

    U.S. Geological Survey, Kansas Water Science Center, 4821 Quail Crest Place, Lawrence, KS 66049, USA;

    U.S. Geological Survey, Kansas Water Science Center, 4821 Quail Crest Place, Lawrence, KS 66049, USA;

    U.S. Environmental Protection Agency, Office of Wetlands, Oceans, and Watersheds, 1200 Pennsylvania Avenue (4503-T), Washington, DC 20460-0001, USA;

    U.S. Environmental Protection Agency, Office of Wetlands, Oceans, and Watersheds, 1200 Pennsylvania Avenue (4503-T), Washington, DC 20460-0001, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cyanobacteria; Ecoregion; Lake; Land use; Microcystin; Reservoir;

    机译：蓝细菌;生态区湖;土地利用;微囊藻毒素水库;

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