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首页> 外文期刊>Environmental Management >Stable Isotopes Reveal Nitrogen Loading to Lake Tanganyika from Remote Shoreline Villages
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Stable Isotopes Reveal Nitrogen Loading to Lake Tanganyika from Remote Shoreline Villages

机译：稳定同位素揭示了从偏远海岸线村庄向坦any尼喀湖的氮负荷

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摘要

Access to safe water is an ongoing challenge in rural areas in Tanzania where communities often lack access to improved sanitation. Methods to detect contamination of surface water bodies, such as monitoring nutrient concentrations and bacterial counts, are time consuming and results can be highly variable in space and time. On the northeast shore of Lake Tanganyika, Tanzania, the low population density coupled with the high potential for dilution in the lake necessitates the development of a sensitive method for detecting contamination in order to avoid human health concerns. We investigated the potential use of nitrogen and carbon stable isotopes of snail tissues to detect anthropogenic nutrient loading along the northeast shore of Lake Tanganyika. δ~(15)N of snails was positively related to human population size in the nearest village, but only for villages with ＞4000 inhabitants. The areal footprint of villages within their watershed was also significantly correlated with snail δ~(15)N, while agricultural land use and natural vegetation were not. Dissolved nutrient concentrations were not significantly different between village and reference sites. Our results indicate that nitrogen isotopes provide a sensitive index of local nutrient loading that can be used to monitor contamination of oligotrophic aquatic environments with low surrounding population densities.
机译：在坦桑尼亚的农村地区，获取安全水是一个持续的挑战，那里的社区常常缺乏获得改善的卫生条件的机会。检测地表水体污染的方法（如监测营养物浓度和细菌数量）非常耗时，并且结果在时间和空间上可能存在很大差异。在坦桑尼亚坦Tang尼喀湖的东北岸，人口密度低加上在湖中被稀释的可能性高，因此有必要开发一种灵敏的检测污染物的方法，以避免对人类健康的关注。我们调查了蜗牛组织的氮和碳稳定同位素在探测坦any尼喀湖东北岸沿线人为养分的潜在负荷中的潜在用途。蜗牛的δ〜（15）N与最近村庄的人口规模呈正相关，但仅在人口> 4000的村庄才有。流域内村庄的面积足迹也与蜗牛δ〜（15）N显着相关，而农业土地利用和自然植被却与蜗牛δ〜（15）N无关。村庄和参考地点之间的溶解养分浓度没有显着差异。我们的结果表明，氮同位素提供了局部养分负荷的敏感指数，可用于监测周围人口密度低的贫营养水生环境的污染。

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  • 来源
    《Environmental Management》 |2017年第2期|264-273|共10页
  • 作者

    Brianne Kelly; Emmanuel Mtiti; Peter B. Mclntyre; Yvonne Vadeboncoeur;

  • 作者单位

    Department of Biological Sciences,Wright State University, 3640 Colonel Glenn Highway, Dayton, OH 45435, USA;

    The Jane Goodall Institute, Lake Tanganyika Catchment Reforestation and Education Program, PO Box 1182, Kigoma, Tanzania;

    Center for Limnology, University of Wisconsin, 680 North Park Street, Madison, WI 53706, USA;

    Department of Biological Sciences,Wright State University, 3640 Colonel Glenn Highway, Dayton, OH 45435, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    δ~(15)N; Anthropogenic nutrient loading; Oligotrophic; Lake Tanganyika;

    机译：δ〜（15）N;人为营养负荷;寡养性坦any尼喀湖;

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