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首页> 外文期刊>Environmental Processes >Riparian Buffer Zone and Whole Watershed Influences on River Water Quality: Implications for Ecosystem Services near Megacities
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Riparian Buffer Zone and Whole Watershed Influences on River Water Quality: Implications for Ecosystem Services near Megacities

机译：河岸缓冲区和整个流域对河水水质的影响：对特大城市附近生态系统服务的影响

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摘要

Water quality is one of the most altered ecosystem services in watersheds at the periphery of megacities, where point sources and non-point sources of pollution derived from domestic and agricultural activities are in many cases not well regulated. Despite widespread needs for information, riparian ecosystem service management of megacities in developing countries is largely absent from the literature. To begin to understand connections between surface water quality and landscape factors (i.e. land use and topography), we examined physicochemical and biological properties of water quality at 37 sub-watersheds of the Guadalupe Dam Watershed (GDW) that lies to the northwest of Mexico City. The influences on water quality of sub-watershed versus riparian zone at 50, 100 and 200 m were compared. We applied multiple linear regressions and redundancy analysis. The latter was also used to partition the variance explained by topography (i.e. elevation and slope), land use, and their combined variation. Our results showed that elevation had the greatest influence on water quality, likely because it represents a gradient of urban influence and consequently environmental pollution. Agriculture was not a dominant predictor of water quality, and its direct impacts were somewhat masked given the interaction with other land uses and landscape factors. The shared variation of topography and land use exerted more influence on water quality than either alone, showing that topographic factors constrain certain human activities in the area. Landscape factors accounted for more variation (52 %) at 100 m of riparian zone, giving new information important for the management of riparian ecosystems. Our findings are a step forward in the understanding of the effects of human activities and natural landscape features in providing water of good quality. They will also assist natural resource managers in the challenge of managing water-related ecosystem services through scientifically-based management actions and policies, a gap faced by regulatory authorities of megacities in the developing world.
机译：在大城市周边的流域，水质是变化最大的生态系统服务之一，在许多情况下，在这些情况下，来自家庭和农业活动的点源和面源污染都没有得到很好的管理。尽管对信息的需求广泛，但文献中基本上没有对发展中国家大城市的河岸生态系统服务进行管理。为了开始了解地表水质量与景观因素（即土地利用和地形）之间的联系，我们检查了位于墨西哥城西北部的瓜达卢佩大坝流域（GDW）的37个子流域的水质的物理化学和生物学特性。 。比较了50 m，100 m和200 m对小流域与河岸带水质的影响。我们应用了多个线性回归和冗余分析。后者还用于划分由地形（即海拔和坡度），土地利用及其组合变化解释的方差。我们的研究结果表明，海拔对水质的影响最大，可能是因为海拔代表了城市影响的梯度，因此也造成了环境污染。农业并不是水质的主要预测指标，考虑到与其他土地利用和景观因素的相互作用，农业的直接影响在一定程度上被掩盖了。地形和土地利用的共同变化对水质量的影响比任何一个都更大，这表明地形因素限制了该地区某些人类活动。在河岸带100 m处，景观因素造成的变化更大（52％），为管理河岸带生态系统提供了重要的新信息。我们的发现是在理解人类活动和自然景观对提供优质水的影响方面迈出的一步。他们还将通过基于科学的管理行动和政策，协助自然资源管理者应对与水相关的生态系统服务的管理挑战，这是发展中国家大城市监管机构所面临的空白。

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  • 来源
    《Environmental Processes》 |2016年第2期|277-305|共29页
  • 作者

    Mariana Z. Nava-Lopez; Stewart A. W. Diemont; Myrna Hall; Victor Avila-Akerberg;

  • 作者单位

    Graduate Program in Environmental Science, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA;

    Department of Environmental and Forest Biology, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA;

    Department of Environmental Studies, State University of New York, College of Environmental Science and Forestry, 1 Forestry Drive, Syracuse, NY 13210, USA;

    Institute de Ciencias Agropecuarias y Rurales, Universidad Autonoma del Estado de Mexico, Carretera Toluca - Atlacomulco Km. 14.5, CP 50000 Toluca, Mexico;

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  • 正文语种 eng
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  • 关键词

    Water quality; Land use; Riparian zone; Mexico City; Topography; Ecosystem services;

    机译：水质;土地利用;河岸带;墨西哥城;地形;生态系统服务;

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