Salinization of Alpine rivers during winter months.
Salinization of Alpine rivers during winter months.
复制标题
冬季阿尔卑斯河的盐碱化。
DOI：
10.1007/s11356-020-11077-4
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发表时间：
2021-03
期刊：
影响因子：
--
通讯作者：
Cauvy-Fraunié S
中科院分区：
文献类型：
--
作者：
Niedrist GH;Cañedo-Argüelles M;Cauvy-Fraunié S
人类诱导的（即，次生）盐碱化影响全球水生生物多样性和生态系统功能。虽然农业或资源开采是世界干旱和半干旱地区次生盐渍化的主要驱动因素，但冬季使用除冰道路盐可能是进入寒冷地区淡水的盐的重要来源。高山河流可能受到盐碱化的影响，特别是在人口稠密的山区，尽管这仍有待探索。在这项研究中，我们分析了多年的电导率时间序列，从四条河流在欧洲阿尔卑斯山，并证明了除冰道路盐的应用是链接到峰值河流的盐度水平在冬末/早春。特别是在小集水区与更多的城市表面靠近河流，电导率增加在冬季后期恒定的低流量期间，并与排放比在夏季相关。因此，我们的研究结果表明，小河流高度连接到城市基础设施容易在冬末/早春相当大的盐度峰值。由于阿尔卑斯山河流的自然盐度水平较低，记录的电导率变化可能会对水生生物多样性产生重大影响，并对生态系统功能产生潜在影响。因此，我们敦促研究界评估阿尔卑斯河流次生盐碱化的影响，并呼吁实施管理措施，以防止这些原始和宝贵的生态系统退化。本文的在线版本（10.1007/s11356-020-11077-4）包含补充材料，可供授权用户使用。
Human-induced (i.e., secondary) salinization affects aquatic biodiversity and ecosystem functioning worldwide. While agriculture or resource extraction are the main drivers of secondary salinization in arid and semi-arid regions of the world, the application of deicing road salt in winter can be an important source of salts entering freshwaters in cold regions. Alpine rivers are probably affected by salinization, especially in highly populated mountain regions, although this remains to be explored. In this study, we analyzed multi-year conductance time series from four rivers in the European Alps and demonstrated that the application of deicing road salt is linked to peaking rivers’ salinity levels during late winter/early spring. Especially in small catchments with more urban surfaces close to the rivers, conductance increased during constant low-flow periods in late winter and was less correlated with discharge than in summer. Thus, our results suggest that small rivers highly connected to urban infrastructures are prone to considerable salinity peaks during late winter/early spring. Given the low natural level of salinities in Alpine rivers, the aquatic biodiversity might be significantly affected by the recorded changes in conductance, with potential consequences on ecosystem functioning. Thereby, we urge the research community to assess the impact of secondary salinization in Alpine rivers and call for an implementation of management practices to prevent the degradation of these pristine and valuable ecosystems. The online version of this article (10.1007/s11356-020-11077-4) contains supplementary material, which is available to authorized users.
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