IMPORTANCE OF SURFACE-SUBSURFACE EXCHANGE IN STREAM ECOSYSTEMS - THE HYPORHEIC ZONE
IMPORTANCE OF SURFACE-SUBSURFACE EXCHANGE IN STREAM ECOSYSTEMS - THE HYPORHEIC ZONE
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DOI：
10.4319/lo.1995.40.1.0159
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发表时间：
1995-01-01
影响因子：
4.5
通讯作者：
FINDLAY, S
中科院分区：
文献类型：
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作者：
FINDLAY, S
在许多溪流中，大量的水在明渠周围的饱和沉积物（潜流带）和河道本身之间进行交换。与潜流带的这种交换有可能导致河水化学发生巨大变化，因为生物地球化学过程的速率和过程的实际类型（例如厌氧代谢与好氧代谢）可能根本不同。我提出了一个组织方案分组流系统成集群的最小，适度，和最大的贡献hyporheic新陈代谢的整体生态系统。由于缺乏不同水系的定量水文资料，无法对这一框架进行实际测试。提出了一种替代方案，组织几个良好的研究流作为一个功能的地下停留时间和氧含量的差异。这第二个计划的目的是激发讨论的概念框架，跨系统比较的重要性，河流生态系统中的潜流沉积物。
In many streams, significant amounts of water are exchanged between saturated sediments surrounding the open channel (the hyporheic zone) and the channel itself. Such exchanges with the hyporheic zone have the potential to cause large changes in streamwater chemistry because the rates of biogeochemical processes and the actual types of processes (e.g. anaerobic vs. aerobic metabolism) may be fundamentally different. I propose an organizational scheme for grouping stream systems into clusters of minimal, moderate, and maximal contribution of hyporheic metabolism to the overall ecosystem. Lack of information on quantitative hydrology for different stream systems prohibits actual testing of this framework. An alternative scheme is presented that organizes several well-studied streams as a function of subsurface residence time and differences in oxygen content. This second scheme is intended to stimulate discussion of conceptual frameworks for cross-system comparisons of the importance of hyporheic sediments in stream ecosystems.