High resolution spatiotemporal patterns of flow at the landscape scale in montane non‐perennial streams

High resolution spatiotemporal patterns of flow at the landscape scale in montane non‐perennial streams
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山地非常年溪流景观尺度的高分辨率时空流动模式

DOI:
10.1002/rra.4076
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发表时间:
2022
影响因子:
2.2
通讯作者:
Olden, Julian D.
Olden, Julian D.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Sabathier, Romy;Singer, Michael Bliss;Stella, John C.;Roberts, Dar A.;Caylor, Kelly K.;Jaeger, Kristin L.;Olden, Julian D.

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旱地环境中间歇性和短暂的溪流支持着水生和陆生生物的多样化组合。了解水的流动时间和地点可以深入了解水的可用性、水对外部控制因素的反应以及对气候变化和一系列人类活动的潜在敏感性。关于干湿循环时间的知识对于绘制依赖这些临时水源的物种和生态系统的关键栖息地也很有用。然而,确定水流和河道沉积物水分的位置和监测时间仍然是一项具有挑战性的工作。在本文中,我们分析了分布在亚利桑那州(美国)干旱山前的10条河流上的37个传感器的日电导率,以评估水流持久性的时空模式,即河流中水的时间和范围。电导率传感器提供地表流量和沉积物湿度的信息,支持基于季节性流量动态的河流分类。我们的研究结果提供了对季节性降雨的流量响应的见解,突出了河流对降雨的反应,而不是那些显示更稳定的河流。在地表地质的背景下,探讨了河流对降水的响应强度。总而言之,电导率数据可用于绘制水依赖性物种在空间和时间上的潜在河流栖息地,同时也为评估对持续气候变化的敏感性提供了基础。
Intermittent and ephemeral streams in dryland environments support diverse assemblages of aquatic and terrestrial life. Understanding when and where water flows provide insights into the availability of water, its response to external controlling factors, and potential sensitivity to climate change and a host of human activities. Knowledge regarding the timing of drying/wetting cycles can also be useful to map critical habitats for species and ecosystems that rely on these temporary water sources. However, identifying the locations and monitoring the timing of streamflow and channel sediment moisture remains a challenging endeavor. In this paper, we analyzed daily conductivity from 37 sensors distributed along 10 streams across an arid mountain front in Arizona (United States) to assess spatiotemporal patterns in flow permanence, defined as the timing and extent of water in streams. Conductivity sensors provide information on surface flow and sediment moisture, supporting a stream classification based on seasonal flow dynamics. Our results provide insight into flow responses to seasonal rainfall, highlighting stream reaches very reactive to rainfall versus those demonstrating more stable streamflow. The strength of stream responses to precipitation are explored in the context of surficial geology. In summary, conductivity data can be used to map potential stream habitat for water‐dependent species in both space and time, while also providing the basis upon which sensitivity to ongoing climate change can be evaluated.
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影响因子: --
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