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A Landscape Assessment and Associated Dataset of Stream Confluences for the Conterminous U.S.
Journal of the American Water Resources Association ( IF 2.4 ) Pub Date : 2020-12-28 , DOI: 10.1111/1752-1688.12899
Donald Ebert 1 , James Wickham 1 , Anne Neale 1 , Megan Mehaffey 1
Affiliation  

Stream confluences are important components of fluvial networks. Hydraulic forces meeting at stream confluences often produce changes in streambed morphology and sediment distribution. These changes often increase habitat heterogeneity relative to upstream and downstream locations, which have led some to identify them as biological hotspots. Despite their potential ecological importance, there are relatively few empirical studies documenting ecological patterns upstream and downstream of confluences. We have produced a publicly available dataset of stream confluences and associated watershed attributes for the conterminous United States. The dataset includes 1,085,629 stream confluences and 383 attributes for each confluence organized into 15 dataset tables for both tributary and mainstem upstream catchments and watersheds. Themes in the dataset include hydrology (e.g., stream order), land cover, land cover change, geology (e.g., calcium content of underlying lithosphere), physical condition (e.g., precipitation), measures of ecological integrity, and stressors (e.g., impaired streams). Additionally, we used measures of ecological integrity to assess the condition of the stream confluences. Aside from a generally positive east‐to‐west gradient in ecological condition, we found that approximately one‐third of the confluences had markedly contrasting ecological conditions between mainstem and tributary, catchment and watershed, or both. The dataset should support many, multifaceted studies of stream confluence ecology.

中文翻译:

美国本土河流汇流的景观评估和相关数据集

流汇合是河流网络的重要组成部分。在汇流处汇合的水力通常会改变河床的形态和沉积物的分布。这些变化通常会增加相对于上游和下游位置的栖息地异质性,从而使一些人将其识别为生物热点。尽管它们具有潜在的生态重要性,但相对较少的实证研究表明汇合处上游和下游的生态模式。我们已经生成了一个可公开获得的河流汇流和相关美国分水岭属性的数据集。该数据集包括1,085,629个河流汇合处和383个属性,每个汇合处被组织成15个数据表,分别用于支流和干流上游集水区和集水区。数据集中的主题包括水文(例如河流顺序),土地覆盖,土地覆盖变化,地质(例如下伏岩石圈的钙含量),物理条件(例如降水),生态完整性测度和压力源(例如受损)流)。此外,我们使用了生态完整性指标来评估河流汇合的条件。除了总体上从东到西的生态条件梯度呈正值外,我们还发现约有三分之一的汇合处干流与支流,集水区和集水区或两者之间的生态条件形成了鲜明的对比。该数据集应支持河流汇流生态学的许多多方面研究。降水),生态完整性测度和压力源(例如溪流受损)。此外,我们使用了生态完整性指标来评估河流汇合的条件。除了总体上从东到西的生态条件梯度呈正值外,我们还发现约有三分之一的汇合处干流与支流,集水区和集水区或两者之间的生态条件形成了鲜明的对比。该数据集应支持河流汇流生态学的许多多方面研究。降水),生态完整性测度和压力源(例如溪流受损)。此外,我们使用了生态完整性指标来评估河流汇合的条件。除了总体上从东到西的生态条件梯度呈正值外,我们还发现约有三分之一的汇合处干流与支流,集水区和集水区或两者之间的生态条件形成了鲜明的对比。该数据集应支持河流汇流生态学的许多多方面研究。我们发现,约有三分之一的汇合处干流与支流,集水区和分水岭或两者之间的生态条件明显不同。该数据集应支持河流汇流生态学的许多多方面研究。我们发现,约有三分之一的汇合处干流与支流,集水区和分水岭或两者之间的生态条件明显不同。该数据集应支持河流汇流生态学的许多多方面研究。
更新日期:2020-12-28
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