Evaluation of Deposited Sediment and Macroinvertebrate Metrics Used to Quantify Biological Response to Excessive Sedimentation in Agricultural Streams
Evaluation of Deposited Sediment and Macroinvertebrate Metrics Used to Quantify Biological Response to Excessive Sedimentation in Agricultural Streams
复制标题
沉积沉积物和大型无脊椎动物指标的评估，用于量化农业溪流中过度沉积的生物反应
DOI：
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发表时间：
2012
影响因子：
3.5
通讯作者：
Glenn A. Benoy
中科院分区：
文献类型：
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作者：
Andrew B. Sutherland;J. Culp;Glenn A. Benoy
本研究的目的是评估大型无脊椎动物和沉积物的指标是最好的确定过度沉积对河流完整性的影响。15个瞬时沉积物的指标，与土地覆盖的关系最强，进行了比较，浅滩大型无脊椎动物指标的流跨越梯度的土地扰动。沉积物的度量有很强的相关性蜉蝣目，鳞翅目和毛翅目的相对丰度和6个有很强的相关性的修改家庭生物指数（MFBI）。几个功能摄食组和习惯组沉积沉积物显着相关，这可能是与浅滩的重点，而不是达到广泛的大型无脊椎动物，作为达到广泛的沉积物指标更密切相关的人类土地利用。我们的研究结果表明，粗层次沉积物度量，直观估计的罚款，和粗层次的生物指数，MFBI，可能是有用的生物监测工作，旨在确定人为沉积对河流生物完整性的影响。
The objective of this study was to evaluate which macroinvertebrate and deposited sediment metrics are best for determining effects of excessive sedimentation on stream integrity. Fifteen instream sediment metrics, with the strongest relationship to land cover, were compared to riffle macroinvertebrate metrics in streams ranging across a gradient of land disturbance. Six deposited sediment metrics were strongly related to the relative abundance of Ephemeroptera, Plecoptera and Trichoptera and six were strongly related to the modified family biotic index (MFBI). Few functional feeding groups and habit groups were significantly related to deposited sediment, and this may be related to the focus on riffle, rather than reach-wide macroinvertebrates, as reach-wide sediment metrics were more closely related to human land use. Our results suggest that the coarse-level deposited sediment metric, visual estimate of fines, and the coarse-level biological index, MFBI, may be useful in biomonitoring efforts aimed at determining the impact of anthropogenic sedimentation on stream biotic integrity.