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首頁> 外文期刊>Ecological indicators >Bank erosion hazard index as an indicator of near-bank aquatic habitat and community structure in a southeastern Piedmont stream
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Bank erosion hazard index as an indicator of near-bank aquatic habitat and community structure in a southeastern Piedmont stream

機(jī)譯：堤岸侵蝕危害指數(shù)作為東南皮埃蒙特河流域近岸水生棲息地和群落結(jié)構(gòu)的指標(biāo)

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摘要

Streams in the southeastern Piedmont region display varying degrees of bank erosion, which in turn can influence multiple physical and biological processes. In efforts to assess and predict bank erosion, the multi-metric tool Bank Erosion Hazard Index (BEHI) is often calculated. As designed, the BEHI takes into consideration many physical phenomena and scores stream banks categorically from very low to extreme bank erosion hazard; however the power of this index to directly predict in-stream biological conditions is unknown. The predictive ability of BEHI was evaluated on near-bank aquatic biota and organic matter (OM) retention in an AL Piedmont stream with a range of bank conditions. Fifteen banks were characterized using the BEHI and subsequently, macroinvertebrates, crayfishes, fishes and organic matter associated with each bank were quantified. Results suggest increased macroinvertebrate richness and OM retention with low BEHI score. Multivariate analyses suggest functional similarity in macroinvertebrate assemblages associated with low BEHI banks and greater variation in assemblages as BEHI increased. Crayfish were more abundant at banks with high BEHI, a pattern attributed to increases in a generalist species in more-degraded habitats. Fish response showed no discernible pattern in relationship to BEHI score. These results suggest that BEHI may have applications as an informative ecological evaluation tool integrating physical and biological conditions in streams.
機(jī)譯：皮埃蒙特東南部地區(qū)的溪流顯示出不同程度的河岸侵蝕，進(jìn)而可以影響多種物理和生物過程。在評(píng)估和預(yù)測(cè)河岸侵蝕的努力中，通常會(huì)使用多指標(biāo)工具“河岸侵蝕危害指數(shù)”（BEHI）。按照設(shè)計(jì)，BEHI考慮了許多物理現(xiàn)象，并從非常低的銀行侵蝕風(fēng)險(xiǎn)到極端的銀行侵蝕風(fēng)險(xiǎn)分類對(duì)銀行進(jìn)行分類。但是，該指數(shù)直接預(yù)測(cè)河內(nèi)生物學(xué)條件的能力尚不清楚。在一定的河岸條件下，評(píng)估了BE Pimont溪流中近岸水生生物和有機(jī)物（OM）的保留能力，從而評(píng)估了BEHI的預(yù)測(cè)能力。使用BEHI對(duì)15個(gè)河岸進(jìn)行了特征分析，隨后，定量了與每個(gè)河岸相關(guān)的大型無脊椎動(dòng)物，小龍蝦，魚類和有機(jī)物。結(jié)果表明，低BEHI評(píng)分可增加大型無脊椎動(dòng)物的豐富度和OM保留率。多變量分析表明，與低BEHI庫相關(guān)的大型無脊椎動(dòng)物組合具有功能相似性，并且隨著BEHI增加，組合中的變化也更大。 BEHI較高的河岸小龍蝦數(shù)量較多，這種模式歸因于在退化程度更高的棲息地中通才種類增加。魚的反應(yīng)與BEHI得分的關(guān)系沒有明顯的規(guī)律。這些結(jié)果表明，BEHI可以作為整合河流中物理和生物條件的信息豐富的生態(tài)評(píng)估工具。

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  • 來源
    《Ecological indicators》 |2014年第8期|19-28|共10頁
  • 作者單位

    Department of Biology, Clarion University, 840 Wood St., Clarion, PA 16214, USA;

    Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL 36849, USA;

    Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL 36849, USA;

    Auburn University Museum of Natural History, Department of Biological Sciences, Auburn University, Auburn, AL 36849, USA;

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  • 正文語種 eng
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  • 關(guān)鍵詞

    Macroinvertebrates; Sedimentation; Bank erosion; Restoration; Convex hull;

    機(jī)譯：大型無脊椎動(dòng)物;沉降;銀行侵蝕;恢復(fù);凸包;

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