A new fish-based index of biotic integrity for lowland rivers in Flanders (Belgium)

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-11-25 DOI:10.26496/bjz.2021.89

J. Breine, E. Van den Bergh, Gerlinde Van Thyune, C. Belpaire

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引用次数: 1

Abstract

The first fish-based index to assess the ecological quality of lowland rivers in Flanders (Belgium) is based on data obtained from different fishing techniques without considering the gear specificity. As a consequence, this index could not be intercalibrated with other European indices which concentrate on one gear type only. In order to comply with the European Water Framework Directive, we developed a new fish-based index using data obtained from surveys in rivers with electric gear only. All 293 selected rivers belonged to the bream or barbel zone. An updated reference list of fish species was compiled based on previous work and recent data. Abiotic data were collected according to standard methods and habitat quality of all surveyed sites was pre-classified using pressure indicators. To develop the new index candidate metrics were selected from the literature and metric values were calculated. Linear mixed regression models selected metrics based on their response to the pre-classified habitat status. Correlation tests were performed to avoid redundancy among responsive metrics. Boundaries for metric scores were defined based on the calculated metric values. The new index of biotic integrity (IBI) was calculated by summation of the metric scores, and transformed to an ecological quality ratio (EQR), ranging between 0 and 1. Five integrity classes, ranging from bad to maximal ecological potential, were attributed and compared to the pre-classified habitat status of the site. In addition, the new index was also validated with an independent set of data. The new IBI proved to successfully assess the ecological status of the rivers.

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一种新的基于鱼类的佛兰德斯低地河流生物完整性指数（比利时）

评估佛兰德斯（比利时）低地河流生态质量的第一个基于鱼类的指数是基于从不同捕鱼技术获得的数据，而不考虑渔具的特殊性。因此，该指数无法与其他只关注一种齿轮类型的欧洲指数相互校准。为了遵守《欧洲水框架指令》，我们使用仅使用电动齿轮的河流调查数据，开发了一个新的基于鱼类的指数。所有293条选定的河流都属于鲷鱼或杠铃鱼区。根据以前的工作和最近的数据编制了一份最新的鱼类参考清单。根据标准方法收集非生物数据，并使用压力指标对所有调查地点的栖息地质量进行预分类。为了开发新的指标，从文献中选择了候选指标，并计算了指标值。线性混合回归模型根据它们对预先分类的栖息地状态的反应来选择指标。进行相关性测试以避免响应度量之间的冗余。根据计算出的度量值来定义度量分数的边界。新的生物完整性指数（IBI）是通过指标得分的总和计算的，并转换为生态质量比（EQR），范围在0到1之间。将从恶劣到最大生态潜力的五个完整性类别进行了归属，并与该场地的预先分类的栖息地状态进行了比较。此外，新指数还通过一组独立的数据进行了验证。事实证明，新的IBI成功地评估了河流的生态状况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.