An invertebrate-based index to characterize ecological responses to flow intermittence in rivers

IF 0.9 4区 环境科学与生态学 Q4 LIMNOLOGY Fundamental and Applied Limnology Pub Date : 2019-09-01 DOI:10.1127/FAL/2019/1206
J. England, R. Chadd, M. Dunbar, Romain Sarremejane, R. Stubbington, C. G. Westwood, David Adams Leeming
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引用次数: 18

Abstract

Intermittent streams occur across global regions, and are increasingly recognized to support high bio-diversity and perform important ecological roles within catchments. New tools are needed to better characterize biotic responses to the full spectrum of environmental conditions that occur in these dynamic systems, because the biological indices developed to assess ecological responses to flow in perennial rivers may be inaccurate in intermittent streams. We present the Monitoring Intermittent Streams index (MIS-index), a new biological index that can be used to assess invertebrate responses to environmental changes spanning flowing, ponded and drying states. As well as fully aquatic taxa, the index includes semi-aquatic and terrestrial invertebrates from marginal habitats, which are collected during the standard surveys used by regulatory agencies to assess ecological quality. We explore how including these taxa within an index informs our understanding of aquatic–terrestrial invertebrate community responses to changing habitat composition, as intermittent streams transition from lotic to lentic then drier conditions. We explain the development of the MIS-index and explore its performance compared with other indices. We suggest index combinations that can be used to detect different aspects of ecological responses to variation in instream conditions, and highlight the advantages of including semi-aquatic and terrestrial taxa. We call for researchers to test the performance of the MIS-index across a wide range of intermittent stream types, to enable its development into an internationally applicable tool for the holistic assessment of ecological responses to changing hydrological conditions including drying.
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一个基于无脊椎动物的指数来表征河流间歇性流量的生态响应
间歇性溪流分布在全球各地区,越来越多地被认为支持高度生物多样性,并在集水区内发挥重要的生态作用。需要新的工具来更好地描述生物对这些动态系统中发生的全方位环境条件的反应,因为为评估常年河流对流量的生态反应而开发的生物指数在间歇性河流中可能不准确。我们提出了监测间歇流指数(MIS指数),这是一种新的生物指数,可用于评估无脊椎动物对流动、积水和干燥状态下的环境变化的反应。除了全水生分类群外,该指数还包括来自边缘栖息地的半水生和陆地无脊椎动物,这些无脊椎动物是在监管机构用于评估生态质量的标准调查中收集的。我们探索了将这些分类群纳入指数如何帮助我们理解水生-陆生无脊椎动物群落对栖息地组成变化的反应,因为间歇性的溪流从激流过渡到慢流,然后是干燥的条件。我们解释了MIS指数的发展,并探讨了其与其他指数的比较性能。我们建议使用指数组合来检测生态对河流内条件变化的不同方面的反应,并强调包括半水生和陆地分类群的优势。我们呼吁研究人员测试MIS指数在各种间歇性河流类型中的性能,使其能够发展成为一种国际适用的工具,用于全面评估生态对包括干旱在内的不断变化的水文条件的反应。
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来源期刊
Fundamental and Applied Limnology
Fundamental and Applied Limnology 地学-海洋与淡水生物学
CiteScore
2.40
自引率
0.00%
发文量
18
审稿时长
3.0 months
期刊介绍: Fundamental and Applied Limnology is an international journal for freshwater research in the widest sense, including problems of marine biology and brackish water research. Papers dealing with ecological topics are especially welcome in association with experimental or physiological studies. All papers published in this journal are subject to peer review.
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