BIOTIC SCORE AND PREDICTION TO ASSESS THE EFFECTS OF WATER ABSTRACTIONS ON RIVER MACROINVERTEBRATES FOR CONSERVATION PURPOSES
BIOTIC SCORE AND PREDICTION TO ASSESS THE EFFECTS OF WATER ABSTRACTIONS ON RIVER MACROINVERTEBRATES FOR CONSERVATION PURPOSES
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DOI：
10.1002/aqc.3270020102
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发表时间：
1992-03-01
影响因子：
2.4
通讯作者：
PETTS, GE
中科院分区：
文献类型：
--
作者：
ARMITAGE, PD;PETTS, GE
1.从英国的溪流和河流中抽取水可能产生的影响引起了自然保护机构的关注。本文探讨了使用基于计算机的RIVPACS系统的生物评分和预测来评估提取对底栖动物区系的影响的可行性。对22条河流的控制点和“受影响”点进行了检查，这些河流经历了水力发电、饮用水供应(直接或通过地下水提取)、喷灌和养鱼。采用生物评分与预测值之比以及动物种群的观测值与预测值的比较来评价场地的生物质量。在22条河流的51个地点中，只有11个地点显示出环境质量下降的迹象。这些地点包括八个位于一条接受肥沃农田径流的低地小溪上的地点；两个位于高地溪流上的地点，在我们调查之前经历了严重的洪灾；以及一条小白垩溪，庞河。流量、基流、底物和海拔是造成生物分数、物种数、科数和总丰度等区系参数变化的主要原因。研究的主要结论是，高地溪流似乎没有因为抽水而受到不利影响，而低地溪流似乎退化得更严重，但除了彭之外，这不一定归因于抽水。RIVPACS的生物评分不能用来设定‘最低生态流量’，但可以直接用来评估场地质量，识别可能与抽象有关或可能不与抽象有关的关注区域；或者间接地，通过参考RIVPACS数据库来评估无脊椎动物群落的保护兴趣。
1. The possible impacts of abstraction of water from streams and rivers in the UK have generated concern in conservation bodies.2. This paper examines the feasibility of using biotic scores and predictions from the computer-based RIVPACS system to assess the effects of abstractions on benthic fauna.3. Control and 'impacted' sites on 22 rivers which experienced abstractions for hydroelectric power generation, supply of drinking water (either directly or through groundwater abstraction), spray irrigation and fish farming, were examined.4. The ratios of observed to predicted biotic scores and comparison of observed fauna with that predicted by RIVPACS were used to assess the biological quality of the sites.5. Only 11 of the 51 sites on the 22 rivers showed signs of reduced environmental quality. These included eight sites on a small lowland stream which receives run-off from fertilized agricultural land and is subject to spray irrigation; two sites on upland streams which had experienced severe spates prior to our survey and a small chalk stream, the Pang.6. Discharge, baseflow, substrate and altitude were factors which explained most of the variation in faunal parameters such as biotic score, numbers of species, numbers of families and total abundance.7. The main conclusions of the study are that upland streams did not appear to suffer adverse effects as a result of abstraction whereas lowland streams appeared to be more degraded, but with the exception of the Pang this could not necessarily be attributed to abstraction.8. Biotic scores with RIVPACS cannot be used to set 'minimum ecological flows' but can be used either directly, to assess site-quality and to identify areas of concern which may or may not be related to abstraction; or indirectly, by reference to the RIVPACS data-base to assess the conservation interest of invertebrate assemblages.