AN APPRAISAL OF POND-NET SAMPLES FOR BIOLOGICAL MONITORING OF LOTIC MACRO-INVERTEBRATES
AN APPRAISAL OF POND-NET SAMPLES FOR BIOLOGICAL MONITORING OF LOTIC MACRO-INVERTEBRATES
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DOI：
10.1016/0043-1354(81)90160-3
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发表时间：
1981-01-01
期刊：
影响因子：
12.8
通讯作者：
MOSS, D
中科院分区：
文献类型：
--
作者：
FURSE, MT;WRIGHT, JF;MOSS, D
评估了使用池塘网对底栖大型无脊椎动物进行取样的情况，以供用于国家自来水地点分类计划。在现场试验中，在英格兰西南部阿克斯河的4个地点采集了6个持续3分钟的池塘网样本。不同的人（3）在每个研究中心各采集2份样本。捕获的科和物种的数量的比较表明显着差异，就网站，操作员和网站。操作员交互。从样品中删除的类群的数量显着的操作员之间的差异也显示在样品处理阶段，但仅在家庭水平。尽管存在这些差异，聚类和排序程序显示出较强的网站忠诚度为每个系列的6个样本时，在物种水平上分析数据。在家庭水平上的类似分析产生了几个错误的分类与其他网站的样本。当将丰度类别应用于家庭一级数据时，大多数这些错误分类都被消除了。采集3分钟样品。62%的科和50%的种可以通过18分钟的撒网在一个地点获得。这项实地试验的结果提供了理由，使用池塘网作为主要的抽样技术，在分类工作。
The use of a pond-net to sample benthic macro-invertebrates was assessed for use in a national classification scheme for running water sites. In a field trial, 6 pond-net samples of 3 min duration were taken at 4 sites on the River Axe in southwest England [UK]. Different people (3) each took 2 samples at each site. A comparison of the number of families and species caught indicated significant differences with respect to sites, operators and site .times. operator interactions. Significant inter-operator differences in the number of taxa removed from samples were also shown at the sample processing stage, but only at family level. Despite these differences, clustering and ordination procedures showed strong site faithfulness for each series of 6 samples when data were analyzed at species level. Similar analyses at family level produced several misclassifications of samples with those from other sites. Most of these misclassifications were eliminated when categories of abundance were applied to the family level data. A 3 min sample collected .apprx. 62% of families and 50% of species that could be attained at a site by 18 min netting. Results of this field trial provided justification for the use of a pond-net as the principal sampling technique in the classification exercise.