Rabeni C F, Wang N
U S. Geological Survey, Missouri Cooperative Fish and Wildlife Research Unit, University of Missouri, Columbia, USA.
Environ Monit Assess. 2001 Oct;71(2):177-85. doi: 10.1023/a:1017523115381.
We compared the sensitivity of commonly used bioassessment metrics to detect organic impairment of streams using data sets that varied only in the inclusion or exclusion of Chironomidae identified to genus. We evaluated situations in two contrasting ecoregions of Missouri, U.S.A., the Ozark ecoregion and the Prairie ecoregion where Chironomidae comprise an average of 32 and 42%, respectively, of the total number of individuals. The without-Chironomidae data showed either identical or greater sensitivity than with Chironomidae data in every case when using the metrics total taxa, biotic index. Shannon's diversity index, and % dominant taxon. We conclude that bioassessment programs employing commonly-used metrics that usually incorporate Chironomidae may become more efficient by eliminating Chironomidae from the protocols and using those resources for analyzing additional sites.
我们使用仅在是否包含鉴定到属的摇蚊科方面有所不同的数据集，比较了常用生物评估指标检测溪流有机损害的敏感性。我们评估了美国密苏里州两个形成对比的生态区的情况，即奥扎克生态区和草原生态区，在这两个生态区中，摇蚊科个体分别平均占个体总数的32%和42%。在使用总分类单元、生物指数、香农多样性指数和优势分类单元百分比这些指标时，不包含摇蚊科的数据在每种情况下都显示出与包含摇蚊科的数据相同或更高的敏感性。我们得出结论，采用通常纳入摇蚊科的常用指标的生物评估项目，通过从方案中剔除摇蚊科并将这些资源用于分析更多站点，可能会变得更有效率。
