文章基本信息

标题：Index of Biotic Integrity Utility for the Fishery of the James River of the Dakotas
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作者：Jeffrey S. Shearer ; Charles R. Berry Jr.
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：2002
卷号：17
期号：4
页码：575-588
DOI：10.1080/02705060.2002.9663935
出版社：Taylor & Francis
摘要：Twenty-two metrics were evaluated and used to modify an index of biotic integrity (IBI) to assess the fish community health of five regions within the James River watershed of North Dakota and South Dakota. Pearson correlation coefficients, scatter plots, principal component analysis, and Kendall's tau were used to examine metric redundancy, response, and contribution to IBI scores. Only four metrics were strongly correlated with one other metric (r≥ 0.90). About half the metrics displayed an increasing or decreasing linear response to biotic integrity. The first two principal components accounted for 69 to 86% of the variance in the five regions of the basin. All metrics contributed to the IBI score throughout the basin, except for five metrics at upper river sites. Low species richness resulted in poor performance by most metrics for the upper 435-km North Dakota portion of the basin; however, the IBI does appear to be a useful biomonitoring tool for the lower 760-km South Dakota portion of the basin.