An ecological assessment of Great Lakes tributaries in the Michigan Peninsulas
作者： Catherine M. Riseng , Michael J. Wiley , Paul W. Seelbach , R. Jan Stevenson
DOI: 10.1016/J.JGLR.2010.04.008
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摘要: ABSTRACT Michigan stream fish and macroinvertebrate community data from multiple sources were combined to conduct a statewide assessment of riverine ecological condition. Using regionally normalized metrics correct for methodological inconsistencies natural variation statistically based scoring criteria, about 50% all sampled sites in expected or better condition, 30% ecologically impaired, 20% marginal. Structural Equation Modeling with this regional dataset indicated that land use effects more important than point-source discharges. Biological appeared be sensitive urban agricultural use, riparian basin-wide use. Invertebrate communities marginally the suite anthropogenic stressors examined. observed status sites, Classification Regression Tree models used estimate condition ...
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