作者: Ted R. Angradi , David W. Bolgrien , Terri M. Jicha , Mark S. Pearson , Debra L. Taylor
DOI: 10.1899/07-149.1
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摘要: AbstractWe sampled macroinvertebrate assemblages in the littoral benthos and on surface of snags Upper Mississippi, Missouri, Ohio rivers. Snag differed from benthic assemblages. Tubificids, Caenis, Tanytarsus, Cryptochironomus, Limnodrilus, Chironomini were consistently more abundant benthos; Nais, Cricotopus/Orthocladius, Nematoda, Rheotanytarsus snags. Filterers gatherers less than benthos. among rivers reaches within Variation was result direct indirect effects high-dam reservoir impoundments (upper vs lower Missouri River) low-dam impoundment for navigation (impounded free-flowing Mississippi River). The maximum relative abundance filterers River, which only long unregulated reach we studied, related to particulate organic C sestonic chlorophyll a c...