Journal
FRESHWATER BIOLOGY
Volume 46, Issue 2, Pages 161-171Publisher
WILEY
DOI: 10.1046/j.1365-2427.2001.00655.x
Keywords
detritus; leaf breakdown; shredders; species richness; streams
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1. Leaf litter breakdown rates were assessed in 23 boreal streams of varying size (first-seventh order) in central and northern Sweden. 2. Shredders were most abundant in small streams, while shredder species richness showed a hump-shaped relationship with stream order, with most species in fourth order streams. 3. In a partial least-squares regression analysis, year, water temperature, shredder species richness and shredder abundance were those factors correlating most strongly with leaf breakdown rates. Shredder species richness was more strongly correlated with leaf lifter breakdown rates than shredder abundance, and shredder biomass showed no such correlation. 4. These data suggest that shredder species richness is an important variable in terms of leaf litter dynamics in streams.
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