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Six functional feeding group (FFG) indices applied in ecological assessment were tested for their accuracy in detecting impairment in 12 cases of disturbance on 11 streams in south-western Germany. Three metrics – percentage of predators, percentage of shredders and Rhithron-Ernährungstypen-Index RETI – performed well in small highland streams up to five m width. The FFG metrics were compared to the...
We examined the variability of macroinvertebrate assemblage structure, species identities, and functional feeding group composition in relation to stream size, tributary position, and in-stream factors in a boreal watershed in Finland. Our study included three riffle sites in each of three stream sections in each of three stream size classes. Multi-response permutation procedure, indicator value method,...
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