Longitudinal variation in the nutritional quality of basal food sources and its effect on invertebrates and fish in subalpine rivers

Fen Guo, Nadine Ebm, Stuart Bunn, Michael Brett, Hannes Hager & Martin Kainz
1. There is growing recognition of the importance of food quality over quantity for aquatic consumers. In streams and rivers, most previous studies considered this primarily in terms of the quality of terrestrial leaf litter and importance of microbial conditioning. However, many recent studies suggest that algae are a more nutritional food source for riverine consumers than leaf litter. To date, few studies have quantified longitudinal shifts in the nutritional quality of basal food resources...
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