Biotic filtering by species’ interactions constrains food-web variability across spatial and abiotic gradients

Barbara Bauer, Emilio Berti, Remo Ryser, Benoit Gauzens, Myriam Hirt, Benjamin Rosenbaum, Christoph Digel, David Ott, Stefan Scheu & Ulrich Brose
Despite intensive research on species dissimilarity patterns across communities (i.e. beta-diversity), we still know little about their implications for variation in food-web structures. Our analyses of 50 lake and 48 forest soil communities show that, while species dissimilarity depends on environmental and spatial gradients, these effects are only weakly propagated to the networks. Moreover, our results show that species and food-web dissimilarities are consistently correlated, but that much of the variation in food-web structure across...
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