Brose, Ulrich Jonsson, Tomas Berlow, Eric L. Warren, Philip Banasek-Richter, Carolin Bersier, Louis-Félix Blanchard, Julia L. Brey, Thomas Carpenter, Stephen R. Blandenier, Marie-France Cattin Cushing, Lara Dawah, Hassan Ali Dell, Tony Edwards, Francois Harper-Smith, Sarah Jacob, Ute Ledger, Mark E. Martinez, Neo D. Memmott, Jane Mintenbeck, Katja Pinnegar, John K. Rall, Björn C. Rayner, Thomas S. Reuman, Daniel C. Ruess, Liliane Ulrich, Werner Williams, Richard J. Woodward, Guy Cohen, Joel E. 2006 It has been suggested that differences in body size between consumer and resource species may have important implications for interaction strengths, population dynamics, and eventually food web structure, function, and evolution. Still, the general distribution of consumer–resource body-size ratios in real ecosystems, and whether they vary systematically among habitats or broad taxonomic groups, is poorly understood. Using a unique global database on consumer and resource body sizes, we show that the mean body-size ratios of aquatic herbivorous and detritivorous consumers are several orders of magnitude larger than those of carnivorous predators. Carnivorous predator–prey body-size ratios vary across different habitats and predator and prey types (invertebrates, ectotherm, and endotherm vertebrates). Predator–prey body-size ratios are on average significantly higher (1) in freshwater habitats than in marine or terrestrial habitats, (2) for vertebrate than for invertebrate predators, and (3) for invertebrate than for ectotherm vertebrate prey. If recent studies that relate body-size ratios to interaction strengths are general, our results suggest that mean consumer–resource interaction strengths may vary systematically across different habitat categories and consumer types. application/pdf https://folia.unifr.ch/global/documents/301398 https://folia.unifr.ch/documents/301398/files/Ecology_Brose_2006.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1890/0012-9658(2006)87 info:eu-repo/semantics/openAccess License undefined Ecology. - 2006, vol. 87, no. 10, p. 2411-2417 allometry body length body mass body-size ratio food webs parasitoid-host predation predator-prey info:eu-repo/classification/udc/57 Consumer-resource body-size relationships in natural food webs http://purl.org/coar/resource_type/c_6501