Consumer-resource body-size relationships in natural food webs
Brose, Ulrich, Johnsson, Tomas, Berlow, Eric L., Warren, Philip, Banasek-Richter, Carolin, Bersier, Louis-Felix, 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, Bjorn C., Rayner, Thomas S., Reuman, Daniel C., Ruess, Liliane, Ulrich, Werner, Williams, Richard J., Woodward, Guy, and Cohen, Joel E. (2006) Consumer-resource body-size relationships in natural food webs. Ecology, 87 (10). pp. 2411-2417.
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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.
|Item Type:||Article (Refereed Research - C1)|
Reproduced with permission from Ecological Society of America (ESA).
|Keywords:||allometry; body length; body mass; body-size ratio; food webs; parasitoid-host; predation; predator-prey|
|FoR Codes:||06 BIOLOGICAL SCIENCES > 0699 Other Biological Sciences > 069999 Biological Sciences not elsewhere classified @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%|
|Deposited On:||24 Nov 2009 10:40|
|Last Modified:||18 Oct 2013 00:33|
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