作者: David R. Gillespie , Sherah L. VanLaerhoven , Robert R. McGregor , Shannon Chan , Bernard D. Roitberg
DOI: 10.1155/2012/495805
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摘要: True omnivores that feed on both plant and animal tissues are not additive combinations of herbivore predator (carnivore). Because true must distribute adaptive feeding decisions among two disparate tissue types, understanding the context plants provide for foraging is important to understand their role in food webs. We varied prey resources investigate an omnivorous bug, Dicyphus hesperus. The contribution species fitness was unimportant water acquisition decisions, but affected numbers consumed over longer periods. In communities, absence prey, D. hesperus moved with highest resource quality. Unlike pure predators facing declining can use a nondepleting fund future without paying significant cost. However, dual exploitation also impose constraints when types essential. presence relatively profitable spatially separate from intermediate consumer populations could mechanism promote stability within webs plant-feeding omnivores. effects will require adding second-order terms Lotka-Volterra structure explicitly account kinds interactions we have observed here.