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Habitat structure, trophic structure and ecosystem function: interactive effects in a bromeliad–insect community

Show simple item record Srivastava, Diane S. 2016-02-22T00:56:52Z 2016-02-22T00:56:52Z 2006-08-01
dc.identifier.citation Srivastava, D. S. (2006). Habitat structure, trophic structure and ecosystem function: Interactive effects in a bromeliad–insect community. Oecologia, 149(3), 493-504. es_CR
dc.identifier.uri 10.1007/s00442-006-0467-3
dc.description.abstract Although previous studies have shown that ecosystem functions are affected by either trophic structure or habitat structure, there has been little consideration of their combined effects. Such interactions may be particularly important in systems where habitat and trophic structure covary. I use the aquatic insects in bromeliads to examine the combined effects of trophic structure and habitat structure on a key ecosystem function: detrital processing. In Costa Rican bromeliads, trophic structure naturally covaries with both habitat complexity and habitat size, precluding any observational analysis of interactions between factors. I therefore designed mesocosms that allowed each factor to be manipulated separately. Increases in mesocosm complexity reduced predator (damselfly larva) efficiency, resulting in high detritivore abundances, indirectly increasing detrital processing rates. However, increased complexity also directly reduced the per capita foraging efficiency of the detritivores. Over short time periods, these trends effectively cancelled each other out in terms of detrital processing. Over longer time periods, more complex patterns emerged. Increases in mesocosm size also reduced both predator efficiency and detritivore efficiency, leading to no net effect on detrital processing. In many systems, ecosystem functions may be impacted by strong interactions between trophic structure and habitat structure, cautioning against examining either effect in isolation. es_CR
dc.language.iso en_US es_CR
dc.publisher Oecologia es_CR
dc.subject Aquatic insects es_CR
dc.subject Decomposition es_CR
dc.subject Habitat size es_CR
dc.subject Habitat complexity es_CR
dc.subject Predation es_CR
dc.subject insectos acuáticos es_CR
dc.subject descomposición es_CR
dc.subject la complejidad del hábitat es_CR
dc.subject tamaño de hábitat es_CR
dc.subject depredación es_CR
dc.title Habitat structure, trophic structure and ecosystem function: interactive effects in a bromeliad–insect community es_CR
dc.type Article es_CR

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    Artículos de Acceso Abierto y Manuscritos de Investigadores entregados a ACG

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