Predation, resource availability, and community structure in Neotropical water-filled tree holes

Yanoviak, Stephen P.

doi:10.1007/s004420000493

Cited by 60 publications

(55 citation statements)

References 55 publications

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“…Thus, they could be more tolerant to changes in habitat size in terms of feeding requirements. They do, however, show a certain preference for larger organisms (Fincke et al 1997, Yanoviak 2001, which are expected to occur more frequently in larger habitats. Per capita biomass of detritivores does not increase along the habitat-size gradient at the sites with odonates, likely because there is no effective size refuge from odonate predation.…”

Section: Effects Of Habitat Size At Sites With Odonatesmentioning

confidence: 94%

“…This large difference in the size of their habitat influences detritivore density and species richness (Richardson 1999, Srivastava 2006, Jocque and Field 2014, algal biomass (Marino et al 2011), predator : prey richness ratios, and subsequently, topological properties of connectance webs (De´zerald et al 2013), as well as the presence of odonate larvae (Srivastava 2006). Odonate larvae are large, dominant generalist predators in tropical phytotelmata (Fincke et al 1997, Yanoviak 2001, Srivastava 2006, Srivastava and Bell 2009. However, odonates only occur in bromeliads over part of the geographic range of Bromeliaceae, from Mexico in the north to Argentina in the south (Kitching 2000).…”

Section: Introductionmentioning

confidence: 99%

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Dominant predators mediate the impact of habitat size on trophic structure in bromeliad invertebrate communities

Petermann

Farjalla

Jocqué

et al. 2015

Ecology

133

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Abstract. Local habitat size has been shown to influence colonization and extinction processes of species in patchy environments. However, species differ in body size, mobility, and trophic level, and may not respond in the same way to habitat size. Thus far, we have a limited understanding of how habitat size influences the structure of multitrophic communities and to what extent the effects may be generalizable over a broad geographic range. Here, we used water-filled bromeliads of different sizes as a natural model system to examine the effects of habitat size on the trophic structure of their inhabiting invertebrate communities. We collected composition and biomass data from 651 bromeliad communities from eight sites across Central and South America differing in environmental conditions, species pools, and the presence of large-bodied odonate predators. We found that trophic structure in the communities changed dramatically with changes in habitat (bromeliad) size. Detritivore : resource ratios showed a consistent negative relationship with habitat size across sites. In contrast, changes in predator : detritivore (prey) ratios depended on the presence of odonates as dominant predators in the regional pool. At sites without odonates, predator : detritivore biomass ratios decreased with increasing habitat size. At sites with odonates, we found odonates to be more frequently present in large than in small bromeliads, and predator : detritivore biomass ratios increased with increasing habitat size to the point where some trophic pyramids became inverted. Our results show that the distribution of biomass amongst food-web levels depends strongly on habitat size, largely irrespective of geographic differences in environmental conditions or detritivore species compositions. However, the presence of largebodied predators in the regional species pool may fundamentally alter this relationship between habitat size and trophic structure. We conclude that taking into account the response and multitrophic effects of dominant, mobile species may be critical when predicting changes in community structure along a habitat-size gradient.

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Section: Effects Of Habitat Size At Sites With Odonatesmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Dominant predators mediate the impact of habitat size on trophic structure in bromeliad invertebrate communities

Petermann

Farjalla

Jocqué

et al. 2015

Ecology

133

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“…One hypothesis that has received attention is the more individuals hypothesis (hereafter MIH) (Srivastava and Lawton 1998;Yanoviak 2001;Hurlbert 2004Hurlbert ,2006). This mechanism is based on species-energy theory (Wright 1983;Rosenzweig and Abramsky 1993;Abrams 1995) and is a refinement of the ideas of Preston (1962).…”

Section: Introductionmentioning

confidence: 99%

Abundance matters: a field experiment testing the more individuals hypothesis for richness–productivity relationships

Yee

Juliano

2007

Oecologia

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The more individuals hypothesis (MIH) postulates that productivity increases species richness by increasing mean equilibrium population size, thereby reducing the probability of local extinction. We tested the MIH for invertebrates colonizing microcosms that simulated tree holes by manipulating productivity through additions of leaf or animal detritus and subsequently determining the relationships among richness, total abundance, abundance per species, and measures of productivity. We quantified productivity as the rate of microorganism protein synthesis, microorganism metabolic rate, nutrient ion concentration, and type and amount of detritus. Microcosms with animal detritus attracted more species, more individuals per species, and more total individuals than did microcosms with similar amounts of leaf detritus. Relationships between richness or abundance and productivity varied with date. Richness in June increased as a linear function of productivity, whereas the power function predicted by the MIH fit best in July. Abundance in June and July was best described by a power function of productivity, but the linear function predicted by the MIH fit best in September. Abundance per species was best described by a power function of productivity in June and July. Path analysis showed that the indirect effect of productivity through abundance on richness that is predicted by MIH was important in all months, and that direct links between productivity and richness were unnecessary. Our results support many of the predictions of the MIH, but they also suggest that the effects of abundance on richness may be more complex than expected.

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“…A distribuição de espécies de invertebrados em fitotelmatas pode ser afetada por fatores bióticos como predação e competição (Srivastava & Lawton, 1998;Fincke, 1992;Yanoviak, 1999aYanoviak, , 2001a, bem como fatores abióticos como tamanho, volume, pH e temperatura da água, disponibilidade de nutrientes e altura do habitat em relação ao solo (Fincke, 1998(Fincke, , 1999Yanoviak, 1999b). Culicidae, por exemplo, são presas potenciais de velídeos em fitotelmatas (Frick, 1949;Yanoviak, 1999c;Kitching, 2000).…”

Section: Introductionunclassified

Distribuição de Paravelia recens (Drake & Harris, 1935) (Hemíptera, Heteroptera, Veliidae) em Guzmania brasiliensis Ule, 1907 (Bromeliaceae) na Reserva Florestal Adolpho Ducke, Amazonas, Brasil

2007

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RESUMOEste é o primeiro registro de Paravelia recens (Drake & Harris, 1935) (Heteroptera: Veliidae) em fitotelmata de Guzmania brasiliensis Ule, 1907 (Bromeliaceae) (t-test between season; t=2,57; p=0,011), and the abundance of individuals was positively correlated with water volume by bromeliad (r s = 0,18; p=0,033). This fact could be explained by the major input of water in the wet season, causing the increase of mean water volume by bromeliad.

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Predation, resource availability, and community structure in Neotropical water-filled tree holes

Cited by 60 publications

References 55 publications

Dominant predators mediate the impact of habitat size on trophic structure in bromeliad invertebrate communities

Dominant predators mediate the impact of habitat size on trophic structure in bromeliad invertebrate communities

Abundance matters: a field experiment testing the more individuals hypothesis for richness–productivity relationships

Distribuição de Paravelia recens (Drake & Harris, 1935) (Hemíptera, Heteroptera, Veliidae) em Guzmania brasiliensis Ule, 1907 (Bromeliaceae) na Reserva Florestal Adolpho Ducke, Amazonas, Brasil

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