Resource Partitioning in Amphibians and Reptiles

Toft, Catherine A.

doi:10.2307/1444785

Cited by 408 publications

(354 citation statements)

References 122 publications

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“…These results indicate that closely related species from different ecological guilds, and distantly related species from the same or different ecological guilds, tend to partition their microhabitat utilization in order to coexist; this was also indicated in previous studies (Schoener, 1974;Toft, 1985;Vitt and Zani, 1996). Species that are closely related tend to partition their microhabitat utilization for them to coexist.…”

Section: Discussionsupporting

confidence: 82%

Microhabitat partitioning of closely related Sarawak (Malaysian Borneo)frog species previously assigned to the genus Hylarana (Amphibia: Anura)

Zainudin

Zain²,

Ahmad³

et al. 2017

Turk J Zool

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Microhabitats play an important role as resources that are partitioned between phylogenetically related or ecologically similar species (i.e., a guild). This hypothesis was tested by first elucidating phylogenetically closed Sarawak frog species via DNA sequencing of the 16S rRNA mitochondrial DNA gene, and later determining their microhabitat guild and partitioning via nonmetric dimensional scale. Mitochondrial 16S gene revealed 5 monophyletic groups consisting of Hylarana erythraea + Amnirana nicobariensis, Chalcorana raniceps, Abavorana luctuosa, Pulchrana signata + P. picturata, and P. baramica + P. glandulosa + P. laterimaculata. On the other hand, microhabitat utilization grouped the frogs into 5 ecological guilds consisting of semiarboreal species at the forest edge (C. raniceps), ground dwellers in an unforested region (H. erythraea), ground dwellers (rock) at the forest edge (P. picturata), ground dwellers on the forest floor and forest edge species (P. signata, P. glandulosa, A. luctuosa, O. hosii), and semiarboreal forest (riverine) species (P. baramica). Thus, the microhabitats used were not influenced by the proposed phylogenetic relationships. Partitioning of microhabitat utilization, on the other hand, was clearly seen in 2 closely related species in both vertical and substrate utilization. The study supports resource partitioning by closely related species reflected by their ecological guilds, and will be useful for conservation management of the Bornean fauna.

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Section: Discussionsupporting

confidence: 82%

Microhabitat partitioning of closely related Sarawak (Malaysian Borneo)frog species previously assigned to the genus Hylarana (Amphibia: Anura)

Zainudin

Zain²,

Ahmad³

et al. 2017

Turk J Zool

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“…The coexistence of ecologically similar species has been one of the most difficult topics to understand in ecology and has been widely studied in amphibians and reptiles (Toft 1985, Gordon 2000. Biologists have reasoned that there must be at least minimal differences in resource use by similar, co-occuring species to reduce interspecific competition and facilitate coexistence (Pianka 1974, Gordon 2000, Griffin and Silliman 2011.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the results of ecological studies of Neotropical anuran assemblages, there are important differences in the use of microhabitat, food, and time of activity among sympatric species (Toft 1985, Donnelly and Guyer 1994, Lima and Magnusson 1998, Rossa-Feres and Jim 2001. The differences can be categorized in three niche dimensions: spatial, trophic, and temporal (Schoener 1974).…”

Section: Introductionmentioning

confidence: 99%

“…The differences can be categorized in three niche dimensions: spatial, trophic, and temporal (Schoener 1974). The spatial niche is considered more important than the other dimensions in amphibians (Toft 1985, Lizana et al 1990. Specific mechanisms of microhabitat use, such as the differential use of calling sites, may facilitate optimal exploitation of available resources, allowing coexistence of species (Muñoz-Guerrero et al 2007, Vasconcelos and Rossa-Feres 2008, Blanco 2009).…”

Section: Introductionmentioning

confidence: 99%

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Uso de recursos alimentares e espaciais por dois anuros do gênero Dendropsophus (Anura: Hylidae) de La Selva, Costa Rica.

Jiménez¹,

Bolaños²

2012

Phyllomedusa

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Use of food and spatial resources by two frogs of the genus Dendropsophus (Anura: Hylidae) from La Selva, Costa Rica. Differences in the use of resources by similar species have been related to a reduction in the interspecific competition that allows coexistence. Also, other factors, such as high availability of resources in the environment, vegetation structure, environmental heterogeneity, reproductive modes, and predation, can influence the use of resources and favor coexistence. We studied the use of space and food resources by males of two species of hylid frogs, Dendropsophus ebraccatus and D. phlebodes, in two swamps in the Neotropical lowland forest at La Selva Biological Station, Costa Rica. We determined space and food use by characterizing calling sites and the diet of the frogs by stomach flushing. Males call from different substrates, and use different sizes of leaves and perch heights. Both species seem to be feeding generalists. Their diets are similar and indicate a moderate trophic niche overlap based on the type of prey consumed. Many males of both species had empty stomachs, suggesting that food resources are not an important factor affecting the coexistence of these species. Our study also indicates a lack of competitive interactions for space and food resources, and suggests that the abundant and structurally diverse vegetation provides many different vocalization sites for the male frogs and fosters coexistence of these species during the breeding season at La Selva.Keywords: calling site, coexistence, Dendropsophus ebraccatus, Dendropsophus phlebodes, diet, niche overlap. 52Phyllomedusa -11(1), June 2012Resumo Uso de recursos alimentares e espaciais por dois anuros do gênero Dendropsophus (Anura: Hylidae) de La Selva, Costa Rica. Diferenças na utilização de recursos por espécies semelhantes têm sido relacionadas com redução na competição interespecífica, que permite a coexistência. Além disso, outros fatores, como a alta disponibilidade de recursos no ambiente, a estrutura da vegetação, a heterogeneidade ambiental, os modos reprodutivos e a predação, podem influenciar o uso de recursos e favorecer a coexistência. Estudamos a utilização de recursos espaciais e alimentares por machos de duas espécies de hilídeos, Dendropsophus ebraccatus e D. phlebodes, em dois charcos da floresta tropical da Estação Biológica de La Selva, Costa Rica. Determinamos o uso do espaço e do alimento por meio da caracterização dos sítios de vocalização e da dieta (por lavagem estomacal) desses anuros. Os machos vocalizam a partir de diferentes substratos e usam folhas de tamanhos diferentes e poleiros de diferentes alturas. Ambas as espécies parecem apresentar uma dieta generalista. Suas dietas são semelhantes e indicam uma sobreposição moderada de nicho trófico no que se refere ao tipo de presa consumida. Em ambas as espécies, muitos machos apresentaram o estômago vazio, sugerindo que os recursos alimentares não são um fator importante que afeta a coexistência dessas espécies. Nosso estudo também indicou a...

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“…Diferentemente de anuros e lagartos, em que a maioria das espé-cies alimenta-se de artrópodos, as serpentes apresentam dieta muito diversificada (Greene 1997) sendo a dieta um dos principais eixos no nicho deste grupo (Toft 1985). Serpentes são animais carnívoros, que se alimentam de uma ampla variedade de presas, como minhocas, moluscos, onicóforos, aranhas, quilópodos, insetos, crustáceos, peixes, gimnofionos, anuros, lagartos, outras serpentes, tartarugas, crocodilianos, pássaros, ovos, roedores, marsupiais, morcegos (Greene 1997, Martins & Oliveira 1998.…”

Section: Introductionunclassified

Hábitos alimentares de serpentes em Espigão do Oeste, Rondônia, Brasil

Bernarde

Abe

2010

Biota Neotrop.

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Abstract:The present study reports on food habits of snakes in Espigão do Oeste, Rondônia State (Southwestern Amazonia), Brazil. Snakes were recorded by time constrained search, pitfall traps with drift fences, captures by local inhabitants, and opportunistic sightings. The snakes collected had their stomachs and intestinal contents examined. Information on food habits was obtained for 89 specimens belonging to 31 species. The majority of the 114 items found (stomach contents and field observations) were adult frogs (38%), followed by mammals (16%), lizards (15%), mollusks (13%), birds (5%), and snakes (5%). The majority of snake species from Espigão do Oeste feed on lizards, as in Central Amazonia (Manaus). A smaller proportion of snakes in the Amazonia feed upon frogs in relation to the Pantanal, South and Southeastern Brazil. These differences may be due to greater proportion of Xenodontinae in extra-Amazonian communities, as many snakes in that clade prey upon frogs. Most of the frogs and lizards species recorded in stomach contents snakes are terrestrial, which should be associated with most species of analysed snakes (52%) foraging on the ground. Keywords: Reptilia, Squamata, prey, diet, Amazonia. Resumo: O presente estudo teve como objetivo estudar os hábitos alimentares das serpentes em Espigão do Oeste, Rondônia (Sudoeste da Amazônia), Brasil. As serpentes foram registradas através de procura limitada por tempo, armadilhas de interceptação e queda, coleta por terceiros e encontros ocasionais. As serpentes coletadas tiveram o conteúdo estomacal e intestinal examinados. Em 89 espécimes pertencentes a 31 espécies de serpentes foram registradas informações sobre alimentação. Dos 114 itens registrados (conteúdos estomacais e observações na natureza), a maioria foi de anuros (38%), seguidos de mamíferos (16%), lagartos (15%), moluscos (13%), aves (5%) e serpentes (5%). A maioria das espécies de serpentes de Espigão do Oeste preda lagartos, assim como na Amazônia Central (Manaus). Uma menor proporção de serpentes na Amazônia utiliza anuros em relação às regiões do Pantanal, sul e sudeste do Brasil. Essas diferenças podem ser devidas à maior proporção de Xenodontinae nas comunidades extra-amazônicas, uma vez que muitas das serpentes desse clado predam anuros. A maioria dos anfíbios anuros e lagartos encontrados nos conteúdos estomacais das serpentes apresentam hábitos terrícolas, o que deve estar associado com a maioria das espécies de serpentes (52%) forragearem sobre o chão.

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Resource Partitioning in Amphibians and Reptiles

Cited by 408 publications

References 122 publications

Microhabitat partitioning of closely related Sarawak (Malaysian Borneo)frog species previously assigned to the genus Hylarana (Amphibia: Anura)

Microhabitat partitioning of closely related Sarawak (Malaysian Borneo)frog species previously assigned to the genus Hylarana (Amphibia: Anura)

Uso de recursos alimentares e espaciais por dois anuros do gênero Dendropsophus (Anura: Hylidae) de La Selva, Costa Rica.

Hábitos alimentares de serpentes em Espigão do Oeste, Rondônia, Brasil

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