How large is large enough for insects? Forest fragmentation effects at three spatial scales

Ribas, Carla R.; Sobrinho, Tathiana G.; Schoereder, José H.; Sperber, Carlos Frankl; Lopes‐Andrade, Cristiano; Soares, Silvete Mari

doi:10.1016/j.actao.2004.08.008

Cited by 64 publications

(39 citation statements)

References 32 publications

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“…Ribas et al (2005) observed that the total number of species in many small remnants (varying from 3.21 ha to 5.56 ha) was not significantly different from the species number in a large remnant (30.13 ha). Results were different for crickets, which had higher species richness in smaller remnants (Ribas et al 2005). These results show that area and habitat fragmentation effects could indeed be observed in different scales Loyola & Martins 2008), and that different taxonomic groups can show diverse responses.…”

Section: Discussionmentioning

confidence: 81%

“…In Central Amazon, bee species richness increased with area size, even in remnants smaller than 40 ha (Morato & Campos 2000). Ribas et al (2005) observed that the total number of species in many small remnants (varying from 3.21 ha to 5.56 ha) was not significantly different from the species number in a large remnant (30.13 ha). Results were different for crickets, which had higher species richness in smaller remnants (Ribas et al 2005).…”

Section: Discussionmentioning

confidence: 85%

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Small-scale area effect on species richness and nesting occupancy of cavity-nesting bees and wasps

Loyola¹,

Martins²

2011

Rev. Bras. entomol.

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Small-scale area effect on species richness and nesting occupancy of cavity-nesting bees and wasps. The research was conducted in an urban forest remnant in southeast Brazil. We tested the predictions of the following hypotheses: (1) larger areas present higher species richness of bees and wasps, (2) solitary bees and wasps occupy more nests in larger areas, (3) rare species occupy more nests in smaller areas. We sampled Aculeate bees and wasps using trap nests from February to November 2004. We placed trap nests in sampling units (SU) with different size (25, 100 and 400 m²) located in 6 ha of secondary mesophytic forest. One hundred and thirty-seven trap nests were occupied by seven species of bees and four species of wasps. We found an increase in wasp, but not bee species richness following increase in SU size. Hymenoptera richness (i.e. bees plus wasps) was also greater in larger SU. Both the number and density of occupied nests increased with SU size. The wasp Trypoxylon lactitarse responded significantly to area size, larger SU having more occupied nests. The same pattern was exhibited by the wasp Auplopus militaris, the Megachile bee species, and the bee Anthodioctes megachiloides. Only Trypoxylon sp. was not affected by SU size. Our results show that cavity-nesting bee and wasps respond differently to the area effects. Such findings must be complemented by information on the frequency and dynamics of area colonization and nest occupancy by species of solitary Hymenoptera.
Efeito de área em pequena escala sobre a riqueza e comportamento de nidificação de abelhas e vespas solitárias. Este trabalho foi realizado em fragmento florestal urbano localizado na região sudeste do Brasil. Foram testadas as predições das seguintes hipóteses: (1) áreas maiores apresentam maior riqueza de espécies de abelhas e vespas que nidificam em cavidades pré-existentes, (2) espécies de abelhas e vespas que nidificam em cavidades pré-existentes ocupam mais ninhos em áreas maiores, (3) espécies raras ocupam mais ninhos em áreas menores. Estes insetos foram amostrados por meio de ninhos-armadilha de fevereiro a novembro de 2004. As armadilhas foram dispostas em unidades amostrais com diferentes tamanhos (25, 100 e 400 m²), alocadas em um fragmento de floresta mesofítica de 6 ha. Cento e trinta e sete armadilhas foram ocupadas por sete espécies de abelhas e quatro espécies de vespa. Observamos um aumento na riqueza de vespas associado a uma maior área amostral; não observamos o mesmo para abelhas. A riqueza de espécies de Hymenoptera (abelhas e vespas, em conjunto) foi maior em áreas maiores. Tanto a abundância quanto a densidade de ninhos ocupados por abelhas e vespas aumentou com o aumento da unidade amostral. Trypoxylon lactitarse ocorreu mais frequentemente em áreas maiores. O mesmo padrão foi observado para Auplopus militaris, espécies do gênero Megachile e Anthodioctes megachiloides. Apenas Trypoxylon sp. não foi afetada pelo tamanho da unidade amostral. Os resultados do estudo mostram que abelhas e vespas solitárias respon...

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 85%

Small-scale area effect on species richness and nesting occupancy of cavity-nesting bees and wasps

Loyola¹,

Martins²

2011

Rev. Bras. entomol.

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“…São ainda utilizados para comportamento territorial e reprodutivo (bateman & FerGuson 2004) e também da ecologia (sPerber et al 2003;ribas et al 2005).…”

Section: Resultsunclassified

Ocorrência do Grilo Endecous em Quatro Cavernas no Município de Uruará - PA, Brasil

Cajaíba

2012

EntomoBrasilis

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“…An increase in the abundance of herbivores at disturbed sites may be attributed to increased primary production caused by light conditions in tree-fall gaps, although decreases in herbivore abundance have been reported under severe disturbance (Schowalter and Ganio 1999). Decreased carnivore abundance in disturbed canopy and floor communities may reflect their low migration ability (Ribas et al 2005). …”

Section: Discussionmentioning

confidence: 99%

Functional spatial scale of community composition change in response to windthrow disturbance in a deciduous temperate forest

Hirao

Murakami

Oguma

2007

Ecological Research

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Community dynamics in local habitats are affected by landscape characteristics such as the area and connectivity of surrounding habitats at a functional spatial scale where the community responds to landscape structure. However, the functional spatial scale at which community composition is affected by landscape structure has never been explored. We assessed the functional spatial scales of composition change in birds and in three types of arthropod communities (canopy, forest-floor and flying ones) with regard to landscape heterogeneity resulting from a large typhoon in a temperate forest of Japan.We examined the effects of tree-fall disturbance on the communities at various spatial scales, with special attention to compositional evenness. The spatial scale of the best-fitting model, which was selected from models fitted to the disturbance area at stepwise spatial scales, was interpreted as the community-specific functional spatial scale.The composition of all communities studied was all significantly dependent on gap area.

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How large is large enough for insects? Forest fragmentation effects at three spatial scales

Cited by 64 publications

References 32 publications

Small-scale area effect on species richness and nesting occupancy of cavity-nesting bees and wasps

Small-scale area effect on species richness and nesting occupancy of cavity-nesting bees and wasps

Ocorrência do Grilo Endecous em Quatro Cavernas no Município de Uruará - PA, Brasil

Functional spatial scale of community composition change in response to windthrow disturbance in a deciduous temperate forest

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