Local and Landscape Factors Driving the Structure of Tropical Anuran Communities: Do Ephemeral Ponds have a Nested Pattern?

被引:18
作者
Almeida-Gomes, Mauricio [1 ]
Rocha, Carlos F. D. [2 ]
Vieira, Marcus V. [1 ]
机构
[1] Univ Fed Rio de Janeiro, Lab Vertebrados, Dept Ecol, Ave Carlos Chagas Filho 373,Cidade Univ, BR-21941902 Rio De Janeiro, RJ, Brazil
[2] Univ Estado Rio de Janeiro, Lab Vertebrados, Rua Sao Francisco Xavier 524, BR-20550900 Rio De Janeiro, RJ, Brazil
关键词
Amphibian conservation; Atlantic Forest; frogs; landscape connectivity; nestedness; reproductive habitats; ATLANTIC FOREST; SPECIES DISTRIBUTION; AMPHIBIAN DIVERSITY; REPRODUCTIVE MODES; MOVEMENT PATTERNS; SCATTERED TREES; GENE FLOW; HABITAT; FROG; DYNAMICS;
D O I
10.1111/btp.12285
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
The sets of species in animal and plant communities often comprise nested subsets of the species in broader communities. Although most mechanisms causing nested patterns are known and have been demonstrated for different environments and taxa, how amphibian communities are structured in ephemeral ponds in tropical disturbed landscapes remains unknown. We investigated if pond size, duration, presence of trees (local factors), and the proportion of forest cover surrounding ponds (landscape factor) affect anuran species richness and composition, and if pond assemblages showed a nested pattern. We sampled 11 ephemeral ponds in a pasture matrix near a large Atlantic Forest remnant in Brazil and measured local and landscape variables inside two buffer zones around each pond (100 and 500m). We marked 1514 individuals from 23 anuran species, and found that richness in ponds ranged from 3-14 species. Both local and landscape factors explained frog species richness in the sampled ponds, and seemed to affect community composition. Frog communities occurred in a non-nested pattern, contrary to our expectations: species found in poor subsets were not found in larger, more complex ponds. Local and landscape characteristics create a variety of environments in ephemeral ponds, even in impoverished ones; these characteristics restrict pond occupancy for some species, and result in a non-nested pattern. Resumo Os conjuntos de especies em comunidades animais e vegetais muitas vezes compreendem subconjuntos aninhados das especies em comunidades mais amplas. Embora a maioria dos mecanismos causadores de padroes aninhados sejam conhecidos e ja tenham sido demonstrados para diferentes tipos de ambientes e taxons, ainda e desconhecido como as comunidades de anfibios estAo estruturadas em pocas temporarias em paisagens tropicais perturbadas. Investigamos se o tamanho da poca, sua duracAo e a presenca de arvores (fatores locais) e a proporcAo de cobertura florestal no entorno das pocas (fator da paisagem) afetariam a riqueza e composicAo de especies de anuros e se as assembleias das pocas apresentam um padrAo aninhado. Amostramos 11 pocas temporarias em uma matriz de pasto proxima a um grande remanescente florestal de Mata Atlantica no Brasil. As variaveis locais e da paisagem foram medidas dentro de duas zonas-tampAo consideradas ao redor de cada poca (100 and 500m). Foram marcados um total de 1514 individuos de 23 especies de anuros, e a riqueza nas pocas variou de tres a 14 especies. Ambas variaveis locais e da paisagem explicaram a riqueza de especies de anfibios nas pocas amostradas, e parece tambem afetar a composicAo da comunidade. As comunidades de anfibios estavam estruturadas em um padrAo nAo aninhado, contrario ao esperado por nos: especies encontradas em subconjuntos com poucas especies nAo foram encontradas nas pocas maiores e mais complexas. Caracteristicas locais e da paisagem criam uma variedade de ambientes em pocas temporarias, mesmo nas mais empobrecidas, o que impoe uma restricAo a ocupacAo de pocas por algumas especies, e resulta em um padrAo nAo aninhado.
引用
收藏
页码:365 / 372
页数:8
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