Drivers of assemblage-wide calling activity in tropical anurans and the role of temporal resolution

Autor(es)

Sugai, Larissa S. M. ^{[1, 2, 3]} ; Silva, Thiago S. F. ^{[1, 4]} ; Llusia, Diego ^{[5, 2, 3]} ; Siqueira, Tadeu ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Inst Biociencias, Rio Claro - Brazil

^[2] Univ Autonoma Madrid, Dept Ecol, Terr Ecol Grpiadd, Fac Ciencias, Madrid - Spain

^[3] Univ Autonoma Madrid, Ctr Invest Biodiversidad & Cambio Global, Madrid - Spain

^[4] Univ Stirling, Fac Nat Sci, Biol & Environm Sci, Stirling - Scotland

^[5] Univ Fed Goias, Inst Ciencias Biol, Dept Ecol, Lab Herpetol & Comportamento Anim, Goiania, Go - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Animal Ecology; v. 90, n. 3 DEC 2020.
• Citações Web of Science: 0

Resumo

Temporal scale in animal communities is often associated with seasonality, despite the large variation in species activity during a diel cycle. A gap thus remains in understanding the dynamics of short-term activity in animal communities. Here we assessed calling activity of tropical anurans and addressed how species composition varied during night activity in assemblages along gradients of local and landscape environmental heterogeneity. We investigated 39 anuran assemblages in the Pantanal wetlands (Brazil) with passive acoustic monitoring during the peak of one breeding season, and first determined changes in species composition between night periods (early, mid and late) using two temporal resolutions (1- and 3-hr intervals). Then, we addressed the role of habitat structure (local and landscape heterogeneity variables from field-based and remote sensing metrics) and ecological context (species richness and phylogenetic relatedness) in determining changes in species composition (a) between night periods and (b) across days. Nocturnal calling activity of anuran assemblages varied more within the 1-hr resolution than the 3-hr resolution. Differences in species composition between early- and late-night periods were related to local habitat structure and phylogenetic relatedness, while a low variation in compositional changes across days was associated with low-heterogeneous landscapes. None of these relationships were observed using the coarser temporal resolution (3 hr). Our findings on the variation of calling activity in tropical anuran assemblages suggest potential trade-offs mediated by fine-temporal partitioning. Local and landscape heterogeneity may provide conditions for spatial partitioning, while the relatedness among co-signalling species provides cues on the ecological overlap of species with similar requirements. These relationships suggest a role of niche dimensional complementarity on the structuring of these anuran assemblages over fine-temporal scales. We argue that fine-temporal differences between species in breeding activity can influence the outcome of species interaction and thus, addressing temporal scaling issues can improve our understanding of the dynamics of animal communities. (AU)

• Processo FAPESP: 17/15772-0 - A dimensão acústica das comunidades biológicas: Processos estruturantes Evolutivos e Ecológicos
• Beneficiário: Larissa Sayuri Moreira Sugai
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 15/25316-6 - Comunidades acústicas: Processos estruturantes e implicações para mecanismos de montagem de comunidades
• Beneficiário: Larissa Sayuri Moreira Sugai
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 19/04033-7 - Persistência de metacomunidades em ecossistemas altamente variáveis
• Beneficiário: Tadeu de Siqueira Barros
• Modalidade de apoio: Bolsas no Exterior - Pesquisa