Abstract
Spatial and environmental processes influence species composition at distinct scales. Previous studies suggested that the distribution of larval anurans at the landscape-scale is influenced by environmental gradients related to adult breeding site selection, such as pond canopy cover, but not by water chemistry. However, the combined effects of spatial, pond morphology, and water chemistry variables on metacommunity structure of larval anurans have not been analyzed yet. We used a partial redundancy analysis with variation partitioning to analyze the relative influence of pond morphology (e.g., depth, area, and aquatic vegetation), water chemistry, and spatial variables on a tadpole metacommunity from southeastern Brazil. We predict that pond morphology and canopy cover will influence the metacommunity at broad spatial scales, while water chemistry would play a larger role at finer scales. We found that broad-scale spatial patterns of pond canopy cover and pond morphology strongly influenced metacommunity structure, with water chemistry being not significant. Additionally, species composition was spatially autocorrelated at short distances. We suggest that the reproductive behavior of adult anurans is driving tadpole metacommunity dynamics, since pond morphology, but not water chemistry affects breeding site selection by adults. Our results contribute to the understanding of amphibian species diversity in tropical wetlands.
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Acknowledgments
We are indebted to M. Almeida Neto, F. Altermatt, L. M. Bini, J. W. Fox, V. L. Landeiro, G. F. Livingston, T. F. Rangel, and T. Siqueira for providing useful insights to this manuscript. A. Bispo and B. Vilela helped with the map. IBAMA provided collecting permits (#14474) and the staff of the Serra da Bocaina National Park kindly provided logistical support and housing. This paper is part of DBP master’s-thesis at the graduate program in Biologia Animal, supported by fellowships from FAPESP (#2008/55744-6) and CAPES-DS. We greatly acknowledge the input received from L.C. Schiesari and L. Casatti as members of DBP’s examining committee. MVG and TG-S were supported by FAPESP doctoral fellowships (#2008/50575-1, 2008/58979-4, respectively). DCRF thanks FAPESP (2010/52321-7) and CNPq (563075/2010-4). IAM was supported by a Jovem Pesquisador Grant from FAPESP (01/13341-3 and 06/56007-0). During the final preparation of the manuscript, DBP was supported by a CAPES-DS and CAPES-PDSE doctoral fellowships. We also thank all those who helped in the field and lab work. Voucher specimens are housed at the tadpole collection of DZSJRP-UNESP.
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Hypsiboas sp. (aff. polytaenius) was formally described as Hypsiboas bandeirantes, Caramaschi and Cruz, 2013.
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Provete, D.B., Gonçalves-Souza, T., Garey, M.V. et al. Broad-scale spatial patterns of canopy cover and pond morphology affect the structure of a Neotropical amphibian metacommunity. Hydrobiologia 734, 69–79 (2014). https://doi.org/10.1007/s10750-014-1870-0
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DOI: https://doi.org/10.1007/s10750-014-1870-0