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Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes

Aiming to elucidate whether large-scale dispersal factors or environmental species sorting prevail in determining patterns of Trichoptera species composition in mountain lakes, we analyzed the distribution and assembly of the most common Trichoptera (Plectrocnemia laetabilis, Polycentropus flavomacu...

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Autores principales: de Mendoza, Guillermo, Ventura, Marc, Catalan, Jordi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons, Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4523350/
https://www.ncbi.nlm.nih.gov/pubmed/26257867
http://dx.doi.org/10.1002/ece3.1522
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author de Mendoza, Guillermo
Ventura, Marc
Catalan, Jordi
author_facet de Mendoza, Guillermo
Ventura, Marc
Catalan, Jordi
author_sort de Mendoza, Guillermo
collection PubMed
description Aiming to elucidate whether large-scale dispersal factors or environmental species sorting prevail in determining patterns of Trichoptera species composition in mountain lakes, we analyzed the distribution and assembly of the most common Trichoptera (Plectrocnemia laetabilis, Polycentropus flavomaculatus, Drusus rectus, Annitella pyrenaea, and Mystacides azurea) in the mountain lakes of the Pyrenees (Spain, France, Andorra) based on a survey of 82 lakes covering the geographical and environmental extremes of the lake district. Spatial autocorrelation in species composition was determined using Moran’s eigenvector maps (MEM). Redundancy analysis (RDA) was applied to explore the influence of MEM variables and in-lake, and catchment environmental variables on Trichoptera assemblages. Variance partitioning analysis (partial RDA) revealed the fraction of species composition variation that could be attributed uniquely to either environmental variability or MEM variables. Finally, the distribution of individual species was analyzed in relation to specific environmental factors using binomial generalized linear models (GLM). Trichoptera assemblages showed spatial structure. However, the most relevant environmental variables in the RDA (i.e., temperature and woody vegetation in-lake catchments) were also related with spatial variables (i.e., altitude and longitude). Partial RDA revealed that the fraction of variation in species composition that was uniquely explained by environmental variability was larger than that uniquely explained by MEM variables. GLM results showed that the distribution of species with longitudinal bias is related to specific environmental factors with geographical trend. The environmental dependence found agrees with the particular traits of each species. We conclude that Trichoptera species distribution and composition in the lakes of the Pyrenees are governed predominantly by local environmental factors, rather than by dispersal constraints. For boreal lakes, with similar environmental conditions, a strong role of dispersal capacity has been suggested. Further investigation should address the role of spatial scaling, namely absolute geographical distances constraining dispersal and steepness of environmental gradients at short distances.
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spelling pubmed-45233502015-08-07 Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes de Mendoza, Guillermo Ventura, Marc Catalan, Jordi Ecol Evol Original Research Aiming to elucidate whether large-scale dispersal factors or environmental species sorting prevail in determining patterns of Trichoptera species composition in mountain lakes, we analyzed the distribution and assembly of the most common Trichoptera (Plectrocnemia laetabilis, Polycentropus flavomaculatus, Drusus rectus, Annitella pyrenaea, and Mystacides azurea) in the mountain lakes of the Pyrenees (Spain, France, Andorra) based on a survey of 82 lakes covering the geographical and environmental extremes of the lake district. Spatial autocorrelation in species composition was determined using Moran’s eigenvector maps (MEM). Redundancy analysis (RDA) was applied to explore the influence of MEM variables and in-lake, and catchment environmental variables on Trichoptera assemblages. Variance partitioning analysis (partial RDA) revealed the fraction of species composition variation that could be attributed uniquely to either environmental variability or MEM variables. Finally, the distribution of individual species was analyzed in relation to specific environmental factors using binomial generalized linear models (GLM). Trichoptera assemblages showed spatial structure. However, the most relevant environmental variables in the RDA (i.e., temperature and woody vegetation in-lake catchments) were also related with spatial variables (i.e., altitude and longitude). Partial RDA revealed that the fraction of variation in species composition that was uniquely explained by environmental variability was larger than that uniquely explained by MEM variables. GLM results showed that the distribution of species with longitudinal bias is related to specific environmental factors with geographical trend. The environmental dependence found agrees with the particular traits of each species. We conclude that Trichoptera species distribution and composition in the lakes of the Pyrenees are governed predominantly by local environmental factors, rather than by dispersal constraints. For boreal lakes, with similar environmental conditions, a strong role of dispersal capacity has been suggested. Further investigation should address the role of spatial scaling, namely absolute geographical distances constraining dispersal and steepness of environmental gradients at short distances. John Wiley & Sons, Ltd 2015-07 2015-06-01 /pmc/articles/PMC4523350/ /pubmed/26257867 http://dx.doi.org/10.1002/ece3.1522 Text en © 2015 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. http://creativecommons.org/licenses/by/4.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
de Mendoza, Guillermo
Ventura, Marc
Catalan, Jordi
Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes
title Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes
title_full Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes
title_fullStr Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes
title_full_unstemmed Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes
title_short Environmental factors prevail over dispersal constraints in determining the distribution and assembly of Trichoptera species in mountain lakes
title_sort environmental factors prevail over dispersal constraints in determining the distribution and assembly of trichoptera species in mountain lakes
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4523350/
https://www.ncbi.nlm.nih.gov/pubmed/26257867
http://dx.doi.org/10.1002/ece3.1522
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