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Artículo

Environmental or spatial components? Patterns that structure the assemblages of aquatic oligochaetes in Argentine Pampas streams

Armendáriz, Laura Cecilia; Rodriguez, MarianelaIcon ; Rodrigues Capitulo, AlbertoIcon
Fecha de publicación: 05/2022
Editorial: John Wiley & Sons Ltd
Revista: River Research And Applications
ISSN: 1535-1459
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Biología Marina, Limnología

Resumen

The metacommunity theory includes processes that contribute, at different scales, to the understanding of the distribution of organisms in space and aims to assess the relative importance of spatial and environmental factors in the structuring of communities. Fluvial ecosystems of the Argentine Pampas are characterized by their environmental heterogeneity from slow water courses and variable development of aquatic vegetation to faster courses. They are affected by the different land uses, which are among the main threats to biodiversity and alter the dispersal of the species. Forty-four species of aquatic oligochaete assemblages from 15 streams of nine Pampean basins were seasonally analyzed. The assemblages were characterized through estimations of taxonomic richness, α and β diversity. No differences were found in the assemblages of the substrates (sediments and aquatic vegetation) within each stream, except for Juan Blanco stream. However, differences were found between streams, as well as between basins. The oligochaetes that contributed most to the dissimilarity among streams and basins were Nais communis, Limnodrilus hoffmeisteri, Dero obtusa, and Stylaria fossularis. Two groups of sites were identified through the analysis of canonical correspondence: those of mountain basins and those of lowland basins. The variance partitioning showed that local environmental conditions (acting as environmental filters) accounted for 15.64% in the ordering of the assemblages, while 14.60% was explained by altitude and geographic factors (as a dispersal limitation). These results help to understand the processes that organize the distribution of organisms at different scales, which could have important implications when making decisions regarding biomonitoring and conservation.
Palabras clave: DIVERSITY , FLUVIAL SYSTEMS , METACOMMUNITIES , MULTIVARIATE METHODS , VARIANCE PARTITIONING
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/168415
URL: http://mc.manuscriptcentral.com/rra
DOI: http://dx.doi.org/10.1002/rra.3934
Colecciones
Articulos(ILPLA)
Articulos de INST.DE LIMNOLOGIA "DR. RAUL A. RINGUELET"
Citación
Armendáriz, Laura Cecilia; Rodriguez, Marianela; Rodrigues Capitulo, Alberto; Environmental or spatial components? Patterns that structure the assemblages of aquatic oligochaetes in Argentine Pampas streams; John Wiley & Sons Ltd; River Research And Applications; 38; 4; 5-2022; 684-695
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