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Artículo

Environmental drivers of ant species richness and composition across the Argentine Pampas grassland

Ramos, Carolina SamantaIcon ; Bellocq, Maria IsabelIcon ; Paris, Carolina Ivon; Filloy, JulietaIcon
Fecha de publicación: 06/2018
Editorial: Wiley Blackwell Publishing, Inc
Revista: Austral Ecology
ISSN: 1442-9985
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Ecología

Resumen

Understanding the underlying mechanisms causing diversity patterns is a fundamental objective in ecology and science-based conservation biology. Energy and environmental-heterogeneity hypotheses have been suggested to explain spatial changes in ant diversity. However, the relative roles of each one in determining alpha and beta diversity patterns remain elusive. We investigated the main factors driving spatial changes in ant (Hymenoptera, Formicidae) species richness and composition (including turnover and nestedness components) along a 500 km longitudinal gradient in the Pampean region of Argentina. Ants were sampled using pitfall traps in 12 sample sites during the summer. We performed a model selection approach to analyse responses of ant richness and composition dissimilarity to environmental factors. Then, we computed a dissimilarity partitioning of the contributions of spatial turnover and nestedness to total composition dissimilarity. Temporal habitat heterogeneity and temperature were the primary factors explaining spatial patterns of epigean ant species richness across the Pampas. The distance decay in species composition similarity was best accounted by temperature dissimilarity, and turnover had the greatest contribution to the observed beta diversity pattern. Our findings suggest that both energy and environmental-heterogeneity-related variables are key factors shaping richness patterns of ants and niche-based processes instead of neutral processes appear to be regulating species composition of ant assemblages. The major contribution of turnover to the beta diversity pattern indicated that lands for potential reconversion to grassland should represent the complete environmental gradient of the Pampean region, instead of prioritizing a single site with high species richness.
Palabras clave: DIVERSITY PATTERNS , ENERGY , ENVIRONMENTAL HETEROGENEITY , NESTEDNESS , TURNOVER
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info:eu-repo/semantics/openAccess 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/11336/96627
URL: https://onlinelibrary.wiley.com/doi/epdf/10.1111/aec.12579
DOI: https://doi.org/10.1111/aec.12579
Colecciones
Articulos(IEGEBA)
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Citación
Ramos, Carolina Samanta; Bellocq, Maria Isabel; Paris, Carolina Ivon; Filloy, Julieta; Environmental drivers of ant species richness and composition across the Argentine Pampas grassland; Wiley Blackwell Publishing, Inc; Austral Ecology; 43; 4; 6-2018; 424-434
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