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Descripción
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| Agricultural practices are predicted to increase plant virus transmission and infection risk, as they reduce biodiversity and alter host species community composition in agricultural ecosystems, conditions that promote infection heterogeneity. Large-scale studies of the ecological processes underlying infection heterogeneity and pathogen transmission have shown that the evolution of virulence and resistance can differ at local scales among host communities. However, biases derived from species identification, and environmental variation among experimental sites, may interfere with predictions of infection risk and transmission dynamics. We tested the hypothesis that spatial variation among sites representing four habitats within a diversity gradient in an agroecosystem in central Spain, interferes with the prediction of infection distributions. Species relative abundance, and spatial and environmental variables were used in a multivariate autocorrelation approach to test plant community distinctions among habitats. We then selected the more explanatory spatial variables and simulated infection prevalence data to use in predictive models. Multivariate tests showed that there was significant spatial structuring among the study sites at fine spatial scales. Models showed that a random factor for habitat had a strong effect on the prevalence-diversity relationships, but which showed non-significant spatial effects. These findings validated our habitat categories, but also demonstrated that the spatial predictor could be used as a proxy variable for variation in host species community composition among experimental sites. Models were then tested against data of virus prevalence in the analysed field sites. | |
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Internacional
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No |
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Nombre congreso
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XIX Congreso de la Sociedad Española de Fitopatología |
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Tipo de participación
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960 |
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Lugar del congreso
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Toledo |
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Revisores
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Si |
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ISBN o ISSN
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000-00-0000-000-0 |
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DOI
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Fecha inicio congreso
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08/10/2018 |
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Fecha fin congreso
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10/10/2018 |
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Desde la página
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55 |
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Hasta la página
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55 |
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Título de las actas
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Libro de Resumenes |