Please use this identifier to cite or link to this item: http://dspace.utpl.edu.ec/jspui/handle/123456789/19104
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dc.contributor.authorCabrera Cisneros, H.es_ES
dc.contributor.authorEspinosa íñiguez, C.es_ES
dc.date.accessioned2017-06-16T22:02:57Z-
dc.date.available2017-06-16T22:02:57Z-
dc.date.issued2014-01-01es_ES
dc.date.submitted30/07/2014es_ES
dc.identifier10.1111/jbi.12377es_ES
dc.identifier.isbn3050270es_ES
dc.identifier.other10.1111/jbi.12377es_ES
dc.identifier.urihttp://dspace.utpl.edu.ec/handle/123456789/19104-
dc.description.abstractAim: Geographical, climatic and soil factors are major drivers of plant beta diversity, but their importance for dryland plant communities is poorly known. The aim of this study was to: (1) characterize patterns of beta diversity in global drylands; (2) detect common environmental drivers of beta diversity; and (3) test for thresholds in environmental conditions driving potential shifts in plant species composition. Location: Global. Methods: Beta diversity was quantified in 224 dryland plant communities from 22 geographical regions on all continents except Antarctica using four complementary measures: the percentage of singletons (species occurring at only one site); Whittaker's beta diversity, ?(W); a directional beta diversity metric based on the correlation in species occurrences among spatially contiguous sites, ?(R2); and a multivariate abundance-based metric, ?(MV). We used linear modelling to quantify the relationships between these metrics of beta diversity and geographical, climatic and soil variables. Results: Soil fertility and variability in temperature and rainfall, and to a lesser extent latitude, were the most important environmental predictors of beta diversity. Metrics related to species identity [percentage of singletons and ?(W)] were most sensitive to soil fertility, whereas those metrics related to environmental gradients and abundance [(?(R2) and ?(MV)] were more associated with climate variability. Interactions among soil variables, climatic factors and plant cover were not important determinants of beta diversity. Sites receiving less than 178 mm of annual rainfall differed sharply in species composition from more mesic sites (> 200 mm). Main conclusions: Soil fertility and variability in temperature and rainfall are the most important environmental predictors of variation in plant beta diversity in global drylands. Our results suggest that those sites annually receiving c. 178 mm of rainfall will be especially sensitive to future climate changes. These findings may help to define appropriate conservation strategies for mitigating effects of climate change on dryland vegetationes_ES
dc.languageIngléses_ES
dc.subjectAridityes_ES
dc.subjectBeta diversityes_ES
dc.subjectClimatic variabilityes_ES
dc.subjectGlobal environmental changees_ES
dc.subjectHabitat filteringes_ES
dc.subjectLatitudinal gradientes_ES
dc.subjectPlant community assemblyes_ES
dc.subjectRegression analysises_ES
dc.subjectSoil fertilityes_ES
dc.subjectSpatial soil heterogeneityes_ES
dc.titleClimate and soil attributes determine plant species turnover in global drylandses_ES
dc.typeArticlees_ES
dc.publisherJournal of Biogeographyes_ES
Appears in Collections:Artículos de revistas Científicas



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