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dc.contributor.authorRey Benayas, José María es_ES
dc.contributor.authorScheiner, Samuel M.
dc.identifier.bibliographicCitationJournal of Vegetation Science, 2002, v. 13, n. 2, p. 245-258en
dc.descriptionLas figuras que contiene el documento se localizan al final del mismoes_ES
dc.description.abstractWe associated patterns of plant diversity with pos- sible causal factors by considering 93 local regions in the Iberian Peninsula and Balearic Islands with respect to biogeo- graphy, environmental favourability, and environmental hetero- geneity, and their relationship with measured species diversity at four different scales: mean local species richness standard- ized at a grain of 100 m 2 , total species richness in a community type within a region (regional community richness), mean compositional similarity, and mosaic diversity. Local regions in biogeographic transition zones to the North African and Atlantic floras had higher regional commu- nity richness and greater mosaic diversity than did non-transi- tional regions, whereas no differences existed in mean local species richness or mean compositional similarity. Mean local species richness was positively related to environmental fa- vourability as measured by actual evapotranspiration, but negatively related to total precipitation and temporal heteroge- neity in precipitation. Mean local species richness was great- est in annual grassland and dwarf shrubland communities, and on calcareous bedrock types. Regional community richness was similarly related to actual evapotranspiration and total precipitation, but in addition was positively related to spatial heterogeneity in topography and soil water holding capacity. Mean compositional similarity decreased with increasing spa- tial heterogeneity and temperature seasonality. Mosaic diver- sity, a measure of complexity, increased with increasing local and regional richness. We hypothesize that these relationships can be explained by four ecological and evolutionary classes of causal factors: nu mbers of individuals, intermediate environments, limits to adaptation, and niche variation. These factors operate at various scales and manifest themselves in various ways. For example, at the site level, apparently processes that increase the number of individuals increase mean local species richness, but at the level of the entire region no such effects were founden
dc.description.sponsorshipWe are deeply indebted to Íñigo Vázquez- Dodero for his assistance in the early stages of this study. Jose M. Rey Arnaiz provided climate data. Emilio Chuvieco pro- vided the remote sensing data. Julio Álvarez, Javier Amigo, Carmen Bartolomé, and Marcelino de la Cruz provided useful information for finding data sets. Manuel Segura and Javier Temiño assisted with the classification of bedrock and soil types. Diana Piorno, Carmen Pineda, and Francisco Bermejo assisted with data entry. Meelis Pärtel, Mike Willig, Brad Hawkins, Sandra Lavorel, Jane Franklin, and R.M. Cowling provided comments about a previous version of this manu- script. This study was funded by the “Determinantes de la diversidad biológica en ecosistemas mediterráneos. Papel de los procesos locales y regionales” project (CICYT AMB96- 1161), and additionally supported by the ”Factores limitantes de la revegetación con especies leñosas autóctonas de áreas degradadas en ambientes mediterráneos. Rendimiento de distintas actuaciones de manejo” project (CICYT REN 2000 745). Travel by J.M.R.B. and S.M.S. was funded by the Universidad de Alcalá. The views expressed in this paper do not necessarily reflect those of the National Science Founda- tion or the United States Governmenten
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Españaes_ES
dc.rights(c) The International Association of Vegetation Science, 2002en
dc.subjectAvailable energyen
dc.subjectCommunity typeen
dc.subjectEnvironmental heterogeneityen
dc.subjectGlobal changeen
dc.subjectMosaic diversityen
dc.subjectSoil typeen
dc.subjectSpecies richnessen
dc.subjectTransition zoneen
dc.titlePlant diversity, biogeography and environment in Iberia: Patterns and possible causal factorsen
dc.subject.ecienciaMedio Ambientees_ES
dc.subject.ecienciaEnvironmental scienceen
dc.contributor.affiliationUniversidad de Alcalá. Departamento de Ciencias de la Vida. Unidad docente Ecologíaes_ES
dc.relation.projectIDAMB96-1161 (Comisión Interministerial de Ciencia y Tecnología-CICYT)
dc.relation.projectIDREN2000-745 (Comisión Interministerial de Ciencia y Tecnología-CICYT)

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