RT info:eu-repo/semantics/article
T1 Plant diversity, biogeography and environment in Iberia: Patterns and possible causal factors
A1 Rey Benayas, José María
A1 Scheiner, Samuel M.
K1 Available energy
K1 Community type
K1 Environmental heterogeneity
K1 Global change
K1 Mosaic diversity
K1 Resource
K1 Scale
K1 Soil type
K1 Species richness
K1 Transition zone
K1 Ciencia
K1 Medio Ambiente
K1 Science
K1 Environmental science
AB We associated patterns of plant diversity with pos-sible causal factors by considering 93 local regions in theIberian Peninsula and Balearic Islands with respect to biogeo-graphy, environmental favourability, and environmental hetero-geneity, and their relationship with measured species diversityat four different scales: mean local species richness standard-ized at a grain of 100 m2, total species richness in a communitytype within a region (regional community richness), meancompositional similarity, and mosaic diversity.Local regions in biogeographic transition zones to theNorth 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 localspecies richness or mean compositional similarity. Mean localspecies richness was positively related to environmental fa-vourability as measured by actual evapotranspiration, butnegatively related to total precipitation and temporal heteroge-neity in precipitation. Mean local species richness was great-est in annual grassland and dwarf shrubland communities, andon calcareous bedrock types. Regional community richnesswas similarly related to actual evapotranspiration and totalprecipitation, but in addition was positively related to spatialheterogeneity 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 localand regional richness.We hypothesize that these relationships can be explainedby four ecological and evolutionary classes of causal factors:numbers of individuals, intermediate environments, limits toadaptation, and niche variation. These factors operate at variousscales and manifest themselves in various ways. For example, atthe site level, apparently processes that increase the number ofindividuals increase mean local species richness, but at the levelof the entire region no such effects were found
PB Wiley
SN 1100-9233
YR 2002
FD 2002
LK http://hdl.handle.net/10017/23039
UL http://hdl.handle.net/10017/23039
LA eng
NO Las figuras que contiene el documento se localizan al final del mismo
NO We are deeply indebted to Íñigo Vázquez-Dodero for his assistance in the early stages of this study. JoseM. 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 usefulinformation for finding data sets. Manuel Segura and JavierTemiño assisted with the classification of bedrock and soiltypes. Diana Piorno, Carmen Pineda, and Francisco Bermejoassisted with data entry. Meelis Pärtel, Mike Willig, BradHawkins, Sandra Lavorel, Jane Franklin, and R.M. Cowlingprovided comments about a previous version of this manu-script. This study was funded by the “Determinantes de ladiversidad biológica en ecosistemas mediterráneos. Papel delos procesos locales y regionales” project (CICYT AMB96-1161), and additionally supported by the ”Factores limitantesde la revegetación con especies leñosas autóctonas de áreasdegradadas en ambientes mediterráneos. Rendimiento dedistintas actuaciones de manejo” project (CICYT REN 2000745). Travel by J.M.R.B. and S.M.S. was funded by theUniversidad de Alcalá. The views expressed in this paper donot necessarily reflect those of the National Science Founda-tion or the United States Government
DS MINDS@UW
RD 29-abr-2024