@misc{GarciadelaRivaArenasVillaretal., author = {Garcia de la Riva, Enrique and Arenas, Maribel and Villar, Rafael and Garcia-Oliva, Felipe and Oyama, Ken}, title = {El papel de la evapotranspiraci{\´o}n en la distribuci{\´o}n funcional foliar de 28 especies del g{\´e}nero Quercus de Espa{\~n}a y M{\´e}xico}, series = {Ecosistemas}, volume = {28}, journal = {Ecosistemas}, number = {3}, issn = {1697-2473}, pages = {199 -- 207}, abstract = {El g{\´e}nero Quercus constituye el grupo de especies le{\~n}osas m{\´a}s importante del hemisferio norte, con una amplia distribuci{\´o}n tanto en Espa{\~n}a como en M{\´e}xico. El estudio de sus rasgos funcionales nos permite conocer su grado de diversificaci{\´o}n y su adaptaci{\´o}n al medio, as{\´i} como las limitaciones morfol{\´o}gicas y fisiol{\´o}gicas que restringen su evoluci{\´o}n. El principal objetivo del presente estudio es comprender como se segregan los rasgos funcionales foliares dentro del g{\´e}nero Quercus, y que factores determinan dicha segregaci{\´o}n. Para ello hemos medido cinco rasgos foliares en un total de 28 especies del gener{\´o} Quercus de Espa{\~n}a y M{\´e}xico a lo largo de un gradiente de evapotranspiraci{\´o}n potencial. Nuestros resultados muestran dos dimensiones independientes de variaci{\´o}n funcional foliar: por un lado, las especies se distribuyen de acuerdo con el espectro de econom{\´i}a foliar a lo largo del gradiente de humedad ed{\´a}fica, encontr{\´a}ndose las especies m{\´a}s conservativas en el uso de recursos en regiones con mayor evapotranspiraci{\´o}n potencial y las especies m{\´a}s adquisitivas en zonas con menor evapotranspiraci{\´o}n. Por otro lado, el tama{\~n}o foliar esta principalmente condicionado por el origen geogr{\´a}fico de las especies. Estos resultados sugieren que las variaciones evolutivas dentro de un mismo linaje est{\´a}n asociadas a la variaci{\´o}n coordinada de sus rasgos, siendo la humedad un factor clave en la variaci{\´o}n funcional del g{\´e}nero Quercus. Adem{\´a}s, destacar que no se aprecia relaci{\´o}n entre la longevidad foliar y el espectro de econom{\´i}a foliar, lo cual podr{\´i}a deberse a que la historia evolutiva del h{\´a}bito foliar en los robles de ambos pa{\´i}ses ha sido diferente.}, language = {es} } @misc{ArenasNavarroOyamaGarciaOlivaetal., author = {Arenas-Navarro, Maribel and Oyama, Ken and Garc{\´i}a-Oliva, Felipe and Torres-Miranda, Andr{\´e}s and Garcia de la Riva, Enrique and Terrazas, Teresa}, title = {The role of wood anatomical traits in the coexistence of oak species along an environmental gradient}, series = {AoB PLANTS}, volume = {13}, journal = {AoB PLANTS}, number = {6}, issn = {2041-2851}, doi = {10.1093/aobpla/plab066}, pages = {14}, abstract = {Oaks (Quercus) are a dominant woody plant genus in the northern hemisphere, which occupy a wide range of habitats and are ecologically diverse. We analysed the wood anatomical traits, the variables derived and the relative hydraulic conductivity of 21 oak species to identify their performance according to abiotic factors, leaf phenological patterns and phylogenetic restrictions by analysing the interspecific variation along an environmental gradient. First, we determine the causes of anatomical trait variation in the oaks, analysing the functional trade-offs related to distribution along the environmental gradient. We measure the phenotypic plasticity of the anatomical traits to determine the role of environment and geographic distance in the range of phenotypic plasticity. Second, we examined if oaks co-occurred along the environmental gradient. Then we analysed if wood anatomical traits reflect differences among their phylogenetic section, leaf habit and a phylogenetic section/leaf habit category. Last, we tested the phylogenetic signal. Our results showed that vessel diameter, vessel frequency, wood density and relative hydraulic conductivity are the main axes of trait variation in the species analysed among leaf habit categories. The aridity index and seasonal precipitation drive the variation in the analysed traits. Higher environmental distance resulted in a higher relative distance plasticity index among traits. Co-occurrence of oak species with different leaf habits and phylogenetic trajectories may promote complementary resource acquisition. The phylogenetic signal in the oak species studied was low, which implies labile wood traits.}, language = {en} }