comLocal adaptation to distinct elevational cores contributes to current elevational divergence of two Aquilegia vulgaris subspecies  

作　　者：Jesús M.Bastida Pedro J.Rey Julio M.Alcántara 

机构地区：[1]Departamento de Biología Animal,Biología Vegetal y Ecología,Universidad de Jaén,Jaén E-23071,Spain

出　　处：《Journal of Plant Ecology》2015年第3期273-283,共11页植物生态学报（英文版）

基　　金：Ministerio de Educación y Ciencia(BOS2003-03979-C02-02 and CGL2006-02848);Formación de Personal Investigador grant(BES-2004-3387 to J.M.B.).

摘　　要：Aims Phenotypic plasticity and local adaptation of populations at their distributional limits are crucial to understand species colonization and persistence in novel or marginal environments,as well as spe-cies divergence and niche width evolution.We assess the contri-bution of these processes to shape current elevational limits and determine elevational phenotypic divergence between two subspe-cies of Aquilegia vulgaris(subsp.vulgaris and nevadensis).Methods We conducted sowing and transplant experiments considering four elevations throughout the current elevational range of A.vulgaris in southern Iberian Peninsula.Experiments were designed to explore,on the one hand,local adaptation through three components of performance(germination,survival and growth)and,on the other hand,the phenotypic differentiation and/or plasticity associated to local adaptation.Four populations per subspecies(three from the elevational core and one from the elevational boundary)were used as seed sources.Patterns of local adaptation and phenotypic differentiation are examined in the context of the‘centre-periphery’hypothesis.Important Findings Central populations of both subspecies performed better at their local elevations while marginal populations were maladapted,confirming the hypothesis and contributing to explain the current elevational segregation of these subspecies.Density of glandular pubescence and germination timing seem to be related to local adaptation,through phenotypic differentiation between subspe-cies or elevations.The widespread subsp.vulgaris showed signals of adaptive plasticity in the timing of germination while it was not the case in the endemic subsp.nevadensis.

关 键 词：Iberian Aquilegia local adaptation phenotypic plasticity centre-periphery hypothesis elevational divergence germination timing 

分 类 号：TG1[金属学及工艺—金属学]