Resource-sharing strategies in ecotypes of the invasive clonal plant Carpobrotus edulis: specialization for abundance or scarcity of resources

作     者：Josefina G.Campoy Rubén Retuerto Sergio R.Roiloa 

作者机构：Departamento de Biología Celular y EcologíaÁrea de EcologíaFacultad de BiologíaCampus VidaUniversidade de Santiago de Compostela15782 Santiago de CompostelaSpain Grupo BioCostDepartamento de Biología AnimalBiología Vegetal y EcologíaÁrea de EcologíaFacultad de CienciasUniversidade da Coruña15071 A CoruñaSpain 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2017年第10卷第4期

页      面：681-691页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 08[工学] 081101[工学-控制理论与控制工程] 0811[工学-控制科学与工程] 071102[理学-系统分析与集成] 081103[工学-系统工程] 

基　　金：Financial support for this study was provided by the Spanish Ministry of Economy and Competitiveness and the European Regional Development’s Fund(ERDF)(grants Ref.CGL2013-44519-R awarded to S.R.R.and Ref.CGL2013-48885-C2-2-R awarded to R.R.) This is a contribution from the Alien Species Network(Ref.R2014/036-Xunta de Galicia,Autonomous Government of Galicia) 

主　　题：adaptive plasticity biomass allocation Carpobrotus edulis chlorophyll fluorescence clonal integration 

摘      要：Aims Carpobrotus edulis(L.)*** known to invade many coastal ecosystems around the world,and it has been considered as one of the most severe threats to numerous terrestrial plant ***,the study of the relationships between life-history traits that may favour its invasiveness and the invasibility of the environments is necessary to improve our knowledge about inva-sion *** this research,we specifically tested the effects of physiological integration in genotypes from contrasting habitats,where the importance of integration is expected to ***,the main objective of this work was to detect the presence of adaptive plasticity in the capacity for clonal integration in this aggressive *** In a greenhouse experiment,we compared the performance,in terms of growth and photochemical efficiency,of two *** *** and severed ramet pairs from coastal sand dunes and rocky coast habitats were grown in substrates of different quality and *** Findings Our study clearly indicates that clonal integration improves growth and photosynthetic efficiency in the aggressive invader *** differ-ent aspects of clonal integration determine site-specific strategies in this species in order to optimize its successful propagation in a particular *** demonstrated that the adaptation of *** to local envi-ronments has led to a differential selection of two complex clonal traits associated with the capacity for clonal *** patchy sand dunes,*** has evolved ecotypes with ramets highly plastic in patterns of biomass allocation,which allows ramets to specialize in the acquisi-tion of the resource that is locally most abundant,i.e.,a spatial division of labour among ***,in the harsher rocky coast habitats,local adaptation produced highly integrated ecotypes,where resource sharing is not combined with a specialization of resource acquisition.