Differential responses of three coastal grassland species to seawater flooding

作     者：Mick E.Hanley Tom L.Gove Gregory R.Cawthray Timothy D.Colmer 

作者机构：School of Biological SciencesPlymouth UniversityDrake CircusPlymouth PL48AAEngland School of Plant BiologyThe University of Western Australia35 Stirling HighwayCrawley6009 WAAustralia 

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2期

页      面：322-330页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0707[理学-海洋科学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：Plymouth University International Research  Networking and Collaboration Grant (to M.E.H.) 

主　　题：climate change salinity sea-level rise soil waterlogging storm surge microcosm 

摘      要：Aims Supratidal plant communities fulfil a vital role in coastal protec-tion,but despite an increased likelihood of seawater flooding resulting from anthropogenic climate change,we understand little about how tidal inundation affects these habitats or interactions between their component *** aim was to determine how three common coastal grassland species responded to simulated seawater flooding and how subsequent changes to their ecophysi-ology,growth and survival might affect plant-plant interactions in mixed *** Seeds of three widely distributed European coastal grassland species(Leontodon autumnalis Asteraceae,Plantago lanceo-lata Plantaginaceae and Trifolium pratense Fabaceae)were collected from a coastal grassland site in South West *** Experiment 1,we quantified changes in leaf ion(K^(+),Na^(+),Cl^(−))concentrations as a response to short-duration(0,2,8 or 24 h)immersion in seawater of the root-zone before monitoring longer-term effects on plant survival and *** a second experiment,we examined community-level responses by subjecting mixed assemblages of all three species to seawater immersion for(0,12,24 or 96 h).Important Findings When grown individually,one species(Trifolium)had markedly reduced survival with increasing soil immersion time,but a con-sistent decline in plant growth for all species with flooding dura-tion was most likely linked to osmotic and ionic stresses caused by salt ion *** mixed assemblages,all species suffered increased mortality and reduced growth following seawater flood-ing,although the relative contribution of one species(Leontodon)to total biomass increased in flooded *** thus demon-strate a number of species-specific responses to simulated seawater flooding and show that when grown together,interactions between plants are altered as a *** argue that variation in the responses of component plant species will dictate how coastal plant communities respond to,and r