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Emergent interactions influence functional traits and success of dune building ecosystem engineers

Journal of Plant Ecology 2018年第4期11卷 524-532页

作者： Joseph K.Brown Julie C.Zinnert Donald R.Young Department of Biology Virginia Commonwealth University1000 West Cary Street RichmondVA 23284USA

Aims Dune building processes are affected by interactions between the growth of ecosystem engineering dune grasses and environmen-tal factors associated with disturbance such as sand burial and sea *** investigating how species interactions influence dune community structure and functional trait responses in high abiotic stress environments is *** investigated how spe-cies interactions influence the functional trait responses of three dominant dune grasses to common abiotic *** We performed a multi-factorial greenhouse experiment by plant-ing three common dune grasses(Ammophila breviligulata Fern.,Uniola paniculata *** Spartina patens Muhl.)in different interspecific combinations,using sand burial and sea spray as abiotic *** burial was applied once at the beginning of the *** spray was applied three times per week using a calibrated spray *** functional trait meas-urements(leaf elongation,maximum root length,aboveground biomass and belowground biomass)were collected at the end of the *** experiment continued from May 2015 to August *** Findings Species interactions between *** and *** negatively affected dune building function traits of ***,indicating that interactions with *** could alter dune community ***,*** had a negative interaction with ***,which decreased *** functional trait responses to abiotic *** all species occurred together,the interactions among species brought about coexistence of all three *** data suggest that species interactions can change traditional functional trait responses of dominant species to abiotic stress.

关键词： competition coastal dunes facilitation intransitivity

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