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Plant responses to simulated warming and drought:a comparative study of functional plasticity between congeneric mid and high elevation species

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Journal of Plant Ecology 2018年第3期11卷 364-374页

作者： elena hamann Halil Kesselring Jürg Stöcklin Botanical Institute Department of Environmental SciencesSection Plant EcologyUniversity of BaselSchönbeinstrasse 64056 BaselSwitzerland

Aims Effects of climate change,especially changes in temperatures and precipitation patterns,are particularly pronounced in alpine *** response,plants may exhibit phenotypic plasticity in key functional traits allowing short-term adjustment to novel ***,little is known about the degree of pheno-typic plasticity of high elevation species relative to mid elevation *** We transplanted 14 herbaceous perennial species from high eleva-tion into two common gardens(1050 and 2000 m.a.s.l.)in the Swiss Alps,and we examined plastic responses in key functional traits to changes in temperature and soil water *** design was replicated with 14 congeneric species from mid elevation to assess if the degree of phenotypic plasticity differs between mid and high elevation *** was assessed across two growing seasons,while aboveground biomass and specific leaf area(SLA)were measured after the first growing season,and biomass alloca-tion to belowground and reproductive structures after the ***,a phenotypic plasticity index was calculated for the func-tional traits to compare the degree of plasticity between mid and high elevation *** Findings Aboveground biomass was higher in mid elevation species relative to high elevation congeners in all treatments,yet decreased for both with elevation and ***,SLA decreased with elevation and *** mass fraction(RMF)was generally higher in high ele-vation species,and decreased with drought at the lower *** increased the allocation to reproductive structures,especially when plants were grown at their elevation of ***,no differ-ence was found in the degree of phenotypic plasticity averaged across mid and high elevation species for any of the studied functional *** results indicate that phenotypic plasticity in the focal traits did not depend on the elevation of origin of the *** was not related to

关键词： biomass allocation common garden climate change perennial herbaceous species phenotypic plasticity SLA Swiss Alps transplant experiment

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