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Temporal variation and its drivers in the elemental traits of four boreal plant species

Journal of Plant Ecology 2021年第3期14卷 398-413页

作者： Isabella C.richmond Shawn J.Leroux travis r.heckford Eric Vander Wal Matteo rizzuto Juliana Balluffi-Fry Joanie L.Kennah Yolanda F.Wiersma Department of Biology Memorial University of Newfoundland232 Elizabeth AvenueSt.John'sNL A1B 3X9Canada

Aims Intraspecific variation in plant traits has important consequences for individual fitness and herbivore *** plants,trait variability across spatial dimensions is well ***,temporal dimensions of trait variability are less well known,and may be influenced by seasonal differences in growing degree days(GDD),temperature and ***,we aim to quantify intraspecific temporal variation in traits and the underlying drivers for four commonly occurring boreal plant *** We sampled the elemental and stoichiometric traits(%C,%N,%P,C:N,C:P,N:P)of four common browse species'foliage across 2 *** a two-step approach,we first fitted generalized linear models(GzLM,n=24)to the species'elemental and stoichiometric traits,and tested if they varied across *** we observed evidence for temporal variability,we fitted a second set of GzLMs(n=8)with temperature,productivity and moisture as explanatory *** Findings We found no evidence of temporal variation for most of the elemental and stoichiometric traits of our four boreal plants,with two *** was an important predictor for percent carbon across all four species(r^(2)=0.47-0.67)and for multiple elemental and stoichiometric traits in balsam fir(5/8,r2=0.29-0.67).Thus,variation in percent carbon was related to interannual differences,more so than nitrogen and phosphorus,which are limiting nutrients in the boreal *** results also indicate that year may explain more variation in conifers'stoichiometry than for deciduous plants due to life history *** was the most frequently occurring variable in the second round of models(8/8 times,r^(2)=0.21-0.41),suggesting that temperature is an important driver of temporal variation in these traits.

关键词： biogeochemistry boreal forest elemental phenotype ecological stoichiometry environmental drivers plant traits plant variation

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