comCompetition for resources is ameliorated by niche differentiation between Solidago virgaurea life-history stages in the Arctic
作者机构：Department of Biological and Environmental ScienceUniversity of JyvaskylaPO Box 35FI-40014 JyvaskylaFinland
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6期
页 面：907-917页
学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学]
基 金：Ella and Georg Ehrnrooth Foundation The Finnish Cultural Foundation Academy of Finland(127657)
主 题：competition low Arctic niche resource use stable isotope natural abundance
摘 要：Aims competition has been shown to modify the niche breadth of coex-isting species,but within-species interactions have received little *** small juvenile individuals and established,larger,sexually reproducing adult individuals represent two life-his-tory stages within *** investigated the nitrogen and carbon resource use of adult and juvenile individuals and similarity of sym-biotic fungal community composition in these two plant life *** used the plant Solidago virgaurea growing in a simplified system in the low Arctic as model *** Isotopic signatures(foliarδ15N and foliarδ13c)were analysed to characterize nitrogen acquisition and water-use efficiency of the *** root fungal community composition was esti-mated by cloning and sequencing small subunit ribosomal RNA *** Findings The isotopic signatures differed significantly between the life stages,indicating that the establishing juvenile cohort used relatively more amino acids or gained N through mycorrhizal symbiosis in com-parison to the established adult *** fungal commu-nities did not differ between the two plant cohorts suggesting a possibility that the plants shared the same mycorrhizal *** conclude that competition-mediated differences in plant resource use may create niche differentiation between the two life-history stages and enable them to coexist.
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