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- W795951490 abstract "Alpine cushion plants are foundation species known for their nursingability. Moreover, studies have shown that morphological variation in foundationspecies can trigger variation in competitive effects on subordinate species, likely toaffect community composition. We investigated the consequences of intraspecificvariation within two alpine cushion species (Festuca gautieri and Onobrychis cornuta)across heterogeneous environments in two mountain ranges [the Pyrenees (France)and Mount-Lebanon (Lebanon), respectively] for the associated plant communities(subalpine and oromediterranean, respectively). We assessed with observationaland/or experimental (common-gardens, reciprocal transplantation experiments)approaches the relative contribution of genetics and plasticity to the morphologicalvariation between two cushion phenotypes (tight and loose) of the foundationspecies, and to their differential effects on subordinate species. Communityfeedbacks were also quantified. Our results show that both genetics and plasticitycontributed to the phenotypic variation. The genetic basis of the morphologicaldifferences between phenotypes induced heritable differences in competitive effectson subordinate species, but however counteracted the general increase incompetition with decreasing stress dominantly found in the literature on subalpinesystems. We also found negative feedbacks of subordinates on foundation speciesfitness, with higher cover of subordinate species reducing the cushions flowerproduction. Subordinate species diversity was higher in benign than in stressedenvironmental conditions. Consequently, we concluded that genetic effects overcomethe environmental effects by limiting competition in benign physical conditions, thusmaintaining a higher diversity in benign than stressed conditions." @default.
- W795951490 created "2016-06-24" @default.
- W795951490 creator A5081768129 @default.
- W795951490 date "2014-10-16" @default.
- W795951490 modified "2023-09-27" @default.
- W795951490 title "Roles of environmental plasticity and adaptation of nurse species from the subalpine and oromediterranean zones of the Pyrenees and the Mount-Lebanon for alpine communities structure" @default.
- W795951490 hasPublicationYear "2014" @default.
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