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Effects of traits,species identity and local environmental conditions on the assessment of interactions:insights from an alpine meadow community

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Journal of Plant Ecology 2009年第3期2卷 135-141页

作者： Chengjin Chu Youshi Wang Qi Li Luqiang Zhao Zhengwei Ren Sa Xiao Jianli Yuan Gang Wang MOE Key Laboratory of Arid and Grassland Ecology Lanzhou UniversityLanzhou 730000China MOE Key Laboratory of Western China’s Environmental System Lanzhou UniversityLanzhou 730000China

Aims The prediction that facilitation is the dominant interaction in physically stressful conditions has been supported by many but not all field *** the present paper,we tested the effects of the identity of species,the local environmental conditions and the currencies of performance measurement on such *** Using contrasting two plots,six species,and up to five multiple traits,we comprehensively explored the effects of the above factors on the assessment of plant interactions in an alpine meadow of the QingHai Tibetan ***,we attempted to figure out the possible mechanisms underlying the responses *** data were analysed by both standard ANOVAs and multivariate *** findings Our results demonstrated that the response to the removal of neighbours was both species and trait specific,and the effect of the ocal environmental conditions was dependent on the species *** contrast between plots had crucial influence on the net interactions of Kobresia macrantha,but little effect on Elymus *** the abiotic conditions,neighbours had significant impact on soil temperature,moist and solar *** results contribute to advance our knowledge on the potential underlying factors influencing the assessment of facilitation.

关键词： positive interactions species specific trait specific neighbour removal multivariate statistics PERMANOVA

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