文献类型：期刊文献

英文题名：Salt tolerance and stress level affect plant biomass-density relationships and neighbor effects

作者：Yu, Zhenxing[1] Chen, Wenwen[1] Zhang, Qian[1,2] Yang, Haishui[1] Tang, Jianjun[1] Weiner, Jacob[3] Chen, Xin[1]

第一作者：Yu, Zhenxing

通信作者：Chen, X[1]

机构：[1]Zhejiang Univ, Coll Life Sci, Hangzhou 310058, Zhejiang, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[3]Univ Copenhagen, Dept Plant & Environm Sci, DK-1958 Frederiksberg, Denmark

年份：2014

卷号：58

起止页码：1-4

外文期刊名：ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY

收录：;Scopus(收录号：2-s2.0-84899817928);WOS:【SCI-EXPANDED(收录号:WOS:000337871400001)】；

基金：We thank two anonymous reviewers and Associate Editor Jorge Gutierrez for helpful comments on the manuscript. This work was supported by the National Natural Science Foundation of China, China (NSFC grants 31070389 and 30870405).

语种：英文

外文关键词：Plant-plant interactions; Biomass-density relationships; Plant species; Salt marsh

摘要：It has been shown that plant biomass-density relationships are altered under extreme or stressed conditions. We do not know whether variation in biomass-density relationships is a direct result of stress tolerance or occurs via changes in plant-plant interactions. Here, we evaluated biomass-density relationships and neighbor effects in six plant species that differ in salt tolerance in a salt marsh, and conducted a literature review of biomass-density relationship under higher and lower stress levels. Our field study showed that both neighbor effects and the exponent of the biomass-density relationship (alpha) varied among plant species with different degrees of salt tolerance. There was a positive relationship between neighbor effects (measured as relative interaction index) and alpha-value among the tested species. The literature review showed that alpha and its variation increased under higher stress. Our results indicate that plant species with different salinity tolerance differ in the direction and strength of neighbor effects, resulting in variation in biomass-density relationships. Our results support the hypothesis that differences in biomass-density relationships among species are not due to differences in stress tolerance alone, they are mediated by changes in plant-plant interactions. (C) 2014 Elsevier Masson SAS. All rights reserved.