文献类型：期刊文献

英文题名：Does salt stress affect the interspecific interaction between regionally dominant Suaeda salsa and Scirpus planiculumis?

作者：Zhou, Jian[1,2,3] Cui, Lijuan[1,2,3] Pan, Xu[1,2,3] Li, Wei[1,2,3] Zhang, Manyin[1,2] Kang, Xiaoming[1,2]

第一作者：Zhou, Jian

通信作者：Cui, LJ[1];Cui, LJ[2];Cui, LJ[3]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing, Peoples R China;[2]Beijing Key Lab Wetland Ecol Funct & Restorat, Beijing, Peoples R China;[3]Beijing Hanshiqiao Natl Wetland Ecosyst Res Stn, Beijing, Peoples R China

年份：2017

卷号：12

期号：5

外文期刊名：PLOS ONE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000402063000006)】；

基金：This work was funded by the Forestry Nonprofit Industry Scientific Research Special Project "The research of ecosystem service and evaluation techniques of coastal wetlands, China" (No.201404305). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

语种：英文

摘要：Plant-plant interactions that change along environmental gradients can be affected by different combinations of environmental characteristics, such as the species and planting density ratios. Suaeda salsa and Scirpus planiculumis are regionally dominant species in the Shuangtai estuarine wetland. Compared with non-clonal S. salsa, clonal S. planiculumis has competitive advantages because of its morphological plasticity. However, salt-tolerant S. salsa may grow faster than S. planiculumis in saline-alkali estuary soil. Whether the interactions between these two species along salinity gradients are affected by the level of salt stress and mixed planting density ratio remains unclear. Thus, to test the effects of salt stress and planting density ratios on the interactions between S. planiculumis and S. salsa in the late growing season, we conducted a greenhouse experiment consisting of 3 salinity levels (0, 8 and 15ppt) and 5 planting density ratios. Our results showed that the promotion of S. salsa growth and inhibition of S. planiculumis growth at low salinity levels (8 ppt) did not alter the interactions between the two species. Facilitation of S. salsa occurred at high salinity levels, and the magnitude of this net outcome decreased with increases in the proportion of S. salsa. These results suggest that competition and facilitation processes not only depend on the combinations of different life-history characteristics of species but also on the planting density ratio. These findings may contribute to the understanding of the responses of estuarine wetland plant-plant interactions to human modifications of estuarine salinity.