生态学报2017，Vol.37Issue(10)：3515-3524,10.DOI:10.5846/stxb201602250328
三江平原湿地小叶章群落沿土壤水分梯度物种组成及多样性变化
Variations in plant species composition and diversity of Calamagrostis angustifolia community along soil water level gradient in the Sanjiang Plain
摘要
Abstract
Water is an important factor that affects the plant diversity of wetland ecosystems.It is also the main driving factor for wetland plant diversity and plant growth.The study of species diversity along the water environmental gradient in the context of global change is very important.The Sanjiang Plain is China's largest concentrated freshwater wetland distribution area and one of the key areas of China's five major freshwaters and wetlands.It is an important habitat for many rare and endangered animals,a breeding ground,and a migration route to many species.However,natural wetland areas are one of the fastest changing environments due to human activities worldwide.The area of Sanjiang Plain wetland has decreased,the groundwater level reduced,and the composition of plants significantly changed due to agricultural development-oriented human activities.We studied the species composition and diversity of three typical habitats,defined as typical meadow,wet meadow,and marsh,dominated by Calamagrostis angustifolia along the soil moisture gradient in Sanjiang Plain Wetlands.The results indicated that C.angustifolia was the dominant species in the three habitats,whereas the composition of associated species was significantly differentiated between the habitats.The typical indicator species of the meadow were Lathyrus quinquenervius and Carex orthostachys.The indicator species of the wet meadow were Carex pseudoconica and C.miyabei var.maopengensis.Non-metric multidimensional scaling analysis showed that the species composition was greater in meadow,and species composition was smaller in swamps and marsh meadow compared to other types of examined habitats.With soil moisture content increasing,the advantages of Calamagrostis angustifolia decreased and species richness and Simpson dominance showed a decreasing trend,while the Shannon-Wiener diversity and Pielou's evenness showed a gradual upward trend.The community similarity coefficient (C J,Cs) showed a gradual increasing trend,with the maximum values in marsh meadows and marshes,and the minimum values in typical meadow and marsh meadow.The change in Cody index pattern showed a gradual trend-the total number of species in communities was gradually reduced and the species turnover rate decreased.Studies suggest that plant species composition,Pielou's evenness index,Simpson's dominance index,and Shannon-Wiener diversity index of Calamagrostis angustifolia wetlands in Sanjiang Plain are closely related to changes in water dynamics.β diversity is closely related to the pattern of water gradient,whereas the change in species richness is not correlated with water gradient.This may be associated with the biological characteristics of species and other environmental factors,and warrants further studies.关键词
群落组成/α多样性/β多样性/指示种分析/非度量多维尺度分析/沼泽Key words
Community composition/α diversity/β diversity/indicator species analysis/non-metric multidimensional scaling analysis (NMDS)/marsh引用本文复制引用
王继丰,钟海秀,隋心,倪红伟,韩大勇,王建波,付晓玲,朱道光,刘赢男,曹宏杰,黄庆阳,谢立红..三江平原湿地小叶章群落沿土壤水分梯度物种组成及多样性变化[J].生态学报,2017,37(10):3515-3524,10.基金项目
国家自然科学基金(31500410,31170462,31370426,31400429) （31500410,31170462,31370426,31400429）
黑龙江省院所基本应用技术研究专项(STJB16-03,ZR201307) （STJB16-03,ZR201307）
黑龙江省科研机构创新能力提升专项计划(YC2014D007) （YC2014D007）
