异质生境水位差异对小叶章有性繁殖分配的影响  

Effects of water levels in heterogeneous habitats on sexual reproductive allocation of Deyeuxia angustifolia

作　　者：董海鹏 曹宏杰[1] 谢立红[1] 黄庆阳[1] 杨立宾[1] 倪红伟 王继丰[1] DONG Hai-peng;CAO Hong-jie;XIE Li-hong;HUANG Qing-yang;YANG Li-bin;NI Hong-wei;WANG Ji-feng(Institute of Nature Resources and Ecology,Heilongjiang Academy of Sciences,Harbin 150040,China;Heilongjiang Academy of Forestry,Harbin 150081,China)

机构地区：[1]黑龙江省科学院自然与生态研究所,哈尔滨150040 [2]黑龙江省林业科学院,哈尔滨150081

出　　处：《应用生态学报》2022年第2期378-384,共7页Chinese Journal of Applied Ecology

基　　金：国家重点研发计划重点专项(2016YFC0500405-02);黑龙江省应用技术研究与开发计划项目(GA19C006-6);中央引导地方科技发展专项(ZY20B15);黑龙江省科学院双提雁阵特别计划项目(YZ202003)资助。

摘　　要：以三江平原湿地代表植物小叶章为对象,通过对杂类草草甸、典型草甸、沼泽化草甸、沼泽生境中小叶章个体大小与生物量差异及繁殖构件与植株生物量之间相关关系的分析,研究不同生境中水位对小叶章个体生物量与繁殖分配的影响。结果表明:小叶章个体大小、高度及有性繁殖特征随水位升高而显著降低;杂类草草甸、典型草甸、沼泽化草甸和沼泽中小叶章的繁殖阈值分别为0.245、0.149、0.148和0.157 g;除沼泽化草甸外,其他3种生境中小叶章植株个体大小与繁殖分配均呈显著负相关;相较于个体大小,土壤含水量对于小叶章有性繁殖分配影响更大,不同生境中小叶章对个体大小和繁殖分配的差异投资是其具有良好生态适应性的基础条件。Taking Deyeuxia angustifolia as the research object,a representative plant of wetland in Sanjiang Plain,we analyzed the variations of individual size and biomass among the habitats of swamp wetlands,swampy meadows,typical meadows and miscellaneous grass meadows,and the relationship between reproductive components and plant biomass.We explored the effects of water level on individual biomass and reproductive allocation of D.angustifolia in different types of wetlands.The results showed that plant biomass,height and the characteristics of sexual reproduction significantly decreased with the increases of water level.The reproductive thresholds of D.angustifolia in miscellaneous grass meadow,typical meadow,swampy meadow,and swamp wetland were 0.245,0.149,0.148 and 0.157 g,respectively.There was a significantly negative correlation between plant size and reproductive allocation in three habitats except swampy meadow.Compared with individual size,soil water content had a stronger effect on reproductive allocation of D.angustifolia.The different investment between individual size and reproductive allocation in different habitats was the basic condition that contributes to the good ecological adaptability of D.angustifolia.

关 键 词：三江平原湿地 水位 小叶章 有性繁殖分配 

分 类 号：Q945[生物学—植物学]