演替和地形共同影响浙江百山祖森林群落的性系统多样性  

Succession and topography jointly influence the diversity of plant sexual systemsin the Baishanzu forest community

作　　者：徐凯伦 陈小荣 张敏华 于婉婉 吴素美 朱志成 陈定云 兰荣光 董舒[1,2] 刘宇 Kailun Xu;Xiaorong Chen;Minhua Zhan;Wanwan Yu;Sumei Wu;Zhicheng Zhu;Dingyun Chen;Rongguang Lan;Shu Dong;Yu Luiu(ECNU-UAlberta Joint Lab for Biodiversity Study,School of Ecology and Environmental Sciences,East China Normal University,Shanghai 200241,China;Zhejiang Tiantong National Station for Forest Ecosystem Research,Ningbo,Zhejiang 315114,China;Qingyuan Conservation Center of Qianjiangyuan-Baishanzu National Park,Qingyuan,Zhejiang 323808,China)

机构地区：[1]华东师范大学-阿尔伯塔大学生物多样性联合实验室,华东师范大学生态与环境科学学院,上海200241 [2]浙江天童森林生态系统国家野外科学观测研究站,浙江宁波315114 [3]钱江源-百山祖国家公园庆元保护中心,浙江庆元323808

出　　处：《生物多样性》2024年第12期131-142,共12页Biodiversity Science

基　　金：钱江源-百山祖国家公园百山祖管理局科研项目基金(2022JBGS04,2023JBGS06)。

摘　　要：植物性系统多样性对森林群落构建和生态系统功能维持具有重要意义。本文以浙江百山祖亚热带森林25 ha动态监测样地中胸径(diameter at breast height,DBH)≥1 cm的木本植物为研究对象,描述了样地内木本植物性系统多样性的格局,并检验了地形、土壤理化性质和演替对群落性系统数量特征的影响。结果表明:(1)样地内163种木本种子植物中有两性花植物95种,雌雄异株植物43种,雌雄同株异花植物25种,两性花在科、属、种和个体水平上的数量都占据优势;雌雄同株异花植物的平均胸径显著大于两性花和雌雄异株植物。(2)在样方水平,两性花植物数量同样占据主要优势,其次为雌雄异株植物和雌雄同株异花植物;在样地内,较高海拔的北坡性系统多样性较低,而较低海拔的南坡性系统多样性较高。(3)地形对植物群落性系统数量特征的影响大于理化因子;演替阶段同样对性系统数量特征具有重要影响,在演替早期物种黄山松(Pinus taiwanensis)和杉木(Cunninghamialanceolata)比例较高的样方中雌雄异株植物出现的频率更高,并因此具有更高的性系统多样性。本研究结果表明:植物性系统在森林群落构建过程中发挥重要作用,且地形、演替和土壤理化性质会共同塑造森林群落性系统多样性格局。Aim:This study aims to investigate community patterns in the 25-ha dynamics plot of subtropical forest in Baishanzu,Zhejiang Province,and their relationship with environmental factors affecting woody plant sexual systems.The broader theoretical goal is to explore the impact of plant sexual system diversity on forest community assembly.Method:This study conducted a comprehensive survey of all woody plants with a stem diameter at breast height(DBH)≥1 cm in the 25-ha dynamics plot of the Baishanzu(BSZ)forest in Qingyuan County,Zhejiang Province.We analyzed the abundance of different plant sexual systems,the DBH of species within each sexual system,the importance of each sexual system within the community,and the diversity of sexual systems within the plot.Additionally,redundancy analysis(RDA)was employed to quantitatively examine the influence of topography,soil physicochemical properties,and succession on the characteristics of different plant sexual systems.Results:(1)Among the 163 species of woody plants in the 25-ha plot,95 were hermaphrodite,43 were dioecy,and 25 were monoecy.Hermaphrodite exhibited dominance in quantitative characteristics at the family,genus,species,and individual levels.The average DBH of monoecy was significantly greater than that of hermaphrodite and dioecy.(2)At the quadrat level,hermaphrodite remained dominant,followed by dioecy and monoecy.The north-facing slope at higher elevation exhibited lower sexual system diversity,while the south-facing slope at lower elevation exhibited higher sexual system diversity.(3)The impact of topography on plant sexual systems surpassed that of soil physicochemical properties.Additionally,the succession stage significantly influenced the quantitative characteristics of plant sexual systems,with early successional areas exhibiting higher occurrences of dioecy and consequently greater sexual system diversity.Conclusion:The sexual systems of plants play an important role in forest community assembly in the BSZ 25-ha plot.Topography,soil physicochemical pr

关 键 词：植物性系统 群落构建 演替 亚热带森林 动态监测样地 

分 类 号：S718.54[农业科学—林学]