亚热带次生常绿阔叶林植物功能性状及多样性对人工抚育的响应  

Response of functional traits and functional diversity of woody plants to tending in a secondary subtropical evergreen broad-leaved forest

作　　者：刘子琪 姚良锦 焦洁洁[2] 陆超[2] 王志高 李婷婷[2] 袁位高[2] 江波[2] 吴初平[2] LIU Ziqi;YAO Liangjin;JIAO Jiejie;LU Chao;WANG Zhigao;LI Tingting;YUAN Weigao;JIANG Bo;WU Chuping(School of Forestry and Biotechnology,Zhejiang Agriculture and Forestry University,Hangzhou 311300,China;Zhejiang Forestry Academy,Hangzhou 310023,China)

机构地区：[1]浙江农林大学林业与生物技术学院,杭州311300 [2]浙江省林业科学研究院,杭州310023

出　　处：《生态学报》2024年第11期4733-4743,共11页Acta Ecologica Sinica

基　　金：浙江省“尖兵”“领雁”项目(2024C03227)。

摘　　要：亚热带次生常绿阔叶林普遍存在生长滞缓、固碳功能和经济价值低下等问题,迫切需要通过人工抚育提高其生态系统功能。对植物功能性状及其多样性的深入研究,能够找寻植物共存与群落稳定发展的内在机制,为提升森林生态系统功能的实践提供基础。为了探究人工抚育对亚热带次生常绿阔叶林质量提升的影响,以杭州午潮山国家森林公园内的次生常绿阔叶林为研究对象,实施了不同强度的抚育措施,通过群落植被复查,分析群落植物功能性状以及功能多样性对不同强度人工抚育的响应。结果发现:抚育2年后,群落最大潜在树高与叶片氮、磷、钾含量显著上升,而叶片干物质含量和叶片叶绿素含量均有显著下降,比叶面积有下降趋势,两种强度的抚育之间差异不显著;叶片干物质含量、叶绿素含量与叶片氮含量间的相关性由不显著变为了显著负相关,而叶片干物质含量与叶片叶绿素含量,叶片磷、钾含量与叶片氮含量,叶片磷含量与叶片钾含量间的相关性由不显著变为显著正相关;在20%强度抚育下,功能丰富度指数均值从对照的0.52显著下降为0.16,功能均匀度指数与功能分离度指数的均值则分别上升到0.61和0.67,显著高于对照组的0.51和0.56;在10%强度抚育下,功能丰富度有所下降,功能均匀度与功能分离度均有所上升,但差异不显著。研究表明,人工抚育在一定程度上改变了群落水平的植物功能性状与功能多样性,提高了群落植物利用资源的能力和效率;而适度的抚育强度更能解放资源空间,对群落产生的影响更加明显。该结果为亚热带次生常绿阔叶林的经营与管理提供依据与参考。Due to long-term human interference,the vast majority of subtropical evergreen broad-leaved forests in China have degenerated into the secondary forests,which are with shortcomings such as low production rate,low ability of storage carbon,and low economic value,etc.Making profound studies on plant functional traits and functional diversity can identify the underlying mechanisms of plant coexistence and stable community development,providing a foundation for enhancing the forest ecosystem functions in practice.In order to investigate the impact of tending measures on the community of subtropical secondary evergreen broad-leaved forests,different intensities of tending measures were implemented on the secondary forest sample plots in Wuchao Mountain in Hangzhou,and a review of community vegetation was conducted two years later to compare and analyze the differences in plant functional traits and functional diversity of woody plants after conducting different intensities of tending measures.The results showed that after tending,the maximum potential height and the leaf nitrogen content,the leaf phosphorus content,and the leaf potassium content significantly increased at the community level compared to the control group,while the leaf chlorophyll content,the twig density and the leaf dry matter content at the community level significantly decreased,and there was a decreasing trend in the specific leaf area.There was no significant difference between the two intensities of tending measures.The correlation between the leaf dry matter content,the leaf chlorophyll content,and the leaf nitrogen content changed from insignificant to significantly negative,while the correlation between the leaf dry matter content and the leaf chlorophyll content,the leaf phosphorus content,the leaf potassium content and the leaf nitrogen content,as well as the leaf phosphorus content and the leaf potassium content changed from insignificant to significantly positive.After 20%intensity tending,the mean functional richness significantly decre

关 键 词：人工抚育 植物功能性状 功能多样性 森林恢复 

分 类 号：S753.5[农业科学—森林经理学]