金钟山亚热带森林林窗特征与木本植物多样性的关系  

Relationship between forest gap characteristics and woody species diversity in a subtropical forest in Jinzhong Mountain

作　　者：杨元征 蒙洲菊 苏宏新 王嘉丽 蔡文华 杨健 俎佳星 YANG Yuanzheng;MENG Zhouju;SU Hongxin;WANG Jiali;CAI Wenhua;YANG Jian;ZU Jiaxing(Key Laboratory of Environment Change and Resources Use in Beibu Gulf,Ministry of Education,Nanning Normal University,Nanning 530001,China;Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation,Nanning Normal University,Nanning 530001,China;School of Geography Science and Planning,Nanning Normal University,Nanning 530001,China)

机构地区：[1]南宁师范大学北部湾环境演变与资源利用教育部重点实验室,南宁530001 [2]南宁师范大学广西地表过程与智能模拟重点实验室,南宁530001 [3]南宁师范大学地理科学与规划学院,南宁530001

出　　处：《生态学杂志》2024年第3期675-681,共7页Chinese Journal of Ecology

基　　金：广西科技基地和人才专项(桂科AD19110143,桂科AD21220088);国家自然科学基金项目(42001216);广西壮族自治区第五批八桂学者专项经费资助。

摘　　要：开展林窗空间格局与林下木本植物多样性关系的研究,对于认识森林物种共存、生物多样性维持以及生态系统可持续发展具有重要意义。本研究以广西金钟山自然保护区24 hm^(2)永久森林动态监测样地为对象,采用机载激光雷达获取样地点云数据,通过R语言提取林窗并计算各林窗的形状复杂指数,利用相关分析量化林窗特征与林下木本植物多样性的关系。结果表明:该研究区林窗空隙率为6.16%,密度为15.5个·hm^(-2),平均面积为39.72 m^(2),整体以微小和中型林窗为主;林窗空间分布格局存在地形分异特征,多分布于低海拔和缓坡区域;林窗形状复杂指数与香农指数、物种丰富度指数均呈正相关,且在低海拔和陡坡处表现更加明显。本研究揭示了亚热带森林林窗植被更新特征,对区域生物多样性保护具有一定指导作用。Studies on the relationship between forest gap spatial pattern and understory woody species diversity are of great significance for understanding species coexistence,biodiversity maintenance and sustainable development of forest ecosystems.In this study,we used the airborne Lidar to collect cloud data from a 24hm^(2) permanent forest dynamic monitoring plot in Jinzhong Mountain Nature Reserve of Guangxi,extracted forest gaps,and calculated shape complexity index of each forest gap by R programming language.Correlation analysis was conducted to quantify the relationship between forest gap characteristics and understory woody species diversity.The results showed that the forest gap rate in the study area was 6.16%,the gap density was 15.5·hm^(-2),the average gap area was 39.72 m^(2),and the gaps were mainly small and middle sized.The spatial distribution pattern of forest gaps had topographic differentiation,mostly distributed in low altitude and gentle slope areas.The gap shape complexity index was positively correlated with Shannon index and species richness index,which was more obvious in low altitude and steep slope areas.This study revealed the characteristics of plant regeneration in the forest gaps of subtropical forests,which has a certain guiding role for regional biodiversity conservation.

关 键 词：激光雷达 亚热带森林 林窗 分布格局 生物多样性 

分 类 号：S718.5[农业科学—林学]