摘要
【目的】分析海南尖峰岭热带山地雨林60 hm^(2)大样地幼苗物种组成、分布及数量特征变化规律,更深入了解热带森林群落物种组成和自然更新过程,为进一步探究幼苗分布与生长的影响因素提供参考依据。【方法】在海南尖峰岭典型热带山地雨林,基于2012年建立的1块60 hm^(2)动态监测大样地,连续7年监测其中290个样站(每个样站3个1 m^(2)小样方)的幼苗生长规律,区分幼苗的生活型、菌根类型和物种优势度,分析其物种组成及数量动态变化特征。【结果】2013—2019年共记录到幼苗个体234种60750株,包括4种生活型(乔木、灌木、藤本和草本)和3种菌根类型(丛枝菌根类型AM、外生菌根类型ECM、内生和外生混合类型AM&ECM)。优势物种九节和厚壳桂幼苗广泛分布,其重要值、植株数量和出现频度均在所有物种幼苗中占据前2位。各幼苗样方物种数量分布不均匀,较大部分幼苗物种仅有稀少的植株数量。【结论】海南尖峰岭热带山地雨林幼苗物种组成丰富,存在大量稀有物种,研究结果对了解时间和空间尺度上幼苗的物种组成、分布及数量特征变化以及探究其影响因素具有重要参考价值。
【Objective】This paper analyzed the species composition and quantitative characteristics of seedlings in a 60 hm^(2)plot in the tropical mountain rainforest in Jianfengling,Hainan Island,in order to further understand the community species composition and the forest natural regeneration process.【Method】This study was conducted in a typical tropical mountain rainforest in Jianfengling,Hainan.The seedling dynamics in 290 sample stations(each with three 1 m×1 m small quadrats)in a 60 hm^(2)plot was monitored for 7 consecutive years(from 2013 to 2019).All seedling species were classified into four life forms,and three mycorrhizal types and species dominance were distinguished respectively.Their species composition and quantitative dynamic changes were analyzed.【Result】In the seven years,a total of 60750 seedlings,belonging to 234 species,were recorded,including four life forms(tree,shrub,liana,and herb).There were three mycorrhizal types,including arbuscular mycorrhiza(AM).ecto-mycorrhiza(ECM),and AM&ECM mixed type.The dominant species,Psychotria asiatica and Cryptocarya chinensis,were widely distributed,occupying the top two positions in terms of importance values,abundance and frequency among all species seedlings.The distribution number of species in each seedling station was uneven.A large part of species only had sparse seedlings.【Conclusion】There are abundant species of seedlings in the tropical forests and most of them are rare.This study provides important references for understanding the dynamic changes of seedling species composition,distribution and quantity characteristics at the spatial and temporal scales,and exploring their influencing factors in the future.
作者
石佳竹
许涵
李艳朋
陈洁
骆土寿
林明献
李意德
Shi Jiazhu;Xu Han;Li Yanpeng;Chen Jie;Luo Tushou;Lin Mingxian;Li Yide(Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 510520;Experimental Station of Research Institute of Tropical Forestry,Chinese Academy of Forestry,Ledong 572542)
出处
《林业科学》
EI
CAS
CSCD
北大核心
2024年第9期33-40,共8页
Scientia Silvae Sinicae
基金
国家自然科学基金委区域创新发展联合基金项目(U22A20449)
科技基础资源调查专项(2019FY101607)。
关键词
海南尖峰岭
热带山地雨林
幼苗
物种组成
数量特征
Jianfengling,Hainan Island
tropical mountain rainforest
seedling
species composition
quantity characteristics
