湖南八面山银杉的生境群落特征与物种多样性  

Habitat community characteristics and species diversity of Cathaya argyrophylla in Bamianshan of Hunan Province

作　　者：黄志宏 陈晓霞 何德操 李雯 裴男才[2] 杨骏[3] 罗佳[3] HUANG Zhihong;CHEN Xiaoxia;HE Decao;LI Wen;PEI Nancai;YANG Jun;LUO Jia(Administration Bureau of Bamianshan National Nature Reserve of Hunan Province,Guidong 423501,Hunan,China;Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 510520,Guangdong,China;Hunan Academy of Forestry,Changsha 410004,Hunan,China)

机构地区：[1]湖南八面山国家级自然保护区管理局,湖南桂东423501 [2]中国林业科学研究院热带林业研究所,广东广州510520 [3]湖南省林业科学院,湖南长沙410004

出　　处：《湖南林业科技》2025年第1期45-52,共8页Hunan Forestry Science & Technology

摘　　要：银杉是我国特有的孑遗植物,其野生个体不足5000株。为探究银杉群落的生境、组成和结构,本研究对湖南省八面山国家级自然保护区的银杉群落进行了调查和分析。结果表明:银杉群落主要分布于高海拔、岩石裸露的山脊或陡崖绝壁;群落物种组成丰富,共记录到维管植物50种,隶属于32科43属;群落分层明显、结构完整,乔木层、灌木层和草本层的优势种分别为银杉、少花柏拉木和光里白;主要伴生树种的径级结构出现不同程度的断层,群落的稳定性差;灌木层的物种多样性最高,乔木层次之,草本层最低。研究结果揭示了银杉群落的生境特征、物种组成、结构特征和物种多样性现状,为银杉的保护和管理提供了科学依据。这些研究结果还有助于了解极小种群植物的生存机制,为制定有效的保护策略提供了重要参考。Cathaya argyrophylla is a relict plant unique to China,with less than 5000 wild individuals.To explore the habitat,composition and structure of C.argyrophylla community,this study investigated and analyzed the C.argyrophylla communities in Bamianshan National Nature Reserve of Hunan Province.The results showed that the C.argyrophylla communities were mainly distributed on high-altitude,rock-exposed ridges or cliffs.The species composition of the communities was rich,with a total of 50 species of vascular plants recorded,belonging to 43 genera and 32 families.The community exhibited distinct layering and a complete structure,with the dominant species in the tree layer,shrub layer and herb layer being C.argyrophylla,Blastus pauciflorus and Diplopterygium laevissimum,respectively.The diameter structure of the main accompanying tree species showed various degrees of gaps,indicating poor community stability.Species diversity was highest in the shrub layer,followed by the tree layer,and lowest in the herb layer.These results revealed the habitat characteristics,species composition,structural features and current species diversity of C.argyrophylla community,provided scientific basis for its protection and management,and also helped to understand the survival mechanism of plants with extremely small populations and provide an important reference for the development of effective protection.

关 键 词：银杉 生境 物种组成 群落结构 物种多样性 群落稳定性 八面山 

分 类 号：S718.542[农业科学—林学]