永定区龙潭桫椤群落特征及保护建议  

Characteristics and protection suggestions of Alsophila community in Longtan town of Yongding District

作　　者：廖阿庆 Liao A Qing(Forestry Planning Team,Yongding 364100,Fujian,China)

机构地区：[1]福建省龙岩市永定区林业规划队,福建永定364100

出　　处：《福建林业》2024年第5期25-27,共3页Fujian Forestry

摘　　要：以永定区龙潭桫椤群落为研究对象,采用样方调查方法对各层次植被特征进行调查,探讨该区域桫椤种群特征并提出保护建议。结果表明:桫椤群落共有植物29科38属40种,桫椤总体呈零星分布,小面积呈斑状(块状)分布;多样性结果表明物种丰富度和多样性指数排序为草本层>乔木层>灌木层;优势度指数(Simpson指数)排序为灌木层>乔木层>草本层;均匀度指数(Pielou指数)排序为草本层>乔木层=灌木层。调查区内50%桫椤分布在5~10 cm径级,中小径级居多,大径级少,年龄结构呈纺锤形,属衰退型种群。建议组织开展专项调查,进一步扩大调查范围及面积,更加全面地评估该地桫椤种群分布情况,使桫椤得到有效的保护。In order to understand the population characteristics of Alsophila community in Longtan town of Yongding District,a quadrat survey method was selected to investigate the vegetation characteristics at various levels of the community,and protection suggestions were proposed.The survey results showed that the Alsophila community consists of 40 species belonging to 38 genera in 29 families.The Alsophila is generally sporadically distributed,with small areas showing patchy(blocky)distribution.The diversity results indicate that the order of species richness and diversity index is herb layer>tree layer>shrub layer;The order of dominance index(Simpson index)is shrub layer>tree layer>herbaceous layer;The order of evenness index(Pielou index)is herb layer>tree layer=shrub layer.50%of the surveyed area's spinulose trees are distributed in the 5~10 cm diameter range,with a majority in the medium to small diameter range and fewer in the large diameter range.Their age structure is spindle shaped and they belong to a declining population.It is suggested to organize a special investigation to further expand the scope and area of the survey,and to comprehensively evaluate the distribution of the Alsophila population in the area,in order to obtain effective protection.

关 键 词：桫椤 群落 种群多样性 年龄结构 

分 类 号：Q948.1[生物学—植物学]