摘要
舟山群岛因面积变化、地理隔离和人类高强度干扰而蕴育着丰富的植被和海岛特有植物群落。基于洛迦山岛30个植被样地划分其植被类型,分析特有植物群落的物种和功能多样性。结果表明,1)洛迦山岛植被可划分为常绿阔叶林、常绿落叶阔叶混交林、常绿灌丛和灌草丛;按优势种和植物区系特征划分出10种群丛或群落类型;按群落年龄和外貌划分出10种演替阶段的群落类型。2)红楠-普陀樟群落和滨柃-海桐灌丛的胸径级结构均呈“L”形分布,胸径在0~5 cm的个体占比最高。3)红楠-普陀樟群落的平均密度显著低于滨柃-海桐灌丛(P<0.05),其他物种多样性在2种群落间无显著差异(P>0.05);仅红楠-普陀樟群落的功能离散度和Rao二次熵指数显著大于滨柃-海桐灌丛(P<0.05)。综合发现洛迦山岛植被类型丰富,海岛特有植物群落结构完整、物种和功能多样性高。研究结果有助于深入理解陆桥型海岛植物群落的构建机制和提升海岛特有植物群落的保护。
Zhoushan Islands often gestate abundant vegetation types and island endemic plant communities due to their changed areas,geographical isolation,and high human disturbance.Based 30 typical plant plots in Luojiashan Island,we classified vegetation types,and analyzed the species and functional diversity of its endemic plant community.The results showed that 1)the vegetation types of Luojiashan Island included evergreen broad-leaved forest,mixed evergreen and deciduous broad-leaved forest,evergreen shrub and shrub grassland.According to the dominant species and floristic characteristics,10 types of associations or communities were classified.Based on the community age and physiognomy,communities with 10 types of successions were divided.2)The structures of DBH-class of Cinnamomum japonicum-Machilus thunbergii communities and Eurya emarginata-Pittosporum tobira shrubs were in"L"type distribution,in which the proportion of individuals with DBH between 0-5 cm was the highest.3)The average densities of C.japonicum-M.thunbergii communities were significantly lower than that of E.emarginata-P.tobira shrubs(P<0.05),for other biodiversity indexes,no significant differences were found between the two mentioned above(P>0.05),except that the functional dispersion and Rao's entropy index of the former were significantly bigger than the later(P<0.05).The comprehensive conclusion is that Luojiashan Island is rich in vegetation types,complete community structure,higher species and functional diversity of island endemic communities,and it is a model of vegetation restoration in Zhoushan Islands.This study is helpful to understand the maintenance mechanism and endemic plant communities'protection in land-bridge islands.
作者
许洺山
李玉芬
郑忠
胡志忠
田文斌
赵慈良
胡军飞
刘海
欧丹燕
孙元敏
阎恩荣
XU Ming-shan;LI Yu-fen;ZHENG Zhong;HU Zhi-zhong;TIAN Wen-bin;ZHAO Ci-liang;HU Jun-fei;LIU Hai;OU Dan-yan;SUN Yuan-min;YAN En-rong(Fujian Provincial Key Laboratory of Marine Ecological Conservation and Restoration,Xiamen 361005,Fujian,China;Putuo Forest Ecosystem Research and Observation Station,School of Ecological and Environmental Sciences,East China Normal University,Shanghai 200241,China;Zhoushan Agricultural Education and Training Center,Zhoushan 316004,Zhejiang,China;Public Utility Management Center of Putuo Mountain in Zhoushan Islands New District,Zhoushan,Zhejiang 315114,China;Third Institute of Oceanography,MNR,Xiamen 361005,Fujian,China)
出处
《西北林学院学报》
CSCD
北大核心
2023年第6期74-80,共7页
Journal of Northwest Forestry University
基金
国家自然科学基金重点项目(32030068)
福建省海洋生态保护与修复重点实验室2020年度开放基金(EPR2020007)。
关键词
功能多样性
海岛特有植物群落
物种多样性
胸径级结构
植被分类
functional diversity
island endemic plant community
species diversity
class structure of diameter at breast height
vegetation classification
