广西茅尾海海域优势红树种群结构和动态变化特征  

Structure and dynamic variation characteristics of dominant mangrove populations in Maowei Sea area of Guangxi

作　　者：宁秋云 赖廷和 何斌源 黄中坚 朱婷 张桂顺 龙云宇 马日宇 NING Qiuyun;LAI Tinghe;HE Binyuan;HUANG Zhongjian;ZHU Ting;ZHANG Guishun;LONG Yunyu;MA Riyu(Guangxi Academy of Oceanography Guangxi Marine Testing Center,Ministry of Natural Resources,Nanning 530022,China;Guangxi Academy of Oceanography Guangxi Marine Disaster Emergency Center,Nanning 530022,China)

机构地区：[1]广西壮族自治区海洋研究院自然资源部广西海洋检测中心,广西南宁530022 [2]广西壮族自治区海洋研究院、广西壮族自治区海洋灾害应急中心,广西南宁530022

出　　处：《植物资源与环境学报》2024年第5期90-97,共8页Journal of Plant Resources and Environment

基　　金：国家自然科学基金项目(42366009);防城港核电厂红树林生态项目(4600021727);广西重点研发计划项目(2022AB20070)。

摘　　要：为了解广西茅尾海海域红树林群落现状,对茅尾海海域红树种群存活状况进行实地调查,并对优势桐花树〔Aegiceras corniculatum(Linn.)Blanco〕和秋茄树(Kandelia obovata Sheue,H.Y.Liu et J.W.H.Yong)种群的结构和动态变化特征进行了分析。结果表明:广西茅尾海海域15个样方内共有红树植物10240株,其中,桐花树和秋茄树分别占红树植物个体总数的96.2%和3.1%。桐花树种群和秋茄树种群幼苗资源丰富(个体数量分别占各自种群个体总数的82.8%和61.6%),更新状态较为理想,整个种群结构较为稳定。2种红树种群的种群动态指数(V_(pi))和随机干扰动态指数(V_(pi)′)均大于0,对外界环境较为敏感。2种红树种群存活曲线均为Deevey-Ⅱ型。2种红树种群的积累死亡率函数值总体随着径级的增大而增大,死亡密度函数值和危险率函数值总体随着径级的增大呈波动降低趋势。在经过未来2、4、6、8个径级时间后,2种红树种群幼苗能够不同程度地补充较大径级的个体,均属于增长型种群。综上所述,现阶段红树种群能很好地适应茅尾海海域环境,桐花树种群稳定性高于秋茄树种群,前者抵抗自然风险的能力高于后者,应持续加强红树林生态系统的保护与修复工作。To understand the current status of mangrove forest community in Maowei Sea area of Guangxi,a field survey was conducted on the survival status of mangrove populations in Maowei Sea area,and the structures and dynamic variation characteristics of the dominant populations of Aegiceras corniculatum(Linn.)Blanco and Kandelia obovata Sheue,H.Y.Liu et J.W.H.Yong were analyzed.The results show that there are a total of 10240 mangrove individuals in 15 plots in Maowei Sea area of Guangxi,in which,A.corniculatum and K.obovata account for 96.2%and 3.1%of the total number of mangrove plants,respectively.The A.corniculatum population and K.obovata population are rich in seedling resources(individual numbers account for 82.8%and 61.6%of the total number of individuals in respective populations,respectively),the regeneration status is relatively ideal,and the overall population structure is relatively stable.The population dynamic index(V_(pi))and random disturbance dynamic index(V_(pi)′)of both mangrove populations are greater than zero,indicating that they are relatively sensitive to external environment.The survival curves of both mangrove populations belong to the Deevey-Ⅱtype.The values of cumulative mortality rate function of both mangrove populations increases with the increase of diameter class in general,while the values of death density function and hazard rate function show a fluctuating decrease tendency with the increase of diameter class in general.After the next two,four,six,and eight diameter class time,seedlings of both mangrove populations will be able to replenish individuals of larger diameter classes to different degrees,and both populations belong to the growth type.In conclusion,the mangrove populations are well adapted to the environment of Maowei Sea area at present,the A.corniculatum population is more stable than the K.obovata population,the former has a higher ability to resist natural risks than the latter,and the protection and restoration work of the mangrove forest ecosystem should be conti

关 键 词：红树种群 静态生命表 种群动态 时间序列 茅尾海 

分 类 号：Q948.15[生物学—植物学] S718.54[农业科学—林学]