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福建省东门屿优势木本植物的生态位与种间联结 被引量:16

Niche and interspecific associations of dominant woody plants in Dongmen Island,Fujian Province
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摘要 为探讨福建省东门屿优势木本植物种间关系及群落演替动态,在样方调查的基础上,用生态位测定、方差比率法、χ^(2)检验等方法,结合联结系数、Jaccard指数、Ochiai指数和Dice指数研究东门屿优势木本植物的生态位与种间联结特征,分析植物入侵对群落种间关系的影响。结果表明:在16种优势木本植物中,生态位宽度较高的依次为马缨丹(5.75)、木麻黄(4.60)、银合欢(3.84)、潺槁木姜子(3.55)和台湾相思(3.43),这5种植物为群落主要优势种;马缨丹、木麻黄、潺槁木姜子等生态位宽度较高的物种伴随着较高的生态位重叠指数。由于入侵植物马缨丹的影响,车桑子-了哥王等部分生态位宽度较低的种对也表现出较高的生态位重叠指数;生态位重叠指数和生态位相似性系数小于0.10的种对分别有79、74对,占总数的65.83%、61.67%。东门屿优势木本植物种间总体联结性表现为不显著正联结,表明东门屿的植物群落尚处于演替中期的动态发育阶段;滨柃、秤星树、了哥王均为群落中的优势灌木,三者之间表现出较强的正联结。回归分析结果显示,种间联结度与生态位重叠指数呈极显著正相关(P<0.001)。东门屿植物群落部分种间生态位重叠和种间联结度较高,但多数种对联结性不强,物种分布有一定的独立性;马缨丹的入侵加剧了部分物种间的竞争,不利于群落生态系统稳定性和物种多样性。 The interspecific relationships and community succession dynamics of dominant woody plants in Dongmen Island,Fujian Province,were analyzed by investigating the impacts of plant invasions on the relationship between species in the community.The parameters analyzed included the niche measurement,variance ratio,χ^(2) test,association coefficient,Jaccard index,Ochiai index,and Dice index,among others.The aim was to identify the niche and interspecific association characteristics of dominant plant species in Dongmen Island based on sample surveys.Among the 16 dominant species,the species with the highest niche breadth index were Lantana camara(5.75),Casuarina equisetifolia(4.60),Leucaena leucocephala(3.84),Litsea glutinosa(3.55),and Acacia confusa(3.43).Species pairs with large niche widths were L.camara,C.equisetifolia,and L.glutinosa.These species pairs were accompanied by a high niche overlap index,but the ecological habits and the influence of the invasive plant,L.camara,caused some species with lower niche widths(such as Dodonaea viscosa,Wikstroemia indica)to also show a higher niche overlap index.There were 74 species pairs with niche similarities and 79 species pairs with niche overlaps less than 0.10,accounting for 61.67%and 65.83%in all respectively.The dominant species had an insignificant positive association,indicating that the plant community of Dongmen Island may be in the dynamic development stage in middle succession.Eurya emarginata,Ilex asprella,and W.indica are the dominant shrubs in the community,with strong positive connections with each other.A regression analysis suggested an extremely substantial positive correlation between the interspecific association and niche overlap index.Therefore,some interspecific niche overlaps and interspecific associations in the plant community of Dongmen Island are relatively high.Conversely,the overall interspecific association is weak,and the species distribution has a certain degree of independence.The invasion of L.camara intensified the competition among som
作者 张盟 郑俊鸣 万佳艺 任可 荣俊冬 郑郁善 ZHANG Meng;ZHENG Junming;WAN Jiayi;REN Ke;RONG Jundong;ZHENG Yushan(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;College of Landscape Architecture,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350108,China)
出处 《森林与环境学报》 CSCD 北大核心 2022年第1期11-19,共9页 Journal of Forest and Environment
基金 福建省区域发展项目(2015N3015) 福建省科技创新团队项目(闽教科2018[49]) 福建农林大学科技创新发展基金项目(CXZX2017118)。
关键词 福建省 海岛 东门屿 优势木本植物 生态位 种间联结 植物入侵 Fujian Province island Dongmen Island dominant woody plants niche interspecific association invasive plant
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