摘要
为探索广东省深圳市坝光湿地园银叶树群落优势种生态位特征,为该区域银叶树群落的保护措施提供科学依据,为银叶树林的经营与管理提供理论支持,在野外布设样方对群落乔木层和灌木层进行调查,采用生态位宽度和生态位重叠指标2种指标对优势种生态位特征进行讨论。结果表明:生态位宽度的排序与重要值有很大差别,乔木层和灌木层中均是银叶树重要值最大,分别为26.91和23.11,生态位宽度却排名第9和第5。乔木层中的阴香(Cinnamomum burmannii)、假苹婆(Sterculia lanceolata)和海杧果(Cerbera manghas)的生态位宽度较大,Levins指数和Shannon指数分别为14.07和2.69、13.50和2.68以及13.48和2.69,齿缘吊钟花(Enkianthus serrulatus)和木麻黄(Casuarina equisetifolia)的生态位宽度较小,Levins指数和Shannon指数分别为4.13和1.60以及3.38和1.39;灌木层中阴香、九节(Psychotria rubra)和假苹婆的生态位宽度较大,金叶树(Chrysophyllum lanceolatum)、香港大沙叶(Pavetta hongkongensis)和黄槿(Hibiscus tiliaceus)的生态位宽度较小。整体上各种群的生态位重叠值较低,一半以上种对的重叠值低于0.5;说明群落整体稳定,优势种竞争并不激烈。大部分生态位宽度比较大的种对相互之间生态位重叠值也较大,但是这种关系并不绝对。相比重要值,物种在样方的分布频度与生态位宽度关系更加密切。
To explore the niche characteristics of the dominant species of the Heritiera littoralis community in Baguang Wetland Park,Shenzhen City,Guangdong Province,to provide a scientific basis for the protection measures of the Heritiera littoralis community in this area,and to provide theoretical support for the management of the Heritiera littoralis forest,this study arranged samples in the field to investigate the tree layer and shrub layer of the community and adopted 2 indicators of niche breadth and niche overlap to discuss the niche characteristics of the dominant species.The results showed that the order of niche breadth was very different from the important value.The important values of Heritiera littoralis in the tree layer and shrub layer were the largest,26.91 and 23.11,respectively,but the niche breadth was ranked 9th and 5th.In the tree layer,the niche breadth of Cinnamomum burmannii,Sterculia lanceolata and Cerbera manghas was larger,and the Levins index and Shannon index were 14.07 and 2.69,13.50 and 2.68,and 13.48 and 2.69,respectively.However,those of Enkianthus serrulatus and Casuarina equisetifolia were smaller,4.13 and 1.60,and 3.38 and 1.39,respectively.In the shrub layer,the niche breadth of Cinnamomum burmannii,Psychotria rubra and Sterculia lanceolata was larger,and that of Chrysophyllum lanceolatum,Pavetta hongkongensis and Hibiscus tiliaceus was smaller.Overall,the niche overlap of each group was low,and the overlap value of more than half of the species pairs was lower than 0.5,which indicated that the community was stable as a whole and that the competition of dominant species was not fierce.Most species pairs with a larger niche breadth also have larger niche overlap values,but this relationship was not absolute.Compared with the important value,the distribution frequency of species in the quadrat was more closely related to the niche breadth.
作者
李一凡
刘梦芸
甘先华
黄芳芳
张卫强
LI Yifan;LIU Mengyun;GAN Xianhua;HUANG Fangfang;ZHANG Weiqiang(Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou 510520,China)
出处
《生态环境学报》
CSCD
北大核心
2020年第11期2171-2178,共8页
Ecology and Environmental Sciences
基金
广东省林业科技创新平台建设项目(2019KJCX021)
广东省林业科技创新平台项目(2020-KYXM-09)。
关键词
湿地
银叶树群落
生态位宽度
生态位重叠
wetland
Heritiera littoralis community
niche breadth
niche overlap
