摘要
为探究粤北石漠化地区不同石漠化程度森林优势树种及其生态位特征,文章以粤北潜在、轻度、中度、重度石漠化代表性森林群落样地为研究对象,从物种重要值、生态位宽度、生态位重叠和相似指数4个方面分析其优势树种生态位特征。结果表明,不同石漠化程度森林群落的优势树种不同,综合物种重要值和生态位宽度可知,马尾松Pinus massoniana、麻栎Quercus acutissima和秀丽锥Castanopsis jucunda在各石漠化程度中有良好表现,可作为石漠化地区树种选择的参考;生态位重叠指数和相似性指数平均值的排序由大到小依次为中度石漠化(0.795和0.707)、潜在石漠化(0.594和0.535)、重度石漠化(0.566和0.472)、轻度石漠化(0.344和0.349),中度石漠化区域的物种竞争最激烈,潜在石漠化和重度石漠化区域次之,轻度石漠化区域最低,其中鸡仔木Sinoadina racemosa-秀丽锥、檵木Loropetalum chinense-马尾松和鸡仔木-麻栎的物种对间存在较高的种间竞争,在进行植被恢复时需避免这些种对搭配。
To explore the ecological niche characteristics of dominant tree species in forests with different degrees of rocky desertification in northern Guangdong,this paper focused on four representative forest community samples from potential,mild,moderate,and severe rocky desertification areas in northern Guangdong.It analyzed the ecological niche characteristics of their dominant tree species from four aspects:species importance value,niche width,niche overlap,and similarity index.The results showed that the dominant tree species in different degrees of rocky desertification forests.Considering both species importance value and niche width,Pinus massoniana,Quercus acutissima,and Castanopsis jucunda exhibit good performances across all degrees of desertification,and can be used as a reference for tree species selection in desertification areas.The average values of niche overlap index and similarity index are in descending order:moderate desertification area(0.795 and 0.707),potential desertification area(0.594 and 0.535),severe desertification area(0.566 and 0.472),light desertification area(0.344 and 0.349).Species competition is most intense in the moderate desertification area,followed by the potential desertification and severe desertification areas,and the lowest in the light desertification area.Among them,there is relatively high interspecific competition among the species pairs of Sinoadina racemosa and C.jucunda,Loropetalum chinense and P.massoniana,S.racemosa and Q.acutissima.These species pairs should be avoided when restoring vegetation.
作者
张华英
郭昊
曹窈畅
冯汉华
王旭
罗勇
白拉曲珍
ZHANG Huaying;GUO Hao;CAO Yaochang;FENG Hanhua;WANG Xu;LUO Yong;BAILA Quzhen(Guangdong Forestry Survey and Planning Institute,Guangzhou,Guangdong 510520,China;College of Tropical Agriculture and Forestry,Hainan University,Haikou,Hainan 570228,China;Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou,Guangdong 510520,China;College of Forestry,Central South University of Forestry and Technology,Changsha,Hunan 410004,China;Beijiangyuan Forestry Ecosystem National Observation and Research Station,Nanling Mts,Guangzhou,Guangdong 510520,China)
出处
《林业与环境科学》
2025年第1期50-58,共9页
Forestry and Environmental Science
基金
广东省林业科技创新项目(2018CXPT004)
广东省生态公益林效益补偿资金省统筹经费。
关键词
石漠化
生态位特征
优势树种
生态位重叠
生态位相似
rocky desertification
niche characteristics
dominant tree species
niche overlap
niche similarity
