滇东菌子山喀斯特森林群落乔木优势树种生态位和种间联结  

Niche and interspecific association of dominant tree species in karst forest of Junzi Mountain,Eastern Yun⁃nan,China

作　　者：刘雨婷 侯满福[1,2] 贺露炎 唐伟 赵俊 LIU Yuting;HOU Manfu;HE Luyan;TANG Wei;ZHAO Jun(Ministry of Education Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection,Guangxi Normal Universi-ty/Guangxi Key Laboratory of Sustainable Utilization of Landscape Resources in Lijiang River Basin,Guilin 541004,Guangxi,China;College of Environment and Resources,Guangxi Normal University,Guilin 541004,Guangxi,China;Forestry and Grassland Bureau of Shizong County,Shizong 655700,Yunnan,China)

机构地区：[1]广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室/漓江流域景观资源可持续利用广西重点实验室,广西桂林541004 [2]广西师范大学环境与资源学院,广西桂林541004 [3]师宗县林业和草原局,云南师宗655700

出　　处：《应用生态学报》2023年第7期1771-1778,共8页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(31960233);国家科技基础性工作专项(2015FY210200)资助。

摘　　要：为揭示滇东菌子山喀斯特森林树种的种间关系,基于样方调查数据,运用生态位测定、χ^(2)检验、联结系数(AC)、Spearman秩相关检验等方法研究了乔木优势树种生态位和种间联结性。结果表明:滇青冈生态位宽度最大,胡桃楸生态位宽度最小;生态位宽度与频度的排序比与重要值的排序更一致。乔木优势树种生态位重叠程度总体较低,平均值为0.21,物种对环境资源利用相似性较低。乔木优势树种的总体联结性为显著正联结,正负联结比为1.07,群落总体上处于相对稳定的演替后期。乔木优势树种的χ^(2)检验、Spearman秩相关检验结果显示,65.3%的种对间呈不显著联结,种间联结性较弱。物种间联结系数(AC)、Spearman秩相关系数与相应生态位重叠指数间均呈极显著正相关。滇青冈⁃多脉猫乳、球核荚蒾⁃大叶臭花椒、小花香槐⁃山羊角树、大叶臭花椒⁃小花香槐等种对联结性强、生态位宽,在滇东及邻近喀斯特生态恢复中有较好的潜在应用价值。To understand the interspecific relationships of tree species in the karst forest of Junzi Mountain in Eastern Yunnan,we evaluated the niche and interspecific association of dominant tree species based on field survey plot data with the combining approaches of niche determination,χ^(2)test,association coefficient(AC),and Spearman rank correlation test.The results showed that the niche breadth of Quercus glaucoides was the largest and that of Juglans mandshurica was the smallest.The ranking of niche breadth was more consistent with the ranking of frequency than with that of importance values.The degree of niche overlap was generally low,with a mean value of 0.21,suggesting a low similarity in resource utilization among tree species.The overall association of dominant tree species was significantly positive,and the ratio of positive and negative association was 1.07,indicating that the communities were at a relatively stable and the late succession stage.Theχ^(2)test and Spearman rank correlation test for tree dominant species showed that 65.3%species pairs were not significantly associated with each other,indicating a weak interspecific association.Both association coefficient(AC)and Spearman rank correlation coeffi⁃cient showed significantly positive correlations with the corresponding niche overlap index.The species pairs of Q.glaucoides-Rhamnella martini,Viburnum propinquum-Zanthoxylum myriacanthum,Cladrastis delavayi-Carrierea calycina,Z.myriacanthum-C.delavayi had strong interspecific associations and wide ecological niches,thus may have potential application value in ecological restoration of karst region in eastern Yunnan and the vicinity areas.

关 键 词：种间联结 生态位 种对 喀斯特森林 

分 类 号：S718.54[农业科学—林学]