东拉山短丝木犀植物群落土壤养分对其群落空间分布的影响  

Effect of Soil Nutrients on Spatial Distribution of Osmanthus serrulatus Community in Dongla Mountains

作　　者：杨国栋[1,2] 钱慧蓉 陈林 王贤荣[1,2] YANG Guodong;QIAN Huirong;CHEN Lin;WANG Xianrong(Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China;College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China)

机构地区：[1]南京林业大学南方现代林业协同创新中心,南京210037 [2]南京林业大学生物与环境学院,南京210037

出　　处：《西北植物学报》2018年第2期343-352,共10页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金(31300558);江苏省自然科学基金(BK20130972)

摘　　要：采用地统计学与GIS相结合的方法,研究了四川省宝兴县东拉山短丝木犀植物群落土壤养分的空间分布特征,以阐明短丝木犀植物群落的分布与土壤养分的策应关系,为保护与恢复衰退的短丝木犀种群提供科学依据。结果表明:(1)东拉山地区属于典型的石灰岩山地,山体较为活跃,土壤保水力、持肥力较低,仅有短丝木犀等少数耐瘠薄的物种才能够完成生活史。(2)东拉山短丝木犀植物群落的分布与群落土壤中有机物、氮、磷和钾的含量显著相关,其中全N、P和K营养元素决定了短丝木犀群落的更新繁衍方式。(3)土壤作为整个短丝木犀生态系统的一部分在生态系统中达到物质能量的平衡,使得短丝木犀群落在地理隔离间形成适用自身群落生长的小生态系统的"孤岛"。Geostatistics method in combination with GIS was employed in this research to study the spatial distribution characteristics of soil nutrients for Osmanthus serrulatus community and to figure out the coordinated relation between O.serrulatus community and soil nutrients with Dongla Mountain in Baoxing County of Sichuan Province as the study area,aiming at protecting the O.serrulatus population which is declining due to habitat fragmentation.The results show that:(1)only a small number of species with barren tolerance such as O.serrulatus can finish the life circle in the active limestone mountain region of Dongla Mountain,which is characterized by low maintaining capacity of soil moisture and fertilizer.(2)The distribution of O.serrulatus community in Dongla Mountain is significantly correlated with the content of organic matter,nitrogen,phosphorus and potassium in community soil and the nitrogen,phosphorus and potassium determine the reproductive pattern of O.serrulatus community.(3)As part of the whole O.serrulatus ecosystem,soil achieves the balance of matter and energy in the ecosystem,leading to the formation of“isolated island”of small ecosystem by O.serrulatus among the geographical isolation suitable for their growth.

关 键 词：GIS空间分析 群落 短丝木犀 土壤养分 

分 类 号：Q948.113[生物学—植物学]