极小种群野生植物圆叶玉兰的生态位研究  

Ecological Niche of Extremely Small Population of Wild Oyama sinensis

作　　者：曾洪[1] 陈小红[1] ZENG Hong CHEN Xiao-hong(College of Forestry, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China)

机构地区：[1]四川农业大学林学院,四川温江611130

出　　处：《四川农业大学学报》2017年第2期220-226,共7页Journal of Sichuan Agricultural University

基　　金：国家林业局第二次全国重点野生植物资源调查项目(003Z0304)

摘　　要：【目的】研究极小种群圆叶玉兰(Oyama sinensis)的生态位特征,以期为圆叶玉兰野生资源的保护和种群扩大提供理论依据。【方法】在大川镇圆叶玉兰分布区域的7个海拔梯度布设21个20 m×20 m的样地,进行群落调查,研究群落中主要种群的生态位宽度和生态位重叠。【结果】研究区内圆叶玉兰在各海拔分布均匀;贴毛箭竹(Fargesia adpressa)、圆叶玉兰、领春木(Euptelea pleiospermum)、川莓(Rubus setchuenensis)、蜡瓣花(Corylopsis sinensis)有较大的生态位宽度,分别为1.907、1.870、1.778、1.746、1.697,在群落中具有种群优势;圆叶玉兰和领春木、贴毛箭竹、红花悬钩子(Rubus inopertus)等主要的伴生树种之间的生态位重叠较高,生态位重叠值均在0.5~1之间。【结论】目前,圆叶玉兰生存状况良好,生态适应能力较强,在群落中具有重要的生态地位和作用。【Objective】The objective of the study was to explore ecological niche of extremely small population of wild O. sinensis and to provide a theoretical reference for wild resources protection and expansion of O. sinensis population.【Method】In the distribution area(Dachuan Town),21 plots(20 m×20 m)were set up in 7 elevations to investigate O. sinensis community composition. Ecologocial niche breadth and overlap of main tree. species were analyzed.【Results】O. sinensis was evenly distributed at each altitude in the area. The niche breadth was relatively large for some species,including Fargesia adpressa(1.907),Oyama sinensis(1.870),Euptelea pleiospermum(1.778),Rubus setchuenensis(1.746) and Corylopsis sinensis(1.697),suggesting that these species had population advantage in the community. The niche overlap values were relatively high between O. sinensis and main associated tree species(e.g.,Euptelea pleiospermum,Fargesia adpressa,Rubus inopertus),with an range of 0.5-1.【Conclusion】Currently,the survival situation of O. sinensis was well. O. sinensis played an important role in the communities due to strong ecological adaptability.

关 键 词：圆叶玉兰 重要值 生态位宽度 生态位重叠 

分 类 号：Q948.1[生物学—植物学] S685.15[农业科学—观赏园艺]