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云南东部山区不同类型次生林群落谱系结构特征

丁洪波,吴兆录**,吕东蓬,武秋君,单梦颖,白皓天,罗康   

  1. (云南大学生态学与地植物学研究所, 昆明 650091)
  • 出版日期:2015-10-10 发布日期:2015-10-10

Community phylogenetic structural characteristics of various secondary forests in mountainous eastern Yunnan.

DING Hong-bo, WU Zhao-lu**, LU Dong-peng, WU Qiu-jun, SHAN Meng-ying, BAI Hao-tian, LUO Kang   

  1. (Institute of Ecology and Geobotany, Yunnan University, Kunming 650091, China)
  • Online:2015-10-10 Published:2015-10-10

摘要: 以云南东部山区4种群落39个样方调查的205个物种数据为基础,分析群落谱系结构,以推断植被恢复过程中的群落构建机制。结果表明:(1)不同恢复方式所形成的华山松林、水冬瓜林以及次生常绿阔叶林均呈现谱系聚集格局,表现出生境过滤作用的主导性;(2)在处于森林恢复初期的火棘灌丛中,草本植物在大尺度上呈现随机格局,可能是生境过滤与竞争排斥双重作用的结果;(3)群落过去的状态或经历(如农耕、砍伐等)所形成的影响可能一直存在,从而使得恢复的群落谱系结构在生境过滤作用下更加趋向于聚集;(4)不同生活型植物的谱系结构具有差异,反映出植物群落构建的主导因素会因植物生活型不同而具有差异。

关键词: 土壤酶活性, 土壤有机碳, 秸秆管理, 土壤质量, 种植模式

Abstract: Phylogenetic structure has been used to explore the mechanisms of community composition, but little attention has been paid to the phylogenetic structure of plant communities undergoing strong human disturbance. Based on data from 205 species in four kinds of community in 39 quadrats on mountains of eastern Yunnan, we analyzed the community phylogenetic structure to discover the community assembly mechanism during forest restoration. The results indicated that: (1) Pinus armandii forest, Alnus ferdinandicoburgii forest and secondary evergreen broadleaved forest developed under different restoration ways were all phylogenetically clustered, suggesting the dominance of habitat filtering. (2) Herbaceous plants growing in Pyracantha fortuneana shrubs at early stage of recovery were phylogenetically random at large scale, which might be the result of habitat filtering and competitive exclusion. (3) The legacy effects of previous stages or interference (such as farming, logging) might remain, which made the new community phylogenetic structure more clustered under the effects of habitat filtering. (4) Plant community phylogenetic structures of differing lifeforms were different, indicating that the dominant factors affecting plant community assembly varied according to lifeform.

Key words: straw management, cropping system, soil quality, soil enzyme activity, soil organic carbon