生物多样性 ›› 2011, Vol. 19 ›› Issue (2): 190-196.doi: 10.3724/SP.J.1003.2011.07030

所属专题: 中国的森林生物多样性监测

• 研究报告 • 上一篇    下一篇

不同程度人为干扰对古田山森林群落谱系结构的影响

宋凯1, 2, 米湘成1*, 贾琪1, 3, 任海保1, Dan Bebber4, 马克平1   

  1. 1中国科学院植物所环境与植被变化国家重点实验室, 北京 100093
    2中国科学院研究生院, 北京 100049
    3浙江师范大学化学与生命科学学院, 浙江金华 321004
    4Earthwatch Institute, Mayfield House, 256 Banbury Road, Oxford, OX2 7DE, United Kingdom
  • 收稿日期:2011-02-22 修回日期:2011-03-04 出版日期:2011-03-21
  • 通讯作者: 米湘成 E-mail:mixiangcheng@ibcas.ac.cn
  • 基金项目:

    在受不同程度人为干扰的亚热带森林中评估和监测气候变化对碳库和碳通量的影响

Variation in phylogenetic structure of forest communities along a human disturbance gradient in Gutianshan forest, China

Kai Song1, 2, Xiangcheng Mi1*, Qi Jia1, 3, Haibao Ren1, Dan Bebber4, Keping Ma1   

  1. 1State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China

    2Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

    3College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, Zhejiang 321004, China

    4Earthwatch Institute, Mayfield House, 256 Banbury Road, Oxford, OX2 7DE, United Kingdom
  • Received:2011-02-22 Revised:2011-03-04 Online:2011-03-21
  • Contact: Xiangcheng Mi E-mail:mixiangcheng@ibcas.ac.cn
  • Supported by:

    Quantify and monitor carbon pools and fluxes to assess the impact of climate change on subtropical forests under different anthropogenic disturbances.

群落谱系结构包含群落发育的历史信息, 能从新的角度反映群落形成的生态过程。作者在浙江古田山自然保护区亚热带常绿阔叶林中选择了人为干扰强度不同的4种群落类型, 以20 m×20 m为研究尺度探讨了不同干扰程度对群落谱系结构的影响。结果表明, 人工林(类型I)谱系结构发散; 但间伐林(类型II)、自然恢复林(类型III)以及自然老龄林(类型IV)谱系结构聚集, 且以类型II和IV聚集度最高。进一步分析不同径级谱系结构发现, 在中小径级(DBH≤5 cm和5 cm10 cm时, 除了类型IV, 其他3种群落都是谱系结构发散, 这反映了在恢复早期种子扩散对这些林型群落构建影响较大; 而皆伐后的演替和间伐增加了群落生境异质性, 生境过滤作用增强, 使类型II、III群落中小径级谱系结构表现为聚集; 类型IV群落不同径级谱系结构均表现为聚集, 可能与其稳定的生境过滤作用有关。

Community phylogenetic structure contains information about evolutionary relationships among coexisting species in a community. Studies on community phylogenetic structure provide new insights into ecological processes and the mechanisms underlying community restoration. We compared the phylogenetic structure of forest communities along a human disturbance gradient using data from 12 1-ha plots in secondary forests within the Gutianshan National Nature Reserve, Zhejiang Province, China. We found that, at the 20 m×20 m scale, the plantation forest community (I) was phylogenetically overdispersed. Forest communities II (naturally-restored forest 50 years after clear cutting and 20 years after heavy selective cutting), III (naturally-restored forest 50 years after clear cutting), and IV (old-growth forest) were phylogenetically clustered. Forest types II and IV were the most clustered. We also conducted the same analyses for four forest types grouped into different DBH classes, and found that forests II, III, IV with DBH less than 5 cm and 5–10 cm were phylogenetically clustered, but forest I was overdispersed. In contrast, all the forests with DBH more than 10 cm were phylogenetically overdispersed except the forest IV. Our results suggest that seed dispersal is the main process resulting in phylogenetic overdispersion at early stage of succession, and habitat filtering is main process leading to phylogenetic clustering when habitat heterogeneity increases during succession. Possibly as a result of habitat filtering, forest IV was always phylogenetically clustered regardless of which size class was examined.

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