生物多样性 ›› 2006, Vol. 14 ›› Issue (1): 1-12.doi: 10.1360/biodiv.050154

• 论文 •    下一篇

四川盆地西缘湿性常绿阔叶林不同恢复阶段物种多样性响应

朱万泽1*, 蔡小虎2, 何飞2, 王金锡2   

  1. 1 (中国科学院成都山地灾害与环境研究所, 成都 610041)
    2 (四川省林业科学研究院, 成都 610081)
  • 收稿日期:2005-07-11 修回日期:2005-11-21 出版日期:2006-01-20
  • 通讯作者: 朱万泽

Response of species diversity to restoration succession: the case of the moist evergreen broad-leaved forests in the western edge of Sichuan Basin

Wanze Zhu1*, Xiaohu Cai2, Fei He2, Jinxi Wang2   

  1. 1 Institute of Mountain Harzard and Environment, Chinese Academy of Sciences, Chengdu 610041
    2 Sichuan Academy of Forestry, Chengdu 610081
  • Received:2005-07-11 Revised:2005-11-21 Online:2006-01-20
  • Contact: Wanze Zhu

采用空间代替时间的方法, 探讨了位于四川盆地西缘的崇州市鞍子河自然保护区和邛崃市天台山国家森林公园的湿性常绿阔叶林自然恢复演替过程中物种多样性的响应。结果表明: (1)在5–350年的植被恢复中, 群落物种丰富度表现出先增加后下降的趋势, 以恢复到100年时群落的物种数和Margalef指数最高, 分别为130种和21.49; 植被恢复的前50年乔木层物种增加较快; 50–100年期间灌木层和草本层物种增加较快。物种数和Margalef指数随着演替的进行均表现出抛物线函数变化趋势: y = y0+at+bt2+ct3。植被恢复演替过程中, 卵叶钓樟(Lindera limprichitii)和润楠(Machilus pingii)生态位较宽, 可作为该地区植被人工恢复造林的供选树种。(2)群落的Simpson指数以植被恢复30–50年期间较高, Shannon-Wiener指数以30–100年林龄阶段较高。植被恢复过程中乔木层物种多样性变异系数较大, 而灌木层相对较小且对植被恢复物种多样性的贡献较大。因此在天然次生林恢复中, 应加强对群落灌木层的保护。(3)植被恢复中, 物种均匀度指数呈波动性增加趋势, 以植被恢复后期群落均匀度较大, 350年林龄群落Pielou指数和McIntosh指数分别为2.0834和2.4177; (4)随着演替的进行, 各阶段群落之间Whittaker指数呈波动性增加, 而Sørenson 指数呈波动性减少趋势。四川盆地西缘湿性常绿阔叶林恢复是一个漫长的过程, 恢复到顶极群落至少需要300年以上的时间, 但该区域群落具有较强的恢复力, 显示自然恢复是该区域常绿阔叶林及其生物多样性恢复和重建的有效途径之一。

Based on investigation of moist evergreen broad-leaved forests in Anzihe Nature Reserve and Tiantai National Forest Park, located at the western edge of the Sichuan Basin, we studied the response of species diversity to different restoration phases using the technique of space-for-time substitution, the results were as follows: (1) During 350 years of restoration succession, we found a unimodal response of species diversity over time. Species richness and the Margalef index peaked 100 years after the onset of restoration succession, up to 130 and 21.49, respectively. There was a fast increase in arbor species within the first 50 years, and then in shrubs and herbs within 50–100 years phase. The species number and the Margalef index (y) varied according to a parabolic function with time (t): y = y0+at+bt2+ct3. We recommend Lindera limprichitii and Machilus pingii as ideal tree species for afforestation in the study area because of their wide niche; (2) There were greater value of Simpson index during 30–50 years after restoration and value of Shannon-Wiener index during 30–100 years respectively. The variance coefficient of species diversity in the arbor layer was greater than that in the shrub layer. The shrub layer contributed greatly to species diversity of the whole community, therefore it should be given more concern in the restoration of secondary forests; (3)Species evenness index displayed a fluctuating increase with the restoration process. Pielou index reaching 2.0834 and the McIntosh index 2.4177 after 350 years of restoration; (4) The Whittaker index displayed a fluctuating increase through the whole restoration process, whereas the Sørenson index decreased. Although the restoration of the moist evergreen broad-leaved forest is a long-term process and it will take at least 300 years to recover to its climax community, there is strong resilience, implying that natural recovery is a very effective and efficient way to restore degraded moist evergreen broad-leaved forest and its biodiversity in the study area.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed