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中国沙漠 ›› 2016, Vol. 36 ›› Issue (1): 20-26.DOI: 10.7522/j.issn.1000-694X.2014.00115

• “沙漠化土地恢复与持续利用国际研讨会”暨中国科学院奈曼沙漠化研究站30周年站庆会议论文选 • 上一篇    下一篇

科尔沁沙地植物功能性状的尺度变异及关联

周欣1,2, 左小安1, 赵学勇1, 刘川2, 吕朋1,2   

  1. 1. 中国科学院寒区旱区环境与工程研究所 奈曼沙漠化研究站, 甘肃 兰州 730000;
    2. 中国科学院大学, 北京 100049
  • 收稿日期:2014-06-10 修回日期:2014-09-30 出版日期:2016-01-20 发布日期:2016-01-20
  • 作者简介:周欣(1991-),女,安徽淮北人,硕士研究生,主要从事植物生态方面的研究。E-mail:candicezhouxin@gmail.com
  • 基金资助:
    国家自然科学基金项目(41171414);中国科学院"百人计划"项目(Y451H31001);中国科学院知识创新工程重要方向项目(KZCX2-EW-QN313);中国科学院青-创新促进会项目(1100000036)

Scale Variation and Correlation of Plant Functional Traits in the Horqin Sandy Land, China

Zhou Xin1,2, Zuo Xiaoan1, Zhao Xueyong1, Liu Chuan2, Lv Peng1,2   

  1. 1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-06-10 Revised:2014-09-30 Online:2016-01-20 Published:2016-01-20

摘要: 调查了科尔沁沙地流动沙丘、半固定沙丘和固定沙丘18个样地的物种组成,测定了28种植物的叶面积(LA)、比叶面积(SLA)和叶干物质含量(LDMC)等3个植物功能性状,并用性状梯度分析法对3个功能性状在群落水平上的变化进行了分解,研究了沙丘固定过程中的植物功能性状的尺度变异及其与生境变化的关系。结果表明:(1)随着沙丘的固定,群落平均LA逐渐增大,群落平均SLALDMC在半固定沙丘上最小;(2)群落平均SLA的生态位宽度随着沙丘固定程度依次减小,流动、半固定沙丘植物群落的适应能力较固定沙丘更强;(3)沙丘固定过程中物种性状值的变化与群落内共生植物种性状间变异的关联相比于群落间性状的变异更密切。沙丘固定导致了物种LALDMC较强的正相关关系,两性状在群落间的依赖性比群落内的强。物种在群落内和群落间采取不同的策略来适应沙丘固定过程生境的变化。

关键词: 性状梯度分析法, 群落平均性状值, 科尔沁沙地, 叶面积, 比叶面积, 叶干物质含量

Abstract: This paper investigated species composition of 18 plots in mobile dune, semi-fixed dune and fixed dune, measured 3 kinds of plant functional traits-leaf area (LA), specific leaf area (SLA) and leaf dry matter content (LDMC) from 28 plant species. Then we analyzed the variations of 3 functional traits on the community level, decomposed the species' trait values by adopting the trait-gradient approach (TGA) and studied the correlations between plant functional traits and variations of habitats along the gradient of sand dune fixation. The results show that: (1) community mean leaf area tend to increase with the fixation of sand dune; community mean SLA and LDMC reach the minimum values on the semi-fixed dune. (2) The community niche breadth, calculated by community mean SLA, decreases along the sand dune stabilization gradient, which illustrates that mobile dune and semi-fixed dune plant communities have wider distribution than fixed dune's; (3) The variations of trait values of species are more relative to co-occurring species than the change of mean trait values of plots in which they occur. Following the stabilizing process of sand dune, LA and LDMC have relatively strong positive relationship, and the dependence of theses 2 traits among communities is stronger than that among symbiotic species. Within and among communities, species adopted different strategies to adapt to the change of habitats in the process of sand dune fixation.

Key words: trait-gradient analysis, community mean trait values, Horqin sandy land, leaf area, specific area, leaf dry matter content

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