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Changes in diversity and importance of clonal plants during sand dune succession in northeastern China

机译：东北沙丘演替过程中无性系植物多样性和重要性的变化

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摘要

Many major biomes throughout the world are dominated by plants with clonal growth forms. While many recent studies have examined the effects of clo-nality on the growth of individual plants, relatively few studies have tested the community level effects of clo-nality as a function of environmental characteristics. By investigating six sand dune sites that have undergone different numbers of years of natural restoration constituting a succession sere, we quantified if the abundance and importance of clonal plants was related to successional age in the stressful environment of a semi-arid sand dune region in northeastern China. We expected that clonal plants would dominate at every stage of the succession sere. We also predicted that species diversity would decrease in later stages of the succession sere due to the extremely high proportion of clonal plants in the community. Our results showed that, through 45 years of succession, the total plant species richness and Shannon-Wiener diversity index continually increased. While the species number of clonal plants was consistently low during the succession, the importance of clonal plants increased gradually from none at 3 years to 49 % of the total, approximately equal to that of aclonal plants, at the 45-year site. Clonal plants with phalanx strategies were more important than guerillas at all ages in sand dune succession. At the beginning and early stages of sand dune succession, aclonal plants were more important than clonal plants, perhaps due to greater seed propagation. The distribution or arrangement of aclonal and clonal plants in the whole process of sand dune complemented each other. The results presented give new perceptions on the function of biodiversity in maintaining ecosystems.
机译：全世界许多主要的生物群落都被具有克隆生长形式的植物所控制。尽管最近的许多研究都研究了克隆对单株植物生长的影响，但是相对较少的研究测试了克隆对环境水平的影响对社区的影响。通过调查六个经历了不同年限的自然恢复构成沙丘的沙丘遗址，我们定量了在东北半干旱沙丘地区的压力环境下克隆植物的丰度和重要性是否与演替年龄有关。中国。我们预计克隆植物将在演替阶段的每个阶段占主导地位。我们还预测，由于群落中克隆植物的比例极高，物种多样性将在演替阶段的后期减少。我们的结果表明，经过45年的演替，总植物物种丰富度和Shannon-Wiener多样性指数不断提高。尽管在演替过程中无性系植物的种类数量一直很低，但无性植物的重要性从3年的无植物逐渐增加到总数的49％，在45年的时期中几乎与无性植物相同。在所有年龄段的沙丘演替中，采用方阵策略的克隆植物都比游击队更为重要。在沙丘演替的开始和早期阶段，无性植物比无性植物更重要，这可能是由于种子繁殖更大。在沙丘的整个过程中，无性和无性植物的分布或排列是互补的。提出的结果使人们对生物多样性在维持生态系统中的功能有了新的认识。

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  • 来源
    《Ecological research》 |2014年第3期|393-399|共7页
  • 作者

    Ji-Yi Zhang; Ying-Xiang Wu;

  • 作者单位

    School of Petrochemical Engineering, Lanzhou University of Technology, 287 Langongping Road, Qilihe District, Lanzhou 730050, People's Republic of China;

    School of Civil Engineering, Lanzhou University of Technology, 287 Langongping Road, Qilihe District, Lanzhou 730050, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Clonal plants; Species diversity; Succession; Ecological restoration; Sand dune;

    机译：克隆植物;物种多样性;演替;生态恢复;沙丘;

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