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首页> 外文期刊>Ecological research >Responses of soil bacterial compositions to concentrations of nitrogen forms in the process of Moso bamboo invasion
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Responses of soil bacterial compositions to concentrations of nitrogen forms in the process of Moso bamboo invasion

机译：毛竹入侵过程中土壤细菌成分对氮素形态的响应

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摘要

We analyzed and compared the soil bacterial diversity and difference in community composition in a Moso bamboo forest, a mixed Moso bamboo-conifer (Pinus massoniana) forest, and a coniferous forest. The relative abundances of Acidobacteria and Planctomycetes were significantly lower in the Moso bamboo forest, while those of Actinobacteria, Bacteroidetes, TM-7 and Chlamydiae were greatly increased. The alpha-diversity in the Moso bamboo forest was different from that in the other two forest types but was not statistically distinguished. Principal coordinates analysis suggested that the invasion of Moso bamboo affected the community composition and diversity of soil bacteria. This impact was associated with the soil biochemical environment, as evidenced by increased mean values of soil organic carbon (C) and total nitrogen (N), significant increases in microbial biomass C and N, and a decrease in the NO3--N content, which indicated that the nitrification rate was reduced in the mixed Moso bamboo-conifer forest. There were no overall correlations between the dominant bacterial phyla and soil biochemical gradients; however, individual dominant phyla correlated with the concentration of N forms, which indicated that the responses of bacteria were sensitive to, and varied depending on, the concentration of soil N forms. In addition, there were correlations between non-dominant bacterial phyla with respect to operational taxonomic unit proportions <1.0%, and overall gradients of water-soluble organic N and NO3--N. The results of this study showed that the changes in soil bacterial flora are associated with the changes in concentration of N forms during the invasion of Moso bamboo.
机译：我们分析并比较了毛竹林，毛竹针叶林（Pinus massoniana）和针叶林的土壤细菌多样性和群落组成的差异。毛竹林中酸性细菌和扁平菌的相对丰度明显降低，而放线菌，拟杆菌，TM-7和衣原体的相对丰度则大大增加。毛竹林中的阿尔法多样性不同于其他两种森林类型，但没有统计学上的区别。主坐标分析表明，毛竹入侵影响了土壤细菌的群落组成和多样性。这种影响与土壤生化环境有关，这可以通过土壤有机碳（C）和总氮（N）平均值的增加，微生物生物量C和N的显着增加以及NO3--N含量的减少来证明，这表明在毛竹混交林中硝化速率降低。优势菌门与土壤生化梯度之间没有总体相关性；然而，个别优势种与氮形态的浓度相关，这表明细菌的反应对土壤氮形态的浓度敏感并随其变化。此外，在非主要细菌门上，相对于操作分类单位比例<1.0％，与水溶性有机氮和NO3--N的总体梯度之间存在相关性。这项研究的结果表明，在毛竹入侵期间，土壤细菌菌群的变化与氮形态的浓度变化有关。

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  • 来源
    《Ecological research》 |2019年第6期|743-752|共10页
  • 作者

    Li Weicheng; Sheng Haiyan; Liu Yaoyao; Chen Weijie;

  • 作者单位

    China Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou Zhejiang Peoples R China|Southwest Forestry Univ Coll Life Sci Kunming Yunnan Peoples R China;

    Hangzhou Environm Protect Sci Inst Hangzhou Zhejiang Peoples R China;

    Southwest Forestry Univ Coll Life Sci Kunming Yunnan Peoples R China;

    Hangzhou Normal Univ Coll Life & Environm Sci Hangzhou Zhejiang Peoples R China;

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

    bacterial diversity; invasion; Moso bamboo-conifer forest; nitrate N; soil N forms;

    机译：细菌多样性侵入;毛竹针叶林;硝酸盐氮氮素形态;

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