植物生态学报 ›› 2021, Vol. 45 ›› Issue (5): 552-561.DOI: 10.17521/cjpe.2020.0293

• 研究论文 • 上一篇    下一篇

若尔盖退化泥炭地土壤原核微生物群落结构对水位恢复的短期响应

罗明没1,2, 陈悦1,2, 杨刚3, 胡斌1, 李玮1,2,*(), 陈槐4,*()   

  1. 1云南大学生态与环境学院, 高原湖泊生态与治理研究院, 昆明 650091
    2云南省高原山地生态与退化环境修复重点实验室, 昆明 650091
    3西南科技大学生命科学与工程学院, 四川绵阳 621010
    4中国科学院成都生物研究所, 成都 610041
  • 收稿日期:2020-08-27 接受日期:2020-11-20 出版日期:2021-05-20 发布日期:2021-01-07
  • 通讯作者: 李玮,陈槐
  • 作者简介:Chen H:chenhuai@cib.ac.cn)
    *(Li W:liweismiling@ynu.edu.cn;
  • 基金资助:
    国家自然科学基金(31700411);云南省应用基础研究计划(2018FD007)

Short-term response of soil prokaryotic community structure to water level restoration in degraded peatland of the Zoigê Plateau

LUO Ming-Mo1,2, CHEN Yue1,2, YANG Gang3, HU Bin1, LI Wei1,2,*(), CHEN Huai4,*()   

  1. 1School of Ecology and Environmental Sciences, Yunnan University, Institute for Ecological Research and Pollution Control of Plateau Lakes, Kunming 650091, China
    2Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Kunming 650091, China
    3School of Life Sciences and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
    4Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2020-08-27 Accepted:2020-11-20 Online:2021-05-20 Published:2021-01-07
  • Contact: LI Wei,CHEN Huai
  • Supported by:
    the National Natural Science Foundation of China(31700411);the Yunnan Province Applied Basic Research Project(2018FD007)

摘要:

退化泥炭地的恢复是目前受关注的重要环境问题。若尔盖退化泥炭地原核微生物群落结构对水位恢复的早期响应可以为其生态恢复提供理论依据。为探究原核微生物群落结构对水位恢复的短期响应, 该研究以若尔盖退化泥炭地为研究对象, 设置水位恢复(10和30 cm)和对照组(-10 cm), 进行了1年野外原位水位恢复试验。采集0-15 cm土壤样品, 测定土壤有机碳(SOC)、总氮(TN)、总磷(TP)含量和pH等化学性质, 采用16S rRNA基因高通量测序技术分析微生物群落结构。结果表明: 水位恢复一定程度上能提高SOC、TN、TP含量及其化学计量比, 但与对照组差异不显著。主要优势微生物在门水平为酸杆菌(Acidobacteria)、变形菌(Proteobacteria)和疣微菌(Verrucomicrobia)。短期水位恢复(10和30 cm)对土壤原核微生物的α多样性没有显著影响, 而只是显著降低疣微菌和Spartobacteria的相对丰度, 增加了产甲烷菌种类。疣微菌和Spartobacteria相对丰度与水位和土壤pH呈显著负相关关系。退化泥炭地水位恢复过程中原核微生物群落结构对C:P、N:P和SOC含量响应较为敏感。综上, 短期水位恢复没有改变原核微生物α多样性, 而主要降低了疣微菌和Spartobacteria的相对丰度, 增加了产甲烷菌种类, 这将可能导致甲烷产生途径发生变化。土壤C:P、N:P和SOC含量控制了退化泥炭地随短期水位恢复过程中原核微生物群落结构变异。该研究在一定程度上丰富了原核微生物群落结构对短期水位响应的认识。

关键词: 泥炭地, 水位, 环境因子, 土壤原核微生物

Abstract:

Aims Degraded peatlands recovery is an important environmental issue of current concern. Exploring the response of Zoigê degraded peatlands prokaryotic microbial community structure to water level recovery could provide foundation for the ecological restoration.
Methods For exploring the response of prokaryotic microbial community structure to water level recovery in the short-term, we selected Zoigê degraded peatland and designed two water level recovery (10 and 30 cm) with a control group (-10 cm) in situ test from year 2014 to 2015. We collected 0-15 cm soil samples and determined soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP) content and soil pH, we also analyzed microbial community structure by using 16S rRNA high throughput sequencing technique.
Important findings The results showed that water level recovery could improve the content of SOC, TN, TP and its stoichiometric ratio to a certain extent, however, there was no significant difference with the control group. The dominant microorganisms at the phylum level were Acidobacteria, Proteobacteria and Verrucomicrobia. Short-term water level recovery (10 and 30 cm) had no significant effect on the alpha diversity of prokaryotic microbial, but significantly reduced the relative abundance of Verrucomicrobia and Spartobacteria, while having an increase in methanogenic bacteria. Soil pH and water level were negatively correlated with the abundance of Verrucomicrobia and Spartobacteria. Prokaryotic microbial community structure is sensitive to soil C:P, N:P and SOC content. In a word, short-term water recovery hasn’t changed prokaryotic microbial alpha diversity, but increased the methanogenic bacteria, which will probably stimulate methane production pathways. Soil C:P, N:P and SOC content control the structure variation of prokaryotic microbial community in degraded peatlands during short-term water level restoration process. Our findings enrich the understanding of the structure of prokaryotic microbial community in response to short-term water level.

Key words: peatland, water level, environmental factor, soil prokaryotic microbial