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首页> 外文期刊>Applied Soil Ecology >Effects of warming on carbon emission and microbial abundances across different soil depths of a peatland in the permafrost region under anaerobic condition
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Effects of warming on carbon emission and microbial abundances across different soil depths of a peatland in the permafrost region under anaerobic condition

机译：厌氧条件下泥土冻土区泥土泥土深度碳排放和微生物丰度的影响

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摘要

Peatlands in permafrost region are large carbon pools sensitive to global warming. However, the effects of increased temperature on carbon emissions and associated microbial abundances of peatlands under anaerobic condition remain largely unknown, especially when considering depths. For supplementing the deficiency about this, we collected soil from 0 to 150 cm depth of a permafrost peatland in the Great Hing'an Mountain and incubated at 5 and 15 degrees C for 55 days under anaerobic condition. Soil CO2 and CH4 emissions were detected during incubation, and inorganic nitrogen, dissolved organic carbon, and carbon-cycling microbial abundances were analyzed at the end of incubation. Results showed that emission rates and cumulative emissions amount of CO2 and CH4 at 15 degrees C across all soil depths were higher than those observed at 5 degrees C. Specifically, 0-20 cm and 20-40 cm layers had the highest CO2 emission rates and cumulative emission amounts, whereas the 40-60 cm and 60-80 cm layers had the highest CH4 emission rates and cumulative emission amounts. Mean temperature sensitivity (Q(10)) values of CO2 and CH(4 )were 2.39 and 55.49 respectively. Q(10) values of bacteria, fungi, archaea, methanogen, and methanotroph abundances were 1.17, 3.85, 1.75, 1.68, and 1.66 respectively, which were calculated by the abundance ratio of microbial functional gene at 15 degrees C and 5 degrees C. Similar to the trend of CO2 emissions, high bacteria, fungi, archaea, methanogen, and methanotroph functional gene abundances were also observed in 0-20 cm and 20-40 cm layers, and such abundances increased along with temperature increasing. In sum, elevated temperature enhances the carbon emission of peatland in permafrost region, and the warming simulated CO2 emission is linked to the abundances of carbon-cycling microorganisms.
机译：多年冻土地区的泥炭地是对全球变暖敏感的大型碳粉。然而，在厌氧条件下，抗碳排放温度和相关的微生物丰富的影响仍然很大程度上是未知的，特别是在考虑深度时。为了补充这一点的缺陷，我们将土壤从0到150厘米深度的伟大的兴安山灌注，并在厌氧条件下在5和15℃下孵育55天。在孵育期间检测到土壤二氧化碳和CH4排放，在孵育结束时分析无机氮，溶解的有机碳和碳循环微生物丰富。结果表明，在所有土壤深度跨越15摄氏度的二氧化碳和CH 4的排放率和累积排放量高于5摄氏度观察到的CO 2和CH 4。具体地，0-20cm和20-40cm层具有最高的CO 2排放率和累积发射量，而40-60cm和60-80cm层的层具有最高的CH4排放率和累积排放量。 CO 2和CH（4）的平均温度敏感度（Q（10））分别为2.39和55.49。 Q（10）细菌，真菌，古物组织，甲状腺素和甲蛋白丰富的值分别为1.17,3.85,1.75,1.68和1.66，通过微生物官能基因的丰度比在15℃和5℃下计算。类似于二氧化碳排放的趋势，在0-20cm和20-40cm的层中也观察到高细菌，真菌，古痤疮，甲状腺症和甲蛋白官能基因丰度，并且这种丰度随温度的增加而增加。总之，升高的温度增强了多年冻土区域的泥炭块的碳排放，并将升温的模拟CO2发射与碳循环微生物的丰度相关联。

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  • 来源
    《Applied Soil Ecology》 |2020年第1期|共9页
  • 作者

    Jiang Lei; Song Yanyu; Sun Li; Song Changchun; Wang Xianwei; Ma Xiuyan; Liu Chao; Gao Jinli;

  • 作者单位

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

    Chinese Acad Sci Northeast Inst Geog &

    Agroecol Key Lab Wetland Ecol &

    Environm Changchun 130102 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 土壤生态学;
  • 关键词

    Carbon cycle; Peat soil; Carbon decomposition; Methane; mcrA; pmoA;

    机译：碳循环;泥炭土;碳分解;甲烷;MCRA;PMOA;

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