YangTianChenEtAl2019

Référence

Yang, G., Tian, J., Chen, H., Jiang, L., Zhan, W., Hu, J., Zhu, E., Peng, C., Zhu, Q., Zhu, D., He, Y., Li, M., Dong, F. (2019) Peatland degradation reduces methanogens and methane emissions from surface to deep soils. Ecological Indicators, 106. (Scopus )

Résumé

Peatland degradation is expected to increase the rate of aerobic decomposition in surface soil (0–30 cm). Carbon stored in both the subsurface (30–60 cm) and deeper layers (>60 cm) of peatlands is also expected to be metabolized after degradation. However, little is known about how methane were emissions from subsurface and the deeper layers of peatlands during degradation. Three peatland degradation stages: S1, intact fen with high water table; S2, lightly degraded fen with a fluctuating water table; S3, heavily degraded fen with a lower water table were chosen to quantify the differences in CH4 emissions at different peatland degradation stages. CH4 emissions and methanogens of subsurface and deep soil were also measured to reveal the contribution rates of subsurface methane emission in this study. After four-years experiment, we found that the abundance of methanogens and methane emissions decreased as peatlands were more heavily degraded. We also found that the contribution rate of methane emission decreased from peat surface to subsurface and deep layer, and this trend varied with peatland degradation. A higher contribution rate was found in the subsurface methane emissions from S1 (32.63%) and S2 (19.94%). Importantly, when peatlands were heavily degraded, the subsurface changed from a CH4 source to a sink. Decreased methane emissions of the degraded peatlands was also associated with a high abundance of methanogens (R2 = 0.75, p < 0.05). Thus, we conclude that peatland degradation reduces methanogens and methane emissions from both surface and deep soils. Peatland degradation induced aerobic condition and substrate limitation are the main reasons for the reduced methane emission from Zoige peatland. © 2019

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@ARTICLE { YangTianChenEtAl2019,
    AUTHOR = { Yang, G. and Tian, J. and Chen, H. and Jiang, L. and Zhan, W. and Hu, J. and Zhu, E. and Peng, C. and Zhu, Q. and Zhu, D. and He, Y. and Li, M. and Dong, F. },
    TITLE = { Peatland degradation reduces methanogens and methane emissions from surface to deep soils },
    JOURNAL = { Ecological Indicators },
    YEAR = { 2019 },
    VOLUME = { 106 },
    NOTE = { cited By 0 },
    ABSTRACT = { Peatland degradation is expected to increase the rate of aerobic decomposition in surface soil (0–30 cm). Carbon stored in both the subsurface (30–60 cm) and deeper layers (>60 cm) of peatlands is also expected to be metabolized after degradation. However, little is known about how methane were emissions from subsurface and the deeper layers of peatlands during degradation. Three peatland degradation stages: S1, intact fen with high water table; S2, lightly degraded fen with a fluctuating water table; S3, heavily degraded fen with a lower water table were chosen to quantify the differences in CH4 emissions at different peatland degradation stages. CH4 emissions and methanogens of subsurface and deep soil were also measured to reveal the contribution rates of subsurface methane emission in this study. After four-years experiment, we found that the abundance of methanogens and methane emissions decreased as peatlands were more heavily degraded. We also found that the contribution rate of methane emission decreased from peat surface to subsurface and deep layer, and this trend varied with peatland degradation. A higher contribution rate was found in the subsurface methane emissions from S1 (32.63%) and S2 (19.94%). Importantly, when peatlands were heavily degraded, the subsurface changed from a CH4 source to a sink. Decreased methane emissions of the degraded peatlands was also associated with a high abundance of methanogens (R2 = 0.75, p < 0.05). Thus, we conclude that peatland degradation reduces methanogens and methane emissions from both surface and deep soils. Peatland degradation induced aerobic condition and substrate limitation are the main reasons for the reduced methane emission from Zoige peatland. © 2019 },
    AFFILIATION = { School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China; Key Laboratory of Mountain Ecological Restoration and Bioresource Utlization & Ecological Restoration Biodiversity Conservation, Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China; Zoige Peatland and Global Change Research Station, Chengdu Institute of Biology, Chinese Academy of SciencesHongyuan 624400, China; State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China; Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, China; Center of CEF/ESCER, Department of Biological Science, University of Quebec at Montreal, Montreal, H3C 3P8, Canada; Laboratory for Ecological Forecasting and Global Change, College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China },
    ART_NUMBER = { 105488 },
    AUTHOR_KEYWORDS = { Archaeal abundance; Carbon cycles; Global change; Peatland },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.ecolind.2019.105488 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85067484259&doi=10.1016%2fj.ecolind.2019.105488&partnerID=40&md5=276806f6f18bbfd41ff3833261468e20 },
}

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