Preprints
https://doi.org/10.5194/bg-2018-186
https://doi.org/10.5194/bg-2018-186

  27 Apr 2018

27 Apr 2018

Status: this preprint has been retracted.

Ecosystem respiration in coastal tidal flats can be modelled from air temperature, plant biomass and inundation regime

Xueyang Yu1,2, Siyuan Ye1,2, Linda Olsson3,4, Mengjie Wei1,2, Ken W. Krauss5, and Hans Brix3,4 Xueyang Yu et al.
  • 1Key Laboratory of Coastal Wetland Biogeosciences, China Geological Survey, Qingdao Institute of Marine Geology, Qingdao, 266071, China
  • 2Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China
  • 3Aarhus University, Department of Bioscience, Aarhus, 8000C, Denmark
  • 4Sino-Danish Centre for Education and Research, Aarhus, 8000C, Denmark
  • 5U.S. Geological Survey, Wetland and Aquatic Research Center, Lafayette, Louisiana, 70506, United States of America

Abstract. Ecosystem respiration contributes greatly to carbon emissions and losses in coastal wetlands. To gain a better understanding of gaseous carbon loss from a coastal wetland covered by seablite (Suaeda salsa Pall.) and to evaluate the influence of environmental factors on ecosystem respiration, a multi-year in-situ experiment was carried out during the growing season of 2012 through part of 2014. By partitioning total carbon dioxide (CO2) flux into soil respiration (Rsoil) and plant respiration (Rp), we found that during mid-summer, ecosystem CO2 respiration rates (Reco) were within the range of 844.5 to 1150.0 mg CO2 m−2−1, while Reco was as low as 31.7 to 110.8 mg CO2 m−2 h−1 at the beginning and the end of growing seasons. Aboveground S. salsa plant material comprised 79.1 % of total biomass on average, and Rp dominated Reco during inundated periods. It is estimated that 1 gram of soil-emergent S. salsa biomass (dry weight) could produce approximately 1.41 to 1.46 mg CO2 per hour during mid-summer. When water level was below the soil surface, soil microbial and belowground root respiration (Rs+r) was exponentially correlated with air temperature. Based on our observation, an empirical model was developed to estimate system respiration of the S. salsa marsh in the Liaohe River Delta, Northeast China. This model can be applied for regional carbon budget estimation purposes from S. salsa wetlands throughout Northeast China.

This preprint has been retracted.

Xueyang Yu et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Xueyang Yu et al.

Xueyang Yu et al.

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This preprint has been retracted.

Short summary
Partition ecosystem respiration of a Suaeda salsa wetland into plant and soil derived efflux according to in-situ observations. Quantify the interactive influence of air temperatre, biomass and water regime. Develop a rapid assessment method which could be potentially used to project regional gaseous carbon loss from coastal Suaeda salsa wetlands.
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