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Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream

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Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream. / Arce, Maria Isabel; Bengtsson, Mia M.; von Schiller, Daniel; Zak, Dominik; Täumer, Jana; Urich, Tim; Singer, Gabriel.

I: Biogeochemistry, Bind 155, Nr. 3, 09.2021, s. 381-400.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Arce, MI, Bengtsson, MM, von Schiller, D, Zak, D, Täumer, J, Urich, T & Singer, G 2021, 'Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream', Biogeochemistry, bind 155, nr. 3, s. 381-400. https://doi.org/10.1007/s10533-021-00831-6

APA

Arce, M. I., Bengtsson, M. M., von Schiller, D., Zak, D., Täumer, J., Urich, T., & Singer, G. (2021). Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream. Biogeochemistry, 155(3), 381-400. https://doi.org/10.1007/s10533-021-00831-6

CBE

Arce MI, Bengtsson MM, von Schiller D, Zak D, Täumer J, Urich T, Singer G. 2021. Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream. Biogeochemistry. 155(3):381-400. https://doi.org/10.1007/s10533-021-00831-6

MLA

Vancouver

Arce MI, Bengtsson MM, von Schiller D, Zak D, Täumer J, Urich T o.a. Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream. Biogeochemistry. 2021 sep.;155(3):381-400. https://doi.org/10.1007/s10533-021-00831-6

Author

Arce, Maria Isabel ; Bengtsson, Mia M. ; von Schiller, Daniel ; Zak, Dominik ; Täumer, Jana ; Urich, Tim ; Singer, Gabriel. / Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream. I: Biogeochemistry. 2021 ; Bind 155, Nr. 3. s. 381-400.

Bibtex

@article{e3f7369bdbb34d26a73b3d5fe368a79d,
title = "Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream",
abstract = "Droughts are recognized to impact global biogeochemical cycles. However, the implication of desiccation on in-stream carbon (C) cycling is not well understood yet. We subjected sediments from a lowland, organic rich intermittent stream to experimental desiccation over a 9-week-period to investigate temporal changes in microbial functional traits in relation to their redox requirements, carbon dioxide (CO2) and methane (CH4) fluxes and water-soluble organic carbon (WSOC). Concurrently, the implications of rewetting by simulated short rainfalls (4 and 21 mm) on gaseous C fluxes were tested. Early desiccation triggered dynamic fluxes of CO2 and CH4 with peak values of 383 and 30 mg C m−2 h−1 (mean ± SD), respectively, likely in response to enhanced aerobic mineralization and accelerated evasion. At longer desiccation, CH4 dropped abruptly, likely because of reduced abundance of anaerobic microbial traits. The CO2 fluxes ceased later, suggesting aerobic activity was constrained only by extended desiccation over time. We found that rainfall boosted fluxes of CO2, which were modulated by rainfall size and the preceding desiccation time. Desiccation also reduced the amount of WSOC and the proportion of labile compounds leaching from sediment. It remains questionable to which extent changes of the sediment C pool are influenced by respiration processes, microbial C uptake and cell lysis due to drying-rewetting cycles. We highlight that the severity of the dry period, which is controlled by its duration and the presence of precipitation events, needs detailed consideration to estimate the impact of intermittent flow on global riverine C fluxes.",
keywords = "Carbon dioxide, Dry riverbeds, Leaching, Methane, Rewetting, WSOC",
author = "Arce, {Maria Isabel} and Bengtsson, {Mia M.} and {von Schiller}, Daniel and Dominik Zak and Jana T{\"a}umer and Tim Urich and Gabriel Singer",
year = "2021",
month = sep,
doi = "10.1007/s10533-021-00831-6",
language = "English",
volume = "155",
pages = "381--400",
journal = "Biogeochemistry",
issn = "0168-2563",
publisher = "Springer",
number = "3",

}

RIS

TY - JOUR

T1 - Desiccation time and rainfall control gaseous carbon fluxes in an intermittent stream

AU - Arce, Maria Isabel

AU - Bengtsson, Mia M.

AU - von Schiller, Daniel

AU - Zak, Dominik

AU - Täumer, Jana

AU - Urich, Tim

AU - Singer, Gabriel

PY - 2021/9

Y1 - 2021/9

N2 - Droughts are recognized to impact global biogeochemical cycles. However, the implication of desiccation on in-stream carbon (C) cycling is not well understood yet. We subjected sediments from a lowland, organic rich intermittent stream to experimental desiccation over a 9-week-period to investigate temporal changes in microbial functional traits in relation to their redox requirements, carbon dioxide (CO2) and methane (CH4) fluxes and water-soluble organic carbon (WSOC). Concurrently, the implications of rewetting by simulated short rainfalls (4 and 21 mm) on gaseous C fluxes were tested. Early desiccation triggered dynamic fluxes of CO2 and CH4 with peak values of 383 and 30 mg C m−2 h−1 (mean ± SD), respectively, likely in response to enhanced aerobic mineralization and accelerated evasion. At longer desiccation, CH4 dropped abruptly, likely because of reduced abundance of anaerobic microbial traits. The CO2 fluxes ceased later, suggesting aerobic activity was constrained only by extended desiccation over time. We found that rainfall boosted fluxes of CO2, which were modulated by rainfall size and the preceding desiccation time. Desiccation also reduced the amount of WSOC and the proportion of labile compounds leaching from sediment. It remains questionable to which extent changes of the sediment C pool are influenced by respiration processes, microbial C uptake and cell lysis due to drying-rewetting cycles. We highlight that the severity of the dry period, which is controlled by its duration and the presence of precipitation events, needs detailed consideration to estimate the impact of intermittent flow on global riverine C fluxes.

AB - Droughts are recognized to impact global biogeochemical cycles. However, the implication of desiccation on in-stream carbon (C) cycling is not well understood yet. We subjected sediments from a lowland, organic rich intermittent stream to experimental desiccation over a 9-week-period to investigate temporal changes in microbial functional traits in relation to their redox requirements, carbon dioxide (CO2) and methane (CH4) fluxes and water-soluble organic carbon (WSOC). Concurrently, the implications of rewetting by simulated short rainfalls (4 and 21 mm) on gaseous C fluxes were tested. Early desiccation triggered dynamic fluxes of CO2 and CH4 with peak values of 383 and 30 mg C m−2 h−1 (mean ± SD), respectively, likely in response to enhanced aerobic mineralization and accelerated evasion. At longer desiccation, CH4 dropped abruptly, likely because of reduced abundance of anaerobic microbial traits. The CO2 fluxes ceased later, suggesting aerobic activity was constrained only by extended desiccation over time. We found that rainfall boosted fluxes of CO2, which were modulated by rainfall size and the preceding desiccation time. Desiccation also reduced the amount of WSOC and the proportion of labile compounds leaching from sediment. It remains questionable to which extent changes of the sediment C pool are influenced by respiration processes, microbial C uptake and cell lysis due to drying-rewetting cycles. We highlight that the severity of the dry period, which is controlled by its duration and the presence of precipitation events, needs detailed consideration to estimate the impact of intermittent flow on global riverine C fluxes.

KW - Carbon dioxide

KW - Dry riverbeds

KW - Leaching

KW - Methane

KW - Rewetting

KW - WSOC

UR - http://www.scopus.com/inward/record.url?scp=85111129673&partnerID=8YFLogxK

U2 - 10.1007/s10533-021-00831-6

DO - 10.1007/s10533-021-00831-6

M3 - Journal article

AN - SCOPUS:85111129673

VL - 155

SP - 381

EP - 400

JO - Biogeochemistry

JF - Biogeochemistry

SN - 0168-2563

IS - 3

ER -