Articles | Volume 13, issue 2
https://doi.org/10.5194/bg-13-517-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/bg-13-517-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
26 Jan 2016
Research article |
| 26 Jan 2016
Dissolved organic carbon lability and stable isotope shifts during microbial decomposition in a tropical river system
N. Geeraert
CORRESPONDING AUTHOR
KU Leuven, Department of Earth and Environmental
Sciences, Leuven, Belgium
F. O. Omengo
KU Leuven, Department of Earth and Environmental
Sciences, Leuven, Belgium
Kenya Wildlife Service, Nairobi, Kenya
G. Govers
KU Leuven, Department of Earth and Environmental
Sciences, Leuven, Belgium
S. Bouillon
KU Leuven, Department of Earth and Environmental
Sciences, Leuven, Belgium
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Cited
12 citations as recorded by crossref.
- The influence of the deep subtropical reservoir on the karstic riverine carbon cycle and its regulatory factors: Insights from the seasonal and hydrological changes Y. Yi et al. 10.1016/j.watres.2022.119267
- Unified concepts for understanding and modelling turnover of dissolved organic matter from freshwaters to the ocean: the UniDOM model T. Anderson et al. 10.1007/s10533-019-00621-1
- The composition of organic phosphorus in a river during the springtime irrigation period R. Shinohara et al. 10.1016/j.ejrh.2022.101238
- River ecosystem processes: A synthesis of approaches, criteria of use and sensitivity to environmental stressors D. von Schiller et al. 10.1016/j.scitotenv.2017.04.081
- Shifts in the carbon dynamics in a tropical lowland river system (Tana River, Kenya) during flooded and non-flooded conditions N. Geeraert et al. 10.1007/s10533-017-0292-2
- Soil organic carbon controls dissimilatory nitrate reduction to ammonium along a freshwater-oligohaline gradient of Min River Estuary, Southeast China X. Li et al. 10.1016/j.marpolbul.2020.111696
- Soil microbial CNP and respiration responses to organic matter and nutrient additions: Evidence from a tropical soil incubation J. Soong et al. 10.1016/j.soilbio.2018.04.011
- Characteristics and implication of stable carbon isotope in high arsenic groundwater systems in the northwest Hetao Basin, Inner Mongolia, China Y. Zhou et al. 10.1016/j.jseaes.2018.05.018
- Uptake of ammonium and soluble reactive phosphorus in forested streams: influence of dissolved organic matter composition A. Coble et al. 10.1007/s10533-016-0284-7
- Land-use intensity alters both the source and fate of CO2 within eight sub-tropical estuaries N. Wells et al. 10.1016/j.gca.2019.09.042
- Cycling of black carbon and black nitrogen in the hydro-geosphere: Insights on the paradigm, pathway, and processes S. Mukherjee & M. Kumar 10.1016/j.scitotenv.2020.144711
- Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China D. Sun et al. 10.1016/j.orggeochem.2017.12.009
12 citations as recorded by crossref.
- The influence of the deep subtropical reservoir on the karstic riverine carbon cycle and its regulatory factors: Insights from the seasonal and hydrological changes Y. Yi et al. 10.1016/j.watres.2022.119267
- Unified concepts for understanding and modelling turnover of dissolved organic matter from freshwaters to the ocean: the UniDOM model T. Anderson et al. 10.1007/s10533-019-00621-1
- The composition of organic phosphorus in a river during the springtime irrigation period R. Shinohara et al. 10.1016/j.ejrh.2022.101238
- River ecosystem processes: A synthesis of approaches, criteria of use and sensitivity to environmental stressors D. von Schiller et al. 10.1016/j.scitotenv.2017.04.081
- Shifts in the carbon dynamics in a tropical lowland river system (Tana River, Kenya) during flooded and non-flooded conditions N. Geeraert et al. 10.1007/s10533-017-0292-2
- Soil organic carbon controls dissimilatory nitrate reduction to ammonium along a freshwater-oligohaline gradient of Min River Estuary, Southeast China X. Li et al. 10.1016/j.marpolbul.2020.111696
- Soil microbial CNP and respiration responses to organic matter and nutrient additions: Evidence from a tropical soil incubation J. Soong et al. 10.1016/j.soilbio.2018.04.011
- Characteristics and implication of stable carbon isotope in high arsenic groundwater systems in the northwest Hetao Basin, Inner Mongolia, China Y. Zhou et al. 10.1016/j.jseaes.2018.05.018
- Uptake of ammonium and soluble reactive phosphorus in forested streams: influence of dissolved organic matter composition A. Coble et al. 10.1007/s10533-016-0284-7
- Land-use intensity alters both the source and fate of CO2 within eight sub-tropical estuaries N. Wells et al. 10.1016/j.gca.2019.09.042
- Cycling of black carbon and black nitrogen in the hydro-geosphere: Insights on the paradigm, pathway, and processes S. Mukherjee & M. Kumar 10.1016/j.scitotenv.2020.144711
- Sources, distributions, and burial efficiency of terrigenous organic matter in surface sediments from the Yellow River mouth, northeast China D. Sun et al. 10.1016/j.orggeochem.2017.12.009
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Short summary
Rivers transport a large amount of carbon as dissolved organic carbon (DOC). Our incubation experiments on water of the Tana River, Kenya, showed that microbial decomposition of 10–60 % of the initial DOC occurred within the first 24–48 h. Simultaneously, there was a decrease in isotopic composition, indicating that DOC derived from C4 vegetation is preferentially decomposed. This has implications for the assessment of vegetation in a catchment based on isotope signatures of riverine carbon.
Rivers transport a large amount of carbon as dissolved organic carbon (DOC). Our incubation...
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