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Greenhouse gas production in a pond sediment: Effects of temperature, nitrate, acetate and season

Stadmark, Johanna LU and Leonardson, Lars LU (2007) In Science of the Total Environment 387(1-3). p.194-205
Abstract
In this paper we investigate the impact of nitrate (NO3-) concentration and temperature on the production of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). We studied sediment collected during spring, summer and autumn from a constructed pond in South Sweden. Homogenised sediment samples were dark incubated in vitro under N-2 atmosphere at 13 degrees C and 20 degrees C after addition of five NO3- concentrations, between 0 and 16 mg NO3- -N per litre. We found higher net production of N2O and CO, at the higher temperature. Moreover, increased NO3- concentrations had strong positive impact on the N2O3 concentration, but no effect on CH4 and CO2 production. The lack of response in CO2 is suggested to be due to the use of... (More)
In this paper we investigate the impact of nitrate (NO3-) concentration and temperature on the production of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). We studied sediment collected during spring, summer and autumn from a constructed pond in South Sweden. Homogenised sediment samples were dark incubated in vitro under N-2 atmosphere at 13 degrees C and 20 degrees C after addition of five NO3- concentrations, between 0 and 16 mg NO3- -N per litre. We found higher net production of N2O and CO, at the higher temperature. Moreover, increased NO3- concentrations had strong positive impact on the N2O3 concentration, but no effect on CH4 and CO2 production. The lack of response in CO2 is suggested to be due to the use of alternative oxidants as electron acceptors. Interaction between NO3- and temperature suggests a further increase of N-2O, net production when both NO3 and temperature are high. Our interpretation of the CH4 data is that at high concentrations of NO3 temperature is of less importance for CH4 production. We also found that at 13 degrees C CH4 production was substrate limited and that the addition of acetate increased CH4 as well as CO2 production. There was a seasonal effect on gas production potential, with more CH4 and NO produced in spring than in summer. Re-calculation of the gas concentrations into global warming potential (GWP) units (i.e. CO2, CH4, and N2O transferred to CO2 equivalents) shows that GWP increases with temperature. However, under environmental conditions generally occurring in South Swedish ponds, i.e. low temperature and high NO3 concentration during spring and high temperature and low NO3 concentration during summer, NO3- concentration is of minor importance. (C) 2007 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
pond sediment, substrate availability, methane, carbon dioxide, nitrous oxide, nitrate loading
in
Science of the Total Environment
volume
387
issue
1-3
pages
194 - 205
publisher
Elsevier
external identifiers
  • wos:000250420200018
  • scopus:36649025272
ISSN
1879-1026
DOI
10.1016/j.scitotenv.2007.07.039
language
English
LU publication?
yes
id
5ead3820-5e38-4a67-8b2c-5619b27650a8 (old id 651787)
date added to LUP
2008-01-03 08:40:24
date last changed
2017-10-22 03:50:10
@article{5ead3820-5e38-4a67-8b2c-5619b27650a8,
  abstract     = {In this paper we investigate the impact of nitrate (NO3-) concentration and temperature on the production of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). We studied sediment collected during spring, summer and autumn from a constructed pond in South Sweden. Homogenised sediment samples were dark incubated in vitro under N-2 atmosphere at 13 degrees C and 20 degrees C after addition of five NO3- concentrations, between 0 and 16 mg NO3- -N per litre. We found higher net production of N2O and CO, at the higher temperature. Moreover, increased NO3- concentrations had strong positive impact on the N2O3 concentration, but no effect on CH4 and CO2 production. The lack of response in CO2 is suggested to be due to the use of alternative oxidants as electron acceptors. Interaction between NO3- and temperature suggests a further increase of N-2O, net production when both NO3 and temperature are high. Our interpretation of the CH4 data is that at high concentrations of NO3 temperature is of less importance for CH4 production. We also found that at 13 degrees C CH4 production was substrate limited and that the addition of acetate increased CH4 as well as CO2 production. There was a seasonal effect on gas production potential, with more CH4 and NO produced in spring than in summer. Re-calculation of the gas concentrations into global warming potential (GWP) units (i.e. CO2, CH4, and N2O transferred to CO2 equivalents) shows that GWP increases with temperature. However, under environmental conditions generally occurring in South Swedish ponds, i.e. low temperature and high NO3 concentration during spring and high temperature and low NO3 concentration during summer, NO3- concentration is of minor importance. (C) 2007 Elsevier B.V. All rights reserved.},
  author       = {Stadmark, Johanna and Leonardson, Lars},
  issn         = {1879-1026},
  keyword      = {pond sediment,substrate availability,methane,carbon dioxide,nitrous oxide,nitrate loading},
  language     = {eng},
  number       = {1-3},
  pages        = {194--205},
  publisher    = {Elsevier},
  series       = {Science of the Total Environment},
  title        = {Greenhouse gas production in a pond sediment: Effects of temperature, nitrate, acetate and season},
  url          = {http://dx.doi.org/10.1016/j.scitotenv.2007.07.039},
  volume       = {387},
  year         = {2007},
}