ANR ORCA WP2

Rationale

The possibility that soil surfaces can exhibit strong CA activity must be considered, because this would enhance COS uptake and CO2-H2O isotopic exchange rate in soils. This aspect, neglected in many global CO18O studies, has been recently shown to play an important role in the global CO18O mass balance and for determining the magnitude of global GPP using this tracer. Recent studies also indicate that soil CA activity may be variable over the growing season and across different ecosystems, or that soil COS uptake from different soils respond strongly to soil temperature and moisture and exhibit different maxima and optima between soils or growing seasons. So far it is not clear what causes this spatial and temporal variability in soil CA activity. Potentially it could be caused by variations in the population size or composition of CA-containing organisms. Such variations in community structure can alter the rate of metabolic processes such as respiration, despite maintaining similar biomass profiles. Thus, in addition to pure enzymatic or physical (diffusion) responses to soil water content, carbon availability and temperature, it may be plausible that shifts in community composition could also lead to changes in bulk soil CA activity. Given the importance of this enzyme in the carbon cycle it is becoming clear that a deeper understanding of its regulation by soil communities is urgently required. Until then scaling and modelling studies using CA-mediated tracers such as COS and CO18O cannot partition gross photosynthetic rates robustly..

Objective

The overall goal of WP2 is to provide a description of the COS and CO18O fluxes from soil surfaces, how they vary with soil physical properties and respond to environmental conditions.

Results and publications

Peer-reviewed articles

Sauze J., Jones S., Wingate L., Wohl S. & Ogée J. (2018) The role of soil pH on soil carbonic anhydrase activity. Biogeosciences, 15, 597–612, doi: 10.5194/bg-15-597-2018. logo_openaccess

Jones S., Ogée J., Sauze J., Wohl S., Saavedra N., Fernandez-Prado N., Maire J., Launois T., Bosc A., & Wingate L. (2017) Non-destructive estimates of soil carbonic anhydrase activity and soil water oxygen isotope composition. Hydrology and Earth System Sciences, 21:6363-6377, doi: 10.5194/hess-21-6363-2017logo_openaccess

Sauze J., Ogée J., Maron P.A., Crouzet O., Nowak V., Wohl S., Kaisermann A., Jones S. & Wingate L. (2017) The interaction of soil phototrophs and fungi with pH and their impact on soil CO2, CO18O and OCS exchange. Soil, Biology & Biochemistry, 115, 371-382, doi: 10.1016/j.soilbio.2017.09.009logo_openaccess

Ogée J., Sauze J., Kesselmeier J., Genty B., Van Diest H., Launois T., Wingate L. (2016) A new mechanistic framework to predict OCS fluxes from soils. Biogeosciences, 13, 2221–2240, doi:10.5194/bg-13-2221-2016. logo_openaccess

Gangi L., Rothfuss Y., Ogée J., Wingate L., Vereecken H., Brüggemann N. (2015) A new method for in situ measurements of delta-18O of soil water and CO2 with high time resolution. Vadose Zone Journal, 14(8), doi:10.2136/vzj2014.11.0169. logo_link

Communications at international conferences

Gimeno T., Royles J., Ogée J., Jones S., Burlett R., West J., Sauze J., Wohl S., Genty B., Griffiths H., & Wingate L. (2016) Investigating the impact of light and water status on the exchange of COS, 13CO2, CO18O and H218O from bryophytes. European Geophysical Union (EGU) Annual Meeting, Vienna, Austria, 17th-22nd April 2016.

Jones T., Sauze J., Ogée J., Wohl S., Bosc A. & Wingate L. (2016) Non-destructive measurement of carbonic anhydrase activity and the oxygen isotope composition of soil water. European Geophysical Union (EGU) Annual Meeting, Vienna, Austria, 17th-22nd April 2016.

Launois T., Ogée J., Commane R., Wehr R., Meredith L., Munger B., Nelson D., Saleska S., Wofsy S., Zanhiser M., Wingate L. (2016) Modelling the impact of soil carbonic anhydrase on the net ecosystem exchange of OCS at Harvard forest using the MuSICA model. European Geophysical Union (EGU) Annual Meeting, Vienna, Austria, 17th-22nd April 2016.

Ogée J., Wehr R., Commane R., Launois T., Meredith L., Munger B., Nelson D., Saleska S., Zahniser M., Wofsy S. & Wingate L. (2016) Developing multi-tracer approaches to constrain the parameterisation of leaf and soil CO2 and H2O exchange in land surface models. European Geophysical Union (EGU) Annual Meeting, Vienna, Austria, 17th-22nd April 2016.

Wingate L., Ogée J., Launois T.  & Cuntz M. (2016) Soil processes and climate models. Inaugral workshop for the International Soil Modelling Consortium, Austin, Texas, USA 29th March-1st April 2016. (invited)

Ogée J., Sauze J., Kesselmeier J., Genty G., Whelan M., Van Diest H., Launois T. & Wingate L. (2015) A new mechanistic framework to predict OCS fluxes from soils. American Geophysical Union (AGU) Fall Meeting, San Francisco, California, USA, 14th-18th December 2015.

Wingate L., Wehr R., Commane R., Ogée J. Sauze J., Jones S., Launois T., Wohl S., Whelan M., Meredith L., Genty B., Gimeno T., Kesselmeier J., Bosc A., Cuntz M., Munger B., Nelson D., Saleska S., Wofsy S. & Zahniser M. (2015) The impact of Carbonic Anhydrase on the partitioning of leaf and soil CO18O and COS gas exchange across scales. American Geophysical Union (AGU) Fall Meeting, San Francisco, California, USA, 14th-18th December 2015. (invited)

Wingate L. (2015) Investigating the impact of Carbonic Anhydrase on the atmospheric concentrations of CO18O and COS across scales. 8ème journée thématique de l’Observatoire Aquitain des Sciences de l’Univers, Bordeaux, France, 19th November 2015. (invited)

Ogée J., Wingate L., Bosc A. & Burlett R. (2015) Seasonal variations in soil carbonic anhydrase activity in a pine forest ecosystem as inferred from soil CO18O flux measurements. European Geophysical Union (EGU) Annual Meeting, Vienna, Austria, 13th-17th April 2015.

Sauze J., Ogée J., Launois T., Van Diest H., Kesselmeier J. & Wingate L. (2015) A new mechanistic framework to predict OCS fluxes in soils. European Geophysical Union (EGU) Annual Meeting, Vienna, Austria, 13th-17th April 2015.

Wingate L. (2014) Impact of microbial carbonic anhydrase on the atmospheric concentrations of CO18O and COS at large scales. Joint meeting of the British Ecological Society’s Plants, Soils, Ecosystems and Plant Environmental Physiology special interest groups: Carbon cycling: from plants to ecosystems, University of Manchester 16th-17th October 2014. (invited)

MSc and PhD theses