Dr Jackie Webb

Dr Jackie Webb
NameDr Jackie Webb
Email Addressjackie.webb@unisq.edu.au
Job TitleLecturer (Environmental Science)
QualificationsBEnvSc Southern Cross, PhD Southern Cross
DepartmentSchool of Agriculture and Environmental Science
AffiliationsCentre for Sustainable Agricultural Systems
ORCIDhttps://orcid.org/0000-0003-1274-363X
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Biography

Jackie Webb is an environmental scientist specializing in issues relating to water quality of aquatic systems in agricultural landscapes. Her particular expertise resides in ecosystem biogeochemistry, with a focus on hydrological monitoring, carbon and greenhouse gas accounting, and development of quantitative models to solve environmental issues. Previous positions include working as a casual academic within the School of Agricultural and Wine Sciences at Charles Sturt University and as a postdoctoral researcher working on the carbon and GHG balance of agricultural dams at the University of Regina in Saskatchewan, Canada. Jackie completed her PhD at Southern Cross University in Australia where she studied carbon cycling in agricultural floodplains. Her main research focus has included integrating carbon cycles between terrestrial and aquatic systems, carbon dioxide and methane biogeochemistry in fresh to coastal waters, hydrology and groundwater tracing, greenhouse gas fluxes, and stable isotopes. From 2020-2024, Jackie worked as a research fellow at Deakin University Centre for Regional and Rural Futures, conducting applied research on soil health, crop nutrient cycling, and the carbon footprint of water infrastructure in irrigated farming systems. Since 2024, Jackie embarked on a new journey at the University of Southern Queensland as a Lecturer in Environmental Science.

Teaching

Conservation for Sustainable Futures (REN2606)

Environmental Studies (REN1201)

Introduction to Water Science (WAT1101)

Fields of Research

  • 300201. Agricultural hydrology
  • 300204. Agricultural management of nutrients
  • 370203. Greenhouse gas inventories and fluxes
  • 370703. Groundwater hydrology
  • 370704. Surface water hydrology
  • 410501. Environmental biogeochemistry
  • 410504. Surface water quality processes and contaminated sediment assessment
BEnvSc
Southern Cross
2014
PhD
Southern Cross
2017
DateNameAwarding organisationUnderpinning research
2023Board of ReviewersBiogeochemistry
2023Emerging National Rural Issues workshop on Carbon Neutral AgricultureAgriFutures Australia

Whole system carbon cycling during the growing season of a sugarcane crop in the tweed valley

Webb, JR, Quirk, RG, Santos, I.R, Maher, DT, Macdonald, BCT, Robson, B, Isaac, P and McHugh, I. 2017. "Whole system carbon cycling during the growing season of a sugarcane crop in the tweed valley." 39th Annual Conference of the Australian Society of Sugar Cane Technologists (ASSCT 2017). Cairns, Australia 03 - 05 May 2017 Australia.

Soil greenhouse gas emissions under enhanced efficiency and urea nitrogen fertilizer from Australian irrigated aerobic rice production

Webb, Jackie R., Champness, Matt, Hornbuckle, John and Quayle, Wendy C.. 2024. "Soil greenhouse gas emissions under enhanced efficiency and urea nitrogen fertilizer from Australian irrigated aerobic rice production." Agrosystems, Geosciences & Environment. 7 (4). https://doi.org/10.1002/agg2.70004

Terrestrial versus aquatic carbon fluxes in a subtropical agricultural floodplain over an annual cycle

Webb, Jackie R., Santos, Isaac R., Maher, Damien T., Macdonald, Ben, Robson, Barbara, Isaac, Peter and McHugh, Ian. 2018. "Terrestrial versus aquatic carbon fluxes in a subtropical agricultural floodplain over an annual cycle." Agricultural and Forest Meteorology. 260-261, pp. 262-272. https://doi.org/10.1016/j.agrformet.2018.06.015

Semi-arid irrigation farm dams are a small source of greenhouse gas emissions

Webb, Jackie R., Quayle, Wendy C., Ballester, Carlos and Wells, Naomi S.. 2023. "Semi-arid irrigation farm dams are a small source of greenhouse gas emissions." Biogeochemistry: an international journal. 166 (2), pp. 123-138. https://doi.org/10.1007/s10533-023-01100-4

Differential Controls of Greenhouse Gas (CO2, CH4, and N2O) Concentrations in Natural and Constructed Agricultural Waterbodies on the Northern Great Plains

Jensen, Sydney A., Webb, Jackie R., Simpson, Gavin L., Baulch, Helen M., Leavitt, Peter R. and Finlay, Kerri. 2023. "Differential Controls of Greenhouse Gas (CO2, CH4, and N2O) Concentrations in Natural and Constructed Agricultural Waterbodies on the Northern Great Plains." Journal of Geophysical Research: Biogeosciences. 128 (4). https://doi.org/10.1029/2022JG007261

Integrating terrestrial and aquatic ecosystems to constrain estimates of land-atmosphere carbon exchange

Casas-Ruiz, Joan P., Bodmer, Pascal, Bona, Kelly Ann, Butman, David, Couturier, Mathilde, Emilson, Erik J. S., Finlay, Kerri, Genet, Hélène, Hayes, Daniel, Karlsson, Jan, Paré, David, Peng, Changhui, Striegl, Rob, Webb, Jackie, Wei, Xinyuan, Ziegler, Susan E. and del Giorgio, Paul A.. 2023. "Integrating terrestrial and aquatic ecosystems to constrain estimates of land-atmosphere carbon exchange." Nature Communications. 14 (1). https://doi.org/10.1038/s41467-023-37232-2

Methane and nitrous oxide emissions complicate the climate benefits of teal and blue carbon wetlands

Malerba, Martino E., Friess, Daniel A., Peacock, Mike, Grinham, Alistair, Taillardat, Pierre, Rosentreter, Judith A., Webb, Jackie, Iram, Naima, Al-Haj, Alia N. and Macreadie, Peter I.. 2022. "Methane and nitrous oxide emissions complicate the climate benefits of teal and blue carbon wetlands." One Earth. 5 (12), pp. 1336-1341. https://doi.org/10.1016/j.oneear.2022.11.003

Poultry litter increased irrigated cotton N uptake with limited improvement on 15N-labelled urea recovery over one season

Webb, Jackie R., Awale, Rakesh and Quayle, Wendy C.. 2023. "Poultry litter increased irrigated cotton N uptake with limited improvement on 15N-labelled urea recovery over one season." Nutrient Cycling in Agroecosystems. 125 (2), pp. 137-152. https://doi.org/10.1007/s10705-022-10251-z

Seasonal variability of CO2, CH4, and N2O content and fluxes in small agricultural reservoirs of the northern Great Plains

Jensen, Sydney A., Webb, Jackie R., Simpson, Gavin L., Baulch, Helen M., Leavitt, Peter R. and Finlay, Kerri. 2022. "Seasonal variability of CO2, CH4, and N2O content and fluxes in small agricultural reservoirs of the northern Great Plains." Frontiers in Environmental Science. 10. https://doi.org/10.3389/fenvs.2022.895531

Classifying Mixing Regimes in Ponds and Shallow Lakes

Holgerson, Meredith A, Richardson, David C., Roith, Joseph, Bortolotti, Lauren E., Finlay, Kerri, Hornbach, Daniel J., Gurung, Kshitij, Ness, Andrew, Andersen, Mikkel R., Bansal, Sheel, Finlay, Jacques C., Cianci-Gaskill, Jacob A., Hahn, Shannon, Janke, Benjamin D., McDonald, Cory, Mesman, Jorrit P., North, Rebecca L., Robert, Cassandra O., Sweetman, J.N. and Webb, Jackie R.. 2022. "Classifying Mixing Regimes in Ponds and Shallow Lakes." Water Resources Research. 58 (7). https://doi.org/10.1029/2022WR032522

A review of indirect N2O emission factors from artificial agricultural waters

Webb, Jackie R, Clough, Tim J and Quayle, Wendy C. 2021. "A review of indirect N2O emission factors from artificial agricultural waters." Environmental Research Letters. 16 (4). https://doi.org/10.1088/1748-9326/abed00

Altered groundwater discharge and associated carbon fluxes in a wetland-drained coastal canal

Davis, Kay, Santos, Isaac R., Perkins, Anita K., Webb, Jackie R. and Gleeson, Justin. 2020. "Altered groundwater discharge and associated carbon fluxes in a wetland-drained coastal canal." Estuarine, Coastal and Shelf Science. 235. https://doi.org/10.1016/j.ecss.2019.106567

Regulation of carbon dioxide and methane in small agricultural reservoirs: Optimizing potential for greenhouse gas uptake

Webb, Jackie R., Leavitt, Peter R., Simpson, Gavin L., Baulch, Helen M., Haig, Heather A., Hodder, Kyle R. and Finlay, Kerri. 2019. "Regulation of carbon dioxide and methane in small agricultural reservoirs: Optimizing potential for greenhouse gas uptake." Biogeosciences. 16 (21), pp. 4211-4227. https://doi.org/10.5194/bg-16-4211-2019

Widespread nitrous oxide undersaturation in farm waterbodies creates an unexpected greenhouse gas sink

Webb, Jackie R., Hayes, Nicole M., Simpson, Gavin L., Leavitt, Peter R., Baulch, Helen M. and Finlay, Kerri. 2019. "Widespread nitrous oxide undersaturation in farm waterbodies creates an unexpected greenhouse gas sink." Proceedings of the National Academy of Sciences (PNAS). 116 (20), pp. 9814-9819. https://doi.org/10.1073/pnas.1820389116

The Importance of Aquatic Carbon Fluxes in Net Ecosystem Carbon Budgets: A Catchment-Scale Review

Webb, Jackie R., Santos, Isaac R., Maher, Damien T. and Finlay, Kerri. 2019. "The Importance of Aquatic Carbon Fluxes in Net Ecosystem Carbon Budgets: A Catchment-Scale Review." Ecosystems. 22 (3), pp. 508-527. https://doi.org/10.1007/s10021-018-0284-7

Hydrological Versus Biological Drivers of Nutrient and Carbon Dioxide Dynamics in a Coastal Lagoon

Maher, Damien T., Call, Mitchell, Macklin, Paul, Webb, Jackie R. and Santos, Isaac R.. 2019. "Hydrological Versus Biological Drivers of Nutrient and Carbon Dioxide Dynamics in a Coastal Lagoon." Estuaries and Coasts. 42 (4), pp. 1015-1031. https://doi.org/10.1007/s12237-019-00532-2

Dissolved carbon, greenhouse gases, and δ13C dynamics in four estuaries across a land use gradient

Looman, Arun, Santos, Isaac R., Tait, Douglas R., Webb, Jackie, Holloway, Ceylena and Maher, Damien T.. 2019. "Dissolved carbon, greenhouse gases, and δ13C dynamics in four estuaries across a land use gradient." Aquatic Sciences: research across boundaries. 81 (1). https://doi.org/10.1007/s00027-018-0617-9

Carbon outwelling and outgassing vs. burial in an estuarine tidal creek surrounded by mangrove and saltmarsh wetlands

Santos, Isaac R., Maher, Damien T., Larkin, Reece, Webb, Jackie R. and Sanders, Christian J.. 2019. "Carbon outwelling and outgassing vs. burial in an estuarine tidal creek surrounded by mangrove and saltmarsh wetlands." Limnology and Oceanography. 64 (3), pp. 996-1013. https://doi.org/10.1002/lno.11090

Groundwater as a source of dissolved organic matter to coastal waters: Insights from radon and CDOM observations in 12 shallow coastal systems

Webb, Jackie R., Santos, Isaac R., Maher, Damien T, Tait, Douglas R., Cyronak, Tyler, Sadat-Noori, Mahmood, Macklin, Paul and Jeffrey, Luke C.. 2019. "Groundwater as a source of dissolved organic matter to coastal waters: Insights from radon and CDOM observations in 12 shallow coastal systems." Limnology and Oceanography. 64 (1), pp. 182-196. https://doi.org/10.1002/lno.11028

Constraining the annual groundwater contribution to the water balance of an agricultural floodplain using radon: The importance of floods

Webb, Jackie R., Santos, Isaac R., Robson, Barbara, Macdonald, Ben, Jeffrey, Luke and Maher, d Damien T.. 2017. "Constraining the annual groundwater contribution to the water balance of an agricultural floodplain using radon: The importance of floods." Water Resources Research. 53 (1), pp. 544-562. https://doi.org/10.1002/2016WR019735

Divergent drivers of carbon dioxide and methane dynamics in an agricultural coastal floodplain: Post-flood hydrological and biological drivers

Webb, Jackie R., Santos, Isaac R., Tait, Douglas R., Sippo, James Z., Macdonald, Ben C. T., Robson, Barbara and Maher, Damien T.. 2016. "Divergent drivers of carbon dioxide and methane dynamics in an agricultural coastal floodplain: Post-flood hydrological and biological drivers." Chemical Geology. 440, pp. 313-325. https://doi.org/10.1016/j.chemgeo.2016.07.025

Carbon cycling and exports over diel and flood-recovery timescales in a subtropical rainforest headwater stream

Looman, Arún, Santos, Isaac R., Tait, Douglas R., Webb, Jackie R., Sullivan, Caroline A. and Maher, Damien T.. 2016. "Carbon cycling and exports over diel and flood-recovery timescales in a subtropical rainforest headwater stream." Science of the Total Environment. 550, pp. 645-657. https://doi.org/10.1016/j.scitotenv.2016.01.082

Automated, in situ measurements of dissolved CO2, CH4, and δ13C values using cavity enhanced laser absorption spectrometry: Comparing response times of air-water equilibrators

Webb, Jackie R., Maher, Damien T. and Santos, Isaac R.. 2016. "Automated, in situ measurements of dissolved CO2, CH4, and δ13C values using cavity enhanced laser absorption spectrometry: Comparing response times of air-water equilibrators." Limnology and Oceanography: Methods. 14 (5), pp. 323-337. https://doi.org/10.1002/lom3.10092

Applying cavity ring-down spectroscopy for the measurement of dissolved nitrous oxide concentrations and bulk nitrogen isotopic composition in aquatic systems: Correcting for interferences and field application

Erler, D. V., Duncan, T. M., Murray, R., Maher, D. T., Santos, I. R., Gatland, J. R., Mangion, P. and Eyre, B. D.. 2015. "Applying cavity ring-down spectroscopy for the measurement of dissolved nitrous oxide concentrations and bulk nitrogen isotopic composition in aquatic systems: Correcting for interferences and field application." Limnology and Oceanography: Methods. 13 (8), pp. 391-401. https://doi.org/10.1002/lom3.10032

Groundwater seepage as a driver of CO2 evasion in a coastal lake (Lake Ainsworth, NSW, Australia)

Perkins, Anita K., Santos, Isaac R., Sadat-Noori, Mahmood, Gatland, Jackie R. and Maher, Damien T.. 2015. "Groundwater seepage as a driver of CO2 evasion in a coastal lake (Lake Ainsworth, NSW, Australia)." Environmental Earth Sciences. 74 (1), pp. 779-792. https://doi.org/10.1007/s12665-015-4082-7

Carbon dioxide and methane emissions from an artificially drained coastal wetland during a flood: Implications for wetland global warming potential

Gatland, J.R., Santos, I. R., Maher, D. T., Duncan, T. M. and Erler, D. V.. 2014. "Carbon dioxide and methane emissions from an artificially drained coastal wetland during a flood: Implications for wetland global warming potential." Journal of Geophysical Research: Biogeosciences. 119 (8), pp. 1698-1716. https://doi.org/10.1002/2013JG002544