Professor Bradley Eyre

Research Interests

Professor Bradley Eyre

My research focuses on the flow of carbon and nitrogen through the earth-system, and changes in these flows due to global change (e.g. climate change, ocean acidification, and eutrophication (excess organic matter production e.g. algae)).

I am currently focusing on two global biogeochemical grand challenges (1) the role shallow water carbonate sediment dissolution in the global carbon budget, and (2) the role of aquatic greenhouse gas emissions in global carbon and nitrogen cycles.

I work in estuaries, rivers and catchments, near-shore coastal areas, mangroves, seagrasses salt-marshes, and coral reefs. I use a variety of research approaches in my work, on scales from a few meters to global estimates, including in-situ process measurements, natural abundance, tracer and compound specific stable isotopes measurements, automated instrumentation, experimental manipulations, ecosystem comparisons, ecosystem stimulation modeling and material mass-balances. Much of my work has been in (sub) tropical coastal systems, but I have also worked in warm and cold temperate and arctic systems.

My publications include topics such as whole ecosystem carbon, nitrogen and phosphorus budgets, net ecosystem metabolism estimates, benthic and pelagic production and respiration, dissolved organic carbon fluxes, carbon stable isotopes (fluxes and assimilation), carbon burial and air-sea CO2, CH4 and N2O (GHG) flux estimates, benthic denitrification, benthic habitats and seascapes, historical and ecosystem comparisons, ocean acidification, hypoxia, eutrophication, submarine groundwater discharge, permeable sands, carbonate sand dissolution and coral reef biogeochemistry. 

Publications in Nature and Science Journals

Rosentreter, J. A., A. V. Borges, P. A. Raymond, B. R. Deemer, M. A. Holgerson, C. M. Duarte, S. Liu, C. Song, G. H. Allen, J. Melack, B. Poulter, D. Olefeldt, T. I. Battin and B. D. Eyre. 2021. Half of global methane emissions come from highly variable aquatic ecosystem sources. Nature Geoscience 14, 225–230.

Hanqin, T….B. D. Eyre…(56 authors) 2020. A comprehensive quantification of global nitrous oxide sources and sinks. Nature 586, 248-256.

Saderne, V., … B. D. Eyre, … 2019. Role of carbonate burial in “Blue Carbon” ecosystems budgets. Nature Communications 10, 1106.

Serrano, O., … B. D. Eyre, … 2019. Australian vegetated coastal ecosystems as global hotspots for climate change mitigation. Nature Communications 10, 4313.

Macreadie, P. I., … B. D. Eyre, … 2019. The future of blue carbon science. Nature Communications 10, 3998.

Eyre, B. D., T. Cyronak, P. Drupp, E. De Carlo, J. P. Sachs and A. J. Andersson. 2018. Coral reefs will transition to net dissolving before end of century. Science 359, 908-911.

Rosentreter, J. A., D. T. Maher, D. V. Erler, R. Murray, and B. D. Eyre. 2018. CH4 emissions partially offset ‘blue carbon’ burial in mangroves. Science Advances 4, eaao4985.

Eyre, B. D., Andersson, A. J. and Cyronak, T. 2014. Benthic coral reef calcium carbonate dissolution in an acidifying ocean. Nature Climate Change 4, 969-976.  

All Publications


Major Research Grants

Australian Research Council (ARC) Grants (Total = 30 Grants) ($9,515,850 ARC)($4,058,309 associated cash)

ARC Discovery (Total = 8 Grants) ($2,125,813) (all as Lead CI)

- $305,000 (DP160100248) Seagrass denitrification: importance for global nitrogen budgets, 2016-2018. Lead CI.

- $350,000 (DP150102092) Dissolution of CaCO3 in sediments in an acidifying ocean, 2015-2017. Lead CI.

- $310,000 (DP110103638) 'Unravelling the synergistic effect of ocean acidification and pore water advection on carbonate sediment dissolution: a global sink for CO2 2011-2013. Lead CI.

- $340,000 (DP0878683) 'Unravelling the pathways of nitrogen cycling in permeable sandy sediments in tropical coastal systems' 2008 to 2010. Lead CI.

- $320,000 (DP0878568) 'Unravelling pathways of nitrogen cycling in the muddy sediments of shallow coastal systems using biomarkers, stable isotope tracer experiments and modelling' 2008 to 2010. Lead CI.

- $72,000 (DP0663159) 'A pilot study to demonstrate the use of 15N tracers for determining the flow of nitrogen through lower food webs' 2006 to 2007. Lead CI.

- $203,000 (DP0342956) 'Resolving uncertainty over the importance of N-fixation versus denitrification in coastal systems' 2003 to 2005. Lead CI.

- $150,000 (A00000938) 'Sediment denitrification in sub-tropical Australian estuaries: an evaluation of the controlling environmental factors' 1999 to 2001. Lead CI.

ARC Linkage (Total = 11 Grants)($4,363,037 ARC)($1,638395 Industry Cash) (Eight as Lead CI)

- $779,711 (LP200200910)- Unravelling how aquatic biogeochemical networks regulate nitrogen removal.2021-2024. Lead CI.

- $475,000 (LP190100271) Untangling metabolism and greenhouse gas production in intermittent streams. 2020 to 2023. Lead CI.

- $900,000 (LP150100519) Unravelling the drivers of greenhouse gas emissions in estuaries. 2015 to 2018. Lead CI.

- $947,821 (LP150100451) Balancing estuarine and societal health in a changing environment. 2015 to 2018. CI3 of 6.

- $546,670 (LP110200975) Unravelling the cycling of nitrogen along a subtropical freshwater-marine continuum using a multi-isotope, multi-tracer and modelling approach 2011 to 2014. Lead CI.

- $607,000 (LP100200732) 'Resolving nitrogen and phosphorus transformations along subterranean estuary-sediment/water interface continuums in carbonate sands' 2010 to 2013. Lead CI.

- $303,395 (LP0991254) 'Unravelling the nitrogen cycle in a periodically anoxic estuary' 2009 to 2012. CI 2 of 3.

- $866,000 (LP0770222) 'Anthropogenic influences on the source, transformation and fate of carbon and nitrogen in coastal waters: a case study of the Derwent Estuary' 2007 to 2010. CI 3 of 4.

- $351,000 (LP0667449) 'Unravelling Pathways of Nitrogen Cycling Pathways in Constructed Wetlands Treatment Systems Stable Isotope Tracer, Biomarkers and Mass Balance Modelling' 2006 to 2008. Lead CI.

- $99,000 (LP0347801) 'The importance of sediment denitrification in the nitrogen budget of the inshore wet tropics section of the Great Barrier Reef' 2003 to 2005. Lead CI.

- $350,000 (LP0212075) 'The Impact of Trawling on Nitrogen Removal through Sediment Denitrification in Western Moreton Bay' 2002 to 2004. Lead CI.

ARC LIEF (Total = 11 Grants) ($2,847,000) ($2,419,914 Uni cash)(Six as Lead CI)

- $884,914 (LE200100155) An equilibrium Inlet-Proton Transfer Reaction-Mass Spectrometer. 2020. Lead CI.

- $896, 000 (LE200100156) A facility for quantification and isotopic analysis of trace gases. 2020. CI 2.

- $170,000 (ARC) (LE150100007) Metal speciation for complex studies in changing environments, 2015. CI3 of 5.

- $150,000 (ARC) (LE140100083) - "A gamma spectrometry facility for cutting edge environmental geochemistry investigations" 2014. CI 2 of 5.

- $240,000 (ARC) (LE130100153) "A liquid chromatography/ gas bench: isotope ratio mass spectrometer for new and novel carbon and nitrogen research in coastal systems" 2013. Lead CI.

- $250,000 (ARC) (LIEF LE120100156) A high precision, automated system for studying greenhouse gas cycling in coastal environments. 2012. CI 2 of 5.

- $170,000 (ARC) (LE100100013) 'Eddy Correlation Lander Array' 2010. Lead CI.

- $220,000 (ARC) (LE0989952) 'A Wet Chemical Oxidation-Isotope Ratio Mass Spectrometer (WCO-IRMS)' 2009. Lead CI.

- $322,000 (ARC) (LE0668478) 'A laboratory information system to underpin laboratory research at Southern Cross University' 2006.

- $272,000 (ARC) (LE0668495) 'A Gas Chromatograph-Combustion/Elemental Analyser-Isotope Ratio Mass Spectrometer (GC-c/EA-IRMS) system for Environmental Research' 2006. Lead CI.

- $180,000 (ARC) 'MIMS & ECGC for rapid determination of denitrification and N2-fixation rates in Australian coastal ecosystems' 1998. Lead CI.

Other Category 1 Grants

- $9300 AINSE Grant no. ALNGRA14015 Are mangrove carbon exports, old or modern? A C-14 analysis of particulate organic carbon (POC), dissolved organic carbon (DOC), and dissolved inorganic carbon (DIC)

- $3,000,000 CSIRO Carbon Biogeochemistry Cluster. 2012-2015. SCU Project Leader.

- $225,000 Improving environmental and human health in the Pacific Islands through better onsite wastewater management. Australian Research Development Award (AUSAID). 2008. Project Leader.

- $84,410 'Are groundwater inputs driving de-oxygenation, acidification and eutrophication. 'Herman Slade Foundation. 2009 to 2012. CI 2 of 3.


- $1,975,863 An atmospheric survey of aerosol cloud microphysical interactions over the Great Barrier Reef. Reef Restoration and Adaptation Program. CI2 of 9.

- $120,000 Research Attraction and Acceleration Program/ High Performance Soils CRC

- $300,000. "A carbon budget for the Great Barrier Reef". Great Barrier Reef Foundation. 2013/2014. Co-Lead CI.

- $400,000. "Increasing carbonate chemistry data for the Great Barrier Reef".2013/2014 to 2014/2015. Co-Lead CI.

- $270,000 "Extension- Increasing carbonate chemistry data for the Great Barrier Reef". 2014/2015 to 2016/2017. Co-Lead CI.

- $18,080. "Is groundwater discharge a major source of nutrients and eutrophication to Brisbane Water?" - Gosford City Council. 2012-2014. CI 2 of 3.

- $198,000 'Causes of de-oxygenation in the Richmond River Estuary' Environmental Trust. 2002 to 2004. Project Leader.

- $74,132 'Nutrient behaviour in eight northern NSW estuaries' Environmental Trust. 1996 to 1997. Project Leader.

Contract Research

Total Projects: $2.84 million (full list available upon request).