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About Professor Bradley D Eyre

Professor Bradley D Eyre BSc(Hons)(Adel) PhD(QUT)
My initial work used simple mixing models, including the development of modified mixing models, to improve our understanding of the way nutrients are cycled in tropical and sub-tropical systems. The role of physical forcing events (i.e. floods) was emphasised in this early work (see Eyre, 2000). I then began focusing, in conjunction with my colleague Angus Ferguson, on the benthic metabolism of tropical and sub-tropical estuarine and coastal ecosystems. In particular, benthic carbon production and remineralisation and its link to nitrogen cycling processes such as benthic fluxes of inorganic and organic nitrogen, denitrification and N-fixation, and also the flow of carbon and nitrogen through lower food webs. I use a modified Membrane Inlet Mass Spectrometer (see Eyre et al., 2002) that allows us to measure direct 28N2 gas fluxes as well as 29N2 and 30N2 production following 15N additions allowing us to get simultaneous measurements of denitrification, N-fixation and net 28N2 gas fluxes. I received the 1999 Cronin Award by the Estuarine Research Federation (ERF) for my work on estuarine biogeochemistry.
Whole Ecosystem Scale C. N and P Budgets
I always had an interest in mass balance budgets as I see them as a way of constraining what we know, and what we do not know, about whole ecosystem scale flows of carbon, nitrogen and phosphorus. Budgets also provide a means of quantitatively comparing different coastal ecosystems. However, rarely do we have sufficient data sets available to construct these type of budgets (see Eyre and Mckee, 2002). Much of my estuarine coastal biogeochemical work is being undertaken in the context of providing information to fill data gaps in sub-tropical and tropical C, N and P budgets. And I will always go back to the budget framework when I have sufficient data sets. I have also been involved in LOICZ C, N, and P budgeting exercise having developed a number of budgets for Australian systems.
Comparison of Tropical and Temperate Systems
A common theme through much of my work is the comparison of tropical and temperate systems. I am interested in identifying the factors that modify the response of estuarine and coastal ecosystems from different climate zone to nutrient over-enrichment, in particular the role of benthic-pelagic coupling.


2016 - Present Professor, Southern Cross University School of Environment, Science and Engineering
Present Director, Southern Cross University Centre for Coastal Biogeochemistry Research

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Contact Information

PO Box 157
Lismore NSW
Australia 2480

Phone: (+61 2) 6620 3773
Fax: (+61 2) 6621 2669


Journal articles (159)