Dr Jason Everett
BEnvSc(Hons) PhD UNSW
School of Biological Earth and Environmental Science
University of New South Wales
Sydney NSW 2052
AUSTRALIA
Phone: +612 9385 2073
Fax: +612 9385 1558
Email: Jason.Everett at unsw.edu.au
Research Interests
- The size spectra of oceanic and estuarine plankton communities and its role as an indicator of trophic dynamics
- The role of salps in marine ecosystem function
- The biological oceanography of the East Australian Current, it's eddy field and associated coastal upwelling
- Ecological modelling of estuarine systems using biomechanical and scaling approaches
Current Projects
I am a postdoctoral researcher and split my time between the University of NSW and the University of Technology, Sydney. As a postdoctoral researcher in the FAMER laboratory
I am currently engaged in a range of projects including:
- The abundance and distribution of salps and their role in marine ecosystem function. Salps are the fastest growing metazoan (multi-celled) organism on the planet with growth rates approaching that of bacteria. They bloom in spring, dominating the planktonic biomass by many orders of magnitude. On recent research cruises aboard the RV Southern Surveyor off southeastern Australia (Spring 2006, 2008, 2009 and 2010), salps were often the dominant plankton collected. However, very little is known about their distribution, or how these blooms impact the marine ecosystem. To read more about salps, click here to go to our salp page.
- A census of Tasman Sea eddies, their distribution along the East Australian Coast, and their encroachment onto the shelf. Cyclonic (Cold-core) and Anti-Cylonic (Warm-Core) eddies are present across the entire surface of the ocean. Through the accumulation of almost 20 years of satellite altimetry data (Sea Surface Height), we are able to undertake a thorough census of the number, size and speed of large eddies in the Tasman Sea. We are particularly interested in those which are close to the Australian Coast as they offer opportunities for the entrainment of nutrients, plankton and fish from coastal enriched waters. Students within the FAMER lab are currently investigating whether there is an increase in growth and survival of larval fish when they are entrained into this enriched water.
- Spatial and temporal trends in Chlorophyll a and Net Primary Productivity (NPP) along the NSW Coast. Using satellite Ocean Colour data we are assessing the spatial and temporal trends in Chlorophyll a and NPP along the NSW continental shelf and slope. Regions of increased phytoplankton biomass are expected to support higher abundances of zooplankton and larval fish. This has significant implications for our coastal fisheries.
- Using estuarine zooplankton size distribution as an indicator of catchment disturbance. Disturbed catchments are known to export higher levels of nutrients an sediments to the estuary than undisturbed catchments. These nutrients flow through the food chain influencing plankton communities, and benthic processes, often with negative impacts. Using samples at multiple temporal and spatial scales across a range of NSW estuaries, we assess catchment impacts on the estuary using size-distribution of zooplankton, as measured by an Optical Plankton Counter.
Previously I worked for the Water and Coastal Science Section at the NSW Department of Climate Change (NSW DECC), helping to develop the Coastal Eutrophication Risk Assessment Tool (CERAT). The aim of CERAT is to permit comparative assessments of the risk of NSW estuaries to eutrophication and to assist in decisions on broad scale management actions.
Publications
2016
- Henschke, N., Everett, J.D., Richardson, A.J. and Suthers, I.M., (2016) Rethinking the Role of Salps in the Ocean. Trends in Ecology and Evolution
- Schaeffer, A., Roughan, M., Austin, T., Everett, J.D., Griffin, D., Hollings, B., King, E., Mantovanelli, A., Milburn, S., Pasquer, B., Pattiaratchi, C., Robertson, R., Stanley, D., Suthers, I.M. and White, D. (2016) Mean hydrography on the continental shelf from 26 repeat glider deployments along Southeastern Australia. Scientific Data
- Henschke, N., Everett, J.D. and Suthers, I.M., 2016. An observation of two oceanic salp swarms in the Tasman Sea: Thetys vagina and Cyclosalpa affinis . Marine Biodiversity Records , 9(1),
- Doblin, M.A., Petrou, K., Sinutok, S., Seymour, J.R., Messer, L.F., Brown, M.V., Norman, L., Everett, J.D., McInnes, A.S., Ralph, P.J. and Thompson, P.A., 2016. Nutrient uplift in a cyclonic eddy increases diversity, primary productivity and iron demand of microbial communities relative to a western boundary current. PeerJ , 4, p.e1973.
- Carroll, G., Everett, J.D., Harcourt, R., Slip, D., Jonsen, I. (2016). High sea surface temperatures driven by a strengthening current reduce foraging success by penguins. Scientific Reports 6: 22236
2015 and earlier
- Brodie, S., Hobday, A. J., Smith, J. A., Everett, J. D., Taylor, M. D., Gray, C. A., Suthers, I. M. (2015). Modelling the oceanic habitats of two pelagic species using recreational fisheries data. Fisheries Oceanography 24(5), 463-477
- Henschke, N., Everett, J. D., Suthers, I. M., Smith, J. A., Hunt, B. P., Doblin, M. A., Taylor, M. D. (2015). Zooplankton trophic niches respond to different water types of the western Tasman Sea: A stable isotope analysis. Deep Sea Research Part I: Oceanographic Research Papers 104, 1-8
- Henschke, N., Smith, J.A., Everett, J.D., Suthers, I.M. (2015) Population drivers of a Thalia democratica swarm: insights from population modelling. Journal of Plankton Research in press
- Everett, Jason D.; Doblin, Martina A.(2015) Characterising primary productivity measurements across a dynamic western boundary current region. Deep-Sea Research Part I-Oceanographic Research Papers 100 105-116 DOI: 10.1016/j.dsr.2015.02.010
- Everett, J. D.; Macdonald, H.; Baird, M. E.; Humphries, J.; Roughan, M.; Suthers, I.M, (2015) Cyclonic entrainment of preconditioned shelf waters into a frontal eddy Journal of Geophysical Research-Oceans 120(2) 677-691. DOI: 10.1002/2014JC010301
- Henschke, N., Everett, J.D., Doblin, M.A., Pitt, K.A., Richardson, A.J. and Suthers, I.M. (2014) Demography and interannual variability of salp swarms (Thalia democratica). Marine Biology, 161, 149–163.
- Everett, J D and Baird, M E and Roughan, M and Suthers, I M (2014) Relative impact of seasonal and oceanographic drivers on surface chlorophyll a along a Western Boundary Current. Progress in Oceanography 120 340-351
- Henschke, N.; Bowden, D. A.; Everett, J. D., Holmes, S.P., Kloser, R. J. Kloser, Lee, R.L., Suthers, I.M. (2013) Salp-falls in the Tasman Sea: a major food input to deep-sea benthos Marine Ecology Progress Series 491 165-175. DOI: 10.3354/meps10450
- Everett, J. D., M. E. Baird, P. R. Oke, and I. M. Suthers (2012), An Avenue of Eddies: Quantifying the biophysical properties of mesoscale eddies in the Tasman Sea, Geophysical Research Letters, 39, L16608 doi:10.1029/2012GL053091
- Everett, J.D., Baird, M.E., Suthers, I.M., 2011. Three-dimensional structure of a swarm of the salp Thalia democratica within a cold-core eddy off southeast Australia.Journal of Geophysical Research 116: C12046. doi:10.1029/2011JC007310
- Henschke, N., Everett, J.D., Baird, M.E., Taylor, M.D., Suthers, I.M. (2011) Distribution and life history stages of the salp Thalia democratica in relation to water masses of the western Tasman Sea. Marine Ecology Progress Series 430 49-62
- Baird, M.E., Everett, J.D., Suthers, I.M., (2011) Analysis of southeast Australian zooplankton observations of 1938-42 using synoptic oceanographic conditions. Deep Sea Research II 58(5) 699-711
- Hassler, C.S., Djajadikarta, J.R., Doblin, M.A., Everett, J.D., Thompson, P.A. (2011) Characterisation of water masses and phytoplankton nutrient limitation in the East Australian Current separation zone during Spring 2008. Deep Sea Research II 58(5) 664-677
- Baird, M.E., Suthers, I.M., Griffin, D.A., Hollings, B., Pattiaratchi, C., Everett, J.D., Roughan, M., Oubelkheir, K., Doblin, M.A. (2011) The effect of surface flooding on the physical-biogeochemical dynamics of a warm core eddy off southeast Australia. Deep Sea Research II 58(5) 592-605
- Suthers, I.M., Everett, J.D., Roughan, M., Young, J.W., Oke, P.R., Condie, S.A., Hartog, J.R., et al. (2011). The strengthening East Australian Current, its eddies and biological effects - an introduction and overview. Deep-Sea Research Part II-Topical Studies in Oceanography 58 :538-546
- Everett, J.D., Baird, M.E., Suthers, I.M., 2007. Nutrient and plankton dynamics in an intermittently closed/open lagoon, Smiths Lake, south-eastern Australia: An ecological model. Estuarine, Coastal and Shelf Science 72: 690–702.
For a full list of lab publications, please see the FAMER publications page.
Students
Natasha Henschke - Size distribution and abundance of salps in the Tasman Sea
Professional Societies
- Member of Australian Marine Sciences Association (AMSA) (2002-present)
- Book Review Editor and Council Member of Australian Marine Sciences Association (AMSA) (2011-2013)
- Member of Association for the Sciences of Limnology and Oceanography (ASLO) (2008-present)
- Member of American Geophysical Union (AGU) (2008-present)
