Dr Ezequiel "Ziggy" MARZINELLI
Senior Research Fellow
Centre for Marine Bio-Innovation, University of New South Wales

I am a quantitative ecologist with a strong background in experimental design. My primary research goal is to understand how ecological processes and environmental changes influence interactions between microbes and their hosts, particularly habitat-forming species, and how disruptions to these interactions affect associated biodiversity. I combine large-scale surveys with experiments to gain mechanistic understanding of the causes and consequences of species’ declines, and to provide sensible, practical solutions to restore degraded habitats. I regularly teach courses on experimental design and statistics.

Scholarly book chapters

  1. Bigatti G, Marzinelli EM, Cledón M & Penchaszadeh PE (2004) Gonadic cycle of Pseudechinus magellanicus (Philippi, 1857) (Echinoidea: Temnopleuridae) from Patagonia, Argentina. In: Heinzeller T & Nebelsick J (eds) Echinoderms: München. Taylor & Francis Group, London, UK, p. 11-14


Refereed journal articles [# = joint first author]

  1. Vergés A, Doropoulos C, Malcolm HA, Skye M, Garcia-Pizá M, Marzinelli EM, Campbell AH, Ballesteros E, Hoey AS, Vila-Concejo A, Bozec YM & Steinberg PD (2016) Long-term empirical evidence of ocean warming leading to tropicalization of fish communities, increased herbivory and loss of kelp. PNAS In press (accepted 20/10/16)
  2. Guest JR, Tun K, Low J, Vergés A, Marzinelli EM, Campbell AH, Bauman AG, Feary DA, Chou LM & Steinberg PD (2016) 27 years of benthic and coral community dynamics on turbid, highly urbanised reefs off Singapore. Scientific Reports In press (accepted 13/10/16)
  3. Fogwill CG, van Sebille E, Cougnon EA, Turney CSM, Rintoul SR, Clark GF, Marzinelli EM, Rainsley EB & Carter L. (2016) Impacts of a developing polynya off Commonwealth Bay, East Antarctica, triggered by grounding of iceberg B09B. The Cryosphere 10: 2603-2609
  4. Bugnot AB, Coleman RA, Figueira WF & Marzinelli EM (2016) Effects of the receiving assemblage and disturbance on the colonisation of an invasive species. Marine Biology In press (accepted 31/05/2016)
  5. Marzinelli EM, Leong MR#, Campbell AH, Steinberg PD & Vergés A (2015) Does restoration of a habitat-forming seaweed restore associated faunal diversity? Restoration Ecology (published online 26/10/2015; DOI 10.1111/rec.12292)
  6. Mayer-Pinto M, Johnston EL, Hutchings PA, Marzinelli EM, Ahyong S, Birch GF, Booth DJ, Creese RG, Doblin MA, Figueira WF, Gribben PE, Pritchard TR, Roughan M, Steinberg PD & Hedge LH (2015) Sydney Harbour: A review of anthropogenic impacts on the biodiversity and ecosystem function of the world’s largest urbanised estuary. Marine and Freshwater Research 66: 1088-1105
  7. Johnston EL, Mayer-Pinto M, Hutchings P, Marzinelli EM, Ahyong S, Birch GF, Booth DJ, Creese RG, Doblin MA, Figueira WF, Gribben PE, Pritchard TR, Roughan M, Steinberg PD & Hedge LH (2015) Sydney Harbour: What we do and don’t know about a mega-diverse estuary. Marine and Freshwater Research 66: 1073-1087
  8. Basford AJ, Feary DA, Truong G, Steinberg PD, Marzinelli EM & Vergés A (2015) Feeding habits of range-shifting herbivores: tropical surgeonfishes in a temperate environment. Marine and Freshwater Research In press (published online 6/7/2015; DOI 10.1071/MF14208)
  9. Marzinelli EM, Campbell AH#, Zozaya Valdes E, Vergés A, Nielsen S, Wernberg T, de Bettignes T, Bennett S, Caporaso JG, Thomas T & Steinberg PD (2015) Continental-scale variation in seaweed host-associated bacterial communities is a function of host condition, not geography. Environmental Microbiology 17:4078-4088
  10. Marzinelli EM, Williams SB, Babcock RC, Barrett NS, Johnson CR, Jordan A, Kendrick GA, Pizarro OR, Smale DA & Steinberg PD (2015) Large-scale geographic variation in distribution and abundance of Australian deep-water kelp forests. PLOS ONE 10:e0118390
  11. Campbell AH, Marzinelli EM#, Gelber J & Steinberg PD (2015) Spatial variability of microbial assemblages associated with a dominant habitat-forming seaweed. Frontiers in Microbiology 6:230
  12. Wahl M, Molis M, Hobday AJ, Dudgeon S, Neumann R, Steinberg PD, Campbell AH, Marzinelli EM & Connell SD (2015) The responses of brown macroalgae to environmental change from local to global scales: direct versus ecologically mediated effects. Perspectives in Phycology 2:11-30
  13. Clark GF, Marzinelli EM, Fogwill C, Turney C & Johnston EL (2015) Effects of sea-ice cover on marine benthic communities: a natural experiment in Commonwealth Bay, East Antarctica. Polar Biology 38:1213-1222
  14. Bugnot AB, Coleman RA, Figueira WF & Marzinelli EM (2015) Community-level impacts of the invasive isopod Cirolana harfordi. Biological Invasions 17:1149-1161
  15. Saxena G, Marzinelli EM, Naing NN, He Z, Liang Y, Tom L, Mitra S, Ping H, Joshi UM, Reuben S, Mynampati KC, Mishra S, Umashankar S, Zhou J, Andersen GL, Kjelleberg S & Swarup S (2015) Ecogenomics reveals metals and land-use pressures on microbial communities in the waterways of a megacity. Environmental Science & Technology 49:1462-1471
  16. Clark GF, Kelaher BP, Dafforn KA, Coleman MA, Knott NA, Marzinelli EM & Johnston EL (2015) What does impacted look like? High diversity and abundance of epibiota in modified estuaries. Environmental Pollution 196:12-20
  17. Mayer-Pinto M, Underwood AJ & Marzinelli EM (2015) The matrix influences direct and indirect effects of an anthropogenic disturbance on marine organisms. Environmental Research 136:15-20
  18. Bravo G, Márquez F, Marzinelli EM, Mendez MM & Bigatti G (2015) Effect of recreational diving on Patagonian rocky reefs. Marine Environmental Research 104:31-36
  19. Marzinelli EM, Campbell AH#, Vergés A, Coleman MA, Kelaher BP & Steinberg PD (2014) Restoring seaweeds: does the declining fucoid Phyllospora comosa support different biodiversity than other habitats? Journal of Applied Phycology 26:1089-1096
  20. Campbell AH, Marzinelli EM#, Vergés A, Coleman MA & Steinberg PD (2014) Towards restoration of missing underwater forests. PLOS ONE 9:e84106
  21. Vergés A, Steinberg PD, Hay ME, Poore AG, Campbell AH, Ballesteros E, Heck KL, Booth D, Coleman MA, Feary D, Figueira W, Langlois T, Marzinelli EM, Mizerek T, Mumby P, Nakamura Y, Roughan M, van Sebille E, Sen Gupta A, Smale D, Tomas F, Wernberg T & Wilson SK (2014) The tropicalisation of temperate marine ecosystems: climate-mediated changes in herbivory and community phase shifts. Proceedings of the Royal Society B-Biological Sciences 281:20140846
  22. Bugnot AB, Coleman RA, Figueira WF & Marzinelli EM (2014) Patterns of the non-indigenous isopod Cirolana harfordi in Sydney Harbour. PLOS ONE 9:e86765
  23. Marzinelli EM, Burrows MT, Jackson AC & Mayer-Pinto M (2012) Positive and negative effects of habitat-forming algae on survival, growth and intra-specific competition of limpets. PLOS ONE 7:e51601
  24. Marzinelli EM (2012) Artificial structures influence fouling on habitat-forming kelps. Biofouling 28:339-349
  25. Marzinelli EM, Underwood AJ & Coleman RA (2012) Modified habitats change ecological processes affecting a non-indigenous epibiont. Marine Ecology Progress Series 446:119-129
  26. Marzinelli EM, Underwood AJ & Coleman RA (2011) Modified habitats influence kelp epibiota via direct and indirect effects. PLOS ONE 6:e21936
  27. Johnston EL, Marzinelli EM, Wood CA, Speranza D & Bishop JDD (2011) Bearing the burden of boat harbours: heavy contaminant and fouling loads in a native habitat-forming alga. Marine Pollution Bulletin 62:2137-2144
  28. Marzinelli EM, Zagal CJ, Chapman MG & Underwood AJ (2009) Do modified habitats have direct or indirect effects on epifauna? Ecology 90:2948-2955
  29. Marzinelli EM, Bigatti G & Penchaszadeh PE (2008) Egg strain in the sea urchin Pseudechinus magellanicus (Echinoidea: Temnopleuridae). Revista de Biología Tropical /International Journal of Tropical Biology and Conservation 56:335-339
  30. Bigatti G, Marzinelli EM & Penchaszadeh PE (2008) Seasonal reproduction and sexual maturity in Odontocymbiola magellanica (Neogastropoda: Volutidae). Invertebrate Biology 127:314-326
  31. Marzinelli EM, Bigatti G, Giménez J & Penchaszadeh PE (2006) Reproduction of the sea urchin Pseudechinus magellanicus (Echinoidea: Temnopleuridae) from Golfo Nuevo, Argentina. Bulletin of Marine Science 79:127-136


Scientific Reports

  1. Hedge LH, Johnston EL, Ahyong ST, Birch GF, Booth DJ, Creese RG, Doblin MA, Figueira WF, Gribben PE, Hutchings PA, Mayer-Pinto M, Marzinelli EM, Pritchard TR, Roughan M & Steinberg PD (2014) Sydney Harbour: A systematic review of the science. The Sydney Institute of Marine Science, Sydney, Australia. pp. 76



  1. Marzinelli EM (2015) Las estaciones en el océano. In: Alvarado P & Kornberg J (eds) Proyecto Estaciones Vol. II Otoño. Cooperative Chilavert Artes Gráficas, Buenos Aires, Argentina. p. 2-3
  2. Marzinelli EM (2012) Restoration of missing underwater forests in Sydney. In: Prats J (ed.) National Parks Association of NSW – Southern Sydney Branch Newsletter 100: 2-3