1 Department of Geography, Environment and Population, The University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia. cameron.barr@adelaide.edu.au.
2 Sprigg Geobiology Centre, The University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia. cameron.barr@adelaide.edu.au.
3 Department of Geography, Environment and Population, The University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia.
4 Sprigg Geobiology Centre, The University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia.
5 School of Biosciences, Sutton Bonington Campus, University of Nottingham, Leicestershire, LE12 5RD, UK.
6 Stable Isotope Facility, Centre for Environmental Geochemistry, British Geological Survey, Nottingham, NG12 5GG, UK.
7 Department of Earth Sciences, The University of Adelaide, North Terrace, Adelaide, South Australia, 5005, Australia.
8 School of Geography, Politics and Sociology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK.
9 School for Environment & Sustainability, The University of Michigan, Ann Arbor, Michigan, 48109, USA.
10 Institute of the Environmental Change and Society, University of Regina, Saskatchewan, S4S0A2, Canada.
11 Department of Earth and Environmental Science, The University of Michigan, Ann Arbor, Michigan, 48109, USA.
12 Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia.
13 Queensland Department of Environment and Science, Dutton Park, Queensland, 4102, Australia.
14 Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, New South Wales, 2232, Australia.
15 School of Mathematics and Statistics, University of Western Australia, Crawley, WA, 6009, Australia.