About the Authors

Dianne M. Tracey

d.tracey@niwa.co.nz

Affiliation Deepwater Group, National Institute of Water and Atmospheric Research, Wellington, New Zealand

Malcolm R. Clark

Affiliation Deepwater Group, National Institute of Water and Atmospheric Research, Wellington, New Zealand

Owen F. Anderson

Affiliation Deepwater Group, National Institute of Water and Atmospheric Research, Wellington, New Zealand

Susan W. Kim

Affiliation Flinders Centre for Epidemiology and Biostatistics, Flinders University, South Australia, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DMT MRC. Analyzed the data: OFA SK. Contributed reagents/materials/analysis tools: DMT MRC OFA SK. Wrote the paper: DMT MRC OFA.