1. Ph.D. Candidate, School of Environment, Univ. of Auckland, Auckland 1142, New Zealand (corresponding author).
2. Associate Professor, School of Environment, Univ. of Auckland, Auckland 1142, New Zealand; Unit for Environmental Sciences and Management, North-West Univ., Potchefstroom 2520, South Africa.
3. Professor, Dept. of Geological Sciences, Univ. of Canterbury, Christchurch 8140, New Zealand. ORCID: .
4. Professor, School of Environment, Univ. of Auckland, Auckland 1142, New Zealand.