More links and websites
More suggestions and sources
MacEwen, W. M. Ecological regions and districts of New Zealand. 3rd ed. Wellington: Department of Conservation, 1987.
Pawson, Eric, and Tom Brooking, eds. Environmental histories of New Zealand. Melbourne: Oxford University Press, 2002.
Simpson, Philip, ed. Ecological regions and districts of New Zealand: a natural subdivision. Wellington: Biological Resources Centre, 1982.
Young, David. Our islands, our selves: a history of conservation in New Zealand. Dunedin: University of Otago Press, 2004.