Nick Roskruge

Traditional Māori horticultural and ethnopedological praxis in the New Zealand landscape

Purpose – The purpose of this paper is to explore the application of traditional Māori horticultural and ethnopedological practices in New Zealand whereby an inclusive “whole of landscape” approach known as “ki uta ki tai” – literally from “the source to the oceans” – is applied in a contemporary landscape.Design/methodology/approach – A review of the traditional knowledge and practices around Māori horticulture and pedology was undertaken through interviews within Māori communities, including practitioners of this knowledge, and a literature review.Findings – Traditional Māori practices contribute to a cultural management tool known as kaitiakitanga – literally the act of stewardship – which requires practitioners to contribute to the “landscape management” continuum based on a holistic approach reflecting the traditional and contemporary management needs. Examples of cultural praxis applied under these systems include the local knowledge aligned to soil origin, type and manageable characteristics and cr...

Evidence of a Strong Domestication Bottleneck in the Recently Cultivated New Zealand Endemic Root Crop, Arthropodium cirratum (Asparagaceae)

We use chloroplast DNA sequencing to examine aspects of the pre-European Māori cultivation of an endemic New Zealand root crop, Arthropodium cirratum (rengarenga). Researching the early stages of domestication is not possible for the majority of crops, because their cultivation began many thousands of years ago and/or they have been substantially altered by modern breeding methods. We found high levels of genetic variation and structuring characterised the natural distribution of A. cirratum, while the translocated populations only retained low levels of this diversity, indicating a strong bottleneck even at the early stages of this species’ cultivation. The high structuring detected at four chloroplast loci within the natural A. cirratum range enabled the putative source(s) of the translocated populations to be identified as most likely located in the eastern Bay of Plenty/East Cape region. The high structuring within A. cirratum also has implications for the conservation of genetic diversity within this species, which has undergone recent declines in both its natural and translocated ranges.