Quantifying the ecological changes associated with the conversion of pasture to mānuka (Leptospermum scoparium) farms

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dc.contributor.advisor Pattemore, David
dc.contributor.advisor Beggs, Jacqueline
dc.contributor.author Woodall, Georgia N.
dc.date.accessioned 2023-05-23T02:32:18Z
dc.date.available 2023-05-23T02:32:18Z
dc.date.issued 2022 en
dc.identifier.uri https://hdl.handle.net/2292/64112
dc.description.abstract Mānuka honey is an important economic resource to New Zealand. To keep up with demand, mānuka farms are being created to farm honey bees to increase the unique mānuka factor and the total volume of honey produced on site. These farms are being planted on high-country farm stations; land that is seen as less productive. The effects of this conversion on the wider ecosystem are unknown. As a case study, I studied the ecosystems at four sites representing different points in the transition from pasture to mānuka forest: pasture, three-year-old mānuka, five-year-old mānuka, and > 30-yearold regenerated forest. Terrestrial invertebrate surveys using window traps and sweep netting, bat and bird surveys, stream health assessments, and collection of macroinvertebrates were undertaken at a central North Island property. I found that the older mānuka planting and the regenerated forest were most similar in terms of the site characteristics of mānuka and the community composition of invertebrates, birds, and bats. The older mānuka planting and old regenerated mānuka forests were habitats of high value for forest birds and long-tailed bats. Stream health was higher in streams that flowed through native vegetation and mānuka farms than the pasture stream. However, the abundance of native bees and bumble bees decreased from pasture to the older mānuka. My results supported the hypothesis that mānuka can provide more valued habitat to taxa than pasture; however, this only began to occur between three-five years after planting. Further study is needed on the effects of preparation and planting on the sites on the local biodiversity. There appears to be an initial decrease in some taxa at the younger planting compared to pasture, followed by a substantial increase in biodiversity and the site's value between three to five years after planting, which should also be further studied to see if this trend occurs at other sites. This data provides a baseline survey of biodiversity to track future changes, as well as an assessment of the ecological changes that have already occurred within five years of planting. These will aid in developing management systems to improve the ecological outcomes of mānuka farming.
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof Masters Thesis - University of Auckland en
dc.relation.isreferencedby UoA en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/nz/
dc.title Quantifying the ecological changes associated with the conversion of pasture to mānuka (Leptospermum scoparium) farms
dc.type Thesis en
thesis.degree.discipline Biological Sciences
thesis.degree.grantor The University of Auckland en
thesis.degree.level Masters en
dc.date.updated 2023-03-20T03:49:48Z
dc.rights.holder Copyright: the author en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en

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