An assessment of the ecological restoration on Motuora Island

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dc.contributor.advisor Beggs, J en
dc.contributor.advisor Gardner-Gee, R en Wallace, Stephen en 2016-02-01T20:50:52Z en 2015 en
dc.identifier.citation 2015 en
dc.identifier.uri en
dc.description Full text is available to authenticated members of The University of Auckland only. en
dc.description.abstract Ecological restoration is increasingly being undertaken to reverse the declines in biodiversity and to restore ecosystem functioning in damaged environments. On New Zealand islands it is especially significant because islands act as refugia for the native biota because they are naively vulnerable to invasive predators widespread on the mainland. On Motuora Island restoration began two decades ago (in the 1990’s) and previous studies on the Island in 2004 indicated that the planted forest sites had native beetles establishing in them but not the same assemblage as in the unmanaged naturally regenerating sites. We resurveyed the flighted beetle fauna at planted, unmanaged and pasture sites to investigate what changes had occurred since last decade. We remeasured the vegetation plots established on the Island and conducted leaf litter experiments to measure the rate of decomposition at the planted, unmanaged and pasture sites. Beetle fauna from the 2004 study was assigned functional groupings to investigate functional differences across the sites. The results were that the flighted beetle fauna of the planted sites had converged on the unmanaged sites, as planted and unmanaged forests had similar native beetle diversity, abundance and composition. Vegetation changes were also detected and the planted forests have converged on the same stem density as the unmanaged forests. However, functional analysis revealed that in 2004 the ground beetle functional composition in unmanaged forest sites differed from both planted forest and pasture sites, with many more predatory beetles present in unmanaged forest sites. In both 2005 and 2014, litter decomposition was significantly slower in unmanaged forests than in other vegetation types. These results suggest that the efforts to restore Motuora Island are achieving success in restoring the Island’s flora and fauna, although it is not certain whether the functional diversity in planted sites will eventually resemble unmanaged assemblages. The decomposition findings indicate that ecosystem function still differs between planted and unmanaged forests, and may take more time to resolve naturally. en
dc.publisher ResearchSpace@Auckland en
dc.relation.ispartof Masters Thesis - University of Auckland en
dc.relation.isreferencedby UoA99264865405102091 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights Restricted Item. Available to authenticated members of The University of Auckland. en
dc.rights.uri en
dc.title An assessment of the ecological restoration on Motuora Island en
dc.type Thesis en Biosecurity and Conservation en The University of Auckland en Masters en
dc.rights.holder Copyright: The Author en
pubs.elements-id 519022 en
pubs.record-created-at-source-date 2016-02-02 en

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