On the Risk Levels of Environmental Impact Associated with Climate Change at Raglan, New Zealand

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dc.contributor.advisor Weller, Evan
dc.contributor.author Glassom-Pick, Simone
dc.date.accessioned 2021-11-05T00:19:22Z
dc.date.available 2021-11-05T00:19:22Z
dc.date.issued 2021 en
dc.identifier.uri https://hdl.handle.net/2292/57276
dc.description.abstract Coastal environments are threatened by climate change related increases in sea surface temperature (SST) and sea level rise (SLR). SST is predicted to have the most pervasive effect on biological function. SLR is likely to have the greatest impact on low lying coastlines and intertidal habitats. As the west coast is projected to have the highest SLR, in New Zealand, a study of these changes at Raglan, an estuary on the west coast of the North Island was conducted. The risk levels associated with these changes was assessed. Following a similar approach to a recent study, a combination of remote sensing light detection and ranging (LiDAR) data and the International Union for Conservation of Nature (IUCN) Red List of Ecosystems, was used. Satellite and locally acquired SST and sea level (SL) data were used to determine percentage change during both the past and future 50 year periods. Vulnerability of ecosystems to abiotic changes was then determined. Three future scenarios were used for SST and SLR based on the literature. It is found that historical change in SST (1.03 - 1.63°C) is comparable to future projections of 1 - 2°C (6 - 11% change in absolute value). Further studies are required to determine the adaptive range of biota at Raglan to such change. Marine ecosystems are not deemed vulnerable following the historical SLR (12cm / 9% change in SL), however, changes in inundation are likely to have had undesirable consequences. Marine ecosystems are considered ‘vulnerable’ following a future SLR of 45% at RCP8.5 (SLR 65cm). LiDAR data is shown to be extremely useful for predicting and illustrating inundation and loss of intertidal zone at future scenarios. The high risk to low lying sandy shorelines is clearly illustrated. Extensive loss of intertidal zone at RCP8.5 is projected and habitat squeeze illustrated. Two environments, the cove off Cliff Street and Cox Bay are projected to become ‘vulnerable’ at RCP8.5 following intertidal zone losses of 34 and 44% respectively. To our knowledge this is the first study to use both LiDAR data and the IUCN Red List to determine the potential future risk to coastal environments in New Zealand, associated with climate change.
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-nd/3.0/nz/
dc.title On the Risk Levels of Environmental Impact Associated with Climate Change at Raglan, New Zealand
dc.type Thesis en
thesis.degree.discipline Environmental Science
thesis.degree.grantor The University of Auckland en
thesis.degree.level Masters en
dc.date.updated 2021-10-04T05:56:47Z
dc.rights.holder Copyright: the author en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en

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