Show simple item record

dc.contributor.authorHearnshaw, Edward J. S.en
dc.contributor.authorHughey, Kenneth F. D.en
dc.date.accessioned2010-12-05T22:44:13Z
dc.date.issued2010en
dc.identifier.isbn9780864762337en
dc.identifier.otherNo. 17en
dc.identifier.urihttps://hdl.handle.net/10182/2942
dc.description.abstractThis report develops and applies a tolerance range approach for investigating the set of values provided by the shallow lake ecosystem, Te Waihora/Lake Ellesmere. A tolerance range refers to the extent to which a selected species (representing an indicator of a value) can continue to produce and reproduce in the long-term for a particular environmental condition critical to its survival. The set of values provided by Te Waihora/Lake Ellesmere that are investigated in this report include: the Lake Margin Vegetation Value, the Birdlife Value, the Agricultural Livestock Value, the Native Fishery Value, the Ngāi Tahu Value and the Trout Fishery Value. Indicator species, which are a few selected species that represent a value, were determined by experts for each of the values, so that it becomes possible to consider all values without having to account for the myriad of possible species found on the lake. Critical environmental conditions or controlling factors that determine the survivability of indicator species for each of the values were also established and weighted by experts. Finally, tolerance ranges for each indicator species were elicited by experts for each controlling factor. From this information tolerance range indices were calculated on a zero-to-one scale for each indicator species in relation to each controlling factor. The calculated tolerance range indices established the degree of tolerance for each indicator species for that particular controlling factor considered. These tolerance range indices were then multiplied by the weights given to controlling factors in order to establish weighted indices. From these weighted indices, which were then summed, it was established that the Lake Margin Vegetation Value, the Agricultural Livestock Value and the Trout Fishery Value are the most vulnerable to further losses. Accordingly, this tolerance range approach was able to investigate all values considered, yet provide systematically and quantitatively developed insights using only a limited amount of critical information for determining the present vulnerability of values provided. The determination of the present vulnerability of values provided by Te Waihora/Lake Ellesmere is important in understanding where lake management is required for all values to be preserved along sustainable pathways.en
dc.description.sponsorshipThis report was made possible through financial support from Environment Canterbury, who desired an application of a tolerance range approach for investigating the loss of the many values provided by Te Waihora/Lake Ellesmere. This report was also made possible through the information obtained from various experts associated with these values. These experts were affiliated to the Christchurch City Council, Environment Canterbury, Fish and Game New Zealand, Lincoln University, Ministry of Fisheries, National Institute of Water and Atmospheric Research, Ngāi Tahu and the Waihora Ellesmere Trust. Finally, we acknowledge the contribution of Ian Whitehouse at Environment Canterbury who reviewed this report.en
dc.format.extent1-67en
dc.language.isoenen
dc.relationThe original publication is available from - http://hdl.handle.net/10182/2942en
dc.relation.ispartofseriesLEaP Reporten
dc.rights©LEaP, Lincoln University, New Zealand 2010. This information may be copied or reproduced electronically and distributed to others without restriction, provided LEaP, Lincoln University is acknowledged as the source of information. Under no circumstances may a charge be made for this information without the express permission of LEaP, Lincoln University, New Zealand.en
dc.subjecttolerance range approachen
dc.subjectshallow lake ecosystemsen
dc.subjectTe Waihora/Lake Ellesmereen
dc.subjectindicator speciesen
dc.subjectlake managementen
dc.subjectsustainabilityen
dc.titleA tolerance range approach for the investigation of values provided by Te Waihora/Lake Ellesmere.en
dc.typeReport
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agribusiness and Commerceen
lu.contributor.unitDepartment of Financial and Business Systemsen
lu.contributor.unitFaculty of Environment, Society and Designen
lu.contributor.unitDepartment of Environmental Managementen
lu.contributor.uniten
lu.contributor.uniten
pubs.commissioning-bodyEnvironment Canterburyen
pubs.confidentialfalseen
pubs.notesReport prepared for Environment Canterbury LEaP Report No. 17en
pubs.organisational-group/LU
pubs.organisational-group/LU/Faculty of Agribusiness and Commerce
pubs.organisational-group/LU/Faculty of Agribusiness and Commerce/FABS
pubs.organisational-group/LU/Faculty of Environment, Society and Design
pubs.organisational-group/LU/Faculty of Environment, Society and Design/DEM
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/2018 PBRF Staff group
pubs.publication-statusPublisheden
pubs.publisher-urlhttp://hdl.handle.net/10182/2942en
dc.publisher.placeLincoln University, Christchurchen
lu.identifier.orcid0000-0002-1659-5331
lu.subtypeCommissioned Reporten


Files in this item

Default Thumbnail

This item appears in the following Collection(s)

Show simple item record