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ItemDescription
Neil Fitzgerald
Landcare Research Hamilton
Technical Donkey
Gate 10 Silverdale Road, University of Waikato Campus
Hamilton
Waikato
fitzgeraldn@landcareresearch.co.nz
3240
nz
07 859 3746
ArcGIS 9.3
Nancy Willems
Environment Bay of Plenty
Environmental Scientist
5 Quay Street, P O Box 364
Whakatane
Bay of Plenty
P O Box 364
nancy.willems@envbop.govt.nz
nz
0800 368 267
0800 368 329
Contact Nancy Willems at Environment Bay of Plenty
Feature Class
0.000
August 2010
20100825
20100715
Neil Fitzgerald
Landcare Research Hamilton
Technical Researcher
Gate 10 Silverdale Road, University of Waikato Campus
Hamilton
Waikato
fitzgeraldn@landcareresearch.co.nz
07 859 3746
Mark Smale
Landcare Research Hamilton
Scientist
Gate 10 Silverdale Road, University of Waikato Campus
Hamilton
Waikato
3240
smalem@landcareresearch.co.nz
nz
07 859 3729
20100827
20100825
Geothermal Vegetation Extent 2020
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="text-align:Justify;margin:8 0 0 0;"><SPAN STYLE="font-size:12pt">To map current extents of geothermal vegetation and habitats in the Bay of Plenty Region. This was then used to map real losses of geothermal vegetation/habitats. See report ‘An Assessment of Gain and Loss of Geothermal Vegetation and Habitats in the Bay of Plenty Region Based on 2015, 2016, 2017, 2018 and 2019 Aerial Photographs’ – </SPAN><SPAN STYLE="font-size:12pt">Objective reference A____.</SPAN><SPAN /><SPAN STYLE="font-size:12pt">Report not yet finalised</SPAN></P><P STYLE="text-align:Justify;margin:8 0 0 0;"><SPAN /></P><P STYLE="text-align:Justify;"><SPAN STYLE="font-weight:bold;">Data Set Originator: </SPAN><SPAN /></P><P STYLE="text-align:Justify;margin:8 0 0 0;"><SPAN STYLE="font-size:12pt">Wildland Consultants Ltd - An Assessment of Gain and Loss of Geothermal Vegetation and Habitats in the Bay of Plenty Region Based on 2015, 2016, 2017, 2018 and 2019 Aerial Photographs. Contract report umber 5404.</SPAN></P><P STYLE="text-align:Justify;margin:8 0 0 0;"><SPAN /></P></DIV></DIV></DIV>
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>None</SPAN></P></DIV></DIV></DIV>
1500
Geothermal
Vegetation
Bay of Plenty
Field Survey
Ecological districts
Threats
Modification
Vulnerability
Ecological Significance
Bay of Plenty
Rotorua
Tikorangi South
Tikorangi North
Waitangi Soda Springs Mire
Waitangi Soda Springs Hot Springs
Te Rata (Hot water beach)
Tarawera Rift
Parimahana
Parimahana extension
Kawerau Township
Maketu
Moutohora (Whale Island)
Tukuri
Pukaahu Springs (Awakeri)
Puhipuhi
Waiaute Springs
Te Weta Bay
Wharetata Bay
Cemetery Reserve
Puarenga Park (Soccer Park)
Government Gardens
Pohaturoa
Te Rei Bay
Waimangu North
Taheke
Ohinemutu
Kuirau Park
Sulpur Point
Old Government Gardens
Ngapuna
Arawa Park Racecourse
Wonderland
Arikikapakapa (Golf course)
Tangatarua (Old Taupo Road Reserve)
Whakarewarewa
Redwood Grove Pool
Hell's Gate
Tikitere Northwest
Otutarara Springs
Maraeroa
Ruahine Springs
Papakiore Springs
Parengarenga Springs
Manupirua Hot Springs
Tikitere Bore
Mokoia Island
Waimangu-Rotomahana
Tikorangi Central
20070101
15
100
Meters
1 Meter = 1 m
Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.0.12790
1
176.213255
177.239732
-37.509372
-38.327272
Geothermal Site boundaries with in the Bay of Plenty Region 2020 – A desktop mapping exercise using recent (2015-2017 and 2018/2019) aerial photographs to update mapping of geothermal sites last done in 2010. Two sites are now included that had previously been left off, but were know geothermal habitats (Whakaari (White Island) and part Maungakākaramea (Rainbow Mountain)).
2010
2007
geothermal
vegetation
Bay of Plenty Regional Council
The dataset history and methods are described below, refer to the report for more detail.
Objectives of the Project.
To identify, map, and describe the vegetation of all known geothermal sites in the BOP Region, and assess changes since 2003.
To assess the relative significance of each site using EBOP RPS criteria in terms of national, regional, and local significance.
Methods of the Project involved in the Acquistion of Data.
The latest (2007) aerial imagery of the Region was compared with the previous (2003) imagery to detect differences in geothermal vegetation.
Fourty-one sites were visited and re-assessed in autumn 2010, paying particular attention to apparent changes 2003-2007.
Vegetation type polygons were corrected on the latest imagery.
The relative significance (National, Regional, or Local) of each site was assessed in terms of EBOP RPS criteria. Aerial imagery from 2007 and 2003 Regional Digital Aerial Mosaic (RDAM), and GIS shapefiles derived from the latter (Wildland Consultants 2005a) were compared to identify geothermal sites where change in the extent or condition had occurred. Field surveys were undertaken in April-June 2010 at almost all sites known to support geothermal vegetation in the Bay of Plenty Region to identify geothermal vegetation using, where possible, the hierarchical classification of geothermal vegetation types developed in previous mapping of geothermal vegetation in the Bay of Plenty for EBOP (Wildland Consultants 2005a). Geothermal sites were mapped over 2007 aerial photographs and their vegetation described, based on imagery and field verification (Appendix 1). Where they were an integral part of the site, adjacent non-geothermal vegetation types were also described. The hydrosystem (i.e., terrestrial or geothermal wetland) of each habitat was recorded. Special features of the flora and fauna present, threats to integrity and continued viability, modifications, and current condition were recorded and management requirements identified. Results were assessed to identify changes in the extent and condition of geothermal vegetation since 2005. Earlier mapping errors leading to apparent changes in extent/condition were identified. A copy of the field form is appended (Appendix 3); common names and scientific equivalents are listed in Appendix 4. For sites not visited on the current survey, information is drawn almost entirely from Wildland Consultants (2005b).
The ecological significance of each site was assessed against the Bay of Plenty Regional Policy Statement (RPS) - Heritage Criteria: Appendix F, Set 3 and Guidelines (Appendix 5). Relative ecological significance was assessed at national, regional, and local scales, and justification provided for each ranking, using Criteria from Environment Waikato for Assessment of Relative Significance (Appendix 6). The reasons for altered polygons are given under Extent of Change, due either to 'Real' changes or 'Mapping' changes. Real changes may be either changes in vegetation type or area, or both, in which case the type change takes priority, i.e., there was usually also a degree of area change but more importantly, the type changed. 'Area change' is defined as being changes >1m2.
Mapping changes may be either changes in vegetation type or area, or both, in which case the type change takes priority. This report includes an index of geothermal sites, whether visited or not, and the appendices include information on other geothermal sites in the Region where no vascular vegetation is known to occur (Appendix 2), descriptions of geothermal habitats (Appendix 7), notes on the vascular flora of geothermal areas (Appendix 8), descriptions of vegetation classes (Appendix 9), and a glossary of technical terms (Appendix 10). An Excel spreadsheet containing the vegetation information was prepared for migration into the EBOP Geothermal database. Final shapefiles and accompanying metadata, the final report (in hard and electronic copies), and the Excel spreadsheet were provided to Environment Bay of Plenty.
Results.
The vegetation types of 93 polygons (19% of the total) across all sites were altered as a result of the current survey. The vast majority of changes are due to previous inaccuracies rather than real changes in vegetation since it was last assessed.
Better aerial photography has enabled more precise mapping of vegetation types, which accounts for nearly half of the changes in vegetation mapping. More than half of the changes in vegetation mapping were due to revisions in vegetation classification made during field inspection. Another substantial reason for altered typing is the presence of prostrate kanuka in many polygons where it was previously described as 'normal' kanuka.
A further reason for the changes is replacement of the structural class 'shrubland' (shrub cover <80 %) by 'scrub' (shrub cover >80 %).
33 sites were ranked as of National, 6 sites of Regional, and 2 sites of Local significance in terms of EBOP RPS criteria. Four sites with no native geothermal vegetation remaining did not meet any ranking criteria.
Two overall trends are apparent: a general increase in the level of weed infestation and an increase in weed control.
GeothermalVegetationExtent
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SiteName
Site Name
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0
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AreaHA
Area (Hectares)
Double
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Coordinates defining the features.
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Shape.STLength()
Shape.STLength()
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dataset
EPSG
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Simple
FALSE
51
TRUE
FALSE
20210224