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Significant natural areas of the Otorohanga district: terrestrial and wetland ecosystems

TR 2016/36

Report: TR 2016/36

Author: Wildlands Consultants Limited 

About this report

Waikato Regional Council identifies and prioritises significant natural areas (SNA) as an important part of protecting natural areas, to maintain indigenous biodiversity and to safeguard the life-supporting capacity of ecosystems. This process is required under (Section 6(c) of RMA) to maintain and enhance biodiversity.

The objectives of the project is setting up inventories by Biodiversity Vegetation GIS mapping, using Waikato Regional Council policy statement criteria to identify SNA and prioritising SNA sites for biodiversity management in Otorohanga district. This project aims to identify and rank sites of high biodiversity value, and outline the management procedures that may be required to maintain and enhance biodiversity in the region.

Five hundred and twelve (512) SNA were identified within the Otorohanga district. These areas cover c.58, 050 ha, or 28% of the district. forty-two threatened, at risk, or notable animal species, one threatened fungus species, and 42 threatened, at risk, or notable vascular plant species have been recorded in the Otorohanga district.

This report provides the background and summary of a baseline inventory and ranking of SNA covering terrestrial (including islands and sand dunes) and wetland ecosystems in the Otorohanga District. The SNA inventory will provide a regional context for biodiversity assets and priority sites for management and monitoring. This information is essential to the implementation of the Regional Policy Statement, the Pest Management Strategy and district council biodiversity goals, as well as meeting objectives identified in Waikato Regional Council's Long Term Plan.

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Significant natural areas of the Otorohanga district: terrestrial and wetland ecosystems [PDF, 2 MB]

Contents

ABSTRACT V
  EXECUTIVE SUMMARY VI
1 INTRODUCTION 1
2 OBJECTIVES 1
 3 METHODS 2
 3.1 Introduction 2
 3.2 GIS mapping and analysis  2
 3.3  Literature review and assessment of ecological information  2
3.4  Significance assessment and level of significance  3
3.5 Ranking 3
3.6 Review and revision process 3
4 ECOLOGICAL CHARACTER OF THE OTOROHANGA DISTRICT 3
4.1 General overview 3
4.2 Kawhia Ecological District 7
4.2.1  Overview  7
4.2.2  Bioclimatic zones  7
4.2.3  Geology and soils  7
4.2.4  Vegetation  8
4.2.5  Flora  9
4.2.6  Fauna  10
4.2.7  Protected significant natural areas 12
4.2.8  Other key significant natural areas  13
4.3  Waipa Ecological District  14
4.3.1  Overview  14
4.3.2  Bioclimatic zones  14
4.3.3  Geology and soils  14
4.3.4  Vegetation  14
4.3.5  Flora 15
4.3.6  Fauna  15
4.3.7  Protected significant natural areas  15
4.3.8  Other key significant natural areas  16
4.4  Ranginui Ecological District  16
4.4.1  Overview  16
4.4.2  Bioclimatic zones  16
4.4.3  Geology and soils  16
4.4.4  Vegetation  17
4.4.5  Flora  17
4.4.6  Fauna  17
4.4.7  Protected significant natural areas  18
4.4.8  Other key significant natural areas  19
4.5  Pureora Ecological District  20
4.5.1  Overview  20
4.5.2  Bioclimatic zones  20
4.5.3  Geology and soils  21
4.5.4  Vegetation  21
4.5.5  Flora  21
4.5.6  Fauna  22
4.5.7  Protected significant natural areas  22
4.5.8  Other key significant natural areas  23
4.6  Waitomo Ecological District  23
4.6.1 Overview  24
4.6.2 Bioclimatic zones  24
4.6.3 Geology and soils  24
4.6.4 Vegetation  24
4.6.5 Flora  25
4.6.6 Fauna  25
4.6.7 Protected significant natural areas  25
4.6.8 Other key significant natural areas  26
4.7 Tokoroa Ecological District  26
4.7.1 Overview  26
4.7.2 Bioclimatic zones  26
4.7.3 Geology and soils  27
4.7.4 Vegetation  27
4.7.5 Flora  27
4.7.6 Fauna  27
4.7.7 Protected significant natural areas  27
4.7.8 Other key significant natural areas  28
5. INDIGENOUS VEGETATION  28
5.1 General overview  28
5.2 Protected indigenous vegetation  28
6. THREATENED, AT RISK, AND OTHER NOTABLE SPECIES  30
6.1 Flora  30
6.2 Fauna  31
7. OTHER SIGNIFICANT FEATURES  33
7.1 Geological features  33
7.2 Distinctive and uncommon habitat types  34
8. RESULTS OF THE SIGNIFICANT NATURAL AREAS INVENTORY AND ASSESSMENT  34
8.1 Results of the assessment  34
8.2 Limitations of the assessment  41
9. CONCLUSIONS  41
10. RECOMMENDATIONS  42
10.1 Kawhia Ecological District  42
10.2 Waipa Ecological District  43
10.3 Ranginui Ecological District  43
10.4 Pureora Ecological District  44
10.5 Waitomo Ecological District  44
10.6 Tokoroa Ecological District  45