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Key Native Ecosystem Plan for Riversdale-Orui Coast 2016-2019

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Key Native Ecosystem Plan for Riversdale-Orui Coast 2016-2019 Key Native Ecosystem Plan for Riversdale-Orui Coast 2016-2019 Contents 1. Key Native Ecosystem plans 1 2. Riversdale-Orui Coast Key Native Ecosystem 3 3. Landowners, management partners and stakeholders 3 3.1. Landowners 3 3.2. Management partners and key stakeholders 3 4. Ecological values 5 3.1 Ecological significance 5 3.2 Ecological features 5 5. Threats to ecological values at the KNE site 8 5.1. Key threats 8 6. Objectives and management activities 11 6.1. Objectives 11 7. Management activities 12 7.1. Ecological weed control 12 7.2. Pest animal control 13 7.3. Revegetation 13 7.4. Fencing 14 7.5. Other 14 8. Operational plan 15 9. Funding summary 18 9.1. GWRC budget 18 9.2. MDC budget 18 Appendix 1: Site maps 19 Appendix 2: Nationally threatened species list 22 Appendix 3: Regionally threatened plant species list 24 Appendix 4: Planting plans 25 References 28 Riversdale-Orui Coast 1. Key Native Ecosystem plans The Wellington region’s native biodiversity has declined since people arrived and the ecosystems that support it face ongoing threats and pressures. Regional councils have responsibility for maintaining indigenous biodiversity, as well as protecting significant vegetation and habitats of threatened species, under the Resource Management Act 1991 (RMA). Greater Wellington Regional Council’s (GWRC) Biodiversity Strategy (2016)1 sets a framework that guides how GWRC protects and manages biodiversity in the Wellington region to work towards the vision below. GWRC’s vision for biodiversity Healthy ecosystems thrive in the Wellington region and provide habitat for native biodiversity The Strategy provides a common focus across the council’s departments and guides activities relating to biodiversity under this overarching vision, which is underpinned by four operating principles and three strategic goals. Goal One drives the delivery of the Key Native Ecosystem (KNE) programme. Goal One Areas of high biodiversity value are protected or restored The KNE programme is a non-regulatory voluntary programme that seeks to protect some of the best examples of original (pre-human) ecosystem types in the Wellington region by managing, reducing, or removing threats to their ecological values. Sites with the highest biodiversity values have been identified and prioritised for management. Sites are identified as of high biodiversity value for the purposes of the KNE programme by applying the four ecological significance criteria described below. Representativeness Rarity/ Diversity Ecological context Distinctiveness The extent to which Whether ecosystems The levels of natural Whether the site ecosystems and contain ecosystem diversity provides important habitats represent Threatened/At-risk present i.e. two or core habitat, has those that were species, or species at more original high species once typical in the their geographic ecosystem types diversity, or includes region but are no limit, or whether present an ecosystem longer common rare or uncommon identified as a place ecosystems are national priority for present protection 1 Key Native Ecosystems Plan A site must be identified as ecologically significant using the above criteria and be considered sustainable for management in order to be considered for inclusion in the KNE programme. Sustainable for the purposes of the KNE programme is defined as: a site where the key ecological processes remain intact or continue to influence the site and resilience of the ecosystem is likely under some realistic level of management. KNE sites can be located on private or publically-owned land. However, land managed by the Department of Conservation (DOC) is generally excluded from this programme. KNE sites are managed in accordance with three-year KNE plans such as this one, prepared by the GWRC’s Biodiversity department in collaboration with the landowners, tangata whenua and other stakeholders. These plans outline the ecological values, threats, and management objectives for sites and describe operational activities such as ecological weed and pest animal control. KNE plans are reviewed regularly to ensure the activities undertaken to protect and restore the KNE site are informed by experience and improved knowledge about the site. 2 Riversdale-Orui Coast 2. Riversdale-Orui Coast Key Native Ecosystem The Riversdale-Orui Coast KNE site (60.8ha) comprises a variety of coastal ecosystems including sand dunes, the lower reaches of the Motuwairaka Stream and estuary, and salt marsh at Riversdale Beach on the eastern Wairarapa coast. See Appendix 1, Map 1 for the KNE site boundary. The KNE site is important for a wide range of coastal and wetland bird species2 and is the only known breeding site for New Zealand dotterel (Charadrius obscurus) in the Wellington region3. The southern end of the KNE site is adjacent to the Homewood Coast KNE site. These KNE sites combined form an important habitat network for native flora and fauna. 3. Landowners, management partners and stakeholders GWRC works in collaboration with landowners and other interested parties (management partners and stakeholders) where appropriate to achieve shared objectives for the site. In preparing this plan GWRC has sought input from landowners and relevant stakeholders, and will continue to involve them as the plan is implemented. 3.1. Landowners The KNE site is predominantly public land administered by Masterton District Council (MDC). The Crown also has legal ownership over several small areas of marginal strip. The Riversdale Recreation Reserve (38.4ha) is managed by MDC under the Riversdale Recreation Reserve Management Plan and Development Concept Report. This document was compiled in 19964. Another 18.4ha, which is a mixture of marginal strip, esplanade and local purpose reserve land, is included in the KNE site. This 18.4ha is managed under MDC’s District Plan and the Reserves Act 1977. The Crown owns 4ha of marginal strip at the Riversdale Recreation Reserve and Motuwairaka Stream mouth within the KNE site. This area is managed by the Department of Conservation (DOC). 3.2. Management partners and key stakeholders The management partners at this KNE site are GWRC, MDC, DOC, the Wairarapa branch of the Royal Forest and Bird Protection Society of New Zealand (F&B), the Riversdale Beach Dune Management Committee and the Riversdale Beach Ratepayers Association. Within GWRC, the Biodiversity, Biosecurity and Land Management departments are involved with the management of the KNE site. The Biodiversity department plans and coordinates biodiversity management activities and provides biodiversity advice. The Biosecurity department carries out pest plant and animal control activities. The Land Management department works with the local community at the Riversdale Beach sand dunes undertaking restoration planting and ecological weed control. Land Management work with farmers in the wider area under their Farm Environment Plan (FEP) programme, advising on and supporting sustainable land use, soil conservation 3 Key Native Ecosystems Plan and water quality initiatives. Land Management also administers various catchment schemes such as the Whareama and Homewood catchment schemes. MDC fund and support community-based dune restoration carried out with the Riversdale Beach Dune Management Committee. The partnership is subject to a Memorandum of Understanding and the Committee works under terms of reference drawn up in 20135. MDC also fund and carry out reserve management work in the Riversdale Recreation Reserve. DOC manages land on behalf of the Crown and is on the Riversdale Beach Dune Management Committee. F&B work in partnership with GWRC Biodiversity department and assist with managing the shorebird nesting habitat in the northern Riversdale dunes. They maintain the semi-permanent fencing built to protect this habitat, erect temporary fencing with materials supplied by GWRC during the nesting season outside this area if required, and actively work to improve nesting success, particularly of New Zealand dotterels. They also provide information about the nesting birds to residents and visitors to the area to educate and raise awareness. The Riversdale Beach Ratepayers Association and local residents support the protection of nesting shorebird habitat by providing information to the public about the nesting shorebirds and their habitat. Rangitane o Wairarapa and Ngāti Kahungunu ki Wairarapa iwi have identified the lower reaches of the Motuwairaka Stream as being of significance for mahinga kai and wāhi tapu values6. Ngai Tumapuhia a Rangi ki Motuwairaka (Ngāti Kahungunu) marae and its hapu have mana whenua in this area7. 4 Riversdale-Orui Coast 4. Ecological values This section describes the various ecological components and attributes that make the KNE site important. These factors determine the site’s value at a regional scale and how managing it contributes to the maintenance of regional biodiversity. Examples of values are the provision of important habitat for a threatened species, or particularly intact remnant vegetation typical of the ecosystem type. The ecological values of a site are used to prioritise allocation of resources to manage KNE sites across the region. 3.1 Ecological significance The Riversdale-Orui Coast KNE site is located within the Eastern Wairarapa Ecological District and is typical of the ecological district that is characterised by a long coastline with rocky points and cliffs, extensive coastal reefs and sandy beaches8. It has warm summers with spring and summer droughts, and an annual rainfall of
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