REES VALLEY Lease Number : PO 311 Conservation Resources Report
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Crown Pastoral Land Tenure Review Lease name : REES VALLEY Lease number : PO 311 Conservation Resources Report - Part 1 As part of the process of tenure review, advice on significant inherent values within the pastoral lease is provided by Department of Conservation officials in the form of a conservation resources report. This report is the result of outdoor survey and inspection. It is a key piece of information for the development of a preliminary consultation document. They are released under the Official information Act 1982. March 05 “RELEASED UNDER THE OFFICIAL INFORMATION ACT” REES VALLEY PASTORAL LEASE CONSERVATION RESOURCES REPORT Department of Conservation June 2004 “RELEASED UNDER THE OFFICIAL INFORMATION ACT” CONTENTS PART 1: Introduction.....................................................................................................2 PART 2: Inherent Values ...............................................................................................3 2.1 Landscape ................................................................................................3 2.1.1 Landscape Context.......................................................................3 2.1.2 Landscape Description.................................................................4 2.1.3 Significance of the Landscapes....................................................7 2.2 Landforms and Geology ..........................................................................8 2.3 Climate.....................................................................................................9 2.4 Land Environments of New Zealand.......................................................9 2.5 Vegetation..............................................................................................10 2.5.1 Ecological Context.....................................................................10 2.5.2 Plant Communities.....................................................................10 2.5.3 Significance of the Vegetation...................................................16 2.5.4 Problem Plants ...........................................................................18 2.6 Fauna......................................................................................................19 2.6.1 Invertebrate Fauna .....................................................................19 2.6.2 Avifauna.....................................................................................23 2.6.3 Herpetofauna..............................................................................26 2.6.4 Aquatic Fauna............................................................................27 2.6.5 Mammals ...................................................................................29 2.6.6 Problem Animals .......................................................................29 2.7 Historic ..................................................................................................30 2.8 Public Recreation...................................................................................31 2.8.1 Physical Characteristics .............................................................31 2.8.2 Legal Access..............................................................................32 2.8.3 Activities....................................................................................33 PART 3: Other Relevant Matters and Plans ..............................................................34 3.1 Consultation...........................................................................................34 3.2 District Plans..........................................................................................35 3.3 Conservation Management Strategies ...................................................35 3.4 New Zealand Biodiversity Strategy.......................................................36 PART 4: Attachments...................................................................................................37 4.1 Additional Information ..........................................................................37 4.1.1 Scientific Names of Species ......................................................37 4.1.2 References Cited........................................................................40 4.1.3 Appendices.................................................................................42 4.2 Maps .......................................................................................................... 4.2.1 Topographical and Cadastral Boundaries...................................... 4.2.2 Landscape Units and Significant Landscape Values ..................... 4.2.3 Significant Ecological, Historic and Recreation Resources .......... 4.3 Photographs ............................................................................................... 1 “RELEASED UNDER THE OFFICIAL INFORMATION ACT” PART 1 INTRODUCTION This report describes the inherent values present on Rees Valley Pastoral Lease. Rees Valley Pastoral Lease covers an area of approximately 18812 ha on the Richardson Mountains northeast of Glenorchy in Otago. Most of the property is located on the western flank of the Richardson Mountains, in the Rees Valley. A smaller triangular-shaped section is located on the eastern flank of the Richardson Mountains in the Shotover River catchment. The property lies between the head of Rees Valley and the Ox Burn on the western side of the Richardson Mountains, and covers the headwaters of the Flood Burn and Savage Burn on the eastern side. It ranges in altitude from approximately 400 m in the Rees Valley to 2480 m at Mt Ferguson. Rees Valley Pastoral Lease adjoins Earnslaw Pastoral Lease to the west across the Rees River, Mount Aspiring National Park (Land Unit F38500; 192854 ha) to the northwest and north across the Rees Valley, Shotover Conservation Area (Land Unit E40057; 3500 ha) to the northeast, The Branches Special Lease and The Branches Pastoral Lease to the east, Mt Aurum Recreation Reserve (Land Unit E40059; 9100 ha) to the southeast and Temple Peak Pastoral Lease to the south. Other areas of public conservation land adjacent or near to the property are Invincible Mine Historic Reserve (Land Unit E40060; 2.5 ha) within the property boundary near Invincible Creek, Upper Rees Valley Marginal Strip (Land Unit E40056; 10 ha) along the Rees River at the northern end of the property, Rees River Marginal Strip (Land Unit E40051; 80 ha) along the Rees River on the western property boundary, and Rees Valley Road Stewardship Area (Land Unit E40072; 7.5 ha) at the southwest corner of the property. Most of the property lies in the Richardson Ecological District, within Lakes Ecological Region (McEwen, 1987). A small northern part of the property, comprising Twenty Five Mile Spur and head of the valley, lies in the Dart Ecological District within Aspiring Ecological Region. No Protected Natural Areas Programme surveys have been undertaken in these ecological districts. Rees Valley Pastoral Lease lies within a spectacular mountain setting. The property adjoins, and is effectively an enclave within, some of New Zealand s best-known mountain country. Its proximity to the Rees-Dart Walking Track, the high mountain peaks of Mount Aspiring National Park and the Main Divide of the Southern Alps, gives the property an iconic status. The landscapes, vegetation and fauna habitats of Rees Valley Pastoral Lease are contiguous with and complementary to important landscapes, vegetation and habitats within surrounding protected natural areas. These attributes give the property special importance as a high country property and as a natural area for conservation and recreation. 2 “RELEASED UNDER THE OFFICIAL INFORMATION ACT” PART 2 INHERENT VALUES: DESCRIPTION OF CONSERVATION RESOURCES AND ASSESSMENT OF SIGNIFICANCE 2.1 LANDSCAPE 2.1.1 Landscape Context Rees Valley Pastoral Lease includes river flats in Rees Valley, moderate to steep mountain slopes on the west side of the Richardson Mountains and rugged terrain on the east side of the mountains in the upper Shotover catchment. Glaciation and subsequent weathering are the principle processes that have shaped the appearance of the landscape. Rees Valley is a steep-sided U-shaped valley and includes ice-sculptured hummocky terrain, ice-scraped valley sides and moraine. The braided Rees River is a major feature on the valley floor. The property is close to the Main Divide of the Southern Alps and on the edge of the wetter beech forest and tussock covered mountains to the west and the drier tussock dominant landscapes to the east. The vegetation within the property reflects this transition and includes areas of montane beech forest, shrubland, sub-alpine scrub, tussockland and alpine plant associations. For the purposes of this landscape assessment Rees Valley Pastoral Lease is divided into three landscape units, reflecting areas of similar landscape character. For each landscape unit a description of landscape character is followed by a description of the key visual and scenic attributes. The inherent values of each landscape unit are then evaluated against the following criteria: 1. Intactness: the condition of the natural vegetation, patterns and processes, and the extent to which they are modified. 2. Legibility: the extent to which the landscape demonstrates its formative processes. 3. Aesthetic Factors: including distinctiveness (the quality that makes a particular landscape visually striking, such as when contrasting natural elements