Sloping Island Natural and Cultural Values Survey 2015
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Sloping Island Sloping Sloping Island natural and cultural values survey 2015 natural and cultural values survey and cultural 2015 natural A partnership program between the Hamish Saunders Memorial Trust, New Zealand and the Natural and Cultural Heritage Division, DPIPWE, Tasmania Department of Primary Industries, Parks, Water and Environment Sloping Island natural and cultural values survey 2015 A partnership program between the Hamish Saunders Memorial Trust, New Zealand and the Natural and Cultural Heritage Division, DPIPWE, Tasmania. © Department of Primary Industries, Parks, Water and Environment ISSN: 1441-0680 (print) ISSN: 1838-7403 (electronic) Cite as: Natural and Cultural Heritage Division (2016). Sloping Island natural and cultural values survey 2015. Hamish Saunders Memorial Trust, New Zealand and Natural and Cultural Heritage Division, DPIPWE, Hobart. Nature Conservation Report Series 16/1. Design and Layout: Land Tasmania Design Unit. Main cover photo: Permian mudstone shore platform north west coast of Sloping Island. Inside front cover photo: Looking west from Sloping Island across Frederick Henry Bay. Inside back cover photo: Navigation light on north western tip of Sloping Island. Unless otherwise credited, the copyright of all images remains with the Department of Primary Industries, Parks Water and Environment. Sloping Island natural and cultural values survey 2015 A partnership program between the Hamish Saunders Memorial Trust, New Zealand and the Natural and Cultural Heritage Division, DPIPWE, Tasmania 1 Contents Forward . 4 Hamish Saunders . 6 Acknowledgements . 7 Summary of key results . 7 Introduction . 10 Travel award recipient reports . 15 Natalie de Burgh . 15 Ella Imber Ireland . 19 Acronyms . 23 Aerial survey of Sloping Island . 24 Sloping Island: geology and geomorphology . 32 Soil investigations on Sloping Island . 44 Cavernous weathering in dolerite at Isle of Caves . 54 Sloping Island vegetation . 64 Weed management on Sloping Island . 80 Invertebrates of Sloping Island . 94 Vertebrate fauna of Sloping Island . 106 Sloping Island Short-tailed Shearwater survey . 122 Little Penguins on Sloping Island . 126 A lithic knapping floor on Sloping Island . 136 Sloping Island – Historic structures and features . 154 Hamish Saunders Memorial Island Survey Report • Sloping Island 3 Forward 4 Louise Wilson General Manager Natural and Cultural Heritage Division This report documents the results from the 2015 Hamish Saunders Memorial Trust survey to Sloping Island in Tasmania’s south east .The Trust’s mission is to nurture future leaders in the knowledge, conservation and management of marine (including island and coastal) environments .To this end the partnership between the Tasmanian Government and the Hamish Saunders Memorial Trust has again provided a unique opportunity for two young natural scientists to participate in a multidisciplinary scientific survey of one of Tasmania’s unique islands .There was a high level of interest by applicants for the two positions offered by the Trust. In a first for the program, the Trust selected one young scientist from Australia (Ella Imber Ireland) and one from New Zealand (Natalie de Burgh) . Previous surveys had only been open to New Zealand applicants . Both 2015 travel award recipients made the most of the trip to Sloping Island and the program provided them with valuable experience and opportunities in important conservation work across a range of disciplines working alongside Tasmanian specialists. In another first for the program, Aboriginal and historic heritage specialist staff from the Department of Primary Industries, Parks, Water and Environment (DPIPWE) took part in the survey, broadening the coverage of this island survey . Hamish Saunders Memorial Island Survey Report • Sloping Island 5 The 2015 survey has provided valuable natural and Hamish Saunders cultural heritage information that will not only be of general interest but specifically will be useful in Hamish Saunders was a New Zealander volunteer the ongoing management of Sloping Island by the who died tragically in 2003 while conducting survey Tasmanian Parks and Wildlife Service (PWS) as part work on a Tasmanian endangered species program . of Tasmania’s reserve system . Hamish graduated from Waikato University with a First Class Honours and Master degree in marine Since the Trust was established in 2005, ten island geology . He later completed a postgraduate GIS surveys have been undertaken . Previous surveys have course with distinction. He also achieved qualifications been conducted on: Tasman Island, Three Hummock as a scuba dive instructor, was a good sportsman and Island, Prime Seal Island, the islands of Macquarie was talented, not solely academically, but also as an Harbour, Inner Sister Island, Schouten Island, Flinders all-round individual . Island, South Bruny (and offshore islands) and lungtalanana (Clarke Island) . As an explorer, Hamish achieved in his 26 years much of which most only dream . From Antarctica to the Galapagos, Central America, South America, South-East Asia, Europe and Australia, he combined his passion for the natural world and conservation with that of an interest in local cultures and people . Not only did he travel to these places, but he also took a great interest in the people around him . He touched many lives . Hamish was a remarkable and talented young man .The passion and enthusiasm he engendered in those whom he met and the gentle leadership he embodied is his legacy . The island survey program is dedicated to the memory of Hamish Saunders and intended as a platform for emerging leaders in nature conservation . The Tasmanian Government’s commitment and long- term support for the program is reaffirmed in the publication of each of the expedition reports . For more information about Hamish and the Trust, visit http://www.hamishsaunders.com/ and past island survey reports http://dpipwe.tas.gov.au/conservation/ publications-forms-and-permits/publications/ nature-conservation-report-series/hamish-saunders- memorial-trust-island-survey-reports 6 Acknowledgements Summary of key results Thanks are due to the Hamish Saunders Memorial The Sloping Island survey covered a range of subject Trust for participating in the program, particularly areas and significantly added to the knowledge of Alan and David Saunders, and the Trust’s travel award both the natural and cultural values of the island and recipients, Natalie de Burgh and Ella Imber Ireland this work will prove useful in managing the reserve . who took part in the 2015 Sloping Island survey . The use of a Remotely Piloted Aircraft System to The Parks and Wildlife Service (PWS) provided obtain high resolution aerial imagery prior to the field boat transport to and from the island and this is survey on Sloping Island proved extremely useful in greatly appreciated . Mark Monks, Peter Bird and both planning for and conducting on ground field Peter Feil, all from the Seven Mile Beach PWS field work across a range of disciplines .The use of such centre operated the boat and safely transported technology is likely to play an increasing role in natural personal and gear on and off the island .The Marine and cultural surveys into the future . Conservation Team of DPIPWE facilitated transport The geology and geomorphology of the island were to the Isle of Caves . briefly surveyed with a subsequent revision to the Jane McGee and Peter Voller provided agency Tasmanian Geoconservation Database recommended support .The DPIPWE Hamish Saunders Steering and the stability of the aeolian sands identified as a Committee is thanked for assisting in the team potential management issue .The soils of Sloping Island selection . were mapped in detail and comprised three broad soil types . Detail descriptions and mapping of the We thank the many people who provided their time unusual cave formations on the Isle of Caves (3 .8 km and expertise, some in a volunteer capacity, across the north of Sloping Island) was undertaken for the first range of specialties dealt with in the report . time . The editor especially thanks participants for writing up The resolution and reliability of the vegetation the results of the survey in a timely manner .Thanks to mapping of Sloping Island was greatly improved with Brett Littleton from the Land Tasmania Division for his a total of 12 TASVEG communities mapped, including design and layout of the report . three threatened communities. A vascular flora Finally, a big thank you to all those who participated in species list for the island was comprised listing some the island survey and who were lucky enough to visit 143 species . Sloping Island as part of the program . Mapping of the populations of three listed weed species, serrated tussock, African boxthorn and Spanish heath, was undertaken and it was found that weed management on Sloping Island is at a critical juncture and it is recommended that a coordinated management approach of the three species is undertaken with adequate resourcing . Stability of the aeolian sands that cover the island is Hamish Saunders Memorial Island Survey Report • Sloping Island 7 dependent upon maintenance of good vegetation Short-tailed Shearwater colonies were found to cover and this should be considered in any fire and have increased by 3 .6 ha and 10,200 burrows over weed management planning on the island . the last 20 to 40 years . Serrated tussock and African boxthorn are present in and adjacent to shearwater The terrestrial invertebrate fauna of Sloping