2020 Conservation Outlook Assessment
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IUCN World Heritage Outlook: https://worldheritageoutlook.iucn.org/ Gondwana Rainforests of Australia - 2020 Conservation Outlook Assessment Gondwana Rainforests of Australia 2020 Conservation Outlook Assessment SITE INFORMATION Country: Australia Inscribed in: 1986 Criteria: (viii) (ix) (x) This site, comprising several protected areas, is situated predominantly along the Great Escarpment on Australia’s east coast. The outstanding geological features displayed around shield volcanic craters and the high number of rare and threatened rainforest species are of international significance for science and conservation. © UNESCO SUMMARY 2020 Conservation Outlook Finalised on 02 Dec 2020 SIGNIFICANT CONCERN The Gondwana Rainforests of Australia is a serial World Heritage site composed of 41 component national parks and reserves in New South Wales and Queensland, ranging in size from 10 hectares to 102,712 hectares. Each of the component areas conserves different attributes of the site's Outstanding Universal Value, and are faced with a diversity of threats. While management has so far been effective in addressing challenges, further management responses will be required to address some increasing threats, particularly those posed by wildfire, invasive species, pathogens, and climate change. A significant management challenge occurred in the Austral spring and summer of 2019-2020, when a prolonged drought that was exacerbated by record breaking temperatures and rainfall deficits culminated in extensive and severe wildfires. Management responses to this catastrophic event are considerable, and on- going, but given the severe nature and extent of the fires even the significant resources and even well- planned and completed hazard reduction burns conducted in the previous autumn and winter season were ineffective. There are several government inquires into the causes and responses to the fires. The fires dramatically changed the conservation outlook for the Gondwana Rainforest of Australia, and it remains to be seen whether the natural ecosystems and ecological functions are sufficiently resilient to recover from this previously unexperienced perturbation. Actions are in place to make rapid assessments of the levels of impacts, to undertake welfare for threatened species, to limit the impact of invasive predators and weeds, and for some plants for seeds to be collected for future propagation. There is wide recognition that considerable conservation actions will be required. However, there is the lingering prospect that the catastrophe is a clear sign of the impact of climate change on weather patterns, and that these changes will not be reversed easily. The Gondwana Rainforests exist as refuges where many deep phylogenetic lineages IUCN World Heritage Outlook: https://worldheritageoutlook.iucn.org/ Gondwana Rainforests of Australia - 2020 Conservation Outlook Assessment persisted during episodes of past climate fluctuations. The conservation management challenge is to support and maintain that resilience into the future. IUCN World Heritage Outlook: https://worldheritageoutlook.iucn.org/ Gondwana Rainforests of Australia - 2020 Conservation Outlook Assessment FULL ASSESSMENT Description of values Values World Heritage values ▶ Outstanding examples of significant ongoing geological Criterion:(viii) processes When Australia separated from Antarctica following the break-up of Gondwana, new continental margins developed and volcanoes erupted in sequence along the east coast resulting in the Main Range, Tweed, Focal Peak, Ebor and Barrington volcanic shields. This sequence of volcanos is significant as it enables the dating of the geomorphic evolution of eastern Australia through the study of the interaction of these volcanic remnants with the eastern highlands. The Tweed Shield erosion caldera is possibly the best preserved erosion caldera in the world, notable for its size and age, for the presence of a prominent central mountain mass (Wollumbin/Mt Warning), and for the erosion of the caldera floor to basement rock. All three stages relating to the erosion of shield volcanoes (the planeze, residual and skeletal stages) are readily distinguishable. Further south, the remnants of the Ebor Volcano also provide an outstanding example of the ongoing erosion of a shield volcano (World Heritage Committee, 2012). ▶ Outstanding examples of relict plant species Criterion:(ix) The Age of the Pteridophytes’ from the Carboniferous Period (with some of the oldest elements of the world’s ferns), and the ‘Age of Conifers’ in the Jurassic Period (with one of the most significant centres of survival for Araucarians, the most ancient and phylogenetically primitive of the world’s conifers) are represented in the site. The site also provides an outstanding record of the ‘Age of the Angiosperms’. This includes a centre of endemism for primitive flowering plants originating in the Early Cretaceous, the most diverse assemblage of relict angiosperm taxa representing the primary radiation of dicotyledons in the mid-Late Cretaceous, a unique record of the evolutionary history of Australian rainforests representing the ‘golden age’ of the Early Tertiary, and a unique record of Miocene vegetation that was the antecedent of modern temperate rainforests in Australia (World Heritage Committee, 2012). ▶ Outstanding examples of relict and other vertebrate and Criterion:(ix) invertebrate species The site contains an outstanding number of songbird species, including lyrebirds (Menuridae), scrub- birds (Atrichornithidae), treecreepers (Climacteridae) and bowerbirds and catbirds (Ptilonorhynchidae), belonging to some of the oldest lineages of passerines that evolved in the Late Cretaceous. Outstanding examples of other relict vertebrate and invertebrate fauna from ancient lineages linked to the break-up of Gondwana also occur in the site (World Heritage Committee, 2012). Relict frogs include all frogs in Myobatrachidae (recently subdivided into Myobatrachidae and Limnodynastidae, with some authors recognising a third family Rheobatrachidae (Frost et. al., 2014)) and Pelodryadidae families. Relict species of reptiles include chelid turtles Emydura macquarii signata and Myuchelys latisternum, leaf- tailed gecko (Saltuarius spp.) and the southern angle-headed dragon Lophosaurus spinipes. Relict invertebrates include fresh-water crayfish; land snails; velvet worms; a number of beetle families including flightless carabid beetles; the second largest butterfly in Australia the Richmond birdwing (Ornithoptera richmondia) and glow-worms (State Party of Australia, 1994; Hunter, 2004). ▶ Outstanding examples of ongoing evolutionary processes Criterion:(ix) Ongoing evolutionary processes continue within the site’s rainforests which were described in the nomination dossier as ‘an archipelago of refugia, a series of distinctive habitats that characterise a temporary endpoint in climatic and geomorphological evolution’. The distances between these ‘islands’ IUCN World Heritage Outlook: https://worldheritageoutlook.iucn.org/ Gondwana Rainforests of Australia - 2020 Conservation Outlook Assessment of rainforest represent barriers to the flow of genetic material for those taxa which have low dispersal ability, and this pressure has created the potential for continued speciation (World Heritage Committee, 2012). Several important phylogeograhic papers have appeared that address the “archipelago” and the consequences for gene flow and speciation (eg. Bryant and Krosch, 2016). ▶ Endemic and threatened plants Criterion:(x) The Gondwana Rainforests protects the largest and best stands of rainforest habitat remaining in this region, containing many endemic and threatened plant species. Over 170 families, 695 genera and 1625 species of vascular plants have been recorded, with about 150 endemics (World Heritage Committee, 2012). Given new discoveries and more recent taxonomic changes, these figures are likely to be higher. ▶ Endemic and threatened mammals Criterion:(x) The Gondwana Rainforests protects endemic and threatened mammals such as the recently-discovered black-tailed antechinus Antechinus arktos. This species is known from three isolated subpopulations located at the summit of the Tweed Shield Volcano caldera near the border of south-east Queensland and north-east New South Wales, at altitudes above 950 m above sea level (asl) (Threatened Species Scientific Committee, 2017). This area is part of the Springbrook National Park and Lamington National Park in Queensland, and the Border Ranges National Park in New South Wales. The region represents the major distribution of the Hastings River mouse Pseudomys oralis and parma wallaby Macropus parma). Thirty-one species of bats, half of all Australia’s bat species, occur in the site (IUCN, 1994; World Heritage Committee, 2012). ▶ Endemic and threatened birds Criterion:(x) More than 270 species of birds have been recorded (about 38% of all Australian birds) with two species of lyrebirds (Albert’s lyrebird Menura alberti and superb lyrebird M. novaehollandiae) and the nationally endangered rufous scrub-bird (Atrichornis rufescens) particularly significant. Other threatened bird species include the Coxen's fig-parrot (Cyclopsitta diophthalma coxeni) (probably extinct), black- breasted button-quail (Turnix melanogaster) and eastern bristlebird (Dasyornis brachypterus) (State Party of Australia, 1994). ▶ Endemic and threatened frogs Criterion:(x) Some 45 species of frogs, about 25% of Australia’s total frog fauna, including the significant species