|Scientific Name:||Callitris oblonga|
|Species Authority:||Rich. & A.Rich.|
|Taxonomic Notes:||Three subpsecies are currently recognised in Australian floras and on national and state lists of threatened plants. Callitris oblonga ssp parva K.D. Hill is restricted to a few localities in the New England Tablelands in northern New South Wales. C. oblonga ssp corangensis K.D. Hill is restricted to the Corang River catchment in the southern tablelands in souther New South Wales. C. oblonga ssp oblonga is restricted to northeast Tasmania. Only one taxon is recognised on the IUCN Redlist.|
|Red List Category & Criteria:||Vulnerable B1ab(iii) ver 3.1|
The estimated extent of occurrence (EOO) for Callitris oblonga is 5,835 km2 based on recent herbarium specimens. This is a cumulative total from each area (Northern Tablelands: 4,700 km2; Southern Tablelands: 12 km2; Tasmania: 1,123 km2). Although the area of occupancy has not been calculated, it is likely to be less than 500 km2 as subpopulations are relatively small and localised. Despite the great geographic disjunctions between the three main areas, individual subpopulations are not considered severely fragmented in the IUCN context. Nine locations have been identified based on common threats within geographical areas. In some parts of the range there is a continuing decline in quality of habitat due to the impact of exotic weeds, feral animals and habitat conversion.On this basis, C. oblonga is listed as Vulnerable under Criterion B.
|Range Description:||Callitris oblonga occurs in three widely separated areas. In northern New South Wales it is found in a few localities in the New England Tablelands at altitudes ranging from 800 to 1,300 m asl. In southern New South Wales, (over 500 km south) there is a single locality along the Corang River at altitudes ranging from 570 to 630 m asl. In Tasmania, over 800 km further south, it is restricted to two small areas in the northeast part of the state at altitudes ranging from 10 to 230 m asl. No intervening localities have been recorded. The estimated extent of occurrence (EOO) is 5,835 km2, based on recent herbarium specimens. This EOO is a cumulative total from each area (Northern Tablelands: 4,700 km2; Southern Tablelands: 12 km2; Tasmania: 1,123 km2). In Tasmania the EOO includes an outlying locality more than 60 km from any other locality: the actual area of occupancy is estimated to be as little as 448 hectares. Its overall area of occupancy has not been calculated but it is certainly less than 500 km2 as the New South Wales subpopulations are small and localized.|
Native:Australia (New South Wales, Tasmania)
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Overall population size is unknown although in Tasmania there are estimated to be 3,000-4,000 individuals. Although floods and fires may eliminate mature individuals, most subpopulations regenerate in the absence of competition from exotic weeds, feral animals and overgrazing.|
|Habitat and Ecology:||A tall shrub or small tree. In NSW it occurs along sandy watercourses, shrubland, open woodland in granite country, and dry sites, such as exposed ridges at relatively high altitudes. In Tasmania, it occurs much closer to sea level, in scattered stands along creeks and rivers. Throughout its range it is fire sensitive: mature individuals are usually killed but there may be substantial regeneration from the release of seed contained within the serotinous cones in the canopy. In northern New South Wales, fire intervals of at least 11 years are required to allow regeneration (Clarke 2009). Regeneration may also occur after flooding. Seedlings are shade intolerant and require open ground for establishment.|
|Major Threat(s):||Primary threats include clearing, degradation and fragmentation of habitat for agriculture; frequent fire; grazing by domestic stock, rabbits (Oryctolagus cuniculus) and feral goats (Capra hircus); weed invasion, particularly by Blackberry (Rubus fruticosus), Broom (Cytisus sp.) and Gorse (Ulex europaeus); destruction and disturbance of habitat for road works and roadside maintenance activities and erosion through removal of streamside vegetation (Threatened Species Unit 2004; Threatened Species Scientific Committee 2007). In northeast Tasmania temperature rise and changes to rainfall and other climatic factors associated with anthropogenic climate change is predicted to affect the environmental range of the community in which C. oblonga occurs as well as increasing the risk of stochastic events such as fire and flood (Threatened Species Unit 2004).|
At a federal level, C. oblonga is listed as Vulnerable under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). Prior to this it was also listed as Vulnerable under Schedule 1 of the Endangered Species Protection Act 1992. In New South Wales the species is listed as Vulnerable on the Threatened Species Conservation Act 1995 (NSW) while in Tasmania the subspecies Callitris oblonga subsp. oblonga is listed as Endangered on the EPBC Act and as Vulnerable on the Threatened Species Protection Act 1995 (Tasmania). In addition to these listings, the Eucalyptus ovata - C. oblonga forest ecological community in Tasmania is listed as Endangered under the federal Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). In New South Wales subpopulations that occur within the Montane Peatlands and Swamps of the New England Tableland, NSW North Coast, Sydney Basin, South East Corner, South Eastern Highlands and Australian Alps bioregions have been listed as an Endangered ecological community under state legislation. Listing under the various state and federal laws requires that monitoring and recovery plans are designed and put into place. These plans involve a range of strategies and actions to counter the main threats from exotic weeds and animals, clearing of vegetation and inappropriate fire regimes.
In Tasmania C. oblonga is known from the Douglas Apsley National Park. In other areas, some stands are under either local government protection or are subject to conservation covenant agreements with local landowners. Addtionally there is a moratorium on any further clearing of the threatened forest community in which it occurs (Threatened Species Unit 2004). In New South Wales, two subpopulations are known from within Werrikimbe and Guy Fawkes National Parks. While most are on private land, many of these are subject to conservation covenant agreements.
|Citation:||Thomas, P. 2013. Callitris oblonga. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 09 March 2014.|
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