Ironbark Nature Reserve Vegetation 2002 VIS_ID 4740

Ironbark Nature Reserve and the Bornhardtia Voluntary Conservation Area vegetation mapping was undertaken by Dr John T. Hunter in 2002 by contract for the NPWS Northern Tableland Region. (Bornhardtia VCA vegetation map is now a separate dataset). Ironbark Nature Reserve and the Bornhardtia VCA are located on the Northern Tablelands 30 km east north east of Barraba and 75 km north west of Armidale. Ironbark Nature Reserve was gazetted on the 29 of November 1985. The original gazetted area included only 1230 ha however an additional 373 ha purchased in 1988 to the east that incorporated a significant Aboriginal site. The Bornhardtia VCA was subdivided and purchased from Granite Heights in November 1997.\r\n\r\nThe vegetation of Ironbark NR and the Bornhardtia VCA is described and mapped (scale 1:25 000). Eleven communities are defined based on PATN analysis with further sub-assemblages are described. These eleven communities were mapped based on ground truthing, air photo interpretation and landform. One community is listed as Endangered on state and federal acts, three are considered here to be vulnerable and all others are considered to be poorly or inadequately reserved across their range. Most communities are of woodland and open forest structure. The communities show considerable variation and intergrade along common boundaries and in particular on intermediate soil types. Drainage, easting, soil depth, physiography and protection from the north were the major correlative influence on community distribution, however northing and rock type were also strongly correlated.\r\n\r\nVIS_ID 4740

铁木桉自然保护区（Ironbark Nature Reserve）与博恩哈迪亚自愿保护区域（Bornhardtia Voluntary Conservation Area）的植被测绘工作由John T. Hunter博士于2002年受国家公园与野生动物服务局（National Parks and Wildlife Service, NPWS）北部台地区域委托开展。（注：博恩哈迪亚自愿保护区域植被测绘数据集现已独立为单独数据集）。铁木桉自然保护区与博恩哈迪亚自愿保护区域地处澳大利亚北部台地，位于巴拉巴（Barraba）东北偏东30公里、阿米代尔（Armidale）西北偏北75公里处。铁木桉自然保护区于1985年11月29日正式公告设立，初始公告的保护区面积仅为1230公顷，后于1988年收购东侧新增的373公顷区域，该区域包含一处重要的原住民遗址。博恩哈迪亚自愿保护区域于1997年11月从Granite Heights收购并完成细分。

本数据集对铁木桉自然保护区与博恩哈迪亚自愿保护区域的植被进行了系统描述与测绘，测绘比例尺为1:25000。研究基于PATN分析划定11个植被群落，并对各群落的子组合开展了进一步描述。上述11个群落通过实地地面验证、航空影像解译结合地形地貌特征完成测绘。其中1个群落被列入州级与联邦级濒危保护法案，3个群落被认定为易危群落，其余群落的分布范围均存在保护不足或保护不充分的问题。多数群落呈现林地与开放森林的结构特征，各群落在公共边界区域尤其是过渡性土壤类型分布区存在显著的渐变与混交现象。影响群落分布的主要相关环境因子包括排水条件、东向方位、土壤深度、地貌特征以及北向遮蔽，而北向坐标与岩石类型也与群落分布呈现显著相关性。

VIS_ID 4740