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

2002年，约翰·T·亨特博士受合同委托，为国家公园与野生动物服务局（NPWS）北部台地区域完成了Ironbark自然保护区（Ironbark Nature Reserve）与Bornhardtia自愿保护区（Bornhardtia Voluntary Conservation Area）的植被制图工作。（Bornhardtia VCA植被图现已作为独立数据集发布）。Ironbark自然保护区与Bornhardtia自愿保护区坐落于北部台地区域，距离巴拉巴（Barraba）东北偏东30公里、阿米代尔（Armidale）西北偏北75公里处。

Ironbark自然保护区于1985年11月29日正式公告设立。最初公告的保护区面积仅为1230公顷，1988年又在其东侧购入额外373公顷土地，该区域包含一处重要的原住民遗址。Bornhardtia VCA于1997年11月从花岗岩高地（Granite Heights）拆分并收购。

本次研究对Ironbark自然保护区与Bornhardtia VCA的植被进行了系统描述与制图，制图比例尺为1:25000。研究基于PATN分析划定了11个植被群落，并对其下的次级组合单元进行了详细描述。该11个植被群落的制图工作依托地面实况调查、航空照片解译以及地形地貌特征开展。其中1个群落被州级与联邦法案列为濒危物种，3个群落被认定为易危物种，其余所有群落在其分布范围内均未得到充分或妥善的保护。多数群落呈现疏林与开放式森林的结构特征。各植被群落间存在显著分异，且在共同边界处，尤其是过渡性土壤类型区域，呈现出明显的群落嵌合过渡现象。排水条件、东向方位、土壤深度、地貌特征以及北向遮蔽条件是影响群落分布的主要相关因素，而北向位置与岩石类型也与群落分布存在显著相关性。

VIS_ID 4740