Vegetation survey of Ginghet Nature Reserve. VIS_ID 3975

The composition and extent of the present vegetation within Ginghet Nature Reserve (former property Wyninebah) is described and mapped by Porteners (2010). Twenty-five quadrat-based sites were sampled, with intensive field traverses, opportunistic sampling and aerial photograph interpretation. The survey sites were selected using stratified random sampling with replication where possible within the attribute class. The sites were distributed primarily to reflect the geomorphological gradients and soil changes across the study area, and to a lesser extent the structural variation of the vegetation. The data were then analysed using PATN multivariate analysis and identified five vegetation communities. 136 taxa of vascular plants were recorded from 36 families, eight of which are considered to be regionally significant. At each site, all vascular plant species were recorded within 20 by 20 metre (0.04 hectare) quadrats, and assigned a cover abundance rating based on a modified Braun-Blanquet six-point scale (Poore 1955). Bryophytes were not included in the survey. Vegetation structure was described by measuring the height and canopy cover of the dominant species in each stratum. Physiographic data additional to those defined by the stratification were also recorded, including soil type, landform, fire history and disturbance. All sites were located using a GPS, photographed and nested from the south-west corner Vegetation communities were mapped using colour aerial photographs at approximately 1: 50 000 scale (runs dated 3rd April 2005). The air photos formed the basis of the vegetation map polygons, supplemented by various orthophoto, SPOT satellite and other GIS layers. The photos were interpreted stereoscopically for patterns of vegetation and geomorphology, and then matched to the vegetation site data via direct visual assignment of floristic group attributes on the remote imagery. A provisional vegetation map was drafted and the study area traversed, with particular sites investigated to confirm polygon labels and resolve vegetation boundaries. The final vegetation polygons were transferred and visually corrected (orthorectified) to the orthophoto map and coded, ready for digitising into the GIS. The final vegetation map was digitised by DECCW Scientific Services (Dubbo) using ArcGIS.\r\n\r\nVIS_ID 3975

Ginghet自然保护区（原Wyninebah地块）内现存植被的组成与分布范围已由Porteners（2010）完成系统描述与专题制图。本研究共布设25个基于样方的调查样地，辅以密集野外踏勘、偶遇取样与航空影像解译工作。调查样地采用分层随机抽样法选取，尽可能在属性类别内设置重复样地；样地布设主要以反映研究区内地貌梯度与土壤变化为核心目标，同时兼顾植被的结构变异（该部分权重相对较低）。随后采用PATN多元分析法（PATN multivariate analysis）对调查数据开展统计分析，共识别出5个植被群落。本调查共记录到36科136种维管植物，其中8个类群被认定为具有区域重要性。在每个样地内的20m×20m（0.04公顷）样方中，调查人员记录了所有维管植物物种，并基于改良的Braun-Blanquet六级盖度多度等级（Braun-Blanquet six-point scale，Poore 1955）对各物种的盖度与多度进行赋值。本次调查未纳入苔藓植物。植被结构通过测量各植被层优势种的高度与冠层盖度进行描述。除分层调查预设的因子外，研究人员还记录了其他地貌物理数据，包括土壤类型、地貌类型、火烧历史与人为干扰情况。所有样地均通过全球定位系统（Global Positioning System, GPS）定位、拍摄现场照片，并以西南角为基准完成样方的布设定位。植被群落基于比例尺约1:50000的彩色航空影像开展解译与制图，该批次航片的拍摄日期为2005年4月3日。航空影像作为植被图斑的基础底图，辅以各类正射影像、SPOT卫星影像及其他地理信息系统（GIS）图层。研究人员通过立体目视解译识别植被与地貌格局，并通过直接在遥感影像上赋予植物群落组属性的方式，将影像解译结果与野外调查样地数据进行匹配。随后草拟了初步植被图，并遍历整个研究区域，对典型样地开展实地核查以确认图斑标注并厘清植被边界。最终植被图斑被导入正射影像底图并进行目视校正（正射校正）与编码，以待录入地理信息系统（GIS）。最终植被图由DECCW科学服务部（达博分部）使用ArcGIS软件完成数字化。VIS_ID 3975