NSW Native vegetation report Cobbora, Coolah, Coonabarabran, Mendooran, Tambar Springs 1: 100 000 map sheets VIS_ID 2101

Native vegetation is described and mapped for the Cobbora, Coolah, Coonabarabran, Mendooran and Tambar Springs 1: 100 000 map sheets. Vegetation patterns were recognised and delineated spatially using air photo interpretation (1:50,000 ). Satellite imagery was used to geo-reference the API. A consistent provisional vegetation code was assigned to each unique vegetation pattern. Comprehensive floristic data was collected for 547 plots using a random stratified sampling procedure. A proportional sampling regime was applied to the stratification and plots randomly located within stratification units independent of land tenure. An additional mask layer was applied to distinguish between 'woody' and 'non-woody' vegetation to target survey effort toward wooded communities.\r\n\r\nPlot data was classified into 44 woody floristic groups using PATN. Additional analysis techniques included fidelity, homogeneity, nearest neighbour and indicator species analysis. Floristic groups are defined using structural dominance, diagnostic/indicator species and character species data. The provisional vegetation pattern codes from aerial photo interpretation were interrogated with respect to floristic groups to produce the map units. A generalised, additive model was used to investigate patterns in ironbark/redgum/pine assemblages in the south of the study area, where direct relationships between spatial and floristic data were unclear.\r\n\r\nA total of 24 woody map units were developed to represent woody assemblages and three map units spatially depict non-woody areas, non-native areas and regenerating vegetation (at time of mapping). These map units are described with respect to structure, floristic composition and landform unit on the accompanying five maps. Mapping of the non-woody environment was limited to recognising 'candidate' native non-woody vegetation. (VIS_ID 2101)

本数据集针对Cobbora、Coolah、Coonabarabran、Mendooran及Tambar Springs五幅1:100 000比例尺地形图的覆盖范围，开展原生植被的描述与制图工作。研究采用1:50 000比例尺航空像片解译（Air Photo Interpretation, 简称API）技术，对植被空间分布格局进行识别与勾绘；并借助卫星影像对API结果进行地理配准。为每个独特的植被分布格局赋予统一的暂定植被编码。研究采用随机分层抽样方案，按分层比例实施采样，在各分层单元内独立于土地权属随机布设547个样地，收集全面的区系数据。此外，额外增设掩膜图层以区分木本植被与非木本植被，从而将调查工作重点聚焦于木本植物群落。

利用PATN软件将样地数据划分为44个木本区系群。后续分析采用了物种保真度、群落同质性、最近邻体分析及指示物种分析等技术手段。木本区系群的定义基于结构优势度、诊断/指示物种及特征物种数据。将航空像片解译得到的暂定植被格局编码与区系群进行匹配比对，最终生成制图单元。针对研究区南部因空间数据与区系数据间直接关联尚不明确的铁桉/红桉/松类组合，研究采用广义加性模型开展分布格局分析。

最终共生成24个木本制图单元以表征木本植物群落，另设置3个制图单元分别用于标注非木本区域、非原生植被区域及制图时处于恢复阶段的植被。配套的五幅地图将针对每个制图单元，从结构、区系组成及地貌单元三个维度进行详细描述。非木本环境的制图仅限定于识别‘候选’原生非木本植被。（数据集VIS_ID：2101）