NSW Native vegetation report Cobbora, Coolah, Coonabarabran, Mendooran, Tambar Springs 1: 100 000 map sheets VIS_ID 2102

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 scale). 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 2102)

本数据集针对Cobbora、Coolah、Coonabarabran、Mendooran及Tambar Springs共5幅1:100000比例尺地形图幅开展原生植被描述与制图工作。研究采用1:50000比例尺航空像片解译（air photo interpretation，以下简称API）技术，识别并勾绘植被空间分布格局；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单元赋予统一的临时植被编码。本研究采用随机分层抽样方案，分层过程遵循比例抽样策略，且在各分层单元内独立于土地权属随机布设样地，最终完成547个样地的完整区系数据采集。此外增设掩膜图层以区分木本（woody）与非木本（non-woody）植被，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个木本区系类群；后续分析涵盖保真度分析、均匀度分析、最近邻分析及指示物种分析等方法。木本区系类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临时植被格局编码与区系类群进行匹配，最终生成制图单元。针对研究区南部铁桉/红桉/松类组合的空间分布与区系数据关联不明确的问题，本研究采用广义可加模型（generalised additive model）探究其分布规律。

本研究共生成24个木本制图单元以表征木本植物群落，另设3个制图单元分别对应非木本区域、非原生植被区域及制图时的更新恢复植被。上述制图单元均结合结构特征、区系组成及地貌单元进行描述，并附于配套的5幅地形图中。非木本植被的制图仅限定为识别“候选”原生非木本植被。（VIS_ID 2102）