Reconstructed Distribution and Extent of Native Vegetation within the Lower Macquarie-Castlereagh Region VIS_ID 817

Existing Vegetation Map of Lower Macquarie-Castlereagh Region.;\r\nVegetation Map from M. Kerr, A. Jowett & R. Robson. Unpublished. Reconstructed Distribution and Extent of Native Vegetation within the Lower Macquarie-Castlereagh Region. Two maps were produced:;\r\n;\r\n1. Reconstructed vegetation showing the probable full extent of vegetation coverage in the region and ;\r\n2. An approximation of the existing vegetation, allocated to four current landuse categories: managed for conservation, uncleared and grazde, cleared and grazed and recently cultivated.;\r\n;\r\nTwo key outputs were a regional reconstructed vegetation map (commonly termed ""pre-clearing"" map) and a map depicting existing vegetation coverage. For the purposes of this project, reconstructed vegetation was defined as native vegetation that is likely to have occurred on currently cleared or highly modified land, as extrapolated from existing vegetation, such that ecological processes and function are broadly reflected. Ten datasets were used as a basis for the development of the reconstructed map, which was developed through subjective analysis of vegetation groups described and mapped by existing studies. A further five GIS layers were used to determine the extent of recent cultivation in the RVMP area and current extent of woody vegetation. Thirty-six broad vegetation types were identified from the existing data, and grouped into fifteen vegetation associations. Each broad vegetation type is described in terms of dominant species, variation in structure, common associated native and introduced species, and its relationship with soils and landform. An indication of the regional reservation of each broad vegetation type is also provided. (VIS_ID 817)下麦夸里-卡斯尔雷（Lower Macquarie-Castlereagh）地区现有植被图； 该植被图源自M. Kerr、A. Jowett与R. Robson的未出版研究《下麦夸里-卡斯尔雷地区原生植被的重建分布与范围》。本次研究共制作两幅地图： 1. 重建植被图：展示该区域原生植被的理论完整覆盖范围； 2. 现有植被近似图：依据四类当前土地利用类别进行划分，分别为保护管理用地、未清理且放牧用地、已清理且放牧用地以及近期耕作用地。 本项目的两项核心产出分别为区域重建植被图（通常被称为"清理前"植被图）与现有植被覆盖范围图。本项目中，重建植被被定义为：基于现有植被外推得到的、原本可能分布于当前已清理或高度改造土地上的原生植被，以此大致反映区域生态过程与功能。 重建植被图的编制以10份数据集为基础，通过对现有研究中描述并绘制的植被群进行主观分析完成。另有5个地理信息系统（Geographic Information System, GIS）图层，用于确定RVMP区域内近期耕作的范围以及当前木本植被的分布范围。 研究从现有数据中识别出36种广义植被类型，并将其归为15个植被群丛。每种广义植被类型均配有详细描述，涵盖优势物种、群落结构变异、常见伴生原生与外来物种，以及其与土壤和地貌的关联关系。同时还提供了各广义植被类型的区域保护现状相关信息。（VIS_ID 817）