Reconstructed Distribution and Extent of Native Vegetation within the Lower Macquarie-Castlereagh Region VIS_ID 816

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 Unpublished.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 816)

下麦夸里-卡斯尔雷地区现存植被地图。本数据集为M. Kerr、A. Jowett与R. Robson编制的未出版植被地图，主题为下麦夸里-卡斯尔雷地区本土植被的重建分布与覆盖范围。本次研究共制作两幅地图：
1. 重建植被地图：展示该区域植被覆盖的潜在完整范围；
2. 现存植被近似地图：基于四类当前土地利用类型进行分类，具体包括保护管理用地、未清理放牧用地、已清理放牧用地以及近期耕作用地。

本次研究的两项核心成果分别为区域重建植被地图（通常称为"清理前"地图）与现存植被覆盖范围地图。本项目将重建植被定义为：基于现存植被外推得到的、原本可能分布于当前已清理或高度改造土地上的本土植被，以大体还原区域生态过程与功能。重建植被地图的编制以10个数据集为基础，通过对已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区域内的近期耕作范围与当前木本植被的覆盖范围。研究从现有数据中识别出36类广义植被类型，并将其归并为15个植被群丛。每一类广义植被类型均从优势物种、结构差异、常见伴生本土与外来物种，以及其与土壤和地貌的关联等维度进行描述。同时还提供了每一类广义植被类型的区域保护现状说明。（VIS_ID 816）