NVIS 4.1 Major Vegetation Subgroups

Eighty-five (85) Major Vegetation Subgroups identified in v4.1 to summarise the type and distribution of Australia's native vegetation. The classification contains an emphasis on the structural and floristic composition of the dominant stratum (as with Major Vegetation Groups), but with additional types identified according to typical shrub or ground layers occurring with a dominant tree or shrub stratum. In a mapping sense, the subgroups reflect the dominant vegetation occurring in a map unit from a mix of several vegetation types. Less-dominant vegetation groups which are also present in the map unit are not shown. For example, the dominant vegetation in an area may be mapped as dominated by eucalypt open forest with a shrubby understorey, although it contains pockets of rainforest, shrubland and grassland vegetation as subdominants.

本数据集v4.1版本共包含85个主要植被亚组（Major Vegetation Subgroups），用于概括澳大利亚本土植被的类型与分布特征。该分类体系重点关注优势层的结构与区系组成（与主要植被群（Major Vegetation Groups）的分类原则一致），同时还会依据与优势乔木层或灌木层伴生的典型灌丛或地被层特征，新增部分植被类型。从制图视角来看，植被亚组所反映的是某一制图单元内由多种植被类型混合形成的优势植被类型，而该制图单元中存在的次要优势植被群则不会被标注。例如，某区域的优势植被可能被制图为桉属疏林并带有灌丛下层，尽管该区域内还存在小片雨林、灌丛与草原植被作为次要优势类型。