Hornsby Local Government Area Threatened Ecological Communities, 2008. VIS_ID 4470

Updated mapping of Threatened Ecological Communities (TECs). \r\nThe native vegetation communities of Hornsby Shire were originally identified and mapped in 1990-1993. The present study updates the classification and mapping of 30 communities, with the updated mapping provided in digital form for inclusion in the council's GIS. The survey area included all of the Hornsby LGA, from Eastwood to Brooklyn to Wisemans Ferry, excluding Marramarra NP, Muogamarra NR, Long Island NR, and Ku-ring-gai Chase NP east of the Sydney-Newcastle Freeway.\r\n\r\nIn the initial study, the classification of the plant communities was based on the floristic composition of the tallest vegetation layer (usually the tree species composition). The assessment was subjective but based on species data from a total of 404 sample sites. An additional 209 sites were examined for the updated study. The classification has been refined to include 8 EECs, two rainforest communities (instead of one in the original classification), and recognition of the distinctive vegetation of Dangar Island as a separate community. VIS_ID 4470\r\n\r\nPlease note the related datasets:\r\n1. Hornsby Local Government Area Vegetation Communities, 2008. VIS_ID 4471\r\n2. Hornsby Local Government Area Remnant Trees, 2008. VIS_ID 4472

受威胁生态群落（Threatened Ecological Communities, TECs）更新测绘数据集。
霍恩斯比郡（Hornsby Shire）的本土植被群落最初于1990-1993年完成识别与测绘。本研究对30个植被群落的分类与测绘成果进行了更新，更新后的测绘数据以数字化形式提供，可纳入市政委员会的地理信息系统（Geographic Information System, GIS）。本次调查覆盖霍恩斯比地方政府辖区（Local Government Area, LGA）全域，范围从伊斯特伍德（Eastwood）至布鲁克林（Brooklyn）再到怀斯曼斯费里（Wisemans Ferry），排除了悉尼-纽卡斯尔高速公路以东的马拉马拉国家公园（Marramarra NP）、穆奥加马拉自然保护区（Muogamarra NR）、长岛自然保护区（Long Island NR）以及昆宁盖蔡斯国家公园（Ku-ring-gai Chase NP）。

在初始研究中，植物群落的分类依据为最高植被层的区系组成（通常为乔木物种组成）。该评估具有主观性，但基于总计404个采样点的物种数据完成。本次更新研究额外调研了209个采样点。本次研究对分类体系进行了优化，新增纳入8个濒危生态群落（Endangered Ecological Communities, EECs）、2个雨林群落（原分类体系中仅包含1个雨林群落），并将丹格岛（Dangar Island）的特色植被认定为独立群落。VIS_ID 4470

请注意以下相关数据集：
1. 《2008年霍恩斯比地方政府辖区植被群落》（VIS_ID 4471）
2. 《2008年霍恩斯比地方政府辖区残存林木》（VIS_ID 4472）