Successional Stages on Crown Land for CRA Upper North East. VIS_ID 3891

This data layer shows the distribution of Candidate Old Growth forest and other Successional Stages on Crown Land in Upper North East New South Wales as required by the Regional Forest Agreements (RFA). An expert panel convened by the NSW Environmental Heritage and Technical Committee (EHTC) in 1997 developed a process for the identification and derivation of the following Successional Stages:;\r\n;\r\nCandidate Old Growth ;\r\nDisturbed Old Growth ;\r\nMature Forest;\r\nDisturbed Mature Forest;\r\nYoung Forest;\r\nRecently Disturbed Forest;\r\nRainforest.;\r\n;\r\nThis data layer is an update of the original Successional Stages layer produced during the U/LNE Comprehensive Regional Assessment (CRA) process in 1998. The Comprehensive Regional Assessment Aerial Photographic Interpretation (CRAFTI) data were crucial for Successional Stage derivation, however they were not completed in time for derivation on freehold land in Upper North East (floristics) and all tenures in Lower North East (structure and floristics). The U/LNE Forest Agreements stipulate that data on freehold land will be updated when CRAFTI data become available. With the finalisation of the digital CRAFTI layer in September 2000, Successional Stages could be derived across freehold lands. ;\r\n;\r\nThe same methodology for deriving the original Successional Stages layer during the CRA (RACD 1999a) was used for this process. Distribution of Candidate Old Growth forest and other Successional Stages were derived by integrating structural maturity classes from 1:25,000 scale Aerial Photographic Interpretation (API), interpretability classes derived from vegetation mapping units, and disturbance history from CRAFTI and State Forests New South Wales (SFNSW) records. The rainforest component is an amalgamation of mapped data from SFNSW Forest Typing (Forestry Commission of NSW 1989) and CRAFTI taken from the Forest Ecosystems layer (RACD 1999b).;\r\n;\r\nRFA projects dependent on the completion of the Successional Stages layer include fauna and flora habitat remodelling and derivation of old growth forest ecosystems on freehold land. The data will also be of use to the Department of Land and Water Conservation and Regional Vegetation Committees in land management decisions.;\r\n;\r\nVIS ID 3891

本数据图层依据《区域森林协议》（Regional Forest Agreements, RFA）要求，展示了新南威尔士州上东北地区王室土地上的候选原始森林（Candidate Old Growth forest）及其他演替阶段（Successional Stages）的分布情况。1997年，由新南威尔士州环境遗产与技术委员会（Environmental Heritage and Technical Committee, EHTC）召集的专家小组，制定了一套用于识别和推导以下演替阶段的流程：
候选原始森林；
受干扰原始森林；
成熟林；
受干扰成熟林；
幼龄林；
近期受干扰林；
雨林。

本数据图层是1998年U/LNE综合区域评估（Comprehensive Regional Assessment, CRA）流程中生成的原始演替阶段图层的更新版本。综合区域评估航空摄影解译（Comprehensive Regional Assessment Aerial Photographic Interpretation, CRAFTI）数据对演替阶段的推导至关重要，但该数据未能及时完成，无法用于上东北地区自由保有土地（涉及植物区系）以及下东北地区所有保有类型的演替阶段推导（涉及结构与植物区系）。《上下东北地区森林协议》规定，当CRAFTI数据可用时，将更新自由保有土地上的相关数据。随着2000年9月数字版CRAFTI图层最终定稿，演替阶段可在全部自由保有土地上完成推导。

本次流程沿用了综合区域评估期间推导原始演替阶段图层的方法（RACD 1999a）。候选原始森林及其他演替阶段的分布数据，通过整合以下信息推导得出：1:25000比例尺航空摄影解译（Aerial Photographic Interpretation, API）得到的结构成熟度分级、植被制图单元衍生的可解译性分级，以及来自CRAFTI与新南威尔士州国家森林局（State Forests New South Wales, SFNSW）记录的干扰历史。雨林组分的数据整合了来自SFNSW森林类型制图（新南威尔士州林业委员会，1989年）以及取自森林生态系统图层（RACD 1999b）的CRAFTI数据。

依赖演替阶段图层完成的《区域森林协议》相关项目包括动植物栖息地重构，以及自由保有土地上原始森林生态系统的推导工作。该数据亦可协助土地与水资源保护部及区域植被委员会开展土地管理决策工作。

VIS ID 3891