Successional Stages on Crown Land for CRA Lower North East. VIS_ID 3890

This data layer shows the distribution of Candidate Old Growth forest and other Successional Stages on Crown Land in Lower 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 3890

本数据图层展示了新南威尔士州下东北部地区王室土地（Crown Land）上的候选原始林与其他演替阶段的分布情况，符合区域森林协议（Regional Forest Agreements, RFA）的相关要求。

1997年，由新南威尔士州环境遗产与技术委员会（NSW Environmental Heritage and Technical Committee, EHTC）召集的专家小组制定了一套标准化流程，用于识别并划分以下演替阶段：;
候选原始林（Candidate Old Growth）;
受干扰原始林（Disturbed Old Growth）;
成熟林（Mature Forest）;
受干扰成熟林（Disturbed Mature Forest);
幼龄林（Young Forest);
新近受干扰林（Recently Disturbed Forest);
雨林（Rainforest).;

本数据图层是1998年上/下东北部（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）数据对演替阶段的划分工作至关重要，但该数据未能及时完成，无法用于上东北部永久业权土地（基于植物区系特征）以及下东北部所有保有类型土地（基于结构与植物区系特征）的演替阶段划分。U/LNE森林协议规定，当CRAFTI数据可用时，将更新永久业权土地上的相关数据。2000年9月数字版CRAFTI图层最终定稿后，即可在永久业权土地上完成全部演替阶段的划分工作。

本次划分流程沿用了1998年综合区域评估（RACD 1999a）中生成原始演替阶段图层的方法。候选原始林与其他演替阶段的空间分布通过多源数据融合得到：1:25000比例尺航空摄影解译（Aerial Photographic Interpretation, API）所得的结构成熟度等级、植被制图单元派生的可解译等级，以及来自CRAFTI与新南威尔士州州立森林（State Forests New South Wales, SFNSW）记录的干扰历史数据。雨林组分则整合了新南威尔士州林业委员会1989年发布的SFNSW森林类型制图数据，以及取自森林生态系统图层（RACD 1999b）的CRAFTI数据。

依赖本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塑，以及永久业权土地上原始林生态系统的划分工作。本数据还可用于土地与水资源保护部以及区域植被委员会开展土地管理决策。

VIS ID 3890