Tasmania - CRA/RFA - Forests - National Estate - Refugia from Present Processes

Contemporary refugia contain communities that are strongly associated with climatic and topographic factors that confer a degree of protection from endangering processes such as fire and disease. These refugia have two important roles: they provide locations for the conservation of species and communities and they provide sources for population expansion if limiting conditions abate. \n\nPlaces qualifying as refuges from frequent fire do so because, although they contain plants sensitive to fire, they are protected in the landscape by climatic, topographic and soil features. It is generally accepted, however, that very few, if any, places have totally escaped the effects of fire in Tasmania and that refugia will have occasionally been burnt under extreme fire conditions. But such events are considered much rarer in these places in comparison with areas that lack the protection afforded by refugia. It is the low frequency of burning that marks these places as significant. \n\nAfter wildfire, forest communities associated with refugia are usually slower to recover and may take many decades, even centuries, to do so.\n\nThis database is a digital polygon coverage of Tasmania (captured at 1:100 000 scale). Refugia from present processes are coded with a unique number and the relevant National Estate values and criteria.\n\nAll sites in this coverage are classified according to National Estate criterion A2: Importance in maintaining existing processes or natural systems at the regional or national scale.\n\nThis is an archived dataset jointly owned by the Commonwealth and the Tasmanian Governments under the Tasmania-Commonwealth Regional Forest Agreement (RFA) data agreement of 8th November 1997.This data is available to the public under licence from the Department as part of the Commonwealth Spatial Data Access and Pricing Policy.\n\nAny reproduction of this dataset must carry the following statement:\nCopyright Commonwealth of Australia and Tasmanian Government 1997.\nDepartmental Deed

当代避难所包含与气候和地形因素密切相关的群落，这些因素提供了一定程度的保护，使其免受火灾和疾病等濒危过程的影响。这些避难所有两个重要作用：一是为物种和群落的保护提供场所；二是若限制条件缓解，可为种群扩张提供来源。

能成为频繁火灾避难所的区域之所以符合条件，是因为尽管它们包含对火敏感的植物，但在景观中受到气候、地形和土壤特征的保护。然而，人们普遍认为，塔斯马尼亚几乎没有（若有的话也极少）区域完全逃脱了火灾的影响，且避难所在极端火灾条件下偶尔也会被烧毁。但与缺乏避难所保护的区域相比，此类事件在这些地方要罕见得多。正是低燃烧频率使这些区域具有重要意义。

野火过后，与避难所相关的森林群落恢复通常较慢，可能需要数十年甚至数百年才能恢复。

本数据库是塔斯马尼亚的数字化多边形覆盖图层（以1:100000比例尺采集）。针对当前过程的避难所采用唯一编号及相关国家遗产价值与标准进行编码。

该覆盖图层中的所有站点均根据国家遗产标准A2分类：即在区域或国家尺度上维持现有过程或自然系统的重要性。

本数据集为存档数据，由联邦政府与塔斯马尼亚政府根据1997年11月8日签署的《塔斯马尼亚-联邦区域森林协议》（RFA）数据协议共同所有。作为联邦空间数据访问与定价政策的一部分，本数据可通过部门许可向公众开放。

任何对本数据集的复制必须包含以下声明：澳大利亚联邦与塔斯马尼亚政府版权所有 1997。部门契约。