• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Conservation Biology >Quantifying relative extinction risks and targeting intervention for the orchid flora of a natural park in the European prealps
【24h】

Quantifying relative extinction risks and targeting intervention for the orchid flora of a natural park in the European prealps

机译：量化相对灭绝的风险并针对欧洲阿尔卑斯山天然公园的兰花植物进行干预

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Conservation currently relies largely on hindsight because demographic studies identify population decline after the event. Nevertheless, the degree of aggregation within a population is an "instantaneous" characteristic with the potential to identify populations presently at greatest risk of genetic impoverishment (via Allee effects and in-breeding depression) and local decline. We sought to determine the relative extinction risk for sympatric orchid species throughout Monte Barro natural park (Lecco, Italy), based on an index of dispersion (1) calculatedfrom the size and location of subpopulations (recorded with GPS and mapped with GIS). Three population dispersion types were identified: (1) highly aggregated and locally abundant (large subpopulations restricted to particular sites; e.g., Gyrrmadenia conopsea [L.] kBr; I = 54.5); (2) widespread and moderately aggregated (opportunistic throughout the elevational range of the mountain; e.g., Listera ovata [L.])R.Br; I = 18.9); and (3) weakly aggregated and locally rare (small, highly diffuse subpopulations; e.g., endemic Ophrys benacensis [Reisigl] O.& E Danesch & Ebrend.; I = 4.4). Type I populations are more likely to respond to in situ intervention, whereas type 2 are relatively invasive species for which conservation intervention is not necessary, and type 3 are rare species that are least likely to respond to habitat management, for which ex situ conservation and population reinforcement would be most appropriate. Although our methodology provides only a "snapshot" of aboveground patterns of population dispersion, it can help target the application of in situ and ex situ conservation activities proactively and is of particular utility for parks for which a rapid assessment of local extinction risks is needed.
机译：目前的保护工作很大程度上取决于事后的了解，因为人口统计研究确定了事件发生后人口的减少。但是，种群内的聚集程度是“瞬时的”特征，有可能识别出目前处于遗传贫困（通过阿利效应和近亲衰退）和局部衰退的最大风险中的种群。我们力求根据从亚群的大小和位置（使用GPS记录并使用GIS映射）计算出的分散指数（1），确定整个蒙特巴罗自然公园（意大利莱科）中同属兰花物种的相对灭绝风险。确定了三种人口散布类型：（1）高度聚集且局部丰富（仅限于特定地点的大亚群;例如，Gyrrmadenia conopsea [L.] kBr; I = 54.5）; （2）广泛而适度聚集（在整个山峰海拔范围内都是机会性的;例如，Listera ovata [L。]）R.Br; I = 18.9）; （3）聚集较弱且局部稀少（小的，高度分散的亚种群;例如，地方性的Ophrys benacensis [Reisigl] O.＆E Danesch＆Ebrend。; I = 4.4）。 I型种群更可能对原位干预做出反应，而2型种群是相对入侵的物种，因此无需进行保护干预，而3型种群则是最不响应栖息地管理的稀有物种，因此需要进行非原位保护和人口增长将是最合适的。尽管我们的方法仅提供了地上人口分布的“快照”，但它可以帮助主动地针对原地和非原地保护活动进行应用，并且对于需要快速评估当地灭绝风险的公园特别有用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号