...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological Applications >Incorporating catastrophic risk assessments into setting conservation goals for threatened Pacific Salmon
【24h】

Incorporating catastrophic risk assessments into setting conservation goals for threatened Pacific Salmon

机译：将灾难性的风险评估纳入为受威胁的太平洋鲑鱼制定保护目标的过程

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

Catastrophic die-offs can have important consequences for vertebrate population growth and biodiversity, but catastrophic risks are not commonly incorporated into endangered-species recovery planning. Natural (e.g., landslides, floods) and anthropogenic (e.g., toxic leaks and spills) catastrophes pose a challenge for evolutionarily significant units (ESUs) of Pacific salmon listed under the Endangered Species Act and teetering at precariously low population levels. To spread risks among Puget Sound chinook salmon populations, recovery strategies for ESU-wide viability recommend at least two viable populations of historical life-history types in each of five geographic regions. We explored the likelihood of Puget Sound chinook salmon ESU persistence by examining spatial patterns of catastrophic risk and testing ESU viability recommendations for 22 populations of the threatened Puget Sound chinook salmon ESU. We combined geospatial information about catastrophic risks and chinook salmon distribution in Puget Sound watersheds to categorize relative catastrophic risks for each population. We then analyzed similarities in risk scores among regions and compared risk distributions among strategies: (1) population groups selected using the ESU viability recommendations of having populations spread out geographically and including historical life-history diversity, and (2) population groups selected at random. Risks from individual catastrophes varied among populations, but overall risk from catastrophes was similar within geographic regions. Recovery strategies that called for two viable populations in each of five geographic regions had lower risk than random strategies; strategies that included life-history diversity had even lower risks. Geographically distributed populations have varying catastrophic-risks profiles, thus identifying and reinforcing the spatial and life-history diversity critical for populations to respond to environmental change or needed to rescue severely depleted or extirpated populations. Recovery planning can promote viability of Pacific salmon ESUs across the landscape by incorporating catastrophic risk assessments.
机译：灾难性死亡可能会对脊椎动物种群增长和生物多样性产生重要影响，但灾难性风险通常不会纳入濒危物种恢复计划。自然灾害（例如，山体滑坡，洪水）和人为因素（例如，有毒的泄漏和溢漏）造成的灾难对《濒危物种法》中所列的太平洋鲑鱼的进化重要单位（ESU）构成挑战，并在不稳定的低人口水平下摇摇欲坠。为了在普吉特海湾奇努克鲑鱼种群中分散风险，整个ESU生存力的恢复策略建议在五个地理区域中的每个区域至少生存两个具有历史生活史类型的种群。我们通过检查灾难性风险的空间格局并测试22个受威胁的Puget Sound chinook鲑ESU种群的ESU生存力建议，探索了Puget Sound chinook鲑ESU持续存在的可能性。我们结合了有关普吉特海湾流域巨灾风险和奇努克鲑鱼分布的地理空间信息，对每个人口的相对巨灾风险进行了分类。然后，我们分析了区域之间风险得分的相似性，并比较了策略之间的风险分布：（1）使用ESU生存力建议选择的人群，即在地理上分散人口并包括历史生活史多样性的人群，以及（2）随机选择的人群。个体灾难的风险在人群中各不相同，但在地理区域内，灾难的总体风险相似。在五个地理区域中的每个区域都要求有两个可行种群的恢复策略，其风险要低于随机策略。包括生活史多样性在内的策略具有更低的风险。地理上分散的人口具有不同的灾难性风险概况，因此可以确定和增强对于人口应对环境变化或拯救严重耗尽或灭绝的人口至关重要的空间和生命历史多样性。灾后恢复规划可以通过合并灾难性风险评估来提高太平洋鲑ESU的生存能力。

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