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替代未来植被路径揭示了美国西部生态系统的潜在变化
Tyler J Hoecker1,2,3, Kimberley T Davis4, Caitlin Littlefield5
1Vibrant Planet, PBC, Truckee, California, USA.
Global change biology
|March 9, 2026
概括
气候模拟影响模型 (AIMs) 预测美国西部将发生重大生态转型,其中29%的地区高度脆弱. 这些发现有助于土地管理者应对气候变化对生态系统和植被变化的影响.
科学领域:
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
- 环境管理环境管理
背景情况:
- 在气候变化下管理生态系统是具有挑战性的,因为未来的气候不确定性和各种生态系统的反应.
- 了解可信的植被轨迹对于土地管理者来说至关重要,他们可以探索不同的场景,并将建模结果与观察结果结合起来.
研究的目的:
- 在21世纪中叶的气候场景下,使用气候类比影响模型 (AIMs) 预测美国西部的植被变化.
- 基于预测分歧来描述生态转型的脆弱性,并证明AIM在决策中的实用性.
- 确定易受气候驱动生态变化的地区和植被类型.
主要方法:
- 气候模拟影响模型 (AIM) 用于比较气候相似地点之间的环境数据.
- 在特定的气候场景下,对美国西部的植被变化进行了预测.
- 通过分析预测植被轨迹的分歧来评估生态转型的脆弱性.
主要成果:
- 预计美国西部29% (近100万平方公里) 的地区对生态转型的高度或非常高的脆弱性.
- 植被群体之间的脆弱性差异很大,高山植被的75%高度脆弱,而沙漠灌木的6%非常脆弱.
- 在植被类型层面,研究面积的40% (140万平方公里) 预计将发生转型,预计森林面积将减少9% (亚高山森林减少54%).
结论:
- AIM为潜在的生态转型及其脆弱性提供了有价值的见解,为土地管理策略提供了信息.
- 由于预计的植被转移,预计将对生态系统服务和自然资源产生重大下游影响.
- 调查结果强调,需要制定决策框架,将AIM预测与当地专业知识和多样化的知识系统相结合,以有效管理生态变化.
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