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评估中大西洋淡水湿地的相对脆弱性,以预测水文变化
Denice H Wardrop1, Anna T Hamilton2, Michael Q Nassry1
1Department of Geography, Pennsylvania State University, University Park, Pennsylvania 16802 USA.
概括
气候变化对湿地的影响有很大差异. 一个新的框架有助于通过评估暴露和适应能力来确定脆弱性,这对于定制的湿地管理策略至关重要.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 适应气候变化 适应气候变化
背景情况:
- 湿地提供了必要的生态系统服务.
- 气候变化对湿地功能构成威胁.
- 不同的湿地类型和地区的影响并不均.
研究的目的:
- 提出一个湿地相对脆弱性的框架.
- 帮助制定强有力的气候变化管理战略.
- 将脆弱性分解为暴露和敏感性/适应能力.
主要方法:
- 框架适用于宾夕法尼亚州的河流,斜坡和低谷湿地.
- 使用了气候模型数据 (SRES A2,MRI-CGCM2.3.2) 和宾夕法尼亚州综合水文模型.
- 模拟了未来的水文条件,并分析了脆弱性组件的空间/时间变化.
主要成果:
- 暴露差异在精细的空间尺度上是显著的,甚至在生态区域内也存在差异.
- 季节性暴露差异很大,冬季/春季较湿,夏季较干.
- 湿地类型的敏感性/适应能力在湿地类型之间差异很大.
结论:
- 气候变化引起的水文变化可能超过了人类造成的历史变化.
- 管理策略必须考虑到湿地脆弱性的微小空间和季节性变化.
- 该框架提供了一种可扩展的方法,用于评估和管理湿地对气候变化的反应.
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