低的珊瑚礁岛屿的风险分类及其对气候威胁的暴露
Thomas E Fellowes1, Ana Vila-Concejo1, Maria Byrne2
1Geocoastal Research Group, School of Geosciences, Faculty of Science, The University of Sydney, Sydney, NSW 2006, Australia; Marine Studies Institute, Faculty of Science, The University of Sydney, Sydney, NSW 2006, Australia.
The Science of the total environment
|November 29, 2023
概括
珊瑚岛面临气候变化风险,大多数澳大利亚岛屿被评估为中度至高脆弱性. 这项研究根据物理特征和环境条件对岛屿风险进行了分类,以告知保护工作.
科学领域:
- 气候变化对沿海生态系统的影响.
- 岛屿生态形态测量和生物物理脆弱性评估.
背景情况:
- 低的珊瑚岛屿容易受到海平面上升,海洋变暖,酸化和风暴增加的影响.
- 了解这些岛屿的各种脆弱性对于有效的气候变化适应战略至关重要.
研究的目的:
- 开发和应用基于风险的分类系统,以评估珊瑚岛对气候变化的脆弱性.
- 评估56个澳大利亚珊瑚岛的生物物理属性和生态形态条件.
主要方法:
- 开发了一个风险分类模型,评分了6个岛屿的生态形态学属性和6个生物物理海洋/气候条件.
- 来自开放访问源的数据被用来将岛屿分为5个风险类别:非常低,低,中等,高和非常高.
- 该模型应用于澳大利亚管辖范围内的56个珊瑚岛屿.
主要成果:
- 没有岛屿被归类为非常低风险;14.3%是低风险,60.7%是中等风险,19.6%是高风险,5.4%是非常高风险.
- 非常高风险岛屿 (NW Shelf) 的特点是小小,低海拔,角形,缺乏植被,低pH值,海平面上升率高,孤立,频繁出现极端天气.
- 低风险岛屿具有更大尺寸,更高的海拔,圆形,植被覆盖,平均pH值,适度的海平面上升率,靠近其他岛屿,以及不常见的极端天气.
结论:
- 开发的风险矩阵有效地评估了珊瑚岛对当前气候变化影响的脆弱性.
- 调查结果突出了岛屿脆弱性的显著差异,特定属性与更高或更低的风险相关.
- 该分类支持未来对气候变化影响的研究,并对岛屿社区,生态系统服务和海洋区域定义产生影响.
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