高地植被的移除作为促进陆地盐沼迁移的潜在工具
Kenneth B Raposa1, Robin L J Weber1, Daisy Durant1
1Narragansett Bay National Estuarine Research Reserve, RI Department of Environmental Management, Prudence Island, RI.
概括
移除高地植被可以帮助盐沼迁移到陆地,以应对海平面上升. 然而,这种方法提供了一个有限的窗口,可能有生态权衡.
科学领域:
- 沿海生态 沿海生态
- 环境管理环境管理
- 适应气候变化 适应气候变化
背景情况:
- 盐沼面临海平面上升的威胁.
- 促进陆地沼泽迁移是一个关键的弹性战略.
- 移除高地植被是一种潜在的,但未经研究的干预措施.
研究的目的:
- 实验评估高地植被清除在促进盐沼迁移方面的有效性.
- 评估对沼泽面积,植物覆盖面和鸟类繁多的短期影响.
- 为了确定移除效应的长期持久性.
主要方法:
- 实地实验涉及移除与盐沼邻的森林,灌木和Phragmites australis植被.
- 监测环境光线,沼泽植物覆盖面,范围,海拔和鸟类数量.
- 长期观察 (5年) 息地和植被恢复.
主要成果:
- 高地植被的移除增加了整个息地的环境光线.
- 沼泽植物覆盖面,范围和高度的显著增加发生在灌木息地.
- 在灌木息地的沼泽植物殖民是依赖于Baccharis halimifolia的去除.
- 森林和灌木息地的总鸟类数量减少.
- 在所有高地息地中,植被恢复到最初的条件发生在五年内.
结论:
- 高地植被的移除可以促进短期的盐沼迁移,特别是在灌木的地区.
- 这些好处是暂时的,这表明干预的窗口有限.
- 持续的沼泽迁移可能需要更密集的方法.
- 必须考虑生态权衡,例如对鸟类种群的影响.
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