在一个被水淹没的罗德岛 (美国) 盐沼上增加排水效应
Kenneth B Raposa1, Robin L Weber1, Wenley Ferguson2
1Narragansett Bay National Estuarine Research Reserve, Prudence Island RI USA.
概括
排水改善减少了盐沼地区的水积累,但造成了海拔降低,可能抵消了这些好处. 海平面上升的影响可能会超过局部排水工作.
科学领域:
- 生态生态学 生态生态学
- 沿海科学 沿海科学
- 环境管理环境管理
背景情况:
- 排水改善技术,如沟挖掘,用于管理潮沼泽的水位,用于农业和蚊子控制.
- 这些方法越来越多地被认为是为了提高沼泽地对海平面上升的抵御力,但它们的有效性需要进一步研究.
研究的目的:
- 评估盐沼地对排水改善的短期物理和生物反应.
- 评估排水对水位,沼泽高度,植被和鸟类群落的影响.
主要方法:
- 一个受控的实地实验是在罗德岛的盐沼进行的.
- 监测包括水位,沼泽面高度,植被组成和覆盖,以及鸟类密度.
主要成果:
- 排水改善迅速减少了沼泽表面的洪水和低水位.
- 沼泽面的高度最初增加了,但随后显著下降,特别是在有Spartina alterniflora或裸露地面的地区.
- 植物组成和鸟类群落没有显著变化,尽管裸露的区域重新植被.
结论:
- 改善排水可以缓解水浸,但不会立即损害植被或鸟类群落.
- 然而,它可以诱导沼泽平台的海拔损失,可能抵消预期的好处,并阻碍高沼泽增强.
- 海平面上升等大规模因素最终可能会主导局部排水干预.
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