...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecosystems >Decadal-Scale Vegetation Change Driven by Salinity at Leading Edge of Rising Sea Level
【24h】

Decadal-Scale Vegetation Change Driven by Salinity at Leading Edge of Rising Sea Level

机译：在海平面上升前沿的盐度驱动的二等级植被变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

As sea levels rise, low-lying coastal forests increasingly are subject to stressors such as inundation and saltwater exposure. At long timescales (for example, centuries), the extent of inundation and saltwater exposure will increase; however, on a decadal timescale, the role of these drivers may differ in both magnitude and direction. To investigate the drivers of decadal-scale vegetation change, we measured the changes in five metrics of vegetation composition and structure between 2003/2004 and 2016/2017 at 98 plots distributed across a vegetation gradient from coastal forest to brackish marshes (< 0.5-18 ppt). We used elevation as a proxy of inundation vulnerability and soil sodium concentration as a proxy of saltwater exposure, and we investigated relationships between these two variables and the change in vegetation conditions between the two sampling periods. Soil sodium concentration was a significant predictor of vegetation change for all five vegetation metrics, whereas the effect of elevation was not significant for any of the metrics. The one site that was affected by wildfire twice during the duration of the study shifted almost completely from forest to marsh with limited regeneration of woody vegetation observed in 2016/2017. Our results show that salinization in our system is a more important driver of vegetation change than inundation potential. Furthermore, the effects of drought-induced salinization could be amplified by the elevated risk of wildfire during droughts. Forecasting the response of coastal wetlands to rising sea levels will require a better understanding of the individual and combined effects of salinity, droughts, and wildfires on vegetation.
机译：随着海平面上升，低洼沿海森林越来越多地受到淹没和盐水暴露等压力的影响。在长时间（例如，世纪），淹没和盐水暴露的程度将增加;然而，在Decadal Timescale上，这些驱动器的作用可能在幅度和方向上不同。为了调查二等规模植被变革的驱动因素，我们测量了2003/2004和2016/2017的五个植被组成和结构的变化，分布在沿海林到咸水沼泽的植被梯度（<0.5-18） PPT）。我们用升高作为淹没脆弱性和土壤钠浓度作为盐水暴露的代理，我们研究了这两个变量与两个采样期间植被条件之间的关系。土壤钠浓度是所有五个植被度量的植被变化的重要预测因素，而升高对任何度量都不重要。在研究期间两次受野火影响的一个地点几乎完全从森林转移到沼泽到2016/2017年观察到的木质植被的有限再生。我们的研究结果表明，我们的系统盐渍化是植被变化的更重要的驾驶员而不是淹没潜力。此外，通过干旱过程中野火的风险升高，可以扩增干旱诱导的盐化的影响。预测沿海湿地对海平面上升的反应将需要更好地了解盐度，干旱和野火的个体和综合影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号