Past and future marsh adaptation: Lessons learned from the Ria Formosa lagoon.
Past and future marsh adaptation: Lessons learned from the Ria Formosa lagoon.
复制标题
过去和未来的沼泽适应：从 Ria Formosa 泻湖吸取的教训。
DOI：
10.1016/j.scitotenv.2021.148082
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
A. Matias
中科院分区：
文献类型：
--
作者：
A. R. Carrasco;K. Kombiadou;M. Amado;A. Matias
可以合理地假设，在沉积物含量高的地区，盐沼在面临一系列海平面变化时应保持稳定或淹没，而在沉积物含量低的系统中，盐沼则可能被侵蚀或淹没。尽管进行了广泛的理论和实验室研究，但仍然需要在人类压力和海平面上升速度加快的情况下提供更多的沼泽“持久性”指标。本研究调查最近发生在里亚福尔摩沙泻湖（葡萄牙南部）的泻湖沼泽的横向和体积的变化，在人类的压力和海平面上升。我们的分析评估了过去（1947年至2014年）的沼泽地貌演变的基础上航空影像分析，并估计其潜在的未来调整海平面上升（~100年）的基础上SLAMM（基于植被的模型）模拟土地覆盖变化。我们强调这两种压力对沼泽生态系统的影响，并研究它们的相互作用如何有助于了解海平面上升的影响和泻湖沼泽的生态恢复力。在过去的70年里，福尔摩沙的盐沼缓慢扩张（~0.2毫米/年），潮汐入口前和沿着主要航道出现局部侵蚀，与入口迁移和疏浚活动有关。过去的演变表明，该生态系统能够维持其功能并科普海平面上升。然而，未来的沼泽轨迹下的高海平面上升率表明不平衡的垂直沼泽加积和逐步迁移的潮滩（和水体）向盐沼地区。模型结果表明，在沼泽响应高海平面上升率，这可能表明存在一个系统的临界点和潜在的正反馈（干扰增强）系统内的非线性证据，与沼泽恢复力的重大影响。
It is rational to assume that salt marshes in regions where sediment loads are high should remain stable or prograde when facing a range of sea-level scenarios, whereas those in sediment-poor systems may erode or drown. Despite extensive theoretical and laboratory studies, additional marsh ‘persistence’ indicators under human pressures and accelerated sea-level rise rates are still needed. This study investigates the recent lateral and volumetric changes occurring in the lagoon marshes of the Ria Formosa lagoon (south Portugal), under human pressures and sea-level rise. Our analysis assesses the past (1947–2014) geomorphological evolution of marshes based on aerial imagery analysis and estimates its potential future adjustment to sea-level rise (~100 years) based on SLAMM (landscape-based model) simulated land cover changes. We highlight the influence of both stressors on marsh ecosystems and examine how their interactions can contribute to understanding sea-level rise impacts and ecological resilience of lagoon marshes. Salt marshes in the Ria Formosa have slowly expanded over the last 70 years (~0.2 mm/yr), with local erosion in front of tidal inlets and along the main navigable channels, associated with inlet migration and dredging activities. Past evolution shows that the ecosystem was able to maintain its functions and cope with sea-level rise. However, future marsh trajectories under a high sea-level rise rate suggest unbalanced vertical marsh accretion and progressive migration of the tidal flat (and water bodies) towards the salt marsh area. The model results show evidence of non-linearity in marsh response to high sea-level rise rates, which could indicate the presence of a system tipping-point and potential positive (disturbance-reinforcing) feedbacks within the system, with significant implications to marsh resilience.
DOI：
10.5194/hess-2016-225-rc1
发表时间：
2016
期刊：
--
影响因子：
--
作者：
N. Ganju;Z. Defne;M. Kirwan;S. Fagherazzi;A. D’Alpaos;L. Carniello
通讯作者：
N. Ganju;Z. Defne;M. Kirwan;S. Fagherazzi;A. D’Alpaos;L. Carniello
影响因子：
64.8
作者：
Schuerch, Mark;Spencer, Tom;Brown, Sally
通讯作者：
Brown, Sally
盐沼的海拔和开放水转化是否相关？
影响因子：
5.2
作者：
Ganju, Neil K.;Defne, Zafer;Fagherazzi, Sergio
通讯作者：
Fagherazzi, Sergio