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Created mangrove wetlands store belowground carbon and surface elevation change enables them to adjust to sea-level rise

机译:创建的红树林湿地存储地下碳和表面高度变化使其能够适应海平面上升

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摘要

Mangrove wetlands provide ecosystem services for millions of people, most prominently by providing storm protection, food and fodder. Mangrove wetlands are also valuable ecosystems for promoting carbon (C) sequestration and storage. However, loss of mangrove wetlands and these ecosystem services are a global concern, prompting the restoration and creation of mangrove wetlands as a potential solution. Here, we investigate soil surface elevation change, and its components, in created mangrove wetlands over a 25 year developmental gradient. All created mangrove wetlands were exceeding current relative sea-level rise rates (2.6 mm yr−1), with surface elevation change of 4.2–11.0 mm yr−1 compared with 1.5–7.2 mm yr−1 for nearby reference mangroves. While mangrove wetlands store C persistently in roots/soils, storage capacity is most valuable if maintained with future sea-level rise. Through empirical modeling, we discovered that properly designed creation projects may not only yield enhanced C storage, but also can facilitate wetland persistence perennially under current rates of sea-level rise and, for most sites, for over a century with projected medium accelerations in sea-level rise (IPCC RCP 6.0). Only the fastest projected accelerations in sea-level rise (IPCC RCP 8.5) led to widespread submergence and potential loss of stored C for created mangrove wetlands before 2100.
机译:红树林湿地为数百万人提供了生态系统服务,其中最主要的方式是提供风暴防护,食物和饲料。红树林湿地也是促进碳固存和储存的宝贵生态系统。然而,红树林湿地的丧失和这些生态系统服务是全球关注的问题,促使恢复和创建红树林湿地作为一种潜在的解决方案。在这里,我们调查了经过25年的开发梯度的人造红树林湿地的土壤表面海拔变化及其组成。所有创造的红树林湿地都超过了当前的相对海平面上升速率(2.6 mm yr -1 ),地表海拔变化为4.2–11.0 mm yr -1 ,而前者为1.5 –7.2 mm yr −1 用于附近的参考红树林。尽管红树林湿地将C持久地存储在根/土壤中,但如果保持未来海平面的上升,其存储能力将是最有价值的。通过经验建模,我们发现设计合理的创建项目不仅可以提高碳存储量,而且还可以在当前海平面上升速率下,并且在大多数地点,预计超过一个世纪的海洋加速下,常年促进湿地的持久性。级别上升(IPCC RCP 6.0)。预计最快的海平面上升加速(IPCC RCP 8.5)导致2100年前人工红树林湿地的广泛淹没和潜在的碳存储损失。

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