Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116023, China; State Key Laboratory of Coastal and Offshore Engineering, Dalian 116023, China.
Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116023, China; National Marine Environmental Monitoring Center, Dalian 116023, China; National Key Laboratory of Environmental Remediation and Restoration of Marine Ecological Environment, Dalian 116023, China; State Key Laboratory of Coastal and Offshore Engineering, Dalian 116023, China.
Sci Total Environ. 2024 Dec 1;954:176092. doi: 10.1016/j.scitotenv.2024.176092. Epub 2024 Sep 20.
Suaeda salsa acts as a natural barrier between land and sea in estuarine wetlands while also serving as a significant source of carbon storage. Understanding the synergistic relationship between the spatial distribution of Suaeda salsa habitat suitability and its carbon storage capabilities is essential for guiding ecological restoration and bolstering the carbon sequestration potential of wetlands. Drawing on field survey data from the Liaohe River Estuary wetlands collected in 2021 and 2022, we applied the Maxent model to delineate the spatial distribution of Suaeda salsa habitat suitability. The findings indicate that the principal environmental determinants for the Suaeda salsa community are elevation, soil phosphorus, and sand and soil salt content. Habitats can be divided from into four classes with increasing suitability index: I, II, III, and IV. As the most favorable habitat, class IV spanned 33.07 km and constituted 22.37 % of the area. By integrating remote sensing and ground survey data, a carbon storage evaluation model for Suaeda salsa was developed. This model revealed that the carbon storage within the Liaohe River Estuary reached 8238.18 and 16,194.08 tons in 2021 and 2022, respectively. Finally, the spatial overlay analysis of habitat suitability distribution and carbon storage revealed that an increase in habitat suitability led to an increase in carbon storage in Suaeda salsa, which was also influenced by the surrounding land use types. This work demonstrates a significant positive correlation between habitat suitability and carbon sequestration capacity. In the future, we suggest that ecological restoration projects in the Liaohe Estuary region focus on areas with higher habitat suitability. This study supports the sustainable management of the Suaeda salsa community and provides a theoretical basis for enhancing the carbon sequestration capacity of estuarine wetlands.
海蓬子在河口湿地中起到了陆海之间的天然屏障作用，同时也是碳储存的重要来源。理解海蓬子生境适宜性的空间分布与碳储存能力之间的协同关系，对于指导生态恢复和增强湿地的碳固存潜力至关重要。本研究基于 2021 年和 2022 年在辽河河口湿地采集的实地调查数据，应用最大熵模型来描绘海蓬子生境适宜性的空间分布。研究结果表明，海蓬子群落的主要环境决定因素是海拔、土壤磷、沙和土壤盐分含量。生境可以分为四个适宜性指数递增的类别：I、II、III 和 IV。作为最适宜的生境，IV 类覆盖了 33.07 公里，占总面积的 22.37%。通过整合遥感和地面调查数据，建立了海蓬子碳储量评估模型。该模型表明，2021 年和 2022 年，辽河河口的碳储量分别达到 8238.18 和 16194.08 吨。最后，生境适宜性分布和碳储量的空间叠加分析表明，生境适宜性的增加导致海蓬子碳储量的增加，这也受到周围土地利用类型的影响。这项工作证明了生境适宜性与碳固存能力之间存在显著的正相关关系。未来，我们建议在辽河口地区的生态恢复项目中，重点关注生境适宜性较高的区域。本研究为可持续管理海蓬子群落提供了支持，并为增强河口湿地的碳固存能力提供了理论依据。
