Zhang Qun, Li Bo
Shanghai Academy of Landscape Architecture Science and Planning/Shanghai Engineering Research Center of Landscaping on Challenging Urban Sites/Key Laboratory of National Forestry and Grassland Administration on Ecological Landscaping of Challenging Urban Sites, Shanghai 200232, China.
Institute of Biodiversity Science, School of Life Sciences, Fudan University/National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary/Ministry of Education Key Laboratory of Biodiversity Science and Ecological Engineering, Shanghai 200438, China.
Ying Yong Sheng Tai Xue Bao. 2023 Oct;34(10):2663-2671. doi: 10.13287/j.1001-9332.202310.029.
The coastal saltmarshes in China have been seriously degraded and artificial restoration strategies have become one of the primary measures to protect the coastal habitats. In this study, we investigated efficient restoration techniques for native saltmarsh plants in vacant habitats within the project area of the Ecological Control of and Improvement of Birds Habitats in the Shanghai Chongming Dongtan Bird National Nature Reserve in the Yangtze Estuary. Through field and pilot experiments, we analyzed the effects of propagule types and transplanting methods on the restoration efficiency of , a dominant saltmarsh species in the Yangtze Estuary. We further evaluated the cost and efficiency of various restoration strategies. Our results indicated that: 1) The corm seedlings of had higher flood tolerance, and were suitable for use in the habitats with higher environmental heterogeneity. 2) Across the four treatments for restoration, the most economically efficient treatment was to transplant low-density corm seedlings without sediment, with an investment cost of approximately ￥10100 per hectare. The costs were ￥41100, ￥30000, and ￥120100 per hectare for high-density without sediment, low-density with sediment, and high-density with sediment restoration, respectively. 3) After nearly 5-yr efforts, the community of Plot C3 in project area had achieved a coverage of over 60%, marking a relatively successful large-scale field restoration. This study could provide the foundation and support for large-scale coastal saltmarsh restoration projects.
中国沿海盐沼已严重退化，人工修复策略已成为保护沿海栖息地的主要措施之一。在本研究中，我们调查了长江口上海崇明东滩鸟类国家级自然保护区鸟类栖息地生态治理与改善项目区内空置栖息地原生盐沼植物的高效修复技术。通过田间和试点实验，我们分析了繁殖体类型和移植方法对长江口优势盐沼物种海三棱藨草修复效率的影响。我们进一步评估了各种修复策略的成本和效率。我们的结果表明：1）海三棱藨草的球茎幼苗具有较高的耐淹性，适用于环境异质性较高的栖息地。2）在海三棱藨草修复的四种处理中，最经济高效的处理方法是移植低密度无沉积物的球茎幼苗，每公顷投资成本约为10100元。高密度无沉积物、低密度有沉积物和高密度有沉积物修复的成本分别为每公顷41100元、30000元和120100元。3）经过近5年的努力，项目区C3地块的海三棱藨草群落覆盖率达到了60%以上，标志着一次相对成功的大规模田间修复。本研究可为大规模沿海盐沼修复项目提供基础和支持。
