Climate change mitigation strategy through blue carbon in seagrasses ecosystem, Red Sea Coast, Egypt

• Published in: Mitigation and adaptation strategies for global change 2024-08, Vol.29 (6), p.59, Article 59
• Main Authors: Elmahdy, Rowan, Mandour, Ahmed, El-Sammak, Amr, Elshazly, Ahmed
• Format: Article
• Language: English
• Subjects: Atmospheric Sciences; Biodiversity; Blue carbon; Carbon capture and storage; Carbon dioxide; Carbon dioxide fixation; Carbon sequestration; Climate change; Climate Change Management and Policy; Climate change mitigation; Coral reefs; Cores; Earth and Environmental Science; Earth Sciences; Economic feasibility; Economics; Ecosystems; Environmental economics; Environmental impact; Environmental Management; Geographical distribution; Mangroves; Marine ecosystems; Marine environment; Marine invertebrates; Meadows; Net zero; Organic carbon; Original Article; Protected areas; Sea grasses; Seagrasses; Sediment; Sediments; Sequestering; Vertical distribution
• ISSN: 1381-2386; 1573-1596
• DOI: 10.1007/s11027-024-10150-4

The blue carbon ecosystems possess the potential to mitigate climate change impacts, support adaptation, assist in reaching the national and global net-zero goals, and secure social, economic, and environmental outcomes through sequestering and storing carbon in sediments. The marine environment along the Red Sea coast of Egypt is distinguished by a high biodiversity with key marine ecosystems such as seagrasses meadows, coral reefs, and mangroves that can play a role in blue carbon ecosystems. To understand the capacity of the seagrasses to store carbon, this study aims at quantifying the vertical distribution of the organic carbon density (OCD) and the carbon sequestration potential (CSR) and evaluate the economic feasibility of seagrasses vegetation as a tool for mitigating climate change. Two sediment cores were sampled from vegetated areas (inhabited with seagrasses species: Thalassia hemprichii ) and one core from a non-vegetated area (for comparison) from three nearshore locations within Wadi El Gemal Protected Area, Red Sea Egypt. The OCD in the vegetated areas increased with depth and showed higher capacities of carbon storage compared to the non-vegetated area. The overall calculated CSR for seagrasses in Wadi El-Gemal is 341.65 g C m −2 yr −1 . These findings support the key role of seagrasses to mitigate climate change through CO2 sequestration and return an equivalent of 6,000 to 11,000 USD per year for every 100 hectares in monetary value. This highlights the importance of the conservation and restoration of seagrasses along the Red Sea coast and the potential of blue carbon finance that can be leveraged to meet national-level climate mitigation strategies and policies in Egypt. Graphical Abstract