Dalian’s Marine Shellfish and Macroalgae Propel Blue-Carbon Economy Forward

In a groundbreaking study released in ‘Progress in Fishery Sciences’, researchers have shed light on the impressive carbon sink capacity of marine shellfish and macroalgae in Dalian, China. This coastal city, known for its rich fishery resources, is carving out a niche in the burgeoning blue-carbon economy. With a coastline that stretches further than any other city in the country, Dalian is uniquely equipped to harness its offshore biological treasures.

The study, led by Kaijia Ren from the National Marine Environmental Monitoring Center, highlights the significant role that aquaculture plays in carbon sequestration. “Our findings reveal that in 2022, the total carbon sink capacity of marine shellfish and macroalgae in Dalian reached an astounding 826,900 tons,” Ren noted. This capacity includes a net carbon sink of 538,400 tons, which translates to a reduction of nearly 2 million tons of carbon dioxide emissions. This is not just a win for the environment; it also comes with a hefty economic value of approximately 79 million yuan.

Dalian’s aquaculture sector is a powerhouse, contributing about 64.48% of Liaoning Province’s total aquaculture production, with shellfish leading the charge. Notably, species like scallops and kelp are the heavy hitters in the carbon sink game, representing 66.12% and 31.37% of the total carbon sinks respectively. However, it’s essential to note that mussels, despite their high carbon content, accounted for a mere 0.72% of the total carbon sink due to limited farming areas.

The implications of this research extend far beyond academic curiosity. By promoting integrated multi-trophic aquaculture (IMTA), which combines shellfish and macroalgae farming, Dalian could optimize its aquaculture structure. This approach not only enhances carbon sink capacities but also promises a more sustainable and productive aquaculture industry. “Strengthening the aquaculture of high carbon sink species like kelp and mussels can significantly alter the carbon dynamics within our industry,” Ren emphasized.

As the world grapples with climate change, the findings from Dalian could serve as a model for other coastal regions looking to boost their carbon sink capacities while also enhancing their agricultural outputs. This research not only reinforces the importance of marine ecosystems in carbon sequestration but also highlights the commercial viability of sustainable aquaculture practices.

For those interested in diving deeper into this study, you can find more information through the National Marine Environmental Monitoring Center’s website at lead_author_affiliation. As the conversation around climate action and sustainable practices continues to evolve, Dalian’s innovative approach may well set the stage for future developments in the aquaculture sector and beyond.

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