Xiong et al. (2024): Seaweed farming environments do not always function as CO2 sink under synergistic influence of macroalgae and microorganisms

Tianqi Xiong, Hongmei Li, Yubin Hu, Wei-dong Zhai, Zhe Zhang, Yi Liu, Jihong Zhang, Longfei Lu, Lirong Chang, Liang Xue, Qinsheng Wei, Nianzhi Jiao, Yongyu Zhang IN: Agriculture, Ecosystems & Environment 361, 108824, https://doi.org/10.1016/j.agee.2023.108824

Through in-situ mesocosm cultivation experiments and eight field investigations covering different kelp growth stages in an intensive farming area in China, we found that compared with the surrounding seawater without kelps, the seawater at the fast-growth stage of kelp was a sink of CO2 (pCO2 decreased by 17−73 μatm), but became a source of CO2 at the aging stage of kelp (pCO2 increased by 20−37 μatm).