Bivalve farming was usually considered as a CO2 source through respiration and calcification, but recent studies suggest its potential as a CO2 sink, prompting exploration of its inclusion in carbon markets. Here we reviewed the scientific basis behind this idea and found that it is not supported by observational and experimental studies. This idea indeed arises from carbon budget models that are based on theoretical misconceptions regarding seawater carbonate chemistry. The main misunderstanding consists of assuming that the carbon trapped in the shell originates from atmospheric CO2 when it mostly comes from (bi)carbonate ions. While these ions originate from atmospheric CO2 through the erosion of minerals over geological time scales, their incorporation into shells does not prompt short‐term CO2 compensation. The opposite occurs—calcification releases CO2 in seawater and limits or even prevents the uptake of atmospheric CO2. Some authors suggest that considering the bivalve farm ecosystem could change the perspective on the source/sink issue but there is no evidence for that now. Most ecosystem‐based carbon budget models rely on several unverified assumptions and estimates. Although challenging, field measurements must be conducted for monitoring, reporting, and verifying atmospheric CO2 uptake before qualifying for carbon credits. To achieve scientific consensus, we need reinforcing measurement‐based studies of CO2 fluxes in shellfish ecosystems, integrating carbon balance models with observational and experimental science, and fostering interdisciplinary collaboration. Although bivalve farming provides numerous environmental benefits and is vital for sustainable aquaculture, there is currently no evidence that it contributes to CO2 capture.

中文翻译：

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打破神话：双壳类养殖不是二氧化碳吸收池


双壳类养殖通常被视为 CO 2通过呼吸和钙化来源，但最近的研究表明其作为二氧化碳的潜力2汇，促使探索将其纳入碳市场。在这里，我们回顾了这一想法背后的科学依据，发现它并没有得到观察和实验研究的支持。这个想法确实源于碳预算模型，该模型基于有关海水碳酸盐化学的理论误解。主要的误解在于假设壳中捕获的碳来自大气中的二氧化碳2当它主要来自碳酸根离子时。虽然这些离子源自大气中的二氧化碳2通过地质时间尺度上矿物质的侵蚀，它们并入贝壳中不会导致短期二氧化碳排放2赔偿。相反的情况发生——钙化释放二氧化碳2在海水中，限制甚至阻止大气中二氧化碳的吸收2 。一些作者认为，考虑双壳类养殖场生态系统可能会改变对源/汇问题的看法，但目前没有证据表明这一点。大多数基于生态系统的碳预算模型依赖于一些未经验证的假设和估计。尽管具有挑战性，但必须进行现场测量以监测、报告和验证大气二氧化碳2在获得碳信用额资格之前进行吸收。为了达成科学共识，我们需要加强基于测量的二氧化碳研究2贝类生态系统的通量，将碳平衡模型与观测和实验科学相结合，并促进跨学科合作。 尽管双壳类养殖提供了许多环境效益并且对于可持续水产养殖至关重要，但目前没有证据表明它会导致二氧化碳排放2捕获。