Estimating growth, loss and potential carbon sequestration of farmed kelp: a case study of Saccharina latissima at Strangford Lough, Northern Ireland
Estimating growth, loss and potential carbon sequestration of farmed kelp: a case study of Saccharina latissima at Strangford Lough, Northern Ireland
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DOI：
10.1080/26388081.2022.2081934
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发表时间：
2022-08
影响因子：
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通讯作者：
J. Dolliver;Nessa E. O’Connor
中科院分区：
文献类型：
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作者：
J. Dolliver;Nessa E. O’Connor
摘要许多国家的政府正在评估海洋碳封存进程缓解气候变化不利影响的能力。这包括培养大型藻类以从大气中隔离二氧化碳，这需要现场的准确估计。这项研究通过量化北爱尔兰斯特兰福德湖(54.4°N，5.58°W)的一个海带养殖场释放到环境中的生物量，估计了养殖的大型藻类潜在的碳固存速率。我们估计，在叶片脱落后，种植的海带在收获前平均损失了41%的净第一性生产力(NPP)，相当于在栽培期间每100米延绳钓平均固定7.4公斤的碳。需要核实的粗略估计预测，由于有机碳的长期侵蚀和渗漏，可能还会损失43.2%的NPP。这一封存速度与政府资助的几个农林复合项目的速度相似。因此，有可能对这种量化的生态系统服务进行补贴，以激励大型藻类产业的可持续发展。这些发现对促进大型藻类养殖业的可持续发展至关重要，与联合国可持续发展目标13(气候行动)和目标14(水下生命：“养护和可持续地利用海洋和海洋资源，促进可持续发展”)的实施高度相关。
ABSTRACT Many governments are evaluating marine carbon sequestration processes for their capacity to mitigate the adverse impacts of climate change. This includes the cultivation of macroalgae to sequester carbon dioxide from the atmosphere, which requires accurate estimates from the field. This study estimated the potential rates of carbon sequestration of cultivated macroalgae by quantifying the amount of biomass released into the environment from a kelp, Saccharina latissima, farm in Strangford Lough, Northern Ireland (54.4° N, 5.58° W). We estimated that a mean of 41% of net primary productivity (NPP) of the cultivated kelp was lost prior to harvest following blade fall-off, equivalent to a mean of 7.4 kg of carbon sequestered per 100 m longline at the site during the cultivation period. Coarse estimates requiring verification predicted that a further 43.2% of NPP may have been lost through chronic erosion and exudation of organic carbon. This rate of sequestration is similar to that of several government-funded agroforestry schemes. There is potential, therefore, that this quantified ecosystem service could be subsidized to incentivize the sustainable development of the macroalgae industry. These findings are essential for those promoting the sustainable development of the macroalgae cultivation industry and are highly relevant for implementation of UN Sustainable Development Goal 13 (Climate action) and Goal 14 (Life below water: “Conserve and sustainably use the oceans, seas and marine resources for sustainable development”).