Optimizing fisheries for blue carbon management: Why size matters
Optimizing fisheries for blue carbon management: Why size matters
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DOI：
10.1002/lno.12249
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发表时间：
2022-11-04
影响因子：
4.5
通讯作者：
Pershing, Andrew J.
中科院分区：
文献类型：
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作者：
Falciani, Jonathan E.;Grigoratou, Maria;Pershing, Andrew J.
鱼类有助于将碳排出透光层。它们摄取由浮游植物固定的有机碳，将其储存在组织中，并通过产生下沉的粪便颗粒，在深度呼吸或通过自己的下沉尸体进行长期封存。虽然通过鱼类的碳通量相对于浮游生物的输出通量来说很小，但人类对鱼类群落有直接影响，从而对碳储存和通量的大小有直接影响。我们使用的尺寸谱模型来研究渔业和营养动态的综合影响，总碳储存作为生物量的模拟社区的鱼类。通过对10，500种可能的捕捞策略进行抽样，使捕捞死亡率和尺寸选择性随机化，我们考虑了平衡多个联合国可持续发展目标的最佳策略，这些目标涉及（1）粮食安全，（2）气候行动和（3）海洋保护。该模型表明，优先保护大型物种的渔业管理策略增加了鱼类群落中的总碳储存。这项研究提出了一个观点，考虑在渔业管理的碳储存和封存的替代目标，如粮食生产和生物多样性保护。我们的研究重点是国家（生活社区的总碳）。像粪便颗粒通量，垂直迁移和自然死亡率的上升率过程将建立一个更全面的碳渔业管理方法。
Fish contribute to the export of carbon out of the euphotic zone. They ingest organic carbon fixed by phytoplankton, store it in their tissues for their lifetime, and contribute to long-term sequestration by producing sinking fecal pellets, respiring at depth, or via their own sinking carcasses. While the flux of carbon through fish is small relative to the export flux by plankton, humans have a direct influence on fish communities and thus on the magnitude of carbon storage and flux. We use a size spectrum model to examine the combined effect of fishing and trophic dynamics on the total carbon stored as biomass of a simulated community of fish. By sampling 10,500 possible fishing strategies that randomize fishing mortality and size-selectivity, we consider optimal strategies that balance several UN Sustainable Development Goals addressing (1) food security, (2) climate action, and (3) marine conservation. The model shows that fishery management strategies that preferentially conserve large species increase overall carbon stored in the fish community. This study presents a perspective for considering carbon storage and sequestration in fisheries management alongside alternative objectives such as food production and biodiversity conservation. Our study focused on the state (total carbon in the living community). Incorporating rate processes like fecal pellet flux, vertical migration, and natural mortality would build toward a more holistic carbon approach to fisheries management.