Institute of Fisheries Science, National Taiwan University, Taiwan; Biodiversity Research Center, Institute of Ecology and Evolutionary Biology, Department of Life Science, and Master's Program in Biodiversity, National Taiwan University, Taiwan; Ocean Center, National Taiwan University, Taiwan.
Research Center for Environmental Changes, Academia Sinica, Taiwan; Department of Earth and Planetary Sciences, University of California, Riverside, USA.
Environ Res. 2024 Jun 1;250:118444. doi: 10.1016/j.envres.2024.118444. Epub 2024 Feb 13.
Anthropogenic shifts in seas are reshaping fishing trends, with significant implications for aquatic food sources throughout this century. Examining a 21-year abundance dataset of Argentine shortfin squids Illex argentinus paired with a regional oceanic analysis, we noted strong correlations between squid annual abundance and sea surface temperature (SST) in January and February and eddy kinetic energy (EKE) from March to May in the Southwest Atlantic. A deeper analysis revealed combined ocean-atmosphere interactions, pinpointed as the primary mode in a rotated empirical orthogonal function analysis of SST. This pattern produced colder SST and amplified EKE in the surrounding seas, factors crucial for the unique life stages of squids. Future projections from the CMIP6 archive indicated that this ocean-atmosphere pattern, referred to as the Atlantic symmetric pattern, would persist in its cold SST phase, promoting increased squid abundance. However, rising SSTs due to global warming might counteract the abundance gains. Our findings uncover a previously unrecognized link between squids and specific environmental conditions governed by broader ocean-atmosphere interactions in the Southwest Atlantic. Integrating these insights with seasonal and decadal projections can offer invaluable information to stakeholders in squid fisheries and marine conservation under a changing climate.
人为因素引起的海洋变化正在重塑渔业趋势，这对本世纪的水生食物资源有着重大影响。本研究通过分析阿根廷短鳍鱿鱼 21 年的丰度数据集，并结合区域海洋分析，发现鱿鱼的年丰度与西南大西洋 1 月和 2 月的海面温度（SST）以及 3 月至 5 月的海洋涡动能（EKE）之间存在强烈的相关性。进一步分析表明，海洋-大气的综合相互作用可以被确定为 SST 旋转经验正交函数分析的主要模式。这种模式导致了周围海域 SST 的下降和 EKE 的增强，这对鱿鱼独特的生命阶段至关重要。来自 CMIP6 档案的未来预测表明，这种被称为大西洋对称模式的海洋-大气模式将在其冷 SST 阶段持续存在，从而促进鱿鱼丰度的增加。然而，由于全球变暖导致的 SST 上升可能会抵消丰度的增加。本研究揭示了西南大西洋海洋-大气相互作用下，鱿鱼与特定环境条件之间以前未被认识到的联系。将这些见解与季节性和十年预测相结合，可以为鱿鱼渔业和海洋保护相关利益方提供宝贵的信息，帮助他们在气候变化下进行管理。
