水产学报2025，Vol.49Issue(12)：62-74,13.DOI:10.11964/jfc.20250314933
海洋热浪对西北太平洋柔鱼时空分布的影响
Impact of marine heatwave on the spatiotemporal distribution of Ommastrephes bartramii in the Northwestern Pacific Ocean
摘要
Abstract
Ommastrephes bartramii,a short-lived cephalopod species,is highly sensitive to environmental variability.The Northwestern Pacific Ocean serves as its primary habitat,where frequent marine heatwaves(MHWs)significantly impact popu-lation dynamics.However,the mechanisms underlying these impacts remain poorly understood.The study aims to elucidate the impact mechanisms of MHWs on the resource abundance and spatiotemporal distribution of O.bartramii in the Northwestern Pacific Ocean.The study utilizes gridded fishery and environmental data spanning May to November from 1995 to 2020 across O.bartramii fishing grounds in the Northwest Pacific Ocean.A seasonal dynamic threshold method was employed to identify MHW events,quantify cumulative intensity,and distinguish between MHW and non-MHW periods.Following precise spati-otemporal alignment of samples,variance inflation factor analysis was conducted to screen independent environmental vari-ables.A boosted regression tree(BRT)model was developed to analyze the impact mechanisms of MHWs and environmental factors on O.bartramii abundance and distribution,and to reveal core habitats and their spatiotemporal dynamics.The cumulat-ive intensity exhibited significant intermonth variability,showing a strong positive correlation with O.bartramii resource abundance(R=0.858,P=0.013).The BRT model revealed that cumulative intensity served as an ecological indicator of O.bartramii resource abundance,accounting for 3.427%of the model's relative importance.Response curves demonstrated signi-ficantly higher O.bartramii resource abundance under MHW conditions,with a slight increasing trend under higher cumulat-ive intensity.Model results identified high-abundance regions within 42°-45°N,150°-175°E,revealing significant spatiotem-poral coupling between O.bartramii abundance and cumulative intensity from May to November.The occurrence of MHWs is more conducive to the aggregation of O.bartramii,promoting the formation of high-abundance fishing grounds.Given the scarcity of biological data,the analytical framework proposed in this study provides a generalizable approach for investigating MHW-marine organism interactions.These findings offer scientific support for O.bartramii stock assessment and sustainable fishery management strategies.关键词
柔鱼/海洋热浪/提升回归树模型/时空分布/西北太平洋Key words
Ommastrephes bartramii/marine heatwaves/boosted regression tree/spatiotemporal distribution/the Northwest-ern Pacific分类
农业科技引用本文复制引用
赵春德,陈新军,雷林,王晓辉,汪金涛..海洋热浪对西北太平洋柔鱼时空分布的影响[J].水产学报,2025,49(12):62-74,13.基金项目
国家重点研发计划(2023YFD2401303) （2023YFD2401303）
国家自然科学基金(NSFC42476086) （NSFC42476086）
鱿鱼渔业渔情预报服务系统开发(COFC-C-S-2024-003) National Key Research and Development Program of China(2023YFD2401303) （COFC-C-S-2024-003）
National Natural Science Foundation of China(NSFC42476086) （NSFC42476086）
Development of Squid Fishery Forecasting Service System(COFC-C-S-2024-003) （COFC-C-S-2024-003）
