| 秘鲁外海茎柔鱼栖息地适宜性年代际变动 |
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| 引用本文： | 温健,陆鑫一,余为,陈新军,刘必林.秘鲁外海茎柔鱼栖息地适宜性年代际变动[J].海洋学报,2020,42(6):36-43. |
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| 作者姓名： | 温健 陆鑫一 余为 陈新军 刘必林 |
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| 作者单位： | 1.上海海洋大学 海洋科学学院，上海 201306 |
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| 基金项目： | 国家重点研发计划（2019YFD0901405，2019YFD0901404）；国家自然科学基金青年科学基金（41906073）；上海市自然科学基金（19ZR1423000）；上海市高校特聘教授“东方学者”岗位计划项目（0810000243）；上海市“浦江人才”计划项目（18PJ1404100）。 |
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| 摘 要： | 茎柔鱼广泛分布于东南太平洋海域，是我国重要的远洋捕捞对象之一，其种群易受气候和栖息地环境的影响。利用海表面温度(SST)和海表面高度距平(SSHA)两个关键环境因子，计算1950?2015年1?12月秘鲁外海茎柔鱼栖息地适宜性指数(HSI)，对比分析太平洋年代际涛动(PDO)位于冷暖位相下茎柔鱼渔场环境以及栖息地质量的变动。结果显示，1950?2015年PDO呈现冷、暖、冷3个位相变化，其中PDO冷位相内的SST距平(SSTA)和SSHA明显低于PDO暖位相。交相关分析结果表明，PDO指数与SSTA和SSHA均呈显著正相关，而HSI与PDO指数、SSTA和SSHA均呈显著负相关。PDO位于冷位相时，茎柔鱼渔场内水温变冷，海面高度下降，适宜的SST和SSHA范围增加，因此茎柔鱼有利的栖息地面积增大；而PDO位于暖位相时，水温增暖，海面高度上升，适宜的SST和SSHA范围缩减，导致茎柔鱼适宜的栖息地面积缩小。研究认为，太平洋年代际涛动调控了茎柔鱼渔场内的环境变化，进而对茎柔鱼栖息地质量及适宜栖息地范围产生显著影响。
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| 关 键 词： | 茎柔鱼 栖息地适宜性 太平洋年代际涛动 时空分布 秘鲁 |
| 收稿时间： | 2019/2/16 0:00:00 |
| 修稿时间： | 2019/4/23 0:00:00 |
Decadal variations in habitat suitability of Dosidicus gigas in the Southeast Pacific Ocean off Peru |
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| Wen Jian,Lu Xinyi,Yu Wei,Chen Xinjun,Liu Bilin.Decadal variations in habitat suitability of Dosidicus gigas in the Southeast Pacific Ocean off Peru[J].Acta Oceanologica Sinica (in Chinese),2020,42(6):36-43. |
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| Authors: | Wen Jian Lu Xinyi Yu Wei Chen Xinjun Liu Bilin |
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| Institution: | 1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China2.National Engineering Research Center for Oceanic Fisheries, Shanghai 201306, China3.Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, Shanghai 201306, China4.Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China |
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| Abstract: | Dosidicus gigas is an important fishing target by Chinese squid-jigging fisheries, which is widely distributed in the Southeast Pacific Ocean. Its population is largely affected by climatic and environmental conditions on the fishing ground. In this study, we calculated the habitat suitability index (HSI) on the fishing ground of D. gigas in the Southeast Pacific Ocean off Peru from January to December during 1950 to 2015 based on sea surface temperature (SST) and the anomalies of sea surface height (SSHA), and variability in the environmental variables and habitat quality were further analyzed under the warm and cold phases of the Pacific Decadal Oscillation (PDO). The results suggested that PDO showed cold, warm and cold phases from 1950 to 2015. The anomalies of SST (SSTA) and SSHA during the cold PDO were significantly lower than those during the warm PDO. The cross correlation analysis suggested that both the SSTA and the SSHA were significantly positively correlated with the PDO index. However, and the HSI values on the fishing ground of D. gigas were significantly negatively correlated with the PDO index, SSTA and SSHA. During the cold PDO, the water temperature became cold, and the SSH decreased, these changes led to enlarged areas of suitable SST and SSHA for D. gigas, therefore, the favorable habitats largely increased. However, during the warm PDO, the water temperature became warm, the SSH elevated, whereas the ranges of suitable SST and SSHA contracted, all these changes resulted in the decrease of the suitable habitat of D. gigas. Our findings suggested that PDO regulated the environmental conditions on the fishing ground of D. gigas off Peru, and further significantly affected the habitat quality and suitable ranges of the habitat. |
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| Keywords: | Dosidicus gigas habitat suitability Pacific Decadal Oscillation spatio-temporal distribution Peru |
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