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    溫健,貢靜雯,李婷,趙嵩玲,田園園,陳新軍,余為.異常氣候條件下秘魯外海莖柔魚棲息地的時空變動[J].海洋學報,2020,42(10):92-99
    異常氣候條件下秘魯外海莖柔魚棲息地的時空變動
    Spatio-temporal variations in the habitat of jumbo squid Dosidicus gigas in the Southeast Pacific Ocean off Peru under anomalous climate conditions
    投稿時間:2019-06-10  修訂日期:2019-07-22
    DOI:10.3969/j.issn.0253-4193.2020.10.009
    中文關鍵詞:  莖柔魚  棲息地  時空分布  異常氣候條件  秘魯
    英文關鍵詞:Dosidicus gigas  habitat  spatio-temporal distribution  anomalous climate conditions  Peru
    基金項目:國家重點研發計劃項目(2019YFD0901405);上海市自然科學基金(19ZR1423000);國家自然科學基金(NSFC41876141);大洋漁業資源可持續發展重點實驗室開放基金(A1-0203-00-2009-5);上海市水產高峰一流學科(Fisheries A)。
    作者單位E-mail
    溫健 上海海洋大學 海洋科學學院,上海 201306  
    貢靜雯 上海海洋大學 海洋科學學院,上海 201306  
    李婷 上海海洋大學 海洋科學學院,上海 201306  
    趙嵩玲 上海海洋大學 海洋科學學院,上海 201306  
    田園園 上海海洋大學 海洋科學學院,上海 201306  
    陳新軍 上海海洋大學 海洋科學學院,上海 201306
    國家遠洋漁業工程技術研究中心,上海 201306
    大洋漁業資源可持續開發教育部重點實驗室,上海 201306
    遠洋漁業協同創新中心,上海 201306 
     
    余為 上海海洋大學 海洋科學學院,上海 201306
    國家遠洋漁業工程技術研究中心,上海 201306
    大洋漁業資源可持續開發教育部重點實驗室,上海 201306
    遠洋漁業協同創新中心,上海 201306 
    wyu@shou.edu.cn 
    摘要點擊次數: 1148
    全文下載次數: 4233
    中文摘要:
          莖柔魚主要分布于東太平洋,是我國魷釣漁船的主要捕撈對象,氣候變化對其棲息地有較大影響。本研究依據1950-2015年海表溫度(SST)、海表高度距平(SSHA)以及尼諾指數(Niño3.4指數),計算秘魯外海莖柔魚棲息地適宜性指數(HSI),分析在厄爾尼諾(El Niño)、正常氣候和拉尼娜(La Niña)條件下適宜棲息地的時空變動。分析表明,海表溫度距平(SSTA)和SSHA與Niño3.4指數的變化趨勢基本相同,Niño3.4指數與SSTA和SSHA均呈顯著正相關,但與HSI值呈顯著負相關。依據氣候事件的定義,將研究年份劃分為El Niño年,正常年和La Niña年。研究發現,在El Niño年,莖柔魚漁場水溫變暖,海面高度上升,適宜的SST和SSHA范圍縮小,導致適宜的棲息地面積范圍縮減;而在正常氣候和La Niña年份,莖柔魚漁場水溫變冷,海面高度下降,適宜的SST和SSHA范圍增大,因此適宜的棲息地面積范圍增加。此外,Niño3.4指數和莖柔魚漁場HSI緯度重心呈顯著正相關,在El Niño事件下適宜的棲息地緯度重心向南偏移。研究認為,不同ENSO事件下莖柔魚漁場環境變化顯著,進而影響莖柔魚適宜的棲息地范圍及其空間分布。
    英文摘要:
          Jumbo squid Dosidicus gigas is the main fishing target by Chinese squid-jigging fisheries, which mainly distributes in the eastern Pacific Ocean. Its habitat can be greatly affected by climatic changes. In this study, we calculated the habitat suitability index (HSI) on the squid fishing ground in the Southeast Pacific Ocean off Peru based on data of sea surface temperature (SST), the anomalies of sea surface height (SSHA) and Niño3.4 index during 1950 to 2015. Spatio-temporal variations in the squid habitat were further examined under the El Niño, the normal and the La Niña conditions. The results showed that variations in SST anomalies (SSTA) and SSHA in the fishing ground were consistent with those of the Niño3.4 index. Cross correlation analysis indicated that both SSTA and SSHA were significantly positively correlated with the Niño3.4 index. However, the HSI values were significantly negatively correlated with the Niño3.4 index. We divided the years between 1950 and 2015 into three types, the El Niño years, the normal years and the La Niña years. During the El Niño years, water temperature became warm, and the SSH increased; these changes led to contracted areas of suitable SST and SSHA, therefore, the range of suitable habitats largely decreased. However, during the normal and the La Niña years, water temperature was cold, the SSH decreased, and ranges of suitable SST and SSHA enlarged; these changes resulted in the increases in suitable habitat for the squid. Furthermore, the latitudinal gravity centers of suitable HSI on the squid fishing ground were significantly positively correlated with the Niño3.4 index. The latitudinal gravity centers of suitable HSI shifted southward in the El Niño years. Our findings suggested that ENSO events significantly affected environmental conditions on the squid fishing ground, and thus affected ranges and latitudinal distribution of suitable habitat for the squid in the Southeast Pacific Ocean off Peru.
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