海洋学研究 ›› 2024, Vol. 42 ›› Issue (4): 43-57.DOI: 10.3969/j.issn.1001-909X.2024.04.005

• 研究论文 • 上一篇    下一篇

基于时序特征参数的南极磷虾栖息地适宜性模型及长时序变化分析——以宇航员海与迪尔维尔海为例

谭亦杨1,2,3(), 白雁1,2,3,*(), 李腾2,3, 郑芯瑜1,2,3, 张银雪4, 张异凡1,2,3   

  1. 1.上海交通大学 海洋学院,上海 200030
    2.自然资源部第二海洋研究所,浙江 杭州 310012
    3.卫星海洋环境动力学国家重点实验室,浙江 杭州 310012
    4.河海大学 海洋学院,江苏 南京 210023
  • 收稿日期:2024-01-12 修回日期:2024-02-01 出版日期:2024-12-15 发布日期:2025-02-08
  • 通讯作者: 白雁
  • 作者简介:*白雁(1979—),女,研究员,主要从事卫星海洋遥感和海洋碳循环遥感研究,E-mail:baiyan@sio.org.cn
    谭亦杨(1998—),女,湖北省武汉市人,主要从事南极海洋环境遥感研究,E-mail:yiyangtan@sjtu.edu.cn
  • 基金资助:
    国家海洋局极地考察办公室项目(IRASCC-01-01-03A);国家自然科学基金(42176177)

Antarctic krill habitat suitability modeling based on timing parameters and long-term change analysis: A case study in the Cosmonauts Sea and D’Urville Sea

TAN Yiyang1,2,3(), BAI Yan1,2,3,*(), LI Teng2,3, ZHENG Xinyu1,2,3, ZHANG Yinxue4, ZHANG Yifan1,2,3   

  1. 1. School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
    2. Second Institute of Oceanography, MNR, Hangzhou 310012, China
    3. State Key Laboratory of Satellite Ocean Environment Dynamics, Hangzhou 310012, China
    4. College of Oceanography, Hohai University, Nanjing 210023, China
  • Received:2024-01-12 Revised:2024-02-01 Online:2024-12-15 Published:2025-02-08
  • Contact: BAI Yan

摘要:

南极磷虾(Euphausia superba)是维持南大洋生物多样性的关键物种,是南大洋的重点保护与限制捕捞对象。在气候变化对南大洋生态环境持续显著影响的背景下,亟需了解南极磷虾的时空分布、变化趋势及其栖息地适宜性。本文基于南极磷虾出现记录及长时序遥感与再分析数据,利用藻华物候与海冰消长的时序特征参数及相关环境参数,构建了宇航员海与迪尔维尔海南极磷虾栖息地适宜性的最大熵模型(Maxent)。研究发现,相较于常规单一时刻环境参数,时序特征参数更适合用于南极磷虾栖息地适宜性评估。基于Maxent模型,反演了两个典型海域超过20年的南极磷虾出现时间和频率变化序列,并通过分析多个环境参数的年际变化趋势进行机制解释。南极磷虾出现时的环境参数显示,宇航员海整体叶绿素质量浓度低于迪尔维尔海,无冰期更短,温度更低,南极磷虾出现时间更晚,且主要由沿岸区域的南极磷虾幼体与年轻个体构成。在1997—2019年,宇航员海沿岸区域磷虾出现时间逐渐提前,出现总天数逐年增多,主要是由于沿岸区域藻华起始时间提前,同时叶绿素质量浓度增加也为南极磷虾幼体提供了更充足的食物来源。迪尔维尔海受海水增温、无冰期缩短、叶绿素质量浓度降低等环境变化趋势的影响,该区域磷虾成熟个体或向更适宜环境迁移,南极磷虾每年出现总天数下降。在模型构建基础上,本研究首次获得了宇航员海与迪尔维尔海的南极磷虾长时序分布数据,可为了解气候变化对南大洋生物的影响、南大洋保护区规划与渔业管理提供科学依据。

关键词: 南极磷虾, 栖息地适宜性, 海冰密集度, 卫星遥感, 时间序列参数, 最大熵模型, 宇航员海, 迪尔维尔海

Abstract:

Antarctic krill (Euphausia superba) is a key species sustaining the biodiversity of the Southern Ocean and is a protected and restricted fishing target. In the context of significant impacts of climate change on the ecological environment of the Southern Ocean, it is urgent to understand the spatio-temporal distribution, change trends, and habitat suitability of Antarctic krill. In this study, based on Antarctic krill presence records and time series satellite and reanalysis data, a Maxent model for habitat suitability in the Cosmonauts Sea and the D’Urville Sea were constructed using timing parameters of phytoplankton phenology and sea-ice dynamics, along with related environmental parameters. It was found that timing parameters were more suitable for assessing habitat suitability for Antarctic krill compared to conventional environmental parameters. Using the Maxent model, the data over 20 years on the occurrence time and frequency of Antarctic krill in these two study areas were retrieved, and the mechanisms through the interannual trends of multiple environmental parameters were analyzed. Environmental parameters at the time of krill occurrence showed that the overall chlorophyll a mass concentration in the Cosmonauts Sea was lower than that in the D’Urville Sea, with a shorter ice-free period, lower temperatures, and later krill presence dates primarily composed of larval and young individuals along the coast. From 1997 to 2019, the presence time of krill in the coastal Cosmonauts Sea gradually advanced, and the number of presence days increased, mainly due to earlier onset of algal blooms, while increased chlorophyll a mass concentration provided more abundant overwintering food for krill larvae. In the D’Urville Sea, influenced by warming water, shortened ice-free period, and reduced chlorophyll a mass concentration, mature krill may migrate to a more suitable environment, leading to a decline in annual presence frequency. Based on the constructed habitat suitability model, this study showed the long-term distribution of Antarctic krill occurrence in the Cosmonauts Sea and the D’Urville Sea for the first time, which can help to understand the impact of climate change on the ecological environment in the Southern Ocean, and the planning of conservation areas and fishery management in the Southern Ocean.

Key words: Antarctic krill (Euphausia superba), habitat suitability, sea ice concentration, satellite remote sensing, timing parameters, maximum entropy model (Maxent), Cosmonauts Sea, D’Urville Sea

中图分类号: