颗石藻指示的东北印度洋90°E海岭末次冰期以来海洋初级生产力变化*

doi:10.11978/2024244

热带海洋学报 ›› 2026, Vol. 45 ›› Issue (1): 131-139.doi: 10.11978/2024244CSTR: 32234.14.2024244

颗石藻指示的东北印度洋90°E海岭末次冰期以来海洋初级生产力变化^*

苏翔¹^,²(), 向荣¹^,², 张兰兰¹^,², 罗传秀¹^,², 刘建国¹^,², 万随¹^,²(), 黎在柜³, NILUFAR Yasmin Liza¹^,²^,⁴

¹热带海洋环境与岛礁生态全国重点实验室(中国科学院南海海洋研究所), 广东广州 511458
²边缘海与大洋地质实验室(中国科学院南海海洋研究所), 广东广州 511458
³广州大学地理科学与遥感学院, 广东广州 510006
⁴中国科学院大学, 北京 100049

收稿日期:2024-12-31 修回日期:2025-01-08 出版日期:2026-01-10 发布日期:2026-01-30
通讯作者: 万随。email: wansui@scsio.ac.cn
作者简介:
苏翔(1984—), 男, 副研究员, 主要从事微体化石与古海洋学研究。email: suxiang@scsio.ac.cn
*致谢: 本研究的数据及样品采集得到国家自然科学基金共享航次计划项目的资助, 该航次(航次编号: NORC2023-10+NORC2023-303)由中国科学院南海海洋研究所“实验6”号科考船实施, 在此一并致谢
基金资助:
国家自然科学基金面上项目(42476066); 国家自然科学基金面上项目(42176082); 广东省基础与应用基础研究基金(2023A1515011955); 国家自然科学基金共享航次计划项目(42249910); 国家自然科学基金共享航次计划项目(41349910)

Evolution of marine primary productivity on the 90°E Ridge in the northeastern Indian Ocean since the Last Glacial Period: Insights from coccolith records^⁎

SU Xiang¹^,²(), XIANG Rong¹^,², ZHANG Lanlan¹^,², LUO Chuanxiu¹^,², LIU Jianguo¹^,², WAN Sui¹^,²(), LI Zaigui³, NILUFAR Yasmin Liza¹^,²^,⁴

¹State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 511458, China
²Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 511458, China
³School of Geography and Remote Sensing, Guangzhou University, Guangzhou 510006, China
⁴University of Chinese Academy of Sciences, Beijing 100049, China

Received:2024-12-31 Revised:2025-01-08 Online:2026-01-10 Published:2026-01-30
Contact: WAN Sui. email: wansui@scsio.ac.cn
Supported by:
National Natural Science Foundation of China(42476066); National Natural Science Foundation of China(42176082); Guangdong Basic and Applied Basic Research Foundation(2023A1515011955); Shiptime Sharing Project of National Natural Science Foundation of China (NSFC)(42249910); Shiptime Sharing Project of National Natural Science Foundation of China (NSFC)(41349910)

摘要/Abstract

摘要：

东北印度洋气候和表层洋流受印度季风控制, 其海洋初级生产力是生态系统的基础, 连接着大气和海洋碳库, 是古海洋和碳循环研究的热点。本研究通过对东北印度洋90°E海岭I105A孔柱状沉积物中的颗石进行定量分析, 获得了末次冰期以来颗石绝对丰度与主要属种相对百分含量记录, 重建东北印度洋海洋初级生产力的变化规律。结果表明54ka以来该区海洋初级生产力经历3个阶段: 末次冰期较高、冰消期显著降低、全新世保持较低水平, 与孟加拉湾其他古生产力指标变化趋势基本一致。与印度洋古环境资料对比发现, 当印度夏季风增强时, 东北印度洋淡水输入增多, 海洋初级生产力降低, 揭示末次冰期以来印度夏季风降水及其导致的海水分层很可能是东北印度洋海洋初级生产力变化的主要驱动力, 并且受地球轨道岁差周期的调控。

关键词: 东北印度洋, 颗石藻, 初级生产力, 印度季风

Abstract:

The climate and surface currents of the northeastern Indian Ocean are controlled by the Indian Monsoon. Its marine primary productivity is the foundation of the ecosystem and connects the atmosphere and ocean carbon cycles. In this study, we carried out a quantitative analysis of coccolith from the marine sediments in Core I105A on the 90°E Ridge in the northeastern Indian Ocean. By examining variations in coccolith absolute abundance and the relative percentages of dominant coccolithophore species, we reconstructed marine primary productivity changes in the northeastern Indian Ocean since the Last Glacial Period. The results show that marine primary productivity in this area experienced three stages since last 54 ka: (1) relatively high during the last glaciation; (2) significantly decreased during the deglaciation; and (3) maintained at low levels during the Holocene. This pattern is generally consistent with the variations of other paleoproductivity proxies in the Bay of Bengal. Comparison with paleoenvironmental records from the Indian Ocean indicates that marine primary productivity decreased when freshwater input to the northeastern Indian Ocean increased due to intensified Indian Summer Monsoon. These findings imply that the evolution of marine primary productivity in the northeastern Indian Ocean since the last glaciation has most probably been driven by seawater stratification associated with Indian Summer Monsoon precipitation, a process regulated by the Earth orbital precession cycle as well.

Key words: northeastern Indian Ocean, coccolithophore, primary productivity, Indian Monsoon

中图分类号:

P736.221

苏翔, 向荣, 张兰兰, 罗传秀, 刘建国, 万随, 黎在柜, NILUFAR Yasmin Liza. 颗石藻指示的东北印度洋90°E海岭末次冰期以来海洋初级生产力变化^*[J]. 热带海洋学报, 2026, 45(1): 131-139.

SU Xiang, XIANG Rong, ZHANG Lanlan, LUO Chuanxiu, LIU Jianguo, WAN Sui, LI Zaigui, NILUFAR Yasmin Liza. Evolution of marine primary productivity on the 90°E Ridge in the northeastern Indian Ocean since the Last Glacial Period: Insights from coccolith records^⁎[J]. Journal of Tropical Oceanography, 2026, 45(1): 131-139.

图/表 4

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颗石藻指示的东北印度洋90°E海岭末次冰期以来海洋初级生产力变化^*

Evolution of marine primary productivity on the 90°E Ridge in the northeastern Indian Ocean since the Last Glacial Period: Insights from coccolith records^⁎

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颗石藻指示的东北印度洋90°E海岭末次冰期以来海洋初级生产力变化*

Evolution of marine primary productivity on the 90°E Ridge in the northeastern Indian Ocean since the Last Glacial Period: Insights from coccolith records⁎

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颗石藻指示的东北印度洋90°E海岭末次冰期以来海洋初级生产力变化^*

Evolution of marine primary productivity on the 90°E Ridge in the northeastern Indian Ocean since the Last Glacial Period: Insights from coccolith records^⁎