| 引用本文: | 杨适萌,郭术津,郑珊,朱明亮,赵永芳,孙晓霞.胶州湾网采浮游植物碳生物量长期变化特征及其影响因素[J].海洋科学,2025,49(4):15-24. |
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| 胶州湾网采浮游植物碳生物量长期变化特征及其影响因素 |
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杨适萌1,2, 郭术津1,3, 郑珊1,3, 朱明亮1,3, 赵永芳1,3, 孙晓霞1,3,4,2
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1.中国科学院海洋研究所 胶州湾海洋生态系统国家野外科学观测研究站, 山东 青岛 266071;2.中国科学院大学, 北京 100049;3.青岛海洋科技中心 海洋生态与环境科学功能实验室, 山东 青岛 266237;4.中国科学院海洋大科学研究中心, 山东 青岛 266071
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| 摘要: |
| 为了进一步分析全球变化背景下近海浮游植物长期变化对生态系统演变与碳循环的影响, 本研究以近海典型海湾胶州湾为研究区域, 对比研究了2004—2016年期间胶州湾不同区域网采浮游植物碳生物量的长期变化特征及影响因素。结果表明, 胶州湾不同区域浮游植物年平均碳生物量水平存在显著差异(P<0.05), 湾北年平均碳生物量((4.22±3.59) mgC/m3)显著高于湾中((2.34±1.01) mgC/m3)和湾外((2.52±1.79) mgC/m3)。不同区域浮游植物年平均碳生物量的变化趋势也有明显差异。湾北年平均碳生物量呈现下降趋势, 硅藻是主要贡献者。湾中年平均碳生物量先下降后上升, 硅藻的贡献一直占主导, 但甲藻贡献度有所增加。湾外甲藻/硅藻碳生物量比值呈上升趋势, 表明甲藻对碳生物量的贡献增加。比较不同区域的平均碳生物量季节变化模式, 结果表明湾北浮游植物平均碳生物量为夏季最高, 显著高于其他季节(P<0.05); 湾中和湾外则在冬季达到峰值, 显著高于其他季节(P<0.05)。温度、磷酸盐和溶解无机氮是影响胶州湾网采浮游植物碳生物量变化的关键因素。本研究为进一步理解胶州湾生态系统的变化趋势提供了新的视角, 为未来近海生态系统的监测与管理提供了科学依据。 |
| 关键词: 浮游植物|胶州湾|碳生物量|长期变化|环境因子 |
| DOI：10.11759/hykx20240826001 |
| 分类号:Q948.8 |
| 基金项目:崂山实验室项目(LSKJ202204005);中国科学院国际合作计划项目(121311KYSB20190029);国家自然科学基金项目(32371619,U2006206);中国科学院国际合作计划项目(133137KYSB20200002) |
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| Long-term variations in the net-phytoplankton carbon biomass of Jiaozhou Bay and their influencing factors |
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YANG Shimeng1,2, GUO Shujin1,3, ZHENG Shan1,3, ZHU Mingliang1,3, ZHAO Yongfang1,3, SUN Xiaoxia1,3,4,2
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1.Jiaozhou Bay Marine Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences (IOCAS), Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Laboratory of Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao 266237, China;4.Center for Ocean MegaScience, Chinese Academy of Sciences, Qingdao 266071, China
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| Abstract: |
| To further analyze the impact of long-term changes in offshore phytoplankton on ecosystem evolution and carbon cycling under global change, we chose Jiaozhou Bay as a typical coastal area in the Chinese seas. We also investigated the long-term variations in the carbon biomass of phytoplankton and their environmental factors in different regions of Jiaozhou Bay from 2004 to 2016. The results revealed significant variations in annual mean carbon biomass across regions (P<0.05). The annual mean carbon biomass in the northern region of the bay (NB) was higher ((4.22 ± 3.59) mgC/m3) than in the central region (CB) ((2.34 ± 1.01) mgC/m3) and the outer region of the bay (OB) ((2.52 ± 1.79) mgC/m3). The annual mean carbon biomass of phytoplankton also showed distinct trends in the three typical regions. It declined in the NB, with diatoms as the primary contributor. In CB, the biomass initially decreased before increasing again, with diatoms remaining the dominant contributors, although the contribution of dinoflagellates grew over time. The ratio of dinoflagellate to diatom carbon biomass in OB increased, indicating a rising contribution from dinoflagellates. Seasonal patterns further highlighted regional differences. In NB, the phytoplankton carbon biomass peaked in summer and was markedly higher than that in other seasons (P<0.05). In CB and OB, the highest carbon biomass was recorded in winter, remarkably exceeding that in other seasons (P<0.05). Temperature, phosphate, and dissolved inorganic nitrogen were identified as the key factors influencing these variations. This study provides a new perspective on the dynamics of the Jiaozhou Bay ecosystem and provides scientific support for future monitoring and management of this offshore ecosystem. |
| Key words: phytoplankton|Jiaozhou Bay|carbon biomass|long-term changes|environmental factors |
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