海洋学研究 ›› 2022, Vol. 40 ›› Issue (3): 142-152.DOI: 10.3969-j.issn.1001-909X.2022.03.013

• • 上一篇    

2021年8—9月北部湾叶绿素a分布特征及影响因子探究

  

  1. 1.自然资源部第二海洋研究所 自然资源部海洋生态系统动力学重点实验室,浙江 杭州 310012; 
    2.自然资源部第四海洋研究所 广西北部湾海洋资源环境与可持续发展重点实验室,广西 北海 536000; 
    3.广东海洋大学 海洋与气象学院 近海海洋变化与灾害预警实验室,广东 湛江 524088
  • 出版日期:2022-09-15 发布日期:2022-09-15
  • 通讯作者: 金海燕(1974—),女,研究员,主要从事海洋生物地球化学方面的研究,E-mail:jinhaiyan@sio.org.cn。
  • 作者简介:郑侦明(1996—),男,广东省茂名市人,主要从事海洋生物地球化学方面的研究,E-mail:424003135@qq.com。
  • 基金资助:
    国家自然科学基金共享航次计划2020年度北部湾科学考察实验研究(航次编号:NORC2021-11)(42049911)

Distribution characteristics of chlorophyll a and the exploration of its influencing factors in Beibu Gulf, August-September 2021

  • Online:2022-09-15 Published:2022-09-15

摘要: 叶绿素a(Chl a)作为浮游植物光合作用的主要色素,常被用来指示水体中浮游植物现存量。依托国家自然科学基金委共享航次计划2020年北部湾科学考察实验研究夏季航次数据,对2021年8—9月北部湾Chl a质量浓度进行分析,探讨其空间分布特征及影响因素。结果表明,北部湾8—9月海水Chl a质量浓度为0.03~10.59 μg/L(平均值为0.84 μg/L),其中,表层质量浓度为0.08~10.59 μg/L(平均值为0.97 μg/L),底层质量浓度为0.03~4.69 μg/L(平均值为0.99 μg/L)。结合遥感资料分析,在空间上,北部湾海域Chl a质量浓度大体呈现出近岸高远岸低的分布特征,高值区大多分布在广西近岸海域即北部湾北部,而北部湾中部和南部质量浓度相对较低。水体环境参数与Chl a的相关性分析指示水体氮限制是影响北部湾海域8—9月Chl a质量浓度的重要因子。


关键词: 北部湾, 叶绿素a, 氮限制, 水团

Abstract: Chlorophyll a (Chl a), as the main pigment of phytoplankton photosynthesis, is often used to indicate the existing amount of phytoplankton in water column. The concentration of Chl a in Beibu Gulf from August to September 2021 was analyzed and its spatial distribution characteristics and influencing factors were discussed based on the summer cruise of the Shiptime Sharing Program on 2020 Beibu Gulf Scientific Research Expedition. The results showed that the mass concentration of Chl a ranged from 0.03 to 10.59 μg/L with an average value of 0.84 μg/L, among which the surface layer mass concentration ranged from 0.08 to 10.59 μg/L (average 0.97 μg/L) and the bottom layer mass concentration ranged from 0.03 to 4.69 μg/L (average 0.99 μg/L). Combined with the analysis of remote sensing data, the spatial distribution of Chl a mass concentration in Beibu Gulf was generally high in the nearshore and low in the offshore area. The high value area was mostly distributed in the nearshore area of Guangxi, namely the northern part of Beibu Gulf, while the mass concentration in the central and southern part of Beibu Gulf was relatively low. The correlation analysis between water environmental parameters and Chl a indicated that water nitrogen limitation was an important factor affecting the mass concentration of Chl a in Beibu Gulf from August to September.


Key words: Beibu Gulf, chlorophyll a, nitrogen limitation, water mass

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