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史华明,王翔,马玉,蔡钰灿,许欣.2017-2018年北部湾东北部海湾营养盐的时空分布特征[J].广西科学,2023,30(4):663-671. [点击复制]
- SHI Huaming,WANG Xiang,MA Yu,CAI Yucan,XU Xin.Temporal and Spatial Distribution Characteristics of Nutrients in the Northeastern Beibu Gulf from 2017 to 2018[J].Guangxi Sciences,2023,30(4):663-671. [点击复制]
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| 2017-2018年北部湾东北部海湾营养盐的时空分布特征 |
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史华明1,2, 王翔1,2, 马玉1,2, 蔡钰灿1,2, 许欣1,2
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| (1.国家海洋局南海调查技术中心, 广东广州 510300;2.自然资源部海洋环境探测技术与应用重点实验室, 广东广州 510300) |
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| 摘要: |
| 近海营养盐浓度显著受到人类活动和自然条件等因素影响，且会对海洋生态系统造成一定程度的干扰。本文根据2017-2018年北部湾东北部海湾秋季、冬季、春季和夏季4个季节的溶解态营养盐及其他环境参数数据，分析调查海域溶解态营养盐的时空分布、结构特征和变化趋势，并讨论该海域的营养盐限制因子。研究结果表明：溶解态营养盐分布表现为近岸高、远岸低的特点，高值区主要集中在铁山港、英罗港以及安铺港湾口。溶解无机氮 (DIN) 浓度为1.50-28.63 μmol/L，夏季浓度最高。磷酸盐 (SRP) 及硅酸盐(DSi)平均浓度均以秋季最高，全年SRP浓度为0.02-0.94 μmol/L，DSi浓度为1.03-18.19 μmol/L。调查海域的DIN、DSi受陆源输入的影响较大；夏季SRP的消耗速度大于输入速度，导致夏季SRP浓度较低。调查海域氮磷化(N/P)、硅磷比(Si/P)值均高于Redfield比值，其中夏季N/P平均值达175.3±94.5，SRP是该海域的主要营养盐限制因子。调查海域DIN季节平均浓度均低于钦州湾、珍珠湾和廉州湾3个海湾相应季节的DIN浓度，夏季SRP平均浓度低于廉州湾、钦州湾和珍珠湾，自20世纪80年代以来铁山港营养盐浓度呈现先升后降的趋势。 |
| 关键词: 北部湾 营养盐 时空分布 环境因子 |
| DOI：10.13656/j.cnki.gxkx.20230928.005 |
| 投稿时间：2022-06-30修订日期：2022-08-02 |
| 基金项目:自然资源部南海局科技发展基金项目(202205)和广东省平台基地及科技基础条件建设项目(2021B1212050025)资助。 |
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| Temporal and Spatial Distribution Characteristics of Nutrients in the Northeastern Beibu Gulf from 2017 to 2018 |
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SHI Huaming1,2, WANG Xiang1,2, MA Yu1,2, CAI Yucan1,2, XU Xin1,2
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| (1.South China Sea Marine Survey and Technology Center, State Oceanic Administration, Guangzhou, Guangdong, 510300, China;2.Key Laboratory of Marine Environmental Survey Technology and Application, Ministry of Natural Resources, Guangzhou, Guangdong, 510300, China) |
| Abstract: |
| The concentration of nutrients in coastal waters was significantly influenced by factors such as human activities and natural conditions,and would cause a certain degree of interference to marine ecosystems.Based on the data of dissolved nutrient and other environmental parameters obtained in autumn,winter,spring and summer in the northeastern Beibu Gulf from 2017 to 2018,the spatial and temporal distribution,structural characteristics and changing trend of dissolved nutrients in the sea area were analyzed,and the limiting factors of nutrients in the sea area were discussed.The results showed that the distribution of dissolved nutrients was characterized by high in the coastal area and low in the offshore area,and the high-value areas were mainly concentrated in the Tieshangang Bay and the sea area near Yingluogang and Anpugang.The concentration of Dissolved Inorganic Nitrogen (DIN) was 1.50-28.63 μmol/L,with the highest content in summer.The average concentrations of Reactive Phosphate (SRP) and Dissolved Silicate (DSi) were the highest in autumn.The annual concentration of SRP was 0.02-0.94 μmol/L,and the content of DSi was 1.03-18.19 μmol/L.The DIN and DSi in the survey area were greatly affected by terrestrial input.The consumption rate of SRP in summer was greater than the input rate,resulting in lower SRP concentration in summer.The values of N/P and Si/P were higher than the Redfield ratio,and the average value of N/P in summer was 175.3±94.5.SRP was the main nutrient limiting factor in the sea area.The seasonal average concentration of DIN in the survey area was lower than that in Qinzhou Bay,Zhenzhu Bay and Lianzhou Bay.The average concentration of SRP in summer was lower than that in Lianzhou Bay,Qinzhou Bay and Zhenzhu Bay.Since the 1980s,the nutrient concentration in Tieshangang Bay had shown a trend of increasing first and then decreasing. |
| Key words: Beibu Gulf nutrients spatio-temporal variation environmental factors |
