夏季闽东沿海水体中透明胞外聚合颗粒物的分布特征及影响因素

薛思佑; 胡佶; 韩正兵; 蔡昱明; 刘小涯; 冯毓彬; 于培松; 张慧娟; 潘建明

doi:10.12284/hyxb2021114

夏季闽东沿海水体中透明胞外聚合颗粒物的分布特征及影响因素

doi: 10.12284/hyxb2021114

自然资源部第二海洋研究所海洋生态系统动力学重点实验室，浙江杭州 310012

基金项目: 国家重点研发计划（2016YFC1402405，2018YFC1406304）

详细信息

作者简介:
薛思佑（1994—），男，浙江省温州市人，研究方向为海洋中碳的生物地球化学过程。E-mail：184839869@qq.com

通讯作者:
胡佶，男，副研究员，主要从事海洋生物地球化学研究。E-mail：huj@sio.org.cn

中图分类号: P734.2⁺3
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出版历程
- 收稿日期: 2019-12-06
- 修回日期: 2020-11-08
- 网络出版日期: 2021-05-19
- 刊出日期: 2021-08-25

Distribution patterns and influencing factors of transparent exopolymer particles (TEP) in the coast of eastern Fujian in summer

Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China

摘要

摘要: 透明胞外聚合颗粒物(TEP)在海洋微食物网和海洋碳循环中发挥着重要作用。本文针对夏季闽东沿海TEP的分布特征及影响因素进行研究。结果表明，闽东沿海TEP含量(以黄原胶为标准物质计算，后同)范围为25.2～935.5 μg/L，平均值为(201.8±177.9) μg/L。整体而言，TEP的分布表现为近岸高、远岸低，表层TEP含量相对于底层要低。相关性分析显示，研究海域TEP含量与浊度和营养盐(硅酸盐、磷酸盐、硝酸盐、亚硝酸盐和铵盐)浓度呈正相关，与pH、溶解氧浓度和小型浮游生物量呈负相关。分级叶绿素a结果显示，相对于其他尺寸浮游植物，调查海域小型浮游生物可能对TEP含量的贡献最大。相比于开阔大洋中TEP主控因素为浮游植物而言，夏季闽东海域TEP主要由浮游植物在衰退阶段产生，其分布主要受颗粒物再悬浮作用影响。该结果不仅进一步阐明了近岸海域与开阔大洋TEP影响因素的区别，并且对我国近海海域不同区域TEP分布研究空白进行了补充。
- 闽东沿海 /
- 透明胞外聚合颗粒物 /
- 浮游植物 /
- 分布特征 /
- 影响因素
Abstract: Transparent exopolymer particles (TEP) play an important role in the marine micro-food web and the marine carbon cycle. The distribution patterns and influencing factors of TEP in the coast of eastern Fujian in summer are investigated in this research. The results show that the contents of TEP (calculated with xanthan gum as the standard substance, the same below) in the coast of eastern Fujian ranged from 25.2 μg/L to 935.5 μg/L, with an average value of (201.8±177.9) μg/L. The level of TEP is high in the near-shore and low in the far-shore, which in surface layer is lower than that in bottom layer. Correlation analysis shows that TEP in the research area are positively correlated with turbidity, silicate, phosphate, nitrite, nitrate and ammonium concentration, negatively correlated with pH, DO concentration and Net-level phytoplankton. The results of chlorophyll a fractions show that Net-level phytoplankton in the area may contribute more to TEP than other size phytoplankton. Comparing with phytoplankton as the main controlling factor of TEP in the open ocean, TEP in the coast of eastern Fujian in summer are mainly produced by phytoplankton in the decline stage, and its distribution is mainly affected by the resuspension of particles. The results can not only further clarify the differences between the influencing factors of TEP in the coastal waters and the open ocean, but also supplement the gaps in the study of TEP distribution in different regions of coastal waters in China.
- the coast of eastern Fujian /
- transparent exopolymer particles /
- phytoplankton /
- distribution characteristics /
- influencing factors

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图 1 2019年闽东沿海夏季采样站位

Fig. 1 The sampling stations in the coast of eastern Fujian in summer of 2019

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图 2 2019年闽东沿海夏季TEP分布

a. M01−M04站位断面；b. M08−M05站位断面；c. M09−M12站位断面；d. M16−M13站位断面；e. 表层；f. 底层

Fig. 2 The distribution of TEP in the coast of eastern Fujian in summer of 2019

a. M01−M04 sections; b. M08−M05 sections; c. M09−M12 sections; d. M16−M13 sections; e. surface layer; f. bottom layer

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图 3 2019年闽东沿海夏季POC分布

a. M01−M04站位断面；b. M08−M05站位断面；c. M09−M12站位断面；d. M16−M13站位断面；e. 表层

Fig. 3 The distribution of POC in the coast of eastern Fujian in summer of 2019

a. M01−M04 sections; b. M08−M05 sections; c. M09−M12 sections; d. M16−M13 sections; e. surface layer

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图 4 2019年闽东沿海夏季Chl a浓度分布

a. M01−M04站位断面；b. M08−M05站位断面；c. M09−M12站位断面；d. M16−M13站位断面；e. 表层

Fig. 4 The distribution of Chl a concentration in the coast of eastern Fujian in summer of 2019

a. M01−M04 sections; b. M08−M05 sections; c. M09−M12 sections; d. M16−M13 sections; e. surface layer

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图 5 闽东沿海叶绿素a粒径相对组成结构

Fig. 5 Size fractions of Chl a in the coast of eastern Fujian

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图 6 闽东沿海各参数的相关性

a. TEP与各参数的相关性；b. TEP含量/Chl a浓度与各参数的相关性；c. TEP对POC的贡献率与各参数的相关性；*表示p<0.05，**表示p<0.01

Fig. 6 Correlation of various parameters along the the coast of eastern Fujian

a. Correlation between TEP and various parameters; b. correlation between TEP content/Chl a concentration and various parameters; c. correlation between the contribution rate of TEP to POC and various parameters; * represents p<0.05，** represents p<0.01

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图 7 闽东沿海遥感Chl a浓度数据

红粗线表示调查的时间段（2019年7月24−27日）；M01站位为藻华后期，M04站位为藻华时期；M01−M04站位代表近岸到远岸的变化趋势；M01、M08、M09和M16站位代表近岸从北向南变化趋势

Fig. 7 Remote sensing data of of Chl a concentration in the coast of eastern Fujian

The red bold line represents the time period of the survey（July 24−27, 2019）; Station M01 is in the later period of algal blooms, and M04 is in the period of algal blooms; the M01−M04 stations represent the changes from near-shore to far-shore; the stations M01, M08, M09, and M16 represent the changes of near-shore from north to south

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表 1 夏季闽东海域TEP及其他环境参数

Tab. 1 TEP and other environmental parameters in the coast of eastern Fujian

参数		表层			底层
参数		最大值	最小值	平均值	最大值	最小值	平均值
温度/℃		28.80	26.45	27.69±0.63	25.96	23.52	24.43±0.75
盐度		33.064	29.513	31.810±1.134	34.467	31.870	34.019±0.70
pH		8.25	7.94	8.10±0.10	8.09	7.95	8.00±0.04
DO浓度/（mg·L⁻¹）		9.18	5.53	7.15±1.21	7.02	3.98	4.91±0.79
浊度/NTU		21.5	1.3	7.6±6.5	115.7	11.9	36.0±29.5
硅酸盐浓度/（μmol·L⁻¹）		25.75	0.46	9.77±8.35	18.06	4.18	11.03±4.24
磷酸盐浓度/（μmol·L⁻¹）		0.80	0.02	0.20±0.22	0.64	0.21	0.41±0.12
亚硝酸盐浓度/（μmol·L⁻¹）		2.10	0.03	0.65±0.76	2.13	0.39	1.19±0.43
硝酸盐浓度/（μmol·L⁻¹）		20.73	1.420	8.30±6.40	15.94	4.46	8.09±2.75
铵盐浓度/（μmol·L⁻¹）		1.30	0.58	0.81±0.21	1.70	0.56	0.82±0.33
POC含量（mg·L⁻¹）		0.42	0.16	0.29±0.09	0.55	0.13	0.26±0.11
TEP含量/（μg·L⁻¹）		437.7	54.7	161.4±111.7	935.5	87.1	365.1±223.6
Chl a浓度/（mg·m⁻³）	Net	10.33	0.39	2.62±2.65	1.27	0.12	0.50±0.30
	Nano	9.68	0.25	3.33±3.13	7.76	0.18	1.50±2.24
	Pico	6.66	0.28	1.96±1.97	1.83	0.07	0.63±0.50
	总浓度	18.95	2.33	7.90±5.14	9.32	0.61	2.62±2.73
注：表层样本数为16，底层样本数为15。

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表 2 世界不同海域TEP含量分布

Tab. 2 Summary of TEP contents around the world

海域	季节	采样层次	TEP含量/（μg·L⁻¹）	TEP含量/Chl a浓度	文献
加州圣巴巴拉海峡	春	0～20 m	131～290	−	[36]
南极罗斯海	冬	0～150 m	0～2 800	89.1（均值）	[37]
大西洋东北部	夏	表层	≤ 124	49～104	[30]
南极半岛(南大洋)	春	0～200 m	0～48.9	40.9（均值）	[31]
日本Otsuchi海湾	春	0～15 m	24～2 321	125～144	[35]
以色列亚喀巴海湾	春	0～300 m	23～228	−	[32]
圣劳伦斯河口	夏、秋	0～320 m	15～1 548	−	[29]
Baie des Veys (英吉利海峡)	春、秋	表层	36.90～1 735.05	9.43～677.0	[34]
Lingreville-sur-mer（英吉利海峡）	春、秋	表层	26.45～3 604.52	8.81～1 239.13	[34]
印度多纳波拉湾	全年	3 m	1.3～149.1	−	[33]
闽东沿海	夏	0～40 m	25.2～935.5	5.25～636.37	本文
珠江口	夏	0 ～30 m	85.0～1 234.9	3.9～467.4	[21]
注：−代表TEP含量/Chl a浓度的计算值在原文献中缺失。

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