大亚湾夏季浮游群落生产代谢特征及其影响因素*

doi:10.11978/2020149

热带海洋学报 ›› 2021, Vol. 40 ›› Issue (6): 83-92.doi: 10.11978/2020149CSTR: 32234.14.2020149

大亚湾夏季浮游群落生产代谢特征及其影响因素^*

李尧^1,²(), 向晨晖^1,³, 江志坚^1,³, 宋星宇^1,^3,⁴()

1.中国科学院南海海洋研究所, 中国科学院热带海洋生物资源与生态重点实验室, 广东广州 510301
2.中国科学院大学, 北京100049
3.南方海洋科学与工程广东省实验室（广州）, 广东广州 511458
4.中国科学院南沙海洋生态环境实验站, 广东广州 510301

收稿日期:2020-12-24 修回日期:2021-03-04 出版日期:2021-11-10 发布日期:2021-03-04
通讯作者: 宋星宇
作者简介:李尧(1996—), 女, 湖北省荆州市人, 硕士研究生, 从事海洋生态学研究。email: liyao182@mails.ucas.ac.cn
基金资助:
国家自然科学基金(41890853);国家重点研发计划(2017YFC0506302);国家重点研发计划(2016YFC0502805);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0404);国家科技基础资源调查专项(2018FY10010005);国家重点基础研究发展计划(2015CB452904)

Production and metabolism characteristics of planktonic community and their influencing factors in Daya Bay during summer^*

LI Yao^1,²(), XIANG Chenhui^1,³, JIANG Zhijian^1,³, SONG Xingyu^1,^3,⁴()

1. Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
4. Nansha Marine Ecological and Environmental Research Station, Guangzhou 510301, China

Received:2020-12-24 Revised:2021-03-04 Online:2021-11-10 Published:2021-03-04
Contact: SONG Xingyu
Supported by:
National Natural Science Foundation(41890853);National Key Research and Development Program of China(2017YFC0506302);National Key Research and Development Program of China(2016YFC0502805);Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)(GML2019ZD0404);National Science and Technology Fundamental Resources Investigation Program of China(2018FY10010005);Key Project of Chinese National Programs for Fundamental Research and Development(2015CB452904)

摘要/Abstract

摘要：

2017年8月对大亚湾海域浮游群落初级生产、群落呼吸代谢及其平衡特征进行了研究, 并分析了其潜在环境影响因素以及对沿岸生态系统功能与健康的指示作用。研究结果表明, 大亚湾夏季海水表层呈自养状态, 而底层呈异养状态, 群落总初级生产力(gross primary productivity, GPP)、呼吸代谢速率(community respiration, CR)与净生产力(net commutnitiy production, NCP)在表层分别为1335.36±910.12、597.86±403.30和737.50±608.22mg C·m^-3·d^-1; 在底层分别为43.65±37.05、216.25±147.28和-160.27±137.01mg C·m^-3·d^-1。海湾整体呈自养状态, 水柱平均NCP为233.41±248.88mg C·m^-3·d^-1; 部分沿岸水域存在异养状态。1~200μm粒级浮游生物是GPP和CR的主要贡献者。相关性分析和主成分分析显示, NCP在表层受GPP和CR共同调控, 且与浮游植物生物量和营养盐正相关; 而在底层主要受CR影响, 且与盐度正相关。大亚湾夏季群落生产代谢平衡存在明显的水平和垂向变化, NCP的区域差异与潜在波动性对该海湾生态系统稳定性及健康状况有重要的指示作用。

关键词: 初级生产力, 群落呼吸, 代谢平衡, 大亚湾

Abstract:

In August 2017, the primary production, community respiration and their metabolic balance status of the planktonic community in Daya Bay were studied, and the potential environmental impact factors and their indicator effects on the function and health of the offshore ecosystem were analyzed. Our results showed that Daya Bay was autotrophic in surface water but heterotrophic in the bottom layer. The gross primary productivity (GPP), community respiration (CR) and net community production (NCP) were 1335±910.12, 597.86±403.30 and 737.50±608.22 mg C·m^-3·d^-1 in surface water and 43.65±37.05, 216.25±147.28 and -160.27±137.01 mg C·m^-3·d^-1 in the bottom, respectively. Overall, Daya Bay was autotrophic with an average NCP of 233.41±248.88 mg C·m^-3·d^-1 in the water column. Size-fractioned result of plankton community metabolism showed that plankton with the cell size of 1-200 μm was the main contributor to GPP and CR in surface water. Correlation analysis and principal component analysis showed that NCP was jointly regulated by GPP and CR in surface water and was positively correlated with phytoplankton biomass as well as nutrient concentration; in the bottom, it was mainly affected by CR and was positively correlated with salinity. The planktonic metabolism balance in Daya Bay during summer varied horizontally and vertically. The regional differences and potential fluctuations of NCP are important indicators of ecosystem stability and health in the bay.

Key words: Primary production, Community respiration, Metabolic balance, Daya Bay

中图分类号:

Q178.53

李尧, 向晨晖, 江志坚, 宋星宇. 大亚湾夏季浮游群落生产代谢特征及其影响因素^*[J]. 热带海洋学报, 2021, 40(6): 83-92.

LI Yao, XIANG Chenhui, JIANG Zhijian, SONG Xingyu. Production and metabolism characteristics of planktonic community and their influencing factors in Daya Bay during summer^*[J]. Journal of Tropical Oceanography, 2021, 40(6): 83-92.

图/表 7

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理化因子	表层		底层
理化因子	范围	均值±方差	范围	均值±方差
pH	7.84~8.49	8.18±0.18	7.75~8.35	8.05±0.17
DO/(mg·L^-1)	7.15~12.72	9.75±1.77	5.03~7.72	6.38±0.83
盐度/‰	15.73~32.16	27.1±5.13	31.5~34.04	32.96±0.95
温度/℃	28.3~30.6	29.78±0.79	25.9~28.7	27.57±0.89
PO3- 4/(μmol·L^-1)	0.04~1.49	0.39±0.51	0.04~0.54	0.2±0.14
SiO2- 3/(μmol·L^-1)	1.03~31.86	11.16±11.81	3.67~23.92	10.71±6.51
DIN/(μmol·L^-1)	1.75~85.1	14.12±23.03	2.78~12.27	4.72±2.41
N/P	6.35~116.31	39.89±31.25	11.16~106.95	31.81±24.5

环境参数	相关性指数
环境参数	表层NCP	表层CR	表层GPP	底层NCP	底层CR	底层GPP
Chl a	0.712**	0.96*	0.901**	-0.678*	0.672*	0.216
pH	-0.338	-0.379	-0.394	-0.127	0.127	0.043
DO	0.279	0.369	0.35	-0.354	0.222	-0.402
盐度	-0.667**	-0.417	-0.631*	0.694**	-0.736**	-0.41
温度	0.241	0.292	0.29	-0.633*	0.661*	0.332
PO3- 4	0.216	0.171	0.22	-0.062	0.009	-0.189
SiO2- 3	0.587*	0.539*	0.631*	-0.021	-0.075	-0.373
DIN	0.678**	0.381	0.622*	0.061	-0.081	-0.099

大亚湾夏季浮游群落生产代谢特征及其影响因素^*

Production and metabolism characteristics of planktonic community and their influencing factors in Daya Bay during summer^*

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大亚湾夏季浮游群落生产代谢特征及其影响因素*

Production and metabolism characteristics of planktonic community and their influencing factors in Daya Bay during summer*

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大亚湾夏季浮游群落生产代谢特征及其影响因素^*

Production and metabolism characteristics of planktonic community and their influencing factors in Daya Bay during summer^*