赤潮异弯藻对CO2浓度、温度和营养盐变化的响应

doi:10.3969/j.issn.1000-5641.2023.03.011

华东师范大学学报（自然科学版） ›› 2023, Vol. 2023 ›› Issue (3): 108-117.doi: 10.3969/j.issn.1000-5641.2023.03.011

赤潮异弯藻对CO₂浓度、温度和营养盐变化的响应

杨安强¹, 赵丽侠^2,³, 宋淑贞¹, 刘倢⁴, 何彦龙^2,⁵, 王艳娜^1,*()

1. 华东师范大学河口海岸学国家重点实验室, 上海　200241
2. 自然资源部东海生态中心, 上海　201206
3. 自然资源部海洋生态监测与修复技术重点实验室, 上海　201206
4. 卑尔根大学生物科学系, 卑尔根　N-5020, 挪威
5. 长江三角洲河口湿地生态系统教育部/上海市野外科学观测研究站, 上海　202162

收稿日期:2021-07-26 接受日期:2021-10-09 出版日期:2023-05-25 发布日期:2023-05-25
通讯作者: 王艳娜 E-mail:ynwang@sklec.ecnu.edu.cn
基金资助:
国家外专千人计划项目(WQ20133100150); 自然资源部海洋生态监测与修复技术重点实验室开放基金(MEMRT202109); 自然资源部海洋空间资源管理技术重点实验室开放基金(KF-2021-107); 长江三角洲河口湿地生态系统教育部/上海市野外科学观测研究站开放课题(K202002); 华东师范大学配套建设经费(2016RCDW01)

Growth response of Heterosigma akashiwo to the changes of CO₂ concentration, temperature and nutrient

Anqiang YANG¹, Lixia ZHAO^2,³, Shuzhen SONG¹, Jie LIU⁴, Yanlong HE^2,⁵, Yanna WANG^1,*()

1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai　200241, China
2. East China Sea Environmental Monitoring Center, State Oceanic Administration, Shanghai　201206, China
3. East China Sea Ecological Center, the Ministry of Natural Resources, Shanghai　201206, China
4. Department of Biological Sciences, University of Bergen, Bergen　N-5020, Norway
5. Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai Science and Technology Committee, Shanghai　202162

Received:2021-07-26 Accepted:2021-10-09 Online:2023-05-25 Published:2023-05-25
Contact: Yanna WANG E-mail:ynwang@sklec.ecnu.edu.cn

摘要/Abstract

摘要：

赤潮异弯藻 (Heterosigma akashiwo) 是爆发有害藻华的常见藻种, 也是危害海洋渔业的赤潮生物之一, 广泛分布在全球近岸海域. 随着大气CO₂浓度升高、全球变暖及人类活动导致陆源营养盐入海通量的增加, 在河口及近岸海域频发藻华. 本研究通过调控营养盐浓度、CO₂浓度和温度, 探讨了当前气候变化趋势下赤潮异弯藻生长对营养盐变化的响应. 结果显示, 在所有CO₂浓度和温度条件下, 低磷组的赤潮异弯藻细胞密度和比生长速率均显著低于高磷组的; 当CO₂浓度升高时, 赤潮异弯藻细胞最大密度和比生长速率均显著提高; 当同时升高CO₂浓度和温度时, 其比生长速率再次显著增加; 赤潮异弯藻的生长对不同CO₂浓度和温度的响应在4种营养条件下类似. 该研究表明, 磷浓度是控制赤潮异弯藻生长的主要因子, 在未来气候条件下赤潮异弯藻爆发藻华的强度和风险不断增加. 控制营养盐的增加, 特别是磷酸盐浓度, 可能是防控赤潮异弯藻爆发的关键手段之一. 该研究结果可为近岸水域的海洋生态管理提供参考.

关键词: 有害藻华, 赤潮异弯藻, CO₂浓度, 气候变暖, 营养盐

Abstract:

Heterosigma akashiwo is one of the species of harmful algal blooms (HABs) threatening marine ecosystems and the fishing industry across coastal waters worldwide. With increasing global levels of atmospheric CO₂ and global warming, HABs have increased in prevalence, duration, and geographic span; this phenomenon has been further stressed by intensified anthropogenic influences, such as eutrophication. Through controlled experiments with different nutrients, CO₂ concentrations, and temperatures, our study aimed to understand the response of H. akashiwo to different nutrients with changes in climate. In all simulated CO₂ and temperature scenarios, both cell density and the specific growth rate of H. akashiwo in the low phosphorus groups were significantly lower than those in the high phosphorus groups. Furthermore, the maximum cell density and specific growth rate of H. akashiwo were significantly enhanced by increased CO₂, while the specific growth rate was accelerated by the dual effect of increased CO₂ levels and temperature. The growth response of H. akashiwo to CO₂ and temperature was similar between different nutrient treatments. Taken together, the results indicate that phosphorus concentration could be the major factor controlling the growth of H. akashiwo, and the intensity and risk of H. akashiwo blooming in the future is increasing. Hence, controlling the increase of nutrients, particularly phosphate, could be a critical pathway to decrease the occurrence of H. akashiwo blooms. In summary, our case study provides scientific support for marine ecological management of HABs.

Key words: harmful algal blooms, Heterosigma akashiwo, CO₂ concentration, warming, nutrient

中图分类号:

P735

杨安强, 赵丽侠, 宋淑贞, 刘倢, 何彦龙, 王艳娜. 赤潮异弯藻对CO₂浓度、温度和营养盐变化的响应[J]. 华东师范大学学报（自然科学版）, 2023, 2023(3): 108-117.

Anqiang YANG, Lixia ZHAO, Shuzhen SONG, Jie LIU, Yanlong HE, Yanna WANG. Growth response of Heterosigma akashiwo to the changes of CO₂ concentration, temperature and nutrient[J]. Journal of East China Normal University(Natural Science), 2023, 2023(3): 108-117.

图/表 6

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时间	F 值							p 值
时间	N	P	Climate	N × P	N × Climate	P × Climate	N × P × Climate	N	P	Climate	N × P	N × Climate	P × Climate	N × P × Climate
第0天	0.367	0.719	0.521	0.536	0.298	0.300	1.285	0.551	0.405	0.600	0.474	0.745	0.744	0.295
第1天	0.664	1.529	208.996	6.341	0.227	2.099	11.931	0.423	0.228	< 0.001***	0.019*	0.799	0.144	< 0.001***
第2天	7.052	6.296	459.440	3.756	3.163	5.73	4.325	0.014*	0.019*	< 0.001***	0.064	0.060	0.009**	0.025*
第3天	0.802	8.421	81.662	2.582	0.245	9.941	1.487	0.379	0.008**	< 0.001***	0.121	0.784	< 0.001***	0.246
第4天	0.045	30.953	1.492	6.708	0.408	5.963	0.254	0.834	< 0.001***	0.245	0.016*	0.669	0.008**	0.778
第5天	18.974	145.600	18.732	0.006	0.253	14.562	1.609	< 0.001***	< 0.001***	< 0.001***	0.936	0.778	< 0.001***	0.221
第6天	5.524	78.774	18.032	2.198	0.024	0.156	0.674	0.027*	< 0.001***	< 0.001***	0.151	0.977	0.857	0.519
第7天	3.828	101.263	61.336	5.960	2.590	4.006	3.306	0.062^?	< 0.001***	< 0.001***	0.022*	0.096	0.032*	0.054
第8天	20.238	66.131	100.180	4.928	1.305	2.138	0.136	< 0.001***	< 0.001***	< 0.001***	0.036*	0.289	0.139	0.873
第9天	5.299	85.122	108.113	0.921	2.757	8.403	2.553	0.030*	< 0.001***	< 0.001***	0.347	0.084	0.002*	0.098

因子	F值	p值
N	0.498	0.487
P	20.277	< 0.001***
Climate	116.444	< 0.001***
N × P	0.588	0.451
N × Climate	0.868	0.433
P × Climate	0.725	0.495
N × P × Climate	0.069	0.933

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赤潮异弯藻对CO₂浓度、温度和营养盐变化的响应

Growth response of Heterosigma akashiwo to the changes of CO₂ concentration, temperature and nutrient

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