微小辐环藻, 我国硅藻藻华的新记录种

doi:10.11978/2017089

热带海洋学报 ›› 2018, Vol. 37 ›› Issue (4): 24-28.doi: 10.11978/2017089CSTR: 32234.14.2017089

微小辐环藻, 我国硅藻藻华的新记录种

郭晓慧¹(), 涂志刚², 陈丹丹², 郭雅琼¹, 李扬¹()

1. 华南师范大学生命科学学院, 广州市亚热带生物多样性与环境生物监测重点实验室, 广东广州 510631
2. 海南省海洋渔业科学院, 海南海口 571126

收稿日期:2017-08-21 修回日期:2017-09-30 出版日期:2018-07-20 发布日期:2018-07-16
作者简介:
作者简介：郭晓慧(1993—), 女, 汉族, 山西省运城市人, 硕士研究生, 主要从事藻类学研究。E-mail: guoxiaohuizi@126.com
基金资助:
国家自然科学基金(31570205、31370235);广州市科技计划项目(201607010370)

Actinocyclus exiguus, a newly discovered diatom bloom-causative species in China

Xiaohui GUO¹(), Zhigang TU², Dandan CHEN², Yaqiong GUO¹, Yang LI¹()

1. Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, College of Life Science, South China Normal University, Guangzhou 510631, China
2. Hainan Academy of Ocean and Fisheries Sciences, Haikou 571126, China

Received:2017-08-21 Revised:2017-09-30 Online:2018-07-20 Published:2018-07-16
Supported by:
Natural Science Foundation of China (31570205, 31370235);Science and Technology Foundation of Guangzhou (201607010370)

摘要/Abstract

摘要：

2016年5月4日—10日, 海南省海口市红城湖发生了一起硅藻藻华。为明确该起藻华的肇事生物, 于藻华期间采集了水体样品, 经过光镜和电镜下的形态学观察, 确认藻华原因种为微小辐环藻Actinocyclus exiguus Fryxell & Semina, 该种是我国硅藻的新记录种, 其藻华在我国也是首次报道。微小辐环藻隶属于中心纲硅藻, 细胞单独生活或形成胶质状群体, 细胞个体较小, 壳面直径为6.4~11.1μm, 有2个或3个壳缘唇形突, 壳缘处具有眼斑结构。水体中丰富的氨氮(平均值为2880μg•L^-1)和较高的水温(31℃)条件可能是藻华事件的环境诱因。藻华事件导致红城湖40余吨花鰶死亡。经过鱼体检测, 初步排除因为藻毒素、鱼鳃机械性损伤或水体缺氧而致死的可能, 水体盐度剧烈变化等物理应激反应导致鱼类死亡的可能性较大。

关键词: 微小辐环藻, 硅藻, 藻华, 新记录

Abstract:

To clarify the causative species of a diatom bloom occurred in Hongcheng Lake of Haikou City, Hainan Province during 4-10 May 2016, several water samples were collected from bloom regions. Based on the morphological features under light and electron microscopy, the causative species was identified as Actinocyclus exiguus Fryxell & Semina, a newly recorded diatom species in China. Its bloom was also new in China, and was the second case globally. Actinocyclus exiguus belongs to centricae diatom, and their cells are usually solitary, or sometimes form colonies in mucilage. The cells are small in size, with diameter around 6.4~11.1 µm. There are 2~3 rimoportulae at valve margin, as well as a pseudonodulus. It is speculated that rich density of ammonia-nitrogen (average of 2880 µg•L^-1) and high water temperature (average of 31℃) could be important induced factors for this A. exiguus bloom. About 40 tons of dead fishes (Clupanodon thrissa) was reported during the bloom; and algal toxins, mechanical injury and dissolved oxygen in the water were excluded as the mortal factors, after body check of dead fishes. Physical stress reactions, such as acute change of salinity, might be responsible for the death of the fishes.

Key words: Actinocyclus exiguus, diatom, bloom, new record

中图分类号:

P735.531

郭晓慧, 涂志刚, 陈丹丹, 郭雅琼, 李扬. 微小辐环藻, 我国硅藻藻华的新记录种[J]. 热带海洋学报, 2018, 37(4): 24-28.

Xiaohui GUO, Zhigang TU, Dandan CHEN, Yaqiong GUO, Yang LI. Actinocyclus exiguus, a newly discovered diatom bloom-causative species in China[J]. Journal of Tropical Oceanography, 2018, 37(4): 24-28.

图/表 1

参考文献 8

1	李扬, 赵秋兰, 吕颂辉, 2013. 我国沿海线形亚属海链藻的形态学研究[J]. 水生生物学报, 37(1): 70-81.
	LI YANG, ZHAO QIULAN, LYU SONGHUI, 2013. Morphological studies of Thalassiosira species with linear areola array from china’s coastal waters[J]. Acta Hydrobiologica Sinica, 37(1): 70-81 (in Chinese with English abstract).
2	龙华, 刘薇, 赵刚, 2005. 3种鲇形目鱼的解剖学与血液学比较[J]. 水利渔业, 25(3): 6-7 (in Chinese).
3	吕淑果, 唐丹玲, 关学彬, 等, 2016. 海南岛近岸海域赤潮易发程度识别及重点监控区域划定[J]. 海洋环境科学, 35(4): 580-586.
	LYU SHUGUO, TANG DANLING, GUAN XUEBIN, et al, 2016. Identification of susceptibility of harmful algal blooms and determining the key monitoring zones in the coastal water of Hainan Island[J]. Marine Environmental Science, 35(4): 580-586 (in Chinese with English abstract).
4	木云雷, 宋广军, 2005. 水温和盐度对大菱鲆稚鱼存活的影响[J]. 水产科学, 24(12): 1-3.
	MU YUNLEI, SONG GUANGJUN, 2005. The effects of temperature and salinity on survival rate of juvenile turbot Scophthalmus maximus[J]. Fisheries Science, 24(12): 1-3 (in Chinese with English abstract).
5	FRYXELL G A, SEMINA H J, 1981. Actinocyclus exiguus sp. nov. from the southern parts of the Indian and Atlantic Oceans[J]. British Phycological Journal, 16(4): 441-448.
6	LU DOUDING, QI YUZAO, GU HAIFENG, et al, 2014. Causative species of harmful algal blooms in Chinese coastal waters[J]. Algological Studies, 145(1): 145-168.
7	SMYTHE-WRIGHT D, BOSWELL S, KIM Y N, et al, 2010. Spatio-temporal changes in the distribution of phytopigments and phytoplanktonic groups at the Porcupine Abyssal Plain (PAP) site[J]. Deep Sea Research Part II: Topical Studies in Oceanography, 57(15): 1324-1335.
8	TANG DANLING, DI BAOPING, WEI GUIFENG, et al, 2006. Spatial, seasonal and species variations of harmful algal blooms in the South Yellow Sea and East China Sea[J]. Hydrobiologia, 568(1): 245-253.

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微小辐环藻, 我国硅藻藻华的新记录种

Actinocyclus exiguus, a newly discovered diatom bloom-causative species in China

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