Effects of modified clay used for the control of harmful algal blooms on Alexandrium pacificum cysts

doi:10.1016/j.hal.2017.12.001

	Effects of modified clay used for the control of harmful algal blooms on Alexandrium pacificum cysts
	Zhang, Yue 1,2,3; Yu, Zhiming1,2,3 ; Song, Xiuxian1,2,3 ; Yuan, Yongquan1,3 ; Cao, Xihua1,3
	2018-02-01
发表期刊	HARMFUL ALGAE
ISSN	1568-9883
卷号	72 页码:36-45
通讯作者	Song, Xiuxian(songxx@qdio.ac.cn)
摘要	Cyst formation plays an important role in the resistance of dinofiagellates to adverse environments, and cyst germination is considered one of the causes of harmful algal blooms (HABs). Among the methods for mitigating HABs, modified clay (MC) is considered a promising strategy because of its high efficiency and low environmental impacts. The typical HAB species Alexandrium pacificum was focused on in this study to clarify the effects of MC on cyst formation and germination. The results showed that more than 90% of the vegetative cells were removed under the 0.6 g/L. MC treatment. The vegetative cell density was monitored over 90 d and increased slightly to the peak at 10 d after the cell removal experiment, but persistent growth was not observed. The amount of cysts was maximal at 20 d after removal, however, most of the cysts were temporary cysts that subsequently disappeared. After 80 d, all the remaining cysts were resting ones. The total density of resting cysts was higher under MC concentrations of 0.2 and 0.4 g/L and lower under concentrations of 0.6, 0.8 and 1.0 g/L compared with that in the control. The total formation rate of resting cysts was 29.6% in the control group, and the lowest formation rate in the experimental groups was 15.5% at 0.6 g/L. MC. The total germination rate of resting cyst decreased as the MC concentration increased, and approximately 68.0% of the resting cysts in the control group germinated successfully, whereas the addition of MC reduced the germination rate to as low as 12.4%. Our results indicated that the application of appropriate MC concentrations may provide an effective mitigation strategy for A. pacificum blooms because it does not leave more residual cysts, which can act as "seeds" for the initiation of HABs. (C) 2017 Elsevier B.V. All rights reserved.
关键词	Modified clay Alexandrium pacificum Cyst Encystment Germination
DOI	10.1016/j.hal.2017.12.001
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2017YFC1404300] ; Programs of the Qingdao National Laboratory for Marine Science and Technology[2016ASKJ02-3] ; National Natural Science Foundation of China[41276115] ; National Key R&D Program of China[2017YFC1404300] ; Programs of the Qingdao National Laboratory for Marine Science and Technology[2016ASKJ02-3] ; National Natural Science Foundation of China[41276115]
WOS研究方向	Marine & Freshwater Biology
WOS类目	Marine & Freshwater Biology
WOS记录号	WOS:000427809800004
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/157604
专题	海洋生态与环境科学重点实验室
通讯作者	Song, Xiuxian
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	海洋生态与环境科学重点实验室
通讯作者单位	海洋生态与环境科学重点实验室
推荐引用方式 GB/T 7714	Zhang, Yue,Yu, Zhiming,Song, Xiuxian,et al. Effects of modified clay used for the control of harmful algal blooms on Alexandrium pacificum cysts[J]. HARMFUL ALGAE,2018,72:36-45.
APA	Zhang, Yue,Yu, Zhiming,Song, Xiuxian,Yuan, Yongquan,&Cao, Xihua.(2018).Effects of modified clay used for the control of harmful algal blooms on Alexandrium pacificum cysts.HARMFUL ALGAE,72,36-45.
MLA	Zhang, Yue,et al."Effects of modified clay used for the control of harmful algal blooms on Alexandrium pacificum cysts".HARMFUL ALGAE 72(2018):36-45.

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