Cyst formation, development of Alexandrium tamarense from Yangtse River Estuary and its relation to bloom dynamics

	Cyst formation, development of Alexandrium tamarense from Yangtse River Estuary and its relation to bloom dynamics
	Gu, HF ; Lan, DZ ; Fang, Q ; Wang, ZL
刊名	ACTA BOTANICA SINICA
	2004-09
卷号	46 期号:9 页码:1025-1031
关键词	cyst Alexandrium tamarense Yangtse River estuary bloom
ISSN号	0577-7496
英文摘要	The toxic dinoflagellate - Alexandrium tamarense (Lebour) Balech, formed resting cysts in f/2 media with low nitrate concentrations. Among the concentrations tested, f/20 NO3- was the most effective to induction with an encystment percentage of 2.0 in batch culture. About 73.2% and 17.6% of cysts were produced on 8 and 9 d after transferring. Newly formed cysts developed accumulation body 3 d later and kept forming mucilaginous substance, which might help their dispersal and survival. The mandatory dormancy period of resting cysts was 15 and 10 d when stored at 15 and 20 degreesC respectively. The cysts could germinate without temperature change, with germination of 75.6% 20 d after formation at 20 degreesC. The Alexandrium cyst density in the surface sediment of DG-26 station reached above 25 cysts/g in May and November of 2002, and dropped to 4.5 and 0.9 cysts/g in August of 2002 and February of 2003, suggesting that Alexandrium cysts might have germinated in spring and autumn 2002. Cysts produced during the bloom returned to water column soon, whatever the season and water temperature were. The cyst density in the surface sediment at DG-26 station in May, 2003 was only 3.3 cysts/g and the cysts were newly formed. In the Yangtse River estuary, the inoculum size was not a major factor to determine the outbreak of A. tamarense bloom.
WOS关键词	GONYAULAX-TAMARENSIS ; POPULATION-DYNAMICS ; BENTHIC CYSTS ; DINOFLAGELLATE ; DINOPHYCEAE ; SCRIPPSIELLA ; GERMINATION ; REPRODUCTION ; ENCYSTMENT ; SEDIMENTS
WOS研究方向	Biochemistry & Molecular Biology ; Plant Sciences
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000224034800003
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26325]
专题	自然资源部第一海洋研究所
通讯作者	Gu, HF
作者单位	1.State Ocean Adm, Inst Oceanog 3, Xiamen 631005, Peoples R China 2.Ocean Univ Qingdao, Qingdao 266003, Peoples R China 3.State Ocean Adm, Inst Oceanog 1, Qingdao 266011, Peoples R China
推荐引用方式 GB/T 7714	Gu, HF,Lan, DZ,Fang, Q,et al. Cyst formation, development of Alexandrium tamarense from Yangtse River Estuary and its relation to bloom dynamics[J]. ACTA BOTANICA SINICA,2004,46(9):1025-1031.
APA	Gu, HF,Lan, DZ,Fang, Q,&Wang, ZL.(2004).Cyst formation, development of Alexandrium tamarense from Yangtse River Estuary and its relation to bloom dynamics.ACTA BOTANICA SINICA,46(9),1025-1031.
MLA	Gu, HF,et al."Cyst formation, development of Alexandrium tamarense from Yangtse River Estuary and its relation to bloom dynamics".ACTA BOTANICA SINICA 46.9(2004):1025-1031.