Morphology and bloom dynamics of Cochlodinium geminatum (Schutt) Schutt in the Pearl River Estuary, South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院海洋生物资源可持续利用重点实验室

	Morphology and bloom dynamics of Cochlodinium geminatum (Schutt) Schutt in the Pearl River Estuary, South China Sea
	ppshen@graduate.hku.hk; Huang, LM; Qi, YZ; Li, YN; Shen, PP; Tan, YH; Zhang, LP; tql@jnu.edu.cn
刊名	HARMFUL ALGAE
	2012
卷号	13 页码:41566
关键词	Bloom Dynamics Cochlodinium Geminatum Environmental Factors Multivariate Analysis Pearl River Estuary
ISSN号	1568-9883
英文摘要	An unarmored dinoflagellate bloom of Cochlodinium geminatum (Schutt) Schutt has been identified in the Pearl River Estuary, South China Sea during the severe dry season, from late October to early November, 2009, when temperature and salinity ranged between 20.0-27.2 degrees C and 10.6-33.4, respectively. Light and scanning electron microscopy were used to identify the characteristics of C. geminatum and provided the clear morphological structure for this species. The organism was primarily found in chains of two cells or single cell, and no longer chains were observed. Cells were irregularly spherical or slightly dorsoventrally, with size ranged between 28 and 36 pm and longer than wide. A large nucleus in the center with numerous golden chloroplasts was present, and the cingulum made 1.5 turns around the cell. The concentration of C. geminatum ranged from 102 to greater than 10(7) cells l(-1) during the bloom period. Nutrient concentration ranges during the bloom were 1.29-81.00 mu M NO3, 0.14-12.14 mu M NO2, 0.21-6.29 mu M NH4, 0.23-6.26 mu M PO4 and 3.29-171.43 mu M SiO3, respectively. Total biomass expressed in terms of chlorophyll a ranged from 2.44 to 135.45 mu g l(-1), with an average 19.9 mu g l(-1) in surface water throughout the PRE. Two main clusters corresponding to the water sectors were defined with multivariate analysis (cluster and nMDS). Based on the composition and abundance of phytoplankton, spatial variations were observed at a significant level (ANOSIM, R = 0.44, P < 0.01). Although the pairwise correlation analysis detected no significant effect of any single environmental variable on the abundance of C. geminatum, the multivariate analysis (BIO-ENV) between biotic and abiotic variables resulted in the best variables combination with all measured factors involved (temperature, salinity, turbidity, NO3, NO2, NH4, PO4 and SiO3) which showed a combined effect during the bloom of C. geminatum in the Pearl River Estuary (rho(w) = 0.477). (C) 2011 Elsevier B.V. All rights reserved.
学科主题	Marine & Freshwater Biology
资助项目	LMB
语种	英语
WOS记录号	WOS:000300132600002
公开日期	2013-08-28
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10010]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
通讯作者	ppshen@graduate.hku.hk; tql@jnu.edu.cn
推荐引用方式 GB/T 7714	ppshen@graduate.hku.hk,Huang, LM,Qi, YZ,et al. Morphology and bloom dynamics of Cochlodinium geminatum (Schutt) Schutt in the Pearl River Estuary, South China Sea[J]. HARMFUL ALGAE,2012,13:41566.
APA	ppshen@graduate.hku.hk.,Huang, LM.,Qi, YZ.,Li, YN.,Shen, PP.,...&tql@jnu.edu.cn.(2012).Morphology and bloom dynamics of Cochlodinium geminatum (Schutt) Schutt in the Pearl River Estuary, South China Sea.HARMFUL ALGAE,13,41566.
MLA	ppshen@graduate.hku.hk,et al."Morphology and bloom dynamics of Cochlodinium geminatum (Schutt) Schutt in the Pearl River Estuary, South China Sea".HARMFUL ALGAE 13(2012):41566.