Effects of modified clay flocculation on major nutrients and diatom aggregation during Skeletonema costatum blooms in the laboratory

doi:10.1007/s00343-015-4162-2

	Effects of modified clay flocculation on major nutrients and diatom aggregation during Skeletonema costatum blooms in the laboratory
	Lu Guangyuan 1,2; Song Xiuxian1 ; Yu Zhiming1 ; Cao Xihua1 ; Yuan Yongquan1
	2015-07-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	33 期号:4 页码:1007-1019
通讯作者	Song Xiuxian(songxx@qdio.ac.cn)
摘要	Harmful algal blooms (HABs) can elicit several negative effects on aquatic environment (such as depleting the oxygen, blocking the sunlight, destroying the habitats of organisms) and life health (including poisoning/killing marine mammals, birds and human). Among the various control strategies for HABs (physical manipulation needs lots of manpower and expensive equipment, chemicals treatment has some toxic byproduct and high residual, microbial agents only has limited in laboratory research), the coagulation-flocculation of HAB species by modified clay (MC) has been proven to be an effective, low-cost and environmentally friendly method that has been widely applied in the field, particularly in eastern Asia. In order to examine the long-term effects of MC treatment, this study investigated the alternations in seawater of Skeletonema costatum, a high biomass dominant HAB species along the Chinese coast, by comparing the degradation of S. costatum detritus (A1) with the application of MC treatment (A2) and MC treatment in sediment condition (A3). The low dosage of 0.25 g/L MC could efficiently remove 4x10(8) cells/L of S. costatum cells within 3.5 h (approximately 97% removal). In addition, the results showed that both inorganic and organic nutrients were effectively reduced from seawater by MC particles. Compared to the total nitrogen (TN) and total phosphorus (TP) concentrations in A1 seawater, 44% of TN and 93% of TP in A2 seawater, as well as 72% of TN and 93% of TP in A3 seawater were removed during the one-month incubation period. Simultaneously, 64% of DISi in A2 and 44% of DISi in A3 significantly decreased (P < 0.001). This study demonstrated that MC treatment was able to significantly increase the downward flux of nutrients and delay the release velocity of inorganic nutrient from MC-algae matrix into the overlying seawater, particularly within sediment environment.
关键词	modified clay HABs mitigation nutrients Skeletonema costatum ecological effect
DOI	10.1007/s00343-015-4162-2
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41276115] ; National Basic Research Program of China (973 Program)[2010CB428706] ; Fund for Creative Research Groups by NSFC[41121064] ; National Natural Science Foundation of China[41276115] ; National Basic Research Program of China (973 Program)[2010CB428706] ; Fund for Creative Research Groups by NSFC[41121064]
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Limnology ; Oceanography
WOS记录号	WOS:000357037100022
出版者	SCIENCE PRESS
引用统计	被引频次：15[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/337002/157208
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 IOCAS, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Lu Guangyuan,Song Xiuxian,Yu Zhiming,et al. Effects of modified clay flocculation on major nutrients and diatom aggregation during Skeletonema costatum blooms in the laboratory[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2015,33(4):1007-1019.
APA	Lu Guangyuan,Song Xiuxian,Yu Zhiming,Cao Xihua,&Yuan Yongquan.(2015).Effects of modified clay flocculation on major nutrients and diatom aggregation during Skeletonema costatum blooms in the laboratory.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,33(4),1007-1019.
MLA	Lu Guangyuan,et al."Effects of modified clay flocculation on major nutrients and diatom aggregation during Skeletonema costatum blooms in the laboratory".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 33.4(2015):1007-1019.