IOCAS-IR  > 海洋生态与环境科学重点实验室
Effects of modified clay flocculation on major nutrients and diatom aggregation during Skeletonema costatum blooms in the laboratory
Lu Guangyuan1,2; Song Xiuxian1; Yu Zhiming1; Cao Xihua1; Yuan Yongquan1
2015-07-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN0254-4059
Volume33Issue:4Pages:1007-1019
Corresponding AuthorSong Xiuxian(songxx@qdio.ac.cn)
AbstractHarmful 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.
Keywordmodified clay HABs mitigation nutrients Skeletonema costatum ecological effect
DOI10.1007/s00343-015-4162-2
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41276115] ; National Basic Research Program of China (973 Program)[2010CB428706] ; Fund for Creative Research Groups by NSFC[41121064]
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000357037100022
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/157208
Collection海洋生态与环境科学重点实验室
Corresponding AuthorSong Xiuxian
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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.
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