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Regeneration and utilization of nutrients during collapse of a Mesodinium rubrum red tide and its influence on phytoplankton species composition
Zhang, Yafeng; Song, Xiuxian1; Harrison, Paul J.; Liu, Sheng3; Yu, Zhiming1; Kan, Jinjun4; Qian, Peiyuan5; Liu, Hao; Yin, Kedong
2018-10-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume61Issue:10Pages:1384-1396
SubtypeArticle
AbstractHigh-biomass red tides occur frequently in some semi-enclosed bays of Hong Kong where ambient nutrients are not high enough to support such a high phytoplankton biomass. These high-biomass red tides release massive inorganic nutrients into local waters during their collapse. We hypothesized that the massive inorganic nutrients released from the collapse of red tides would fuel growth of other phytoplankton species. This could influence phytoplankton species composition. We tested the hypothesis using a red tide event caused by Mesodinium rubrum (M. rubrum) in a semi-enclosed bay, Port Shelter. The red tide patch had a cell density as high as 5.0 x10(5) cells L-1, and high chlorophyll a (63.71 mu g L-1). Ambient inorganic nutrients (nitrate: NO3, ammonium: NH4, phosphate: PO43-, silicate: SiO43-) were low both in the red tide patch and the non-red-tide patch (clear waters outside the red tide patch). Nutrient addition experiments were conducted by adding all the inorganic nutrients to water samples from the two patches followed by incubation for 9 days. The results showed that the addition of inorganic nutrients did not sustain high M. rubrum cell density, which collapsed after day 1, and did not drive M. rubrum in the non-red-tide patch sample to the same high-cell density in the red tide patch sample. This confirmed that nutrients were not the driving factor for the formation of this red tide event, or for its collapse. The death of M. rubrum after day 1 released high concentrations of NO3-, PO43-, SiO43-, NH4+, and urea. Bacterial abundance and heterotrophic activity increased, reaching the highest on day 3 or 4, and decreased as cell density of M. rubrum declined. The released nutrients stimulated growth of diatoms, such as Chaetoceros affinis var. circinalis, Thalassiothrix frauenfeldii, and Nitzschia sp., particularly with additions of SiO43- treatments, and other species. These results demonstrated that initiation of M. rubrum red tides in the bay was not directly driven by nutrients. However, the massive inorganic nutrients released from the collapse of the red tide could induce a second bloom in low-ambient nutrient water, influencing phytoplankton species composition.
KeywordRed tides Species composition Nutrients Regeneration Mesodinium rubrum
Subject AreaGeology
DOI10.1007/s11430-017-9233-x
Indexed BySCIE
Language英语
WOS Research AreaGeosciences, Multidisciplinary
WOS IDWOS:000446517200004
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/157531
Collection海洋生态与环境科学重点实验室
Affiliation1.Sun Yat Sen Univ, Sch Marine Sci, Guangzhou 510006, Guangdong, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
3.Harrison, Paul J.] Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC V6T 1Z4, Canada
4.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Environm Dynam, Guangzhou 510301, Guangdong, Peoples R China
5.Stroud Water Res Ctr, Microbiol Div, 970 Spencer Rd, Avondale, PA 19311 USA
6.Hong Kong Univ Sci & Technol, Div Life Sci, Clear Water Bay, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yafeng,Song, Xiuxian,Harrison, Paul J.,et al. Regeneration and utilization of nutrients during collapse of a Mesodinium rubrum red tide and its influence on phytoplankton species composition[J]. SCIENCE CHINA-EARTH SCIENCES,2018,61(10):1384-1396.
APA Zhang, Yafeng.,Song, Xiuxian.,Harrison, Paul J..,Liu, Sheng.,Yu, Zhiming.,...&Yin, Kedong.(2018).Regeneration and utilization of nutrients during collapse of a Mesodinium rubrum red tide and its influence on phytoplankton species composition.SCIENCE CHINA-EARTH SCIENCES,61(10),1384-1396.
MLA Zhang, Yafeng,et al."Regeneration and utilization of nutrients during collapse of a Mesodinium rubrum red tide and its influence on phytoplankton species composition".SCIENCE CHINA-EARTH SCIENCES 61.10(2018):1384-1396.
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