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Characterizing vertical migration of Microcystis aeruginosa and conditions for algal bloom development based on a light-driven migration model
Yao B(姚波); Liu QQ(刘青泉); Gao, Yong; Cao, Zhixian; Liu, QQ (reprint author), Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Beijing 100081, Peoples R China.
Source PublicationECOLOGICAL RESEARCH
2017-11-01
Volume32Issue:6Pages:961-969
ISSN0912-3814
AbstractLight-driven vertical migration is critical in dense aggregation of Microcystis aeruginosa during algal blooms under reduced turbulence conditions in natural water bodies. This study examined the vertical migration characteristics of Microcystis aeruginosa in calm water based on a colony migration model with consideration of cell density change, and demonstrated the effects of mucilage fraction, colony size, irradiance intensity, and water turbidity. The results suggest that colonies with larger radii and under higher irradiance usually had a larger daily averaged retention time at the water surface (DRT). In addition to colony size, mucilage was found to be important in changing the vertical migration behavior of Microcystis colonies, in which increasing mucilage volume fraction can increase the migrating velocity of the colony as well as the length of time it remains at the water surface. Increase of light extinction also favors the aggregation of colonies at the surface. An approximate critical value of 2400 mu mol photons m(2) s(-1) for maximum irradiance was found for persistent algal bloom development under the given simulation conditions. Extremely small colonies exposed to irradiance below the critical value were not likely to migrate to the water surface to form algal blooms. According to the DRT values, three regions with different ranges of irradiance and colony size were proposed as the critical conditions for algal bloom development. Rough comparisons to field observations suggested that these results were reasonable and meaningful, and have the potential to be applied in real cases following further validation by more detailed investigations.
KeywordVertical Migration Daily-averaged Retention Time Colony Radius Irradiance Mucilage
DOI10.1007/s11284-017-1505-9
Indexed BySCI
Language英语
WOS IDWOS:000415248500021
WOS KeywordCYANOBACTERIUM MICROCYSTIS ; EUTROPHIC LAKE ; SHALLOW LAKE ; SUMMER BLOOM ; PHYTOPLANKTON ; SIMULATION ; COLONIES ; ZOOPLANKTON ; VARIABILITY ; RESERVOIR
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEcology
Funding OrganizationSpecial Foundation (Class D) of the "Hundred Talents Program'' of the Chinese Academy of Sciences (CAS) ; National Natural Science Foundation of China(11202217)
ClassificationQ3
Ranking1
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/71942
Collection流固耦合系统力学重点实验室
Corresponding AuthorLiu, QQ (reprint author), Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Beijing 100081, Peoples R China.
Recommended Citation
GB/T 7714
Yao B,Liu QQ,Gao, Yong,et al. Characterizing vertical migration of Microcystis aeruginosa and conditions for algal bloom development based on a light-driven migration model[J]. ECOLOGICAL RESEARCH,2017,32(6):961-969.
APA 姚波,刘青泉,Gao, Yong,Cao, Zhixian,&Liu, QQ .(2017).Characterizing vertical migration of Microcystis aeruginosa and conditions for algal bloom development based on a light-driven migration model.ECOLOGICAL RESEARCH,32(6),961-969.
MLA 姚波,et al."Characterizing vertical migration of Microcystis aeruginosa and conditions for algal bloom development based on a light-driven migration model".ECOLOGICAL RESEARCH 32.6(2017):961-969.
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