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Seasonal dynamics of phytoplankton phosphorus stress in temperate Jiaozhou Bay, North China
Zhang, Xia1,2; Zhang, Jingping1; Yuan, Huamao3; Shen, Yuan1; Zhou, Changhao1; Huang, Xiaoping1,2
2021-12-01
Source PublicationCONTINENTAL SHELF RESEARCH
ISSN0278-4343
Volume231Pages:9
Corresponding AuthorHuang, Xiaoping(xphuang@scsio.ac.cn)
AbstractAlkaline phosphatase activity (APA) is always used to evaluate the phosphorus (P) status of phytoplankton community and considered as a proxy for phosphate (DIP) stress or deficiency. In this study, we presented seasonal distributions of APA [including free APA (F-APA) and particulate APA (P-APA)] and enzyme kinetics and compared to the distribution of phosphorus concentrations, planktonic biomass and other environmental variables reflecting community P status in moderate DIP-deficient Jiaozhou Bay, North China. Low potential APA (V-max) were detected in winter (mean 51.3 nM h(-1)), which was probably due to low water temperature, while higher APA corresponded well to high phosphate requirement and high biological productivity in other three seasons. Normalized total APA (specified by chlorophyll a and bacteria biomass) showed an inverse hyperbolic relationship with DIP and the threshold phosphate concentration for the transition from high to low APA was around 0.2 mu M in Jiaozhou Bay. Combined with results of APA, P concentrations (including DIP and DOP) and half saturation constant (K-m), our findings suggested that phytoplankton and bacteria in Jiaozhou Bay may be experiencing a relief from P-limitation in winter; while in other three seasons, these organisms were mainly under persistent P stress. Moreover, in order to compensate for phosphate deficiency, we hypothesize that plankton not only by means of promoting enzyme production as indicated by increase of V-max, but also by an improved enzyme affinity as represented by a decrease of the Michaelis constant (K-m). Consequently, higher APA and lower DOP stocks in summer were probably a result of greater utilization of the DOP pool to maintain high primary production.
KeywordAlkaline phosphatase activity Enzyme kinetics Phytoplankton and bacteria Phosphate stress DOP
DOI10.1016/j.csr.2021.104602
Indexed BySCI
Language英语
Funding ProjectNational Basic Research Program (973 Program) of China[2015CB452905] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0405] ; National Natural Science Foundation of China[41730529]
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000725217900004
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/177315
Collection海洋生态与环境科学重点实验室
Corresponding AuthorHuang, Xiaoping
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab, Guangzhou 511458, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, 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
Zhang, Xia,Zhang, Jingping,Yuan, Huamao,et al. Seasonal dynamics of phytoplankton phosphorus stress in temperate Jiaozhou Bay, North China[J]. CONTINENTAL SHELF RESEARCH,2021,231:9.
APA Zhang, Xia,Zhang, Jingping,Yuan, Huamao,Shen, Yuan,Zhou, Changhao,&Huang, Xiaoping.(2021).Seasonal dynamics of phytoplankton phosphorus stress in temperate Jiaozhou Bay, North China.CONTINENTAL SHELF RESEARCH,231,9.
MLA Zhang, Xia,et al."Seasonal dynamics of phytoplankton phosphorus stress in temperate Jiaozhou Bay, North China".CONTINENTAL SHELF RESEARCH 231(2021):9.
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