Seasonal dynamics of phytoplankton phosphorus stress in temperate Jiaozhou Bay, North China

doi:10.1016/j.csr.2021.104602

	Seasonal dynamics of phytoplankton phosphorus stress in temperate Jiaozhou Bay, North China
	Zhang, Xia 1,2; Zhang, Jingping 1; Yuan, Huamao 3; Shen, Yuan 1; Zhou, Changhao 1; Huang, Xiaoping 1,2
	2021-12-01
发表期刊	CONTINENTAL SHELF RESEARCH
ISSN	0278-4343
卷号	231 页码:9
通讯作者	Huang, Xiaoping([email protected])
摘要	Alkaline 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.
关键词	Alkaline phosphatase activity Enzyme kinetics Phytoplankton and bacteria Phosphate stress DOP
DOI	10.1016/j.csr.2021.104602
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000725217900004
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：4[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/337002/177315
专题	海洋生态与环境科学重点实验室
通讯作者	Huang, Xiaoping
作者单位	1.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
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	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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