Photosynthetic physiologies of phytoplankton in the eastern equatorial Indian Ocean during the spring inter-monsoon

doi:10.1007/s13131-018-1218-0

	Photosynthetic physiologies of phytoplankton in the eastern equatorial Indian Ocean during the spring inter-monsoon
	Yuan, Chao 1,2; Xu, Zongjun 2; Zhang, Xuelei 2; Wei, Qinsheng 2; Wang, Huiwu 3; Wang, Zongling 1,2
刊名	ACTA OCEANOLOGICA SINICA
	2019-06
卷号	38 期号:6 页码:83-91
关键词	F-v F-m rapid light curves photosynthetic physiologies eastern equatorial Indian Ocean
ISSN号	0253-505X
DOI	10.1007/s13131-018-1218-0
英文摘要	Phytoplankton physiologies are dynamic and have sensitive responses to the ambient environment. In this paper, we examine photosynthetic physiologies of phytoplankton communities with Phyto-PAM in the eastern equatorial Indian Ocean during the spring inter-monsoon. Environmental parameters were measured to investigate the coupling between phytoplankton photosynthetic physiologies and their habitats. During the cruise, the water column was highly stratified. The mixed layer extended to about 75 m and was characterized by high temperature (>28 degrees C) and low nutrient level. The F-v/F-m values and chlorophyll a (Chl a) concentrations were lower at the surface, as consequences of nutrient depletion and photo-inhibition. Subsurface Chl a maximum (SCM) occurred between 75 and 100 m, and had the highest F-v/F-m values. The formation of SCM was a balance between nutrient availability and light limitation. The SCM may contribute significantly to pelagic food web and primary production in the water column. Phytoplankton in different layers encountered different light, trophic and hydrographic dynamics and evolved distinct photosynthetic characteristics. Despite of co-limitation of nutrient limitation and photo-inhibition, phytoplankton in the surface layer showed their acclimation to high irradiance, had lower light utilization efficiencies (: 0.061 +/- 0.032) and could exploit a wide range of light irradiance. Whereas, phytoplankton in the SCM layers presented the highest light utilization efficiencies (: 0.146 +/- 0.48), which guaranteed higher photosynthetic capacities under low light level. These results provide insights into phytoplankton photo-adaption strategies in this less explored region.
资助项目	FIO Basic Research Fund[2013T04]
WOS关键词	RAPID LIGHT CURVES ; PAM FLUOROMETRY ; FLUORESCENCE ; PARAMETERS ; RESPONSES ; TOOL ; PHOTOACCLIMATION ; PRODUCTIVITY ; COMMUNITIES ; INDICATORS
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000470817800009
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24641]
专题	自然资源部第一海洋研究所
通讯作者	Zhang, Xuelei
作者单位	1.Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266061, Shandong, Peoples R China 2.Minist Nat Resources, Inst Oceanog 1, MNR Key Lab Sci & Engn Marine Ecosyst, Marine Ecol Res Ctr, Qingdao 266061, Shandong, Peoples R China 3.Minist Nat Resources, Inst Oceanog 1, MNR Key Lab Marine Sci & Numer Modeling, Qingdao 266061, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Chao,Xu, Zongjun,Zhang, Xuelei,et al. Photosynthetic physiologies of phytoplankton in the eastern equatorial Indian Ocean during the spring inter-monsoon[J]. ACTA OCEANOLOGICA SINICA,2019,38(6):83-91.
APA	Yuan, Chao,Xu, Zongjun,Zhang, Xuelei,Wei, Qinsheng,Wang, Huiwu,&Wang, Zongling.(2019).Photosynthetic physiologies of phytoplankton in the eastern equatorial Indian Ocean during the spring inter-monsoon.ACTA OCEANOLOGICA SINICA,38(6),83-91.
MLA	Yuan, Chao,et al."Photosynthetic physiologies of phytoplankton in the eastern equatorial Indian Ocean during the spring inter-monsoon".ACTA OCEANOLOGICA SINICA 38.6(2019):83-91.