Fast acclimation of phytoplankton assemblies to acute salinity stress in the Jiulong River Estuary

doi:10.1007/s13131-019-1389-3

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院海洋生物资源可持续利用重点实验室

	Fast acclimation of phytoplankton assemblies to acute salinity stress in the Jiulong River Estuary
	Li, Gang 1
刊名	ACTA OCEANOLOGICA SINICA
	2019
卷号	38 期号:8 页码:78
关键词	PSII quantum yield carbon fixation salinity gradients phytoplankton assemblies Jiulong River Estuary
ISSN号	0253-505X
DOI	10.1007/s13131-019-1389-3
英文摘要	Mixing of freshwater and seawater creates the well-known salinity gradients along the estuaries. In order to investigate how phytoplankton respond to the acute salinity changes, we exposed natural phytoplankton assemblies from the Jiulong River Estuary to differential saline field water while continuously monitoring their photosynthetic performances under both indoor- and outdoor-growth conditions. When the natural cell assemblies from salinity 30 field water were exposed to series low saline field water (salinity 25, 17, 13 and 7.5), the effective Photosystem II quantum yield (Delta F/F-m(')) decreased sharply, e.g., to one-fifth of its initials after 5 min exposure to salinity 7.5 field water, and then increased fast during the following 40 min and almost completely recovered after 320 min. During such an exposure process, non-photochemical quenching (NPQ) sharply increased from 0 to 0.85 within 5 min, and then decreased to nearly 0 within the following 70 min. When these cells re-acclimated to salinity 7.5 field water were exposed to series high saline field water (salinity 13, 17, 25 and 30), a similar response pattern was observed, with the decreased Delta F/F-m(') accompanied with increased NPQ, and followed by the recovery-induced increase in Delta F/F-m(') and decrease in NPQ. A similar response pattern as Delta F/F-m(') to the acute osmotic stress was also observed in the photosynthetic carbon fixation capacity according to radiocarbon (C-14) incorporation. Our results indicate that estuarine phytoplankton assemblies could rapidly recover from the acute osmotic stress, implying a potential cause for their frequent blooms in coastal-estuarine waters where despite drastically varying salinity, available nutrients are abundant due to the land-derived runoffs or mixing-caused relaxations from sediments.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/17801]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510301, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Li, Gang. Fast acclimation of phytoplankton assemblies to acute salinity stress in the Jiulong River Estuary[J]. ACTA OCEANOLOGICA SINICA,2019,38(8):78, 85.
APA	Li, Gang.(2019).Fast acclimation of phytoplankton assemblies to acute salinity stress in the Jiulong River Estuary.ACTA OCEANOLOGICA SINICA,38(8),78.
MLA	Li, Gang."Fast acclimation of phytoplankton assemblies to acute salinity stress in the Jiulong River Estuary".ACTA OCEANOLOGICA SINICA 38.8(2019):78.