Effects of elevated pCO(2) on the response of coccolithophore Emiliania huxleyi to prolonged darkness

doi:10.1080/17451000.2023.2169463

	Effects of elevated pCO(2) on the response of coccolithophore Emiliania huxleyi to prolonged darkness
	Gao, Letian 3; Huang, Zhongjian 2; Zhong, Zhihai 1; Shi, Xiaomeng 3; Chang, Xing 3; Sun, Yuhong 3; Zhang, Nuoyan 3; Zou, Ning 3; Tong, Shanying 3
刊名	MARINE BIOLOGY RESEARCH
	2023-02-09
页码	11
关键词	Coccolithophore ocean acidification carbon cycling
ISSN号	1745-1000
DOI	10.1080/17451000.2023.2169463
通讯作者	Tong, Shanying(tongshanying@163.com)
英文摘要	Although numerous studies have examined the responses of coccolithophores to ocean acidification, less is known on the fate of those calcifying organisms when they sink to the ocean's aphotic regions. In this study, the coccolithophore Emiliania huxleyi was first grown under a regular 12/12 light/dark cycle at 20 degrees C, exposed to both high (1000 mu atm) and ambient CO2 (410 mu atm) levels. The cultures were then transferred to continuous darkness for 96 h at 20 degrees C or 16 degrees C. We found that elevated CO2 decreased the specific growth rate while increasing the cellular particulate organic carbon (POC) and nitrogen (PON) contents and the POC/PON ratio of E. huxleyi in the light/dark period. After 96 h of dark acclimation, the cell abundance decreased more obviously at 20 degrees C than at 16 degrees C but showed no significant difference between the two CO2 treatments. The decrease in volumetric POC concentration was most prominent in the high CO2/20 degrees C treatment and least in the ambient CO2/16 degrees C treatment. At 16 degrees C, the PON concentration increased in the high CO2 cultures and exhibited no change in the ambient CO2 cultures. While at 20 degrees C, the PON concentration decreased significantly both under high and ambient CO2 conditions. The final POC/PON ratio showed no significant differences among the different temperature and CO2 treatments. Overall, a higher percentage of POC relative to that of PON was lost in darkness with increasing CO2 concentration, with potential implications for the ocean's nutrient cycle.
WOS关键词	PHYSIOLOGICAL-RESPONSES ; ORGANIC-CARBON ; SEAWATER ACIDIFICATION ; OCEAN ACIDIFICATION ; UV-RADIATION ; MARINE ; CALCIFICATION ; SURVIVAL ; DIATOM ; RATES
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
语种	英语
WOS记录号	WOS:000928995200001
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Shandong Province ; Talent Induction Program for Youth Innovation Teams in Colleges and Universities of Shandong Province
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/32648]
专题	中国科学院烟台海岸带研究所
通讯作者	Tong, Shanying
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai, Peoples R China 2.Guangxi Acad Oceanog, Nanning, Peoples R China 3.Ludong Univ, Sch Life Sci, Yantai, Peoples R China
推荐引用方式 GB/T 7714	Gao, Letian,Huang, Zhongjian,Zhong, Zhihai,et al. Effects of elevated pCO(2) on the response of coccolithophore Emiliania huxleyi to prolonged darkness[J]. MARINE BIOLOGY RESEARCH,2023:11.
APA	Gao, Letian.,Huang, Zhongjian.,Zhong, Zhihai.,Shi, Xiaomeng.,Chang, Xing.,...&Tong, Shanying.(2023).Effects of elevated pCO(2) on the response of coccolithophore Emiliania huxleyi to prolonged darkness.MARINE BIOLOGY RESEARCH,11.
MLA	Gao, Letian,et al."Effects of elevated pCO(2) on the response of coccolithophore Emiliania huxleyi to prolonged darkness".MARINE BIOLOGY RESEARCH (2023):11.