气候变化领域集成服务门户(CCPortal): Salinity decline promotes growth and harmful blooms of a toxic alga by diverting carbon flow

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DOI	10.1111/gcb.17348
	Salinity decline promotes growth and harmful blooms of a toxic alga by diverting carbon flow
	Shi, Xinguo; Zou, Yazhen; Zhang, Yingjiao; Ding, Guangmao; Xiao, Yuchun; Lin, Senjie; Chen, Jianfeng
发表日期	2024
ISSN	1354-1013
EISSN	1365-2486
起始页码	30
结束页码	6
卷号	30 期号:6
英文摘要	Global climate change intensifies the water cycle and makes freshest waters become fresher and vice-versa. But how this change impacts phytoplankton in coastal, particularly harmful algal blooms (HABs), remains poorly understood. Here, we monitored a coastal bay for a decade and found a significant correlation between salinity decline and the increase of Karenia mikimotoi blooms. To examine the physiological linkage between salinity decreases and K. mikimotoi blooms, we compare chemical, physiological and multi-omic profiles of this species in laboratory cultures under high (33) and low (25) salinities. Under low salinity, photosynthetic efficiency and capacity as well as growth rate and cellular protein content were significantly higher than that under high salinity. More strikingly, the omics data show that low salinity activated the glyoxylate shunt to bypass the decarboxylation reaction in the tricarboxylic acid cycle, hence redirecting carbon from CO2 release to biosynthesis. Furthermore, the enhanced glyoxylate cycle could promote hydrogen peroxide metabolism, consistent with the detected decrease in reactive oxygen species. These findings suggest that salinity declines can reprogram metabolism to enhance cell proliferation, thus promoting bloom formation in HAB species like K. mikimotoi, which has important ecological implications for future climate-driven salinity declines in the coastal ocean with respect to HAB outbreaks.
英文关键词	global climate change; harmful algal bloom; Karenia mikimotoi; ROS; salinity
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:001236534300001
来源期刊	GLOBAL CHANGE BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/309256
作者单位	Fuzhou University; Minjiang University; University of Connecticut; Fujian Polytechnic Normal University
推荐引用方式 GB/T 7714	Shi, Xinguo,Zou, Yazhen,Zhang, Yingjiao,et al. Salinity decline promotes growth and harmful blooms of a toxic alga by diverting carbon flow[J],2024,30(6).
APA	Shi, Xinguo.,Zou, Yazhen.,Zhang, Yingjiao.,Ding, Guangmao.,Xiao, Yuchun.,...&Chen, Jianfeng.(2024).Salinity decline promotes growth and harmful blooms of a toxic alga by diverting carbon flow.GLOBAL CHANGE BIOLOGY,30(6).
MLA	Shi, Xinguo,et al."Salinity decline promotes growth and harmful blooms of a toxic alga by diverting carbon flow".GLOBAL CHANGE BIOLOGY 30.6(2024).