气候变化领域集成服务门户(CCPortal): The impact of extreme weather events exceeds those due to global-change drivers on coastal phytoplankton assemblages

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DOI	10.1016/j.scitotenv.2024.170644
	The impact of extreme weather events exceeds those due to global-change drivers on coastal phytoplankton assemblages
	Helbling, E. Walter; Villafane, Virginia E.; Narvarte, Maite A.; Burgueno, Giuliana M.; Saad, Juan F.; Gonzalez, Raill A.; Cabrerizo, Marco J.
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	918
卷号	918
英文摘要	Extreme wind and rainfall events have become more frequent phenomena, impacting coastal ecosystems by inducing increased mixing regimes in the upper mixed layers (UML) and reduced transparency (i.e. browning), hence affecting phytoplankton photosynthesis. In this study, five plankton assemblages from the South Atlantic Ocean, from a gradient of environmental variability and anthropogenic exposure, were subjected to simulated extreme weather events under a global change scenario (GCS) of increased temperature and nutrients and decreased pH, and compared to ambient conditions (Control). Using multiple linear regression (MLR) analysis we determined that evenness and the ratio of diatoms/ (flagellates + dinoflagellates) significantly explained the variations (81-91 %) of the photosynthesis efficiency (i.e. P-chla/ETRchla ratio) for each site under static conditions. Mixing speed and the optical depth (i.e. attenuation coefficient * depth, k(d)z), as single drivers, explained 40-76 % of the variability in the P-chla/ETRchla ratio, while GCS drivers <9 %. Overall, assemblages with high diversity and evenness were less vulnerable to extreme weather events under a GCS. Extreme weather events should be considered in global change studies and conservation/management plans as even at local/regional scales, they can exceed the predicted impacts of mean global climate change on coastal primary productivity.
英文关键词	Acidification; Nutrients inputs; Photosynthetic efficiency; Terrestrial runoff; Vertical mixing; Warming
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001181733100001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296945
作者单位	Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Universidad Nacional del Comahue; Universidad Nacional del Comahue; University of Granada
推荐引用方式 GB/T 7714	Helbling, E. Walter,Villafane, Virginia E.,Narvarte, Maite A.,et al. The impact of extreme weather events exceeds those due to global-change drivers on coastal phytoplankton assemblages[J],2024,918.
APA	Helbling, E. Walter.,Villafane, Virginia E..,Narvarte, Maite A..,Burgueno, Giuliana M..,Saad, Juan F..,...&Cabrerizo, Marco J..(2024).The impact of extreme weather events exceeds those due to global-change drivers on coastal phytoplankton assemblages.SCIENCE OF THE TOTAL ENVIRONMENT,918.
MLA	Helbling, E. Walter,et al."The impact of extreme weather events exceeds those due to global-change drivers on coastal phytoplankton assemblages".SCIENCE OF THE TOTAL ENVIRONMENT 918(2024).