气候变化领域集成服务门户(CCPortal): Evidence for massive and recurrent toxic blooms of Alexandrium catenella in the Alaskan Arctic

CCPortal

DOI	10.1073/pnas.2107387118
	Evidence for massive and recurrent toxic blooms of Alexandrium catenella in the Alaskan Arctic
	Anderson D.M.; Fachon E.; Pickart R.S.; Lin P.; Fischer A.D.; Richlen M.L.; Uva V.; Brosnahan M.L.; McRaven L.; Bahr F.; Lefebvre K.; Grebmeier J.M.; Danielson S.L.; Lyu Y.; Fukai Y.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:41
英文摘要	Among the organisms that spread into and flourish in Arctic waters with rising temperatures and sea ice loss are toxic algae, a group of harmful algal bloom species that produce potent biotoxins. Alexandrium catenella, a cyst-forming dinoflagellate that causes paralytic shellfish poisoning worldwide, has been a significant threat to human health in southeastern Alaska for centuries. It is known to be transported into Arctic regions in waters transiting northward through the Bering Strait, yet there is little recognition of this organism as a human health concern north of the Strait. Here, we describe an exceptionally large A. catenella benthic cyst bed and hydrographic conditions across the Chukchi Sea that support germination and development of recurrent, locally originating and self-seeding blooms. Two prominent cyst accumulation zones result from deposition promoted by weak circulation. Cyst concentrations are among the highest reported globally for this species, and the cyst bed is at least 6× larger in area than any other. These extraordinary accumulations are attributed to repeated inputs from advected southern blooms and to localized cyst formation and deposition. Over the past two decades, warming has likely increased the magnitude of the germination flux twofold and advanced the timing of cell inoculation into the euphotic zone by 20 d. Conditions are also now favorable for bloom development in surface waters. The region is poised to support annually recurrent A. catenella blooms that are massive in scale, posing a significant and worrisome threat to public and ecosystem health in Alaskan Arctic communities where economies are subsistence based. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Alaskan Arctic; Alexandrium; Climate; HAB; Harmful algal bloom
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238621
作者单位	Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Physical Oceanography Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Environmental and Fisheries Sciences Division, Northwest Fisheries Science Center, NOAA to National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Seattle, WA 98112, United States; Chesapeake Biological Laboratory, University of Maryland Center for Environmental Sciences, Solomons, MD 20688, United States; College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK 99775, United States; South ChinaSea Environmental Monitoring Center, State Oceanic Administration, Guangzhou, 510300, China; Graduate School of Environmental Science, Hokkaido University, Hokkaido, Sapporo, 060-0810, Japan
推荐引用方式 GB/T 7714	Anderson D.M.,Fachon E.,Pickart R.S.,et al. Evidence for massive and recurrent toxic blooms of Alexandrium catenella in the Alaskan Arctic[J],2021,118(41).
APA	Anderson D.M..,Fachon E..,Pickart R.S..,Lin P..,Fischer A.D..,...&Fukai Y..(2021).Evidence for massive and recurrent toxic blooms of Alexandrium catenella in the Alaskan Arctic.Proceedings of the National Academy of Sciences of the United States of America,118(41).
MLA	Anderson D.M.,et al."Evidence for massive and recurrent toxic blooms of Alexandrium catenella in the Alaskan Arctic".Proceedings of the National Academy of Sciences of the United States of America 118.41(2021).