气候变化领域集成服务门户(CCPortal): Cloud shadows drive vertical migrations of deep-dwelling marine life

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DOI	10.1073/pnas.2022977118
	Cloud shadows drive vertical migrations of deep-dwelling marine life
	Omand M.M.; Steinberg D.K.; Stamieszkin K.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:32
英文摘要	Many zooplankton and fishes vertically migrate on a diel cycle to avoid predation, moving from their daytime residence in darker, deep waters to prey-rich surface waters to feed at dusk and returning to depth before dawn. Verticalmigrations also occur in response to other processes that modify local light intensity, such as storms, eclipses, and full moons. We observed rapid, high-frequency migrations, spanning up to 60 m, of a diel vertically migrating acoustic scattering layer with a daytime depth of 300 m in the subpolar Northeastern Pacific Ocean. The depth of the layer was significantly correlated, with an ∼5-min lag, to cloud-driven variability in surface photosynthetically available radiation. A model of isolumefollowing swimming behavior reproduces the observed layer depth and suggests that the high-frequency migration is a phototactic response to absolute light level. Overall, the cumulative distance traveled per day in response to clouds was at least 36% of the roundtrip diel migration distance. This previously undescribed phenomenon has implications for the metabolic requirements of migrating animals while at depth and highlights the powerful evolutionary adaptation for visual predator avoidance. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Clouds; Phototaxis; Vertical migration; Zooplankton
语种	英语
scopus关键词	article; diel vertical migration; evolutionary adaptation; nonhuman; Pacific Ocean; photosynthesis; phototaxis; predator avoidance; swimming; zooplankton
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/238445
作者单位	Graduate School of Oceanography, University of Rhode Island, Narragansett, RI 02882, United States; Biological Sciences Department, Virginia Institute of Marine Science, Gloucester Point, VA 23062, United States
推荐引用方式 GB/T 7714	Omand M.M.,Steinberg D.K.,Stamieszkin K.. Cloud shadows drive vertical migrations of deep-dwelling marine life[J],2021,118(32).
APA	Omand M.M.,Steinberg D.K.,&Stamieszkin K..(2021).Cloud shadows drive vertical migrations of deep-dwelling marine life.Proceedings of the National Academy of Sciences of the United States of America,118(32).
MLA	Omand M.M.,et al."Cloud shadows drive vertical migrations of deep-dwelling marine life".Proceedings of the National Academy of Sciences of the United States of America 118.32(2021).