气候变化领域集成服务门户(CCPortal): Foraging trade-offs, flagellar arrangements, and flow architecture of planktonic protists

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DOI	10.1073/pnas.2009930118
	Foraging trade-offs, flagellar arrangements, and flow architecture of planktonic protists
	Nielsen L.T.; Kiørboe T.
发表日期	2021
ISSN	00278424
卷号	118 期号:3
英文摘要	Unicellular flagellated protists are a key element in aquatic microbial food webs. They all use flagella to swim and to generate feeding currents to encounter prey and enhance nutrient uptake. At the same time, the beating flagella create flow disturbances that attract flow-sensing predators. Protists have highly diverse flagellar arrangements in terms of number of flagella and their position, beat pattern, and kinematics, but it is unclear how the various arrangements optimize the fundamental trade-off between resource acquisition and predation risk. Here we describe the near-cell flow fields produced by 15 species and demonstrate consistent relationships between flagellar arrangement and swimming speed and between flagellar arrangement and flow architecture, and a trade-off between resource acquisition and predation risk. The flow fields fall in categories that are qualitatively described by simple point force models that include the drag force of the moving cell body and the propulsive forces of the flagella. The trade-off between resource acquisition and predation risk varies characteristically between flow architectures: Flagellates with multiple flagella have higher predation risk relative to their clearance rate compared to species with only one active flagellum, with the exception of the highly successful dinoflagellates that have simultaneously achieved high clearance rates and stealth behavior due to a unique flagellar arrangement. Microbial communities are shaped by trade-offs and environmental constraints, and a mechanistic explanation of foraging trade-offs is a vital part of understanding the eukaryotic communities that form the basis of pelagic food webs. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Clearance rate \| predation risk \| flow disturbance \| point force models
语种	英语
scopus关键词	article; cell body; controlled study; dinoflagellate; flagellate; flagellum; food web; foraging; kinematics; microbial community; nonhuman; predation risk; protist; swimming speed
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/180939
作者单位	Centre for Ocean Life, National Institute of Aquatic Resources, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark
推荐引用方式 GB/T 7714	Nielsen L.T.,Kiørboe T.. Foraging trade-offs, flagellar arrangements, and flow architecture of planktonic protists[J],2021,118(3).
APA	Nielsen L.T.,&Kiørboe T..(2021).Foraging trade-offs, flagellar arrangements, and flow architecture of planktonic protists.Proceedings of the National Academy of Sciences of the United States of America,118(3).
MLA	Nielsen L.T.,et al."Foraging trade-offs, flagellar arrangements, and flow architecture of planktonic protists".Proceedings of the National Academy of Sciences of the United States of America 118.3(2021).