气候变化领域集成服务门户(CCPortal): The evolution of siphonophore tentilla for specialized prey capture in the open ocean

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DOI	10.1073/pnas.2005063118
	The evolution of siphonophore tentilla for specialized prey capture in the open ocean
	Damian-Serrano A.; Haddock S.H.D.; Dunn C.W.
发表日期	2021
ISSN	00278424
卷号	118 期号:8
英文摘要	Predator specialization has often been considered an evolutionary “dead end” due to the constraints associated with the evolution of morphological and functional optimizations throughout the organism. However, in some predators, these changes are localized in separate structures dedicated to prey capture. One of the most extreme cases of this modularity can be observed in siphonophores, a clade of pelagic colonial cnidarians that use tentilla (tentacle side branches armed with nematocysts) exclusively for prey capture. Here we study how siphonophore specialists and generalists evolve, and what morphological changes are associated with these transitions. To answer these questions, we: a) Measured 29 morphological characters of tentacles from 45 siphonophore species, b) mapped these data to a phylogenetic tree, and c) analyzed the evolutionary associations between morphological characters and prey-type data from the literature. Instead of a dead end, we found that siphonophore specialists can evolve into generalists, and that specialists on one prey type have directly evolved into specialists on other prey types. Our results show that siphonophore tentillum morphology has strong evolutionary associations with prey type, and suggest that shifts between prey types are linked to shifts in the morphology, mode of evolution, and evolutionary correlations of tentilla and their nematocysts. The evolutionary history of siphonophore specialization helps build a broader perspective on predatory niche diversification via morphological innovation and evolution. These findings contribute to understanding how specialization and morphological evolution have shaped present-day food webs. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Character evolution; Nematocysts; Predation; Siphonophores; Specialization
语种	英语
scopus关键词	article; food web; morphological trait; phylogenetic tree; prey capture; sea; specialization; tentacle
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/180526
作者单位	Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06520, United States; Research Division, Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, United States; Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95064, United States
推荐引用方式 GB/T 7714	Damian-Serrano A.,Haddock S.H.D.,Dunn C.W.. The evolution of siphonophore tentilla for specialized prey capture in the open ocean[J],2021,118(8).
APA	Damian-Serrano A.,Haddock S.H.D.,&Dunn C.W..(2021).The evolution of siphonophore tentilla for specialized prey capture in the open ocean.Proceedings of the National Academy of Sciences of the United States of America,118(8).
MLA	Damian-Serrano A.,et al."The evolution of siphonophore tentilla for specialized prey capture in the open ocean".Proceedings of the National Academy of Sciences of the United States of America 118.8(2021).