Do Species with Large Capitula Suffer Higher Rates of Predispersal Seed Loss than Species with Small Capitula? A Field Survey of 34 Asteraceae Species in an Alpine Meadow

doi:10.1086/698766

	Do Species with Large Capitula Suffer Higher Rates of Predispersal Seed Loss than Species with Small Capitula? A Field Survey of 34 Asteraceae Species in an Alpine Meadow
	Zhang, Yunshu 1; Yang, Yangheshan 1; Xi, Xinqiang 1; Niklas, Karl J.2; Sun, Shucun 3
刊名	INTERNATIONAL JOURNAL OF PLANT SCIENCES
	2018-09-01
卷号	179 期号:7 页码:554-559
关键词	evolutionary ecology Asteraceae predispersal seed loss tephritid fly alpine meadow
ISSN号	1058-5893
DOI	10.1086/698766
产权排序	3
文献子类	Article
英文摘要	Premise of research.Capitulum (flowerhead) size varies widely across Asteraceae species, even within the same community. Previous work has suggested that capitulum variation among species results from the contrasting selection processes by pollinators for larger capitulum and by predispersal seed (achene) predators for smaller capitulum. However, this explanation is contested by the finding across Asteraceae that seed loss rate per infested capitulum is lower in species with large capitula, such that large capitula do not necessarily suffer higher overall seed loss compared to species with small capitula.Methodology.We measured the capitulum size, seed size, plant aboveground biomass, seed loss per infested capitulum, and capitula infestation rates for 34 Asteraceae species in an alpine meadow to determine whether there is a capitulum size-dependent effect on overall predispersal seed loss.Pivotal results.The data show that the seed loss rate per infested capitulum decreased (but capitula infestation rate increased) with increasing capitulum size. Nevertheless, at the species level, the overall predispersal seed loss rate (seed loss rate per infested capitulum x capitula infestation rate) was higher in species with larger capitula compared to those with smaller capitula. The disadvantage of producing larger capitula was partly compensated for by the competitive advantage conferred by producing large individual seeds and greater aboveground biomass.Conclusions.Species with large capitula suffer higher rates of overall predispersal seed loss, which is consistent with the hypothesis that predispersal seed predators affect capitulum size. We suggest that biological interactions between plants and animals (e.g., pollinators and seed predators) contribute to the great diversity of capitulum size among Asteraceae species.
学科主题	Plant Sciences
URL标识	查看原文
WOS关键词	PLANT ; SIZE ; EVOLUTION ; PREDATION ; CONSEQUENCES ; DISPERSAL ; HERBIVORY ; LARVAE ; FLIES
WOS研究方向	Plant Sciences
语种	英语
出版者	UNIV CHICAGO PRESS
WOS记录号	WOS:000442312900004
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30481]
专题	成都生物研究所_生态研究
作者单位	1.Nanjing Univ, Dept Ecol, Coll Life Sci, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China; 2.Cornell Univ, Plant Biol Sect, Sch Integrat Plant Sci, Ithaca, NY 14850 USA; 3.Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Chinaa
推荐引用方式 GB/T 7714	Zhang, Yunshu,Yang, Yangheshan,Xi, Xinqiang,et al. Do Species with Large Capitula Suffer Higher Rates of Predispersal Seed Loss than Species with Small Capitula? A Field Survey of 34 Asteraceae Species in an Alpine Meadow[J]. INTERNATIONAL JOURNAL OF PLANT SCIENCES,2018,179(7):554-559.
APA	Zhang, Yunshu,Yang, Yangheshan,Xi, Xinqiang,Niklas, Karl J.,&Sun, Shucun.(2018).Do Species with Large Capitula Suffer Higher Rates of Predispersal Seed Loss than Species with Small Capitula? A Field Survey of 34 Asteraceae Species in an Alpine Meadow.INTERNATIONAL JOURNAL OF PLANT SCIENCES,179(7),554-559.
MLA	Zhang, Yunshu,et al."Do Species with Large Capitula Suffer Higher Rates of Predispersal Seed Loss than Species with Small Capitula? A Field Survey of 34 Asteraceae Species in an Alpine Meadow".INTERNATIONAL JOURNAL OF PLANT SCIENCES 179.7(2018):554-559.