气候变化领域集成服务门户(CCPortal): Stage-specific overcompensation, the hydra effect, and the failure to eradicate an invasive predator

CCPortal

DOI	10.1073/pnas.2003955118
	Stage-specific overcompensation, the hydra effect, and the failure to eradicate an invasive predator
	Grosholz E.; Ashton G.; Bradley M.; Brown C.; Ceballos-Osuna L.; Chang A.; de Rivera C.; Gonzalez J.; Heineke M.; Marraffini M.; McCann L.; Pollard E.; Pritchard I.; Ruiz G.; Turner B.; Tepolt C.
发表日期	2021
ISSN	00278424
卷号	118 期号:12
英文摘要	As biological invasions continue to increase globally, eradication programs have been undertaken at significant cost, often without consideration of relevant ecological theory. Theoretical fisheries models have shown that harvest can actually increase the equilibrium size of a population, and uncontrolled studies and anecdotal reports have documented population increases in response to invasive species removal (akin to fisheries harvest). Both findings may be driven by high levels of juvenile survival associated with low adult abundance, often referred to as overcompensation. Here we show that in a coastal marine ecosystem, an eradication program resulted in stage-specific overcompensation and a 30-fold, single-year increase in the population of an introduced predator. Data collected concurrently from four adjacent regional bays without eradication efforts showed no similar population increase, indicating a local and not a regional increase. Specifically, the eradication program had inadvertently reduced the control of recruitment by adults via cannibalism, thereby facilitating the population explosion. Mesocosm experiments confirmed that adult cannibalism of recruits was size-dependent and could control recruitment. Genomic data show substantial isolation of this population and implicate internal population dynamics for the increase, rather than recruitment from other locations. More broadly, this controlled experimental demonstration of stage-specific overcompensation in an aquatic system provides an important cautionary message for eradication efforts of species with limited connectivity and similar life histories. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Hydra effect \| biological invasions \| overcompensation \| eradication \| predator mortality
语种	英语
scopus关键词	adult; article; bay; cannibalism; explosion; Hydra; life history; marine environment; mesocosm; mortality; nonhuman; population dynamics; predator; species invasion
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/180163
作者单位	Department of Environmental Science and Policy, University of California, Davis, CA 95616, United States; Smithsonian Environmental Research Center, Edgewater, MD 21037, United States; Department of Environmental Science and Management, Portland State University, Portland, OR 97207, United States; Woods Hole OceanographicInstitution, Woods Hole, MA 02543, United States
推荐引用方式 GB/T 7714	Grosholz E.,Ashton G.,Bradley M.,et al. Stage-specific overcompensation, the hydra effect, and the failure to eradicate an invasive predator[J],2021,118(12).
APA	Grosholz E..,Ashton G..,Bradley M..,Brown C..,Ceballos-Osuna L..,...&Tepolt C..(2021).Stage-specific overcompensation, the hydra effect, and the failure to eradicate an invasive predator.Proceedings of the National Academy of Sciences of the United States of America,118(12).
MLA	Grosholz E.,et al."Stage-specific overcompensation, the hydra effect, and the failure to eradicate an invasive predator".Proceedings of the National Academy of Sciences of the United States of America 118.12(2021).