气候变化领域集成服务门户(CCPortal): Invader removal triggers competitive release in a threatened avian predator

CCPortal

DOI	10.1073/pnas.2102859118
	Invader removal triggers competitive release in a threatened avian predator
	David Wiens J.; Dugger K.M.; Mark Higley J.; Lesmeister D.B.; Franklin A.B.; Hamm K.A.; White G.C.; Dilione K.E.; Simon D.C.; Bown R.R.; Carlson P.C.; Yackulic C.B.; Nichols J.D.; Hines J.E.; Davis R.J.; Lamphear D.W.; McCafferty C.; McDonald T.L.; Sovern S.G.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:31
英文摘要	Changes in the distribution and abundance of invasive species can have far-reaching ecological consequences. Programs to control invaders are common but gauging the effectiveness of such programs using carefully controlled, large-scale field experiments is rare, especially at higher trophic levels. Experimental manipulations coupled with long-term demographic monitoring can reveal the mechanistic underpinnings of interspecific competition among apex predators and suggest mitigation options for invasive species. We used a large-scale before-after control-impact removal experiment to investigate the effects of an invasive competitor, the barred owl (Strix varia), on the population dynamics of an iconic old-forest native species, the northern spotted owl (Strix occidentalis caurina). Removal of barred owls had a strong, positive effect on survival of sympatric spotted owls and a weaker but positive effect on spotted owl dispersal and recruitment. After removals, the estimated mean annual rate of population change for spotted owls stabilized in areas with removals (0.2% decline per year), but continued to decline sharply in areas without removals (12.1% decline per year). The results demonstrated that the most substantial changes in population dynamics of northern spotted owls over the past two decades were associated with the invasion, population expansion, and subsequent removal of barred owls. Our study provides experimental evidence of the demographic consequences of competitive release, where a threatened avian predator was freed from restrictions imposed on its population dynamics with the removal of a competitively dominant invasive species. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Competition; Invasive species; Population dynamics; Removal experiment; Strix owls
语种	英语
scopus关键词	article; bird; competition; demography; forest; invasive species; native species; nonhuman; population dynamics; predator
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/238675
作者单位	US Geological Survey, Forest and Rangeland Ecosystem Science Center, Corvallis, OR 97330, United States; US Geological Survey, Oregon Cooperative Fish and Wildlife Research Unit, Department of Fisheries and Wildlife, Oregon State University, Corvallis, OR 97331, United States; Hoopa Tribal Forestry, Hoopa, CA 95546, United States; US Department of Agriculture Forest Service, Pacific Northwest Research Station, Corvallis, OR 97331, United States; US Department of Agriculture Wildlife Services, National Wildlife Research Center, Fort Collins, CO 80521, United States; Green Diamond Resource Company, Korbel, CA 95550, United States; Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO 80523, United States; US Fish and Wildlife Service, Oregon State Office, Portland, OR 97266, United States; US Geological Survey, Southwest Biological Science Center, Flagstaff, AZ 86001, United States; US Geological Survey, Patuxent Wildlife Research Center, Laurel, MD 20...
推荐引用方式 GB/T 7714	David Wiens J.,Dugger K.M.,Mark Higley J.,et al. Invader removal triggers competitive release in a threatened avian predator[J],2021,118(31).
APA	David Wiens J..,Dugger K.M..,Mark Higley J..,Lesmeister D.B..,Franklin A.B..,...&Sovern S.G..(2021).Invader removal triggers competitive release in a threatened avian predator.Proceedings of the National Academy of Sciences of the United States of America,118(31).
MLA	David Wiens J.,et al."Invader removal triggers competitive release in a threatened avian predator".Proceedings of the National Academy of Sciences of the United States of America 118.31(2021).