DOI: 10.1111/ele.12833
Scopus记录号: 2-s2.0-85031491665
论文题名: Native insect herbivory overwhelms context dependence to limit complex invasion dynamics of exotic weeds
作者: Schultz E.L. ; Eckberg J.O. ; Berg S.S. ; Louda S.M. ; Miller T.E.X.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2017
卷: 20, 期: 11 起始页码: 1374
结束页码: 1384
语种: 英语
英文关键词: Cirsium vulgare
; demography
; density-dependence
; environmental context
; hierarchical Bayesian model
; insect herbivory
; integral projection models
; invasive species
; population dynamics
Scopus关键词: Cirsium
; Cirsium vulgare
; Hexapoda
英文摘要: Understanding the role of consumers in density-dependent plant population dynamics is a long-standing goal in ecology. However, the generality of herbivory effects across heterogeneous landscapes is poorly understood due to the pervasive influence of context-dependence. We tested effects of native insect herbivory on the population dynamics of an exotic thistle, Cirsium vulgare, in a field experiment replicated across eight sites in eastern Nebraska. Using hierarchical Bayesian analysis and density-dependent population models, we found potential for explosive low-density population growth (λ > 5) and complex density fluctuations under herbivore exclusion. However, herbivore access drove population decline (λ < 1), suppressing complex fluctuations. While plant–herbivore interaction outcomes are famously context-dependent, we demonstrated that herbivores suppress potentially invasive populations throughout our study region, and this qualitative outcome is insensitive to environmental context. Our novel use of Bayesian demographic modelling shows that native insect herbivores consistently prevent hard-to-predict fluctuations of weeds in environments otherwise susceptible to invasion. © 2017 John Wiley & Sons Ltd/CNRS Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107546
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Program in Ecology and Evolutionary Biology, Department of BioSciences, Rice University, Houston, TX, United States; School of Biological Sciences, University of Nebraska, Lincoln, NE, United States; Department of Computer and Information Sciences, University of St. Thomas, Saint Paul, MN, United States; Xerces Society for Invertebrate Conservation, Portland, OR, United States
Recommended Citation:
Schultz E.L.,Eckberg J.O.,Berg S.S.,et al. Native insect herbivory overwhelms context dependence to limit complex invasion dynamics of exotic weeds[J]. Ecology Letters,2017-01-01,20(11)