EconPapers    
Economics at your fingertips  
 

Influence of dispersal, stochasticity, and an Allee effect on the persistence of weed biocontrol introductions

Ian D. Jonsen, Robert S. Bourchier and Jens Roland

Ecological Modelling, 2007, vol. 203, issue 3, 521-526

Abstract: An important problem encountered in biocontrol is the failure of introduced populations to establish and persist. Recent biocontrol studies focus on the roles of environmental stochasticity and Allee effects in determining introduction persistence but few studies consider the role of dispersal. We use a spatially explicit simulation model that incorporates dispersal and spatio-temporally random population growth to show that elevated emigration rates can exacerbate the negative influences of environmental stochasticity and Allee effects on introduction persistence. However, successful immigration can compensate partly for the otherwise reduced persistence that occurs when environmental stochasticity is high. These results illustrate that dispersal can have antagonistic effects on the persistence of biocontrol introductions and failure to consider the dispersal ability and typical emigration rates of biocontrol agents may yield misleading predictions regarding successful establishment.

Keywords: Emigration; Immigration; Invasion; Landscape; Simulation; Weed biocontrol (search for similar items in EconPapers)
Date: 2007
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0304380006006284
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:203:y:2007:i:3:p:521-526

DOI: 10.1016/j.ecolmodel.2006.12.009

Access Statistics for this article

Ecological Modelling is currently edited by Brian D. Fath

More articles in Ecological Modelling from Elsevier
Bibliographic data for series maintained by Catherine Liu ().

 
Page updated 2025-03-19
Handle: RePEc:eee:ecomod:v:203:y:2007:i:3:p:521-526