Fronts from complex two-dimensional dispersal kernels: theory and application to Reid's paradox
dc.contributor.author
dc.date.accessioned
2011-02-07T11:25:57Z
dc.date.available
2010-12-14T10:35:58Z
2011-02-07T11:25:57Z
dc.date.issued
2007
dc.identifier.citation
Fort, J. (2007). Fronts from complex two-dimensional dispersal kernels: theory and application to Reid's paradox. Journal of Applied Physics, 101 (9), 094701. Recuperat 7 febrer 2011, a http://link.aip.org/link/JAPIAU/v101/i9/p094701/s1
dc.identifier.issn
0021-8979
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dc.description.abstract
Bimodal dispersal probability distributions with characteristic distances differing by several orders of magnitude have been derived and favorably compared to observations by Nathan [Nature (London) 418, 409 (2002)]. For such bimodal kernels, we show that two-dimensional molecular dynamics computer simulations are unable to yield accurate front speeds. Analytically, the usual continuous-space random walks (CSRWs) are applied to two dimensions. We also introduce discrete-space random walks and use them to check the CSRW results (because of the inefficiency of the numerical simulations). The physical results reported are shown to predict front speeds high enough to possibly explain Reid's paradox of rapid tree migration. We also show that, for a time-ordered evolution equation, fronts are always slower in two dimensions than in one dimension and that this difference is important both for unimodal and for bimodal kernels
dc.description.sponsorship
Funded by European Commission Grant No. NEST-28192-FEPRE, MEC-FEDER Grant No. FIS-2006-12296-C02-02, and Generalitat de Catalunya Grant No. SGR-2005-00087
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
American Institute of Physics
dc.relation
MEC/PN 2007-2009/FIS-2006-12296-C02-02
AGAUR/2005-2008/2005-SGR-00087
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Reproducció digital del document publicat a: http://dx.doi.org/10.1063/1.2733631
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© Journal of Applied Physics, 2007, vol. 101, núm. 9
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Articles publicats (D-F)
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Tots els drets reservats
dc.subject
dc.title
Fronts from complex two-dimensional dispersal kernels: theory and application to Reid's paradox
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.identifier.doi
dc.contributor.funder
dc.identifier.eissn
1089-7550