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The Impact of Landscape Disturbance on Spatial Genetic Structure in the Guanacaste Tree, Enterolobium cyclocarpum (Fabaceae)

Gonzales, Eva; Hamrick, James L.; Smouse, Peter E; Trapnell, Dorset W.; Peakall, Rodney

Description

We examined spatial genetic structure (SGS) in Enterolobium cyclocarpum (the Guanacaste tree), a dominant tree of Central American dry forests in 4 sites in Guanacaste Province, Costa Rica. In disturbed dry forest sites (e.g., pastures), E. cyclocarpum is primarily dispersed by cattle and horses, whose movements are restricted by pasture boundaries. The study sites varied in tree densities and disturbance. Allozyme analyses of adult trees demonstrated significant levels of SGS in 3 of 4 sites....[Show more]

dc.contributor.authorGonzales, Eva
dc.contributor.authorHamrick, James L.
dc.contributor.authorSmouse, Peter E
dc.contributor.authorTrapnell, Dorset W.
dc.contributor.authorPeakall, Rodney
dc.date.accessioned2015-12-10T22:56:40Z
dc.identifier.issn0022-1503
dc.identifier.urihttp://hdl.handle.net/1885/60327
dc.description.abstractWe examined spatial genetic structure (SGS) in Enterolobium cyclocarpum (the Guanacaste tree), a dominant tree of Central American dry forests in 4 sites in Guanacaste Province, Costa Rica. In disturbed dry forest sites (e.g., pastures), E. cyclocarpum is primarily dispersed by cattle and horses, whose movements are restricted by pasture boundaries. The study sites varied in tree densities and disturbance. Allozyme analyses of adult trees demonstrated significant levels of SGS in 3 of 4 sites. SGS was primarily due to clusters of young adults located along seasonal streams, rocky areas, and in abandoned pastures. SGS was highest in the first distance class in the least disturbed population, which also had the lowest density of large adults. Low, but significant SGS characterized the site with the highest number of large adults located in individual pastures. The semiurban site, had no clusters of young adults and, probably as a result, failed to exhibit SGS. Our results demonstrate that disturbance can strongly influence SGS patterns and are consistent with a landscape model in which the location of potential recruitment sites, restricted seed disperser movements, and the number and location of maternal individuals dictate the level and pattern of SGS.
dc.publisherOxford University Press
dc.sourceJournal of Heredity
dc.subjectKeywords: alloenzyme; adult tree; article; forest; gene cluster; genetic variability; landscape; legume; nonhuman; pasture; population density; priority journal; seasonal variation; spatial autocorrelation analysis; Costa Rica; Demography; Ecosystem; Environment; F Enterolobium cyclocarpum; Landscape disturbance; Landscape genetics; Seed dispersal; Spatial genetic structure; Tropical dry forest
dc.titleThe Impact of Landscape Disturbance on Spatial Genetic Structure in the Guanacaste Tree, Enterolobium cyclocarpum (Fabaceae)
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume101
dc.date.issued2010
local.identifier.absfor060411 - Population, Ecological and Evolutionary Genetics
local.identifier.ariespublicationu9511635xPUB533
local.type.statusPublished Version
local.contributor.affiliationGonzales, Eva, Rutgers University
local.contributor.affiliationHamrick, James L., University of Georgia
local.contributor.affiliationSmouse, Peter E, Rutgers University
local.contributor.affiliationTrapnell, Dorset W., University of Georgia
local.contributor.affiliationPeakall, Rodney, College of Medicine, Biology and Environment, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage133
local.bibliographicCitation.lastpage143
local.identifier.doi10.1093/jhered/esp101
dc.date.updated2016-02-24T12:06:42Z
local.identifier.scopusID2-s2.0-77249108824
local.identifier.thomsonID000274777100001
CollectionsANU Research Publications

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