NDLI: Spatial genetic structure of simarouba amara aubl. (simaro뫎ae), a dioecious, animal-dispersed.

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Spatial genetic structure of simarouba amara aubl. (simaro뫎ae), a dioecious, animal-dispersed.

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Author	Tree, Neotropical Hardesty, Bd Dick, Cw Kremer, A. Hubbell, S. Bermingham, E.
Abstract	Simarouba amara (Simaroubaceae) is a vertebrate-dis-persed, insect-pollinated Neotropical tree found in lowland moist forest from upper Mesoamerica to the Amazon basin. We assessed the spatial genetic structure of S. amara within the 50-ha Forest Dynamics Plot on Barro Colorado Island in the Republic of Panama. A total of 300 individuals were genotyped using five microsatellite loci, represen-ting 100 individuals with a dbhX10 cm, 100 individuals of 1–10 cm dbh, and 100 individuals of o1 cm dbh. The 200 individuals in the two larger size classes were also genotyped with 155 AFLP loci. Spatial autocorrelation analysis using Moran’s Index detected significant genotypic association at the smallest distance classes for 1–10 cm dbh (0–20 m) and 410 cm dbh (0–40 m) size categories. Signi-ficant spatial autocorrelations were detected over larger scales (0–140 m) in o1 cm dbh individuals. The relatively weak genetic structure of S. amara, in comparison to other recent studies, may be explained by pollen and seed dispersal over the 50 ha plot, overlapping seed shadows, and postrecruitment mortality.
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Subject Keyword	Spatial Genetic Structure Cm Dbh Simarouba Amara Aubl Moran Index Ha Plot Seed Shadow Aflp Locus Seed Dispersal Insect-pollinated Neotropical Tree Microsatellite Locus Distance Class Significant Genotypic Association Signi-ficant Spatial Autocorrelations Upper Mesoamerica Weak Genetic Structure 50-ha Forest Dynamic Plot Spatial Autocorrelation Analysis Size Category Simarouba Amara Postrecruitment Mortality O1 Cm Dbh Lowland Moist Forest Size Class Recent Study Barro Colorado Island Dbhx10 Cm O1 Cm Dbh Individual Amazon Basin
Content Type	Text

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