03650naa a2200589 a 450000100080000000500110000800800410001902400380006010000200009824502090011826000090032752019180033665000130225465000140226765000200228165000220230165000160232365000180233965000120235765000150236965000150238465000240239965000230242365000120244665000230245865000110248165000250249265300230251765300250254065300100256565300190257565300390259465300190263365300200265265300300267265300290270265300260273165300100275765300210276765300270278865300130281565300130282865300180284165300250285970000250288470000170290970000150292670000180294170000190295970000190297877300630299719062112015-03-24       2011    bl uuuu     u00u1 u    #d7 a10.1016/j.foreco.2011.07.0232DOI1 aCARNEIRO, F. S.  aEffects of selective logging on the mating system and pollen dispersal of Hymenaea courbaril L. (Leguminosae) in the Eastern Brazilian Amazon as revealed by microsatellite analysis.h[electronic resource]  c2011  aUsing nine microsatellite loci, we studied the effects of selective logging on genetic diversity, mating system and pollen dispersal in a population of the tree species Hymenaea courbaril, located in a 546 ha plot in the Tapajós National Forest, Pará State, Brazil. We analyzed 250 offspring (nursery reared seedlings) collected after a logging episode from 14 open-pollinated seed trees. These were compared to 367 seedlings from 20 open-pollinated seed trees previously collected from the pre-logging primary forest. The genetic diversity was significantly lower in the post-logging seed cohort. In contrast to the pre-logging population, significant levels of selfing were detected in the post-logging population (tm = 0.962, P &lt 0.05). However, correlated matings were reduced and the effective number of pollen donors almost doubled after harvesting (3.8 against 7.2). Logging also reduced pollen immigration into the plot (from 55% to 38%) and we found no significant correlation between the size of the pollen donors and the number of seeds fathered. Inside the plot, pollen dispersal distance was shorter before logging than after (827 and 952 m, respectively) and the reproductive pollination neighbor area (Aep) was larger (average of 178 ha). The individual and average variance effective population size within families (ranged from 1.80 to 3.21, average of 2.47) was lower than expected in panmictic populations (Ne = 4). The results indicate that while logging greatly reduced the levels of genetic diversity after logging, it also increased genetic recombination within the population and constrained crossing among related individuals. The results show that low-density tropical tree species such as H. courbaril, when harvested in moderate levels may be resilient to a reduction in the reproductive population and may maintain similar levels of outcrossing and pollen dispersal after logging.  aAmazonia  agene flow  aGenetic markers  aGenetic variation  aPollen flow  aTropical wood  aÁrvore  aCruzamento  aDispersão  aEssência florestal  aHymenaea courbaril  aJatobá  aMarcador genético  aPólen  aVariação genética  aAmazônia Oriental  aAtividade madeireira  aCruce  aEastern Amazon  aFloresta Nacional do Tapajós (PA)  aFlujo de polen  aMadera tropical  aManejo florestal seletivo  aMarcador microssatélite  aMarcadores genéticos  aPará  aPollen dispersal  aReduced impact logging  aSSR loci  aTropical  aTropical tree  aVariación genética1 aLACERDA, A. E. B. de1 aLEMES, M. R.1 aGRIBEL, R.1 aKANASHIRO, M.1 aWADT, L. H. O.1 aSEBBENN, A. M.  tForest Ecology and Management, V. 262, p. 1758-1765, 2011.