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Genetic resource impacts of habitat loss and degradation; reconciling empirical evidence and predicted theory for neotropical trees
TLDR
A simulation approach is used to assess the magnitude of expected genetic change, and 31 studies of 23 neotropical tree species are reviewed to assess whether empirical case studies conform to theory.
Increased pollen flow counteracts fragmentation in a tropical dry forest: An example from Swietenia humilis Zuccarini
TLDR
This work quantifies pollen-mediated gene flow within and between forest fragments of Swietenia humilis from a highly fragmented forest mosaic to demonstrate some tropical angiosperm tree species may be much more adaptable and resilient to habitat destruction and fragmentation than previously considered.
Genetic variation within a fragmented population of Swietenia humilis Zucc.
TLDR
The initial effects of fragmentation were seen in the fragments through the loss of low‐frequency alleles present in the continuous ‘control’ stand, and the percentage of this allelic loss increased with a decrease in fragment size.
Population genetics of Cordia alliodora (Boraginaceae), a neotropical tree. 3. Gene flow, neighborhood, and population substructure
TLDR
The utility of a) rare allozyme markers and b) paternity exclusion in estimating gene dispersal in tropical forest trees was demonstrated for a population of Cordia alliodora (R. & P.) Oken in Costa Rica, indicating that deforestation and fragmentation could curtail such gene flow leading to an erosion of genetic variation within fragments.
Population genetics of Cordia alliodora (Boraginaceae), a neotropical tree. 1. Genetic variation in natural populations
TLDR
It is indicated that in situ and ex situ conservation should accord high priority to the dry zone populations of Cordia alliodora; furthermore, conservation of this widespread species would require preservation of multiple populations.
Population genetics of Cordia alliodora (Boraginaceae), a neotropical tree. 2. Mating system
TLDR
The incompatibility mechanism in C. alliodora, combined with variation in flowering and stand density, appears to lead to both temporal and spatial substructuring of the population.
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