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Spatial Scales of Pollen and Seed-Mediated Gene Flow in Tropical Rain Forest Trees
Reviewing studies of gene flow and population genetic structure in tropical rain forest trees and places them in ecological and biogeographic context finds significantly higher genetic differentiation in tropical trees.
Pollen dispersal of tropical trees (Dinizia excelsa: Fabaceae) by native insects and African honeybees in pristine and fragmented Amazonian rainforest
The results suggest that in highly disturbed habitats Apis mellifera may expand genetic neighbourhood areas, thereby linking fragmented and continuous forest populations, and that large areas of rainforest must be preserved to maintain minimum viable populations.
Using genetic markers to estimate the pollen dispersal curve
This work generalizes the previously developed twogener method, assuming that the pollen dispersal curve belongs to particular one‐ or two‐parameter families of dispersal curves and estimating simultaneously the parameters of the dispersal Curve and the effective density of reproducing individuals in the population.
Forests of the Past: A Window to Future Changes
The study of past forest change provides a necessary historical context for evaluating the outcome of human-induced climate change and biological invasions. Retrospective analyses based on fossil and…
Molecular Systematic Analysis Reveals Cryptic Tertiary Diversification of a Widespread Tropical Rain Forest Tree
- C. Dick, Kobinah Abdul-Salim, E. Bermingham
- Environmental ScienceThe American Naturalist
- 4 November 2003
This study establishes three marine dispersal events leading to the colonization of Mesoamerica, the Amazon basin, and the West Indies, thus supporting the paleontological data and providing a historical biogeographic hypothesis to account for differences in the patterns of β diversity within MesOamerican and Amazonian forests.
Genetic rescue of remnant tropical trees by an alien pollinator.
- C. Dick
- Environmental ScienceProceedings. Biological sciences
- 22 November 2001
Canopy observations indicated that African honeybees were the predominant floral visitors in fragmented habitats and replaced native insects in isolated pasture trees, and may alter the genetic structure of remnant populations through frequent long-distance gene flow.
The role of immigrants in the assembly of the South American rainforest tree flora.
- R. Pennington, C. Dick
- Environmental Science, BiologyPhilosophical transactions of the Royal Society…
- 29 October 2004
Data on the community-level similarity between South American and palaeotropical rainforests is presented, and it is suggested that most taxonomic similarity derives from trans-oceanic dispersal, rather than a shared Gondwanan history.
Pervasive alteration of tree communities in undisturbed Amazonian forests
It is shown that, over the past two decades, forests in a central Amazonian landscape have experienced highly nonrandom changes in dynamics and composition, which could have important impacts on the carbon storage, dynamics and biota of Amazonian forests.
Long‐distance gene flow and cross‐Andean dispersal of lowland rainforest bees (Apidae: Euglossini) revealed by comparative mitochondrial DNA phylogeography
Phylogeographical structure across a broad spatial scale is weaker in euglossine bees than in any neotropical group previously examined, and may derive from a combination of Quaternary speciation, population expansion and/or long‐distance gene flow.
Genetic structure of Mesoamerican populations of Big‐leaf mahogany (Swietenia macrophylla) inferred from microsatellite analysis
- Rachel Roth Novick, C. Dick, M. R. Lemes, C. Navarro, A. Caccone, E. Bermingham
- BiologyMolecular ecology
- 1 September 2003
The results of this study demonstrate greater phylogeographic structure than has been found across Amazon basin S. macrophylla, suggesting a relatively complex Mesoamerican biogeographic history and lead to the prediction that other Central American trees will show similar patterns of regional differentiation.