Faster Evolution in Tropical Lichens
Author Information
Author(s): Lumbsch H Thorsten, Hipp Andrew L, Divakar Pradeep K, Blanco Oscar, Crespo Ana
Primary Institution: The Field Museum
Hypothesis
Rate discrepancies in parmelioid lichens may be explained by shifts in moisture regime or other environmental conditions.
Conclusion
The study provides evidence that lichen speciation is linked to environmental shifts, particularly in tropical and oceanic habitats.
Supporting Evidence
- The study found significant differences in evolutionary rates between tropical and semi-arid lichen clades.
- Phylogenetic analyses revealed strong support for the accelerated evolutionary rates in the Hypotrachyna clades.
- Environmental shifts were linked to speciation events in parmelioid lichens.
Takeaway
Some lichens grow faster in tropical areas because they have more water, which helps them evolve quickly.
Methodology
The study used phylogenetic analysis of DNA sequences from 128 parmelioid lichens to assess evolutionary rates and environmental shifts.
Potential Biases
Potential biases may arise from the limited number of taxa sampled and the ecological parameters measured.
Limitations
The study's conclusions may be limited by the small sample sizes for some species and the ecological data available.
Participant Demographics
The study included 128 species of parmelioid lichens from various ecological regions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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