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Molecular evolution and the latitudinal biodiversity gradient
E J Dowle1, M Morgan-Richards, S A Trewick
1Massey University, Palmerston North, New Zealand. e.j.dowle@massey.ac.nz
Heredity
|March 15, 2013
Summary
Species density is higher in the tropics, creating a latitudinal biodiversity gradient (LBG). This study reviews molecular evidence to understand if speciation rates drive this gradient.
Area of Science:
- Ecology and Evolutionary Biology
- Molecular Evolution
- Biodiversity Science
Background:
- Species density decreases with latitude, forming a latitudinal biodiversity gradient (LBG).
- The drivers of LBG, including speciation, extinction, and immigration rates, remain debated.
- Recent research links molecular evolution rates to speciation rates, suggesting a role in LBG.
Purpose of the Study:
- To review molecular genetic evidence concerning the latitudinal biodiversity gradient (LBG).
- To examine factors influencing rates of molecular evolution.
- To critically assess the relationship between speciation rates and molecular evolution.
Main Methods:
- Literature review of molecular genetic studies.
- Analysis of factors affecting molecular evolution rates.
- Examination of the directionality between speciation and molecular evolution.
Main Results:
- Molecular evolution rates may be linked to speciation rates.
- Factors influencing molecular evolution rates are diverse.
- The precise relationship and directionality between speciation and molecular evolution require further clarification.
Conclusions:
- Molecular evolution is a potential driver of the latitudinal biodiversity gradient (LBG).
- Understanding the interplay between molecular evolution and speciation is crucial for explaining biodiversity patterns.
- Further research is needed to confirm the causal links and underlying mechanisms.
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