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Updated: Jun 5, 2025

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Published on: December 2, 2022
Ecological diversification in sexual and asexual lineages
P Catalina Chaparro-Pedraza1,2,3,4, Gregory Roth5, Carlos J Melián6,7,8
1Department of Fish Ecology and Evolution, Swiss Federal Institute of Aquatic Science and Technology (EAWAG), Kastanienbaum, Switzerland. Catalina.Chaparro@eawag.ch.
Sexual reproduction can lead to greater species diversity. While asexual lineages diversify faster initially due to stronger selection, sexual reproduction with genetic mixing ultimately allows for faster niche occupancy and higher diversity.
Area of Science:
- Evolutionary biology
- Ecology
- Genetics
Background:
- The role of reproductive mode in speciation is not fully understood.
- Understanding how sex influences ecological diversification is crucial.
Purpose of the Study:
- To investigate the interaction between natural selection, genetic mixing, and reproductive mode in ecological diversification.
- To analyze how these interactions affect the evolutionary dynamics of diversifying lineages.
Main Methods:
- Modeling ecological diversification for sexual and asexual lineages.
- Diversification driven by intraspecific resource competition.
Main Results:
- Reproductive mode significantly impacts diversification rate and species diversity.
- Asexual lineages show faster initial diversification due to stronger ecologically-based selection.
- Sexual lineages, with genetic mixing, achieve faster niche occupancy and greater diversity.
Conclusions:
- Sexual reproduction, despite initial slower diversification, can lead to higher overall species diversity.
- Genetic mixing in sexual lineages accelerates trait expansion and niche occupancy.
- The findings suggest a key reason for the prevalence of sexual reproduction in nature.
Related Concept Videos
Formation of Species
Asexual Reproduction
Speciation Rates
The Evidence for Evolution
Types of Selection
Diversity of Protists II

