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Non-genetic phenotypic variability affects populations and communities in protist microcosms
Allan Raffard1, Staffan Jacob2, Nicolas Schtickzelle1
1Earth and Life Institute, Université catholique de Louvain, Louvain-la-Neuve, Belgium.
The Journal of Animal Ecology
|January 9, 2024
Summary
Intraspecific trait variation (ITV) impacts populations and communities differently. Genetic and non-genetic ITV effects cascade from populations to communities, influencing biodiversity and ecosystem functioning.
Area of Science:
- Ecology
- Evolutionary Biology
- Microbiology
Background:
- Intraspecific trait variation (ITV), arising from genetic and non-genetic factors, influences individual fitness and ecological interactions.
- Understanding ITV's role in population and community dynamics is crucial for scaling ecological insights.
Purpose of the Study:
- To investigate the effects of genetic and non-genetic ITV on protist populations and communities.
- To compare the relative impacts of ITV across different levels of biological organization.
Main Methods:
- Experimental manipulation of genetic and non-genetic ITV in protist microcosms.
- Assessing impacts on population growth, community composition, and biomass production over several generations.
Main Results:
- Genetic and non-genetic ITV exhibited distinct effects on populations and communities.
- ITV's influence diminished across biological levels, directly affecting populations with indirect community consequences.
Conclusions:
- Drivers of ITV have differential impacts on populations and communities.
- Cascading ITV effects across biological levels can mediate biodiversity-ecosystem functioning relationships.
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