Community‐wide correlations between species richness, abundance and population genomic diversity in a freshwater biodiversity hotspot

Understanding patterns of diversity across macro (e.g. species‐level) and micro (e.g. molecular‐level) scales can shed light on community function and stability by elucidating the abiotic and biotic drivers of diversity within ecological communities. We examined the relationships among taxonomic and...

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Veröffentlicht in:Molecular ecology Jg. 32; H. 22; S. 5894 - 5912
Hauptverfasser: Bucholz, Jamie R., Hopper, Garrett W., González, Irene Sánchez, Kelley, Taylor E., Jackson, Colin R., Garrick, Ryan C., Atkinson, Carla L., Lozier, Jeffrey D.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: England Blackwell Publishing Ltd 01.11.2023
Schlagworte:
Abundance
Animals
Biodiversity
Biodiversity hot spots
Bivalvia - genetics
Correlation
Density
Ecosystem
Evolution
Fresh Water
freshwater
Gene sequencing
Genetic diversity
genetic variation
genome
Humans
Hypotheses
Metagenomics
Mollusks
Mussels
River basins
Rivers
Species diversity
Species richness
Unionidae
abundance-genetic diversity correlations
RADseq
species-genetic diversity correlations
Unionidae
more-individuals hypothesis
ISSN:0962-1083, 1365-294X, 1365-294X
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Zusammenfassung:Understanding patterns of diversity across macro (e.g. species‐level) and micro (e.g. molecular‐level) scales can shed light on community function and stability by elucidating the abiotic and biotic drivers of diversity within ecological communities. We examined the relationships among taxonomic and genetic metrics of diversity in freshwater mussels (Bivalvia: Unionidae), an ecologically important and species‐rich group in the southeastern United States. Using quantitative community surveys and reduced‐representation genome sequencing across 22 sites in seven rivers and two river basins, we surveyed 68 mussel species and sequenced 23 of these species to characterize intrapopulation genetic variation. We tested for the presence of species diversity–abundance correlations (i.e. the more‐individuals hypothesis, MIH), species‐genetic diversity correlations (SGDCs) and abundance‐genetic diversity correlations (AGDCs) across all sites to evaluate relationships between different metrics of diversity. Sites with greater cumulative multispecies density (a standardized metric of abundance) had a greater number of species, consistent with the MIH hypothesis. Intrapopulation genetic diversity was strongly associated with the density of most species, indicating the presence of AGDCs. However, there was no consistent evidence for SGDCs. Although sites with greater overall densities of mussels had greater species richness, sites with higher genetic diversity did not always exhibit positive correlations with species richness, suggesting that there are spatial and evolutionary scales at which the processes influencing community‐level diversity and intraspecific diversity differ. Our work reveals the importance of local abundance as indicator (and possibly a driver) of intrapopulation genetic diversity. see also the Perspective by see also the Perspective by K. N. Petersen and J. P. Wares
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ISSN:0962-1083
1365-294X
1365-294X
DOI:10.1111/mec.16991