Publications by authors named "Camille Ameline"
Article Synopsis
- The study investigates how extinction and recolonization in habitat patches affect the evolution of metapopulations, specifically comparing them to larger, stable populations.* -
- Using whole-genome pool-sequencing on 60 subpopulations of Daphnia magna, researchers found that metapopulations show lower genetic diversity and higher differentiation, supporting the propagule model which states that colonization leads to genetic bottlenecks.* -
- The results indicate that younger and more isolated subpopulations experience reduced effective population sizes and genetic drift, revealing that the evolutionary dynamics of metapopulations differ significantly from those of larger, stable populations.*
Although parasite-mediated selection is a major driver of host evolution, its influence on genetic variation for parasite resistance is not yet well understood. We monitored resistance in a large population of the planktonic crustacean over 8 years, as it underwent yearly epidemics of the bacterial pathogen . We observed cyclic dynamics of resistance: Resistance increased throughout the epidemics, but susceptibility was restored each spring when hosts hatched from sexual resting stages.
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- Understanding how genetic diversity is maintained in natural populations is crucial for evolutionary biology, especially in the context of coevolving hosts and parasites.
- This study focuses on a bacterial parasite's infection characteristics by examining over 50 isolates and their interactions with 12 genotypes of the host, Daphnia magna, revealing significant variation in parasite phenotypes and multiple infection strategies.
- The findings suggest that infection success does not depend on geographic distance, supporting the Red Queen hypothesis that both hosts and parasites evolve to maintain high genetic diversity in their interactions.
Parasites are a major evolutionary force, driving adaptive responses in host populations. Although the link between phenotypic response to parasite-mediated natural selection and the underlying genetic architecture often remains obscure, this link is crucial for understanding the evolution of resistance and predicting associated allele frequency changes in the population. To close this gap, we monitored the response to selection during epidemics of a virulent bacterial pathogen, Pasteuria ramosa, in a natural host population of Daphnia magna.
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