Bonnier Julien, Schmitt Sylvain, Sáez Laguna Enrique, Troispoux Valérie, Cazal Saint Omer, Traissac Stéphane, Brunaux Olivier, Heuertz Myriam, Tysklind Niklas.
2024. Potential for evolutionary responses to climate change in the tropical tree species Dicorynia guianensis.
In : ECCB 2024 - 7th European Congress of Conservation Biology: Biodiversity positive by 2030. Book of abstracts. SCB
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Résumé : Rainforests play a pivotal role in sustaining life on Earth by delivering essential ecosystem services. Tropical rainforest regions worldwide face imminent threats of habitat and biodiversity loss due to agricultural development, mining, overexploitation of timber, and climate change. Preserving genetic diversity within tropical rainforest species is thus imperative for ensuring their continued adaptability and resilience in a changing world. Within the smaller context of French Guiana, the specters of climate change, affecting temperature and rainfall, pose unprecedented challenges to this ecosystem, including on the hyperdominant tree species, Dicorynia guianensis (Fabaceae), commonly known as Angelique. Genetic data suggest a strong differentiation of populations in the west of French Guiana and regionally variable population demographic histories. New genome resequencing data allows us to examine regional-scale genomic signatures of adaptation to climate and soil in this drought-sensitive species and to model genetics-informed distribution range projections under future climate regimes. High-throughput SSR-Seq data will provide further insights into the local-scale family structure which may explain differences among sites in colonization dynamics and in local-scale spatial genetic structure. Understanding genetic responses to climate will enable us to develop conservation strategies adapted to the challenges posed by future climate scenarios.
Auteurs et affiliations
- Bonnier Julien, UAG (GUF)
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Schmitt Sylvain, CIRAD-ES-UPR Forêts et sociétés (FRA)
ORCID: 0000-0001-7759-7106
- Sáez Laguna Enrique, Université de Bordeaux (FRA)
- Troispoux Valérie, INRAE (GUF)
- Cazal Saint Omer, INRAE (FRA)
- Traissac Stéphane, AgroParisTech (FRA)
- Brunaux Olivier, ONF (GUF)
- Heuertz Myriam, Université de Bordeaux (FRA)
- Tysklind Niklas, INRAE (FRA)
Source : Cirad-Agritrop (https://agritrop.cirad.fr/611849/)
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