Oral Paper

         Population Genetics/Genomics

Genome-enabled approaches for elucidating the evolutionary history and spatial genetic structure of Guzmania monostachia (Bromeliaceae) in Florida

Presenting Author
Grant Godden
Description
Bromeliaceae (bromeliads) are an angiosperm clade with high diversity in the Neotropics, where representatives occupy terrestrial and arboreal habitats in diverse biomes ranging from deserts to rainforests. Many species are ecologically important, helping maintain local biodiversity by accumulating, storing, and releasing water and nutrients in their respective environments, and providing microhabitats and sustenance for communities of aquatic and terrestrial lifeforms. In Florida, 10 of 16 native bromeliad species are threatened or endangered, and 12 are being decimated by an introduced weevil from Mexico, Metamasius callizona Chevrolat. The rapid declines and demographic shifts observed within and among remaining populations are severe and threaten loss of valuable ecosystem services throughout South Florida. Urgent conservation actions are needed to safeguard Florida’s imperiled bromeliads, but a baseline understanding of their genetics is both lacking and needed to guide the development of effective policies and practices. To help address this knowledge gap, we assembled a reference genome for one species of conservation concern, Guzmania monostachia Rusby ex Mez, as well as generated whole-genome shotgun reads for individual samples representing the full Neotropical distribution of the species and population-level samples from within Florida. We are using these genomic data to: (i) infer the interrelationships and evolutionary origins of G. monostachia and (ii) characterize the genetic diversity and spatial structure of Floridian populations. We will provide a general update on our progress concerning each of these goals, as well as highlight results and implications for future bromeliad conservation in Florida.