Rapid lineage diversification of gray mangroves (Avicennia marina) driven by isolation in cryptic glacial refugia and extreme environmental conditions in the Arabian Peninsula
Smith, Edward G.
Lovelock, Catherine E.
Duarte, Carlos M.
Burt, John A.
KAUST DepartmentMarine Science Program
Red Sea Research Center (RSRC)
Biological and Environmental Science and Engineering (BESE) Division
Computational Bioscience Research Center (CBRC)
Permanent link to this recordhttp://hdl.handle.net/10754/685762
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AbstractPlant systems occurring in ecologically heterogeneous and spatially discontinuous habitats provide an ideal opportunity to investigate the relative roles of neutral and selective factors in driving lineage diversification. Here, we analyzed fully sequenced genomes to study diversification mechanisms in the gray mangroves [Avicennia marina (Forssk.) Vierh.] of Arabia, where they occur at the edge of the species’ range and are subject to variable, often extreme, environmental conditions. We conducted population structure, phylogenomic and demographic analyses to reconstruct the evolutionary history of the species across Arabia. We also applied genotype-environment association methods to study adaptive mechanisms of lineage diversification. Our analyses revealed marked genetic structure and highly supported clades among and within the seas surrounding the Arabian Peninsula. Inferred divergence times were consistent with recent periods of low marine connectivity during glacial periods, revealing the presence of (cryptic) glacial refugia in the Red Sea and the Persian/Arabian Gulf. Genetic-environment association analyses revealed high levels of adaptive differentiation, and detected signs of multi-loci local adaptation driven by temperature extremes and hypersalinity. These results support a process of rapid diversification resulting from the combined effects of historical factors and ecological selection, and reveal mangrove peripheral environments as relevant drivers of lineage diversity.
CitationFriis, G., Smith, E. G., Lovelock, C. E., Ortega, A., Marshell, A., Duarte, C. M., & Burt, J. A. (2022). Rapid lineage diversification of gray mangroves (Avicennia marina) driven by isolation in cryptic glacial refugia and extreme environmental conditions in the Arabian Peninsula . https://doi.org/10.22541/au.165451878.80994363/v3
SponsorsThe authors are grateful to NYUAD’s Core Bioinformatics for analysis and computational assistance. We thank Mark Priest, Dain McParland, Noura Al-Mansoori, Anique Ahmad, and Ada Kovaliukaite for their participation in the fieldwork. We gratefully acknowledge the Environment Agency Abu Dhabi (permit reference number 20181823a), and the Oman Ministry of Environment and Climate Affairs, Director General of Nature Conservation (permit number: 6210/10/75), for providing permits for research related to this manuscript. This work was supported by New York University Abu Dhabi Institute Grant (73 71210 CGSB9) provided by Tamkeen, NYUAD Faculty Research Funds (AD060) and King Abdullah University of Science and Technology baseline funding to CMD.