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. 2023 Oct;59(5):1041-1052.
doi: 10.1111/jpy.13363. Epub 2023 Jul 12.

Phylogeography of the red alga Gracilariopsis tenuifrons (Gracilariales) along the Brazilian coast

Andre V F Faria  1 , Nuno T Martins  1 , Ligia M Ayres-Ostrock  1   2 , Carlos F D Gurgel  3 , Estela M Plastino  1
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Phylogeography of the red alga Gracilariopsis tenuifrons (Gracilariales) along the Brazilian coast

Andre V F Faria et al. J Phycol. 2023 Oct.

Abstract

Changes in the sea level during the Holocene are regarded as one of the most prevalent drivers of the diversity and distribution of macroalgae in Brazil, influenced by the emergence of the Vitória-Trindade seamount chain (VTC). Gracilariopsis tenuifrons has a wide geographic distribution along the Brazilian coast, from Maranhão state (2°48'64.3" S) to Santa Catarina state (27.5°73'83" S). The knowledge of historical processes affecting diversity may allow the development of conservation strategies in environments against anthropogenic influence. Therefore, knowledge about phylogeography and populational genetic diversity in G. tenuifrons is necessary. Six populations were sampled along the northeastern tropical (Maranhão-MA, Rio Grande do Norte-RN, Alagoas-AL, and Bahia-BA States) and southeastern subtropical (São Paulo "Ubatuba"-SP1 and São Paulo "Itanhaém"-SP2 States) regions along the Brazilian coast. The genetic diversity and structure of G. tenuifrons were inferred using mitochondrial (COI-5P and cox2-3 concatenated) DNA markers. Gracilariopsis tenuifrons populations showed an evident separation between the northeast (from 2°48'64.3" S to 14°18'23" S; 17 haplotypes) and the southeast (from 23°50'14.9" S to 24°20'04.7" S; 10 haplotypes) regions by two mutational steps between them. The main biogeographical barrier to gene flow is located nearby the VTC. The southeast region (São Paulo State) is separated by two subphylogroups (SP1, three haplotypes and SP2, six haplotypes), and Santos Bay (estuary) has been considered a biogeographical barrier between them. The presence of genetic structure and putative barriers to gene flow are in concordance with previous studies reporting biogeographic breaks in the southwest Atlantic Ocean, including the genetic isolation between northeast and southeast regions for red and brown algae in the vicinity of the VTC.

Keywords: COI-5P; cox2-3; gene flow; geographic barriers; haplotypes.

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References

REFERENCES

    1. Anderson, M. J., Gorley, R. N., & Clarke, K. R. (2008). PERMANOVA+ for PRIMER: Guide to software and statistical methods. PRIMER-E Ltd.
    1. Antonovics, J. (1976). The nature of the limits to natural selection. Annals of the Missouri Botanical Garden, 63(2), 224-247. https://doi.org/10.2307/2395303
    1. Avise, J. C., Walker, D., & Johns, G. C. (1998). Speciation durations and Pleistocene effects on vertebrate phylogeography. Proceedings of the Royal Society B: Biological Sciences, 265(1407), 1707-1712. https://doi.org/10.1098/rspb.1998.0492
    1. Ayres-Ostrock, L. M., Valero, M., Mauger, S., Oliveira, M. C., Plastino, E. M., Guillemin, M. L., & Destombe, C. (2019). Dual influence of terrestrial and marine historical processes on the phylogeography of the Brazilian intertidal red alga Gracilaria caudata. Journal of Phycology, 55(5), 1096-1114. https://doi.org/10.1111/jpy.12892
    1. Ballard, J. W., & Whitlock, M. C. (2004). The incomplete natural history of mitochondria. Molecular Ecology, 13(4), 729-744. https://doi.org/10.1046/j.1365-294x.2003.02063.x

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