Coastal dunefields maintain pre-Holocene genetic structure in a rocky shore red alga.

Autor: Mmonwa KL; Research and Monitoring, KwaZulu-Natal Sharks Board, Umhlanga Rocks, South Africa., Barker NP; Department of Plant and Soil Sciences, University of Pretoria, Hatfield, South Africa., McQuaid CD; Coastal Research Group, Department of Zoology and Entomology, Rhodes University, Grahamstown, South Africa., Teske PR; Centre for Ecological Genomics and Wildlife Conservation, Department of Zoology, University of Johannesburg, Auckland Park, 2006, South Africa.
Jazyk: angličtina
Zdroj: Journal of phycology [J Phycol] 2021 Oct; Vol. 57 (5), pp. 1542-1553. Date of Electronic Publication: 2021 Jun 22.
DOI: 10.1111/jpy.13182
Abstrakt: Most intertidal algae have limited dispersal potential, and areas that lack hard substratum suitable for attachment are thus expected to isolate regional populations from each other. Here, we used nuclear and mitochondrial genetic data to compare genetic structure in two co-distributed intertidal red algae with different dispersal potential along the South African coastline. Gelidium pristoides is divided into a south-eastern and a south-western evolutionary lineage separated by extensive, continuous sandy shoreline habitat adjacent to coastal dunefields. In contrast, Hypnea spicifera is genetically homogeneous throughout its range. In G. pristoides, the genetic breaks are associated with contemporary coastal dunefields. The age of the divergence event suggests that this may reflect the effect of older dispersal barriers, and that genetic structure was subsequently maintained by the formation of contemporary coastal dunefields.
(© 2021 Phycological Society of America.)
Databáze: MEDLINE
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