Glacial refugia and recolonization pathways in the brown seaweed Fucus serratus

The last glacial maximum (20 000-18 000 years ago) dramatically affected extant distributions of virtually all northern European biota. Locations of refugia and postglacial recolonization pathways were examined in Fucus serratus (Heterokontophyta; Fucaceae) using a highly variable intergenic spacer...

Full description

Saved in:

Bibliographic Details
Published in:	Molecular ecology Vol. 16; no. 17; pp. 3606 - 3616
Main Authors:	HOARAU, G, COYER, J.A, VELDSINK, J.H, STAM, W.T, OLSEN, J.L
Format:	Journal Article
Language:	English
Published:	Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01-09-2007 Blackwell Publishing Ltd
Subjects:	Algae Botany brown algae DNA, Intergenic - chemistry DNA, Mitochondrial - chemistry Fucaceae Fucus - classification Fucus - genetics Fucus - physiology Fucus serratus Fucus vesiculosus Geography glacial refugia Glaciers Haplotypes Ice Cover macroalgae mitochondria Molecular biology Phaeophycophyta Phylogeny phylogeography Population Dynamics seaweed Sequence Analysis, DNA ANE, Eire ANE, Europe, English Channel ANE, Spain, Galicia Belgium ANE, Scandinavia ANE, British Isles, Scotland ANE, Europe, Biscay Bay ANE, Europe, Iberian Peninsula
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The last glacial maximum (20 000-18 000 years ago) dramatically affected extant distributions of virtually all northern European biota. Locations of refugia and postglacial recolonization pathways were examined in Fucus serratus (Heterokontophyta; Fucaceae) using a highly variable intergenic spacer developed from the complete mitochondrial genome of Fucus vesiculosus. Over 1500 samples from the entire range of F. serratus were analysed using fluorescent single strand conformation polymorphism. A total of 28 mtDNA haplotypes was identified and sequenced. Three refugia were recognized based on high haplotype diversities and the presence of endemic haplotypes: southwest Ireland, the northern Brittany-Hurd Deep area of the English Channel, and the northwest Iberian Peninsula. The Irish refugium was the source for a recolonization sweep involving a single haplotype via northern Scotland and throughout Scandinavia, whereas recolonization from the Brittany-Hurd Deep refugium was more limited, probably because of unsuitable soft-bottom habitat in the Bay of Biscay and along the Belgian and Dutch coasts. The Iberian populations reflect a remnant refugium at the present-day southern boundary of the species range. A generalized skyline plot suggested exponential population expansion beginning in the mid-Pleistocene with maximal growth during the Eems interglacial 128 000-67 000 years ago, implying that the last glacial maximum mainly shaped population distributions rather than demography.
Bibliography:	http://dx.doi.org/10.1111/j.1365-294X.2007.03408.x ArticleID:MEC3408 istex:1986FCB947F915EFCDB6AF2260E40D5749148028 ark:/67375/WNG-9HX11PC4-R ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0962-1083 1365-294X
DOI:	10.1111/j.1365-294X.2007.03408.x