Abstract
Species of Fucus are among the dominant seaweeds along Northern Hemisphere shores, but taxonomic designations often are confounded by significant intraspecific morphological variability. We analyzed intra- and inter-specific phylogenetic relationships within the genus (275 individuals representing 16 taxa) using two regions of the mitochondrion: a variable intergenic spacer and a conserved portion of the 23S subunit. Bayesian ML and MP analyses verified a shallow phylogeny with two major lineages (previously reported) and resolved some intra-lineage relationships. Significant species-level paraphyly/polyphyly was observed within lineages 1A and 2. Despite higher species richness in the North Atlantic, a North Pacific origin of the genus is supported by a gradient of decreasing haplotype and nucleotide diversities in F. distichus from the North Pacific to the East Atlantic.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Atlantic Ocean
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Base Sequence
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DNA, Mitochondrial / genetics
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Fucus / classification*
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Fucus / genetics
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Molecular Sequence Data
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Pacific Ocean
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Phylogeny*
Associated data
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GENBANK/AY659874
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