Tracking dispersal routes:phylogeography of the arctic antarctic disjunct seaweed acrosiphonia-arcta (chlorophyta)

Phylogenetic relationships in the Arctic-Antarctic disjunct seaweed species Acrosiphonia arcta (Dillwyn) J. G. Agardh (Acrosiphoniales, Chlorophyta) were examined using restriction fragment-length polymorphism analysis of the fast-evolving nuclear ribosomal intergenic spacer (IGS) region and random...

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Bibliographic Details
Published in:Journal of Phycology
Main Authors: van Oppen, MJH, Diekmann, OE, WIENCKE, C, Stam, WT, Olsen, JL
Format: Article in Journal/Newspaper
Language:English
Published: 1994
Subjects:
ACROSIPHONIA-ARCTA
BIOGEOGRAPHY
CHLOROPHYTA
RAPD
RDNA IGS
RFLP
RIBOSOMAL DNA SPACER
AMPLIFIED POLYMORPHIC DNA
ARBITRARY PRIMERS
INTERGENIC SPACER
RNA GENES
TEMPERATURE
POPULATION
PACIFIC
MARKERS
Antarctic
Antarctic Peninsula
Arctic
Greenland
Pacific
The Antarctic
Antarc*
North Atlantic
Online Access:https://hdl.handle.net/11370/32674109-1da5-4580-90ad-cc285d864e08
https://research.rug.nl/en/publications/32674109-1da5-4580-90ad-cc285d864e08
https://doi.org/10.1111/j.0022-3646.1994.00067.x
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Summary:Phylogenetic relationships in the Arctic-Antarctic disjunct seaweed species Acrosiphonia arcta (Dillwyn) J. G. Agardh (Acrosiphoniales, Chlorophyta) were examined using restriction fragment-length polymorphism analysis of the fast-evolving nuclear ribosomal intergenic spacer (IGS) region and random amplified polymorphic DNA (RAPD) markers. Twenty-two isolates collected from 10 different locations in both hemispheres were compared. Five IGS length classes were identified among the 10 locations. Throughout the North Atlantic, IGS regions were found to be extremely homogeneous whereas RAPD patterns revealed subdivided populations that suggest founder effects. Acrosiphonia arcta populations found in the Arctic and North Atlantic oceans are hypothesized to be of Pacific origin. Extensive differences found between Arctic Greenland populations and those in the North Atlantic suggest that colonization of Arctic Greenland occurred as an independent event. Recolonization of the Antarctic peninsula from Southern Chile is favored, whereas the directionality of transequatorial passage along the western coast of the Americas could be in either direction.

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