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Species delimitation, taxonomy and biogeography of dictyota in Europe (Dictyotales, Phaeophyceae)

Ana Tronholm, Frederique Steen UGent, Lennert Tyberghein UGent, Frédérik Leliaert UGent, Heroen Verbruggen UGent, Antonia Siguan-Ribera and Olivier De Clerck UGent (2010) JOURNAL OF PHYCOLOGY. 46(6). p.1301-1321
abstract
Taxonomy of the brown algal genus Dictyota has a long and troubled history. Our inability to distinguish morphological plasticity from fixed diagnostic traits that separate the various species has severely confounded species delineation. From continental Europe, more than 60 species and intraspecific taxa have been described over the last two centuries. Using a molecular approach, we addressed the diversity of the genus in European waters and made necessary taxonomic changes. A densely sampled DNA data set demonstrated the presence of six evolutionarily significant units (ESUs): Dictyota dichotoma (Huds.) J. V. Lamour., D. fasciola (Roth) J. V. Lamour., D. implexa J. V. Lamour., D. mediterranea (Schiffn.) G. Furnari, D. spiralis Mont., and the newly described D. cyanoloma sp. nov., which was previously reported as D. ciliolata from the Mediterranean Sea. Species distributions, based on DNA-confirmed occurrence records, indicate that all species are geographically confined to the NE Atlantic Ocean with the exception of D. dichotoma and D. implexa, which also occur in South Africa and Bermuda, respectively. To investigate potential hybridization between D. dichotoma and D. implexa, which were previously shown to be sexually compatible in culture, we compiled and analyzed sets of mitochondrial, plastid, and nuclear markers to detect putative hybrids or introgression in natural populations. Failure to detect natural hybrids indicates that effective pre- and postzygotic isolation mechanisms are at play in natural populations and supports the by-product hypothesis of reproductive isolation.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
DICHOTOMA, RHODOPHYTA, biogeography, Dictyota, Dictyotales, diversity, molecular phylogenetics, taxonomy, DNA, CHEMICAL DEFENSE, ARTIFICIAL HYBRIDS, PHYLOGENETIC INFERENCE, NORTH-ATLANTIC, FUCUS-EVANESCENS, MEDITERRANEAN SEA, BENTHIC MARINE-ALGAE
journal title
JOURNAL OF PHYCOLOGY
J. Phycol.
volume
46
issue
6
pages
1301 - 1321
Web of Science type
Article
Web of Science id
000284854100025
JCR category
MARINE & FRESHWATER BIOLOGY
JCR impact factor
2.239 (2010)
JCR rank
16/92 (2010)
JCR quartile
1 (2010)
ISSN
0022-3646
DOI
10.1111/j.1529-8817.2010.00908.x
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1246502
handle
http://hdl.handle.net/1854/LU-1246502
date created
2011-05-29 20:14:09
date last changed
2016-12-19 15:44:47
@article{1246502,
  abstract     = {Taxonomy of the brown algal genus Dictyota has a long and troubled history. Our inability to distinguish morphological plasticity from fixed diagnostic traits that separate the various species has severely confounded species delineation. From continental Europe, more than 60 species and intraspecific taxa have been described over the last two centuries. Using a molecular approach, we addressed the diversity of the genus in European waters and made necessary taxonomic changes. A densely sampled DNA data set demonstrated the presence of six evolutionarily significant units (ESUs): Dictyota dichotoma (Huds.) J. V. Lamour., D. fasciola (Roth) J. V. Lamour., D. implexa J. V. Lamour., D. mediterranea (Schiffn.) G. Furnari, D. spiralis Mont., and the newly described D. cyanoloma sp. nov., which was previously reported as D. ciliolata from the Mediterranean Sea. Species distributions, based on DNA-confirmed occurrence records, indicate that all species are geographically confined to the NE Atlantic Ocean with the exception of D. dichotoma and D. implexa, which also occur in South Africa and Bermuda, respectively. To investigate potential hybridization between D. dichotoma and D. implexa, which were previously shown to be sexually compatible in culture, we compiled and analyzed sets of mitochondrial, plastid, and nuclear markers to detect putative hybrids or introgression in natural populations. Failure to detect natural hybrids indicates that effective pre- and postzygotic isolation mechanisms are at play in natural populations and supports the by-product hypothesis of reproductive isolation.},
  author       = {Tronholm, Ana and Steen, Frederique and Tyberghein, Lennert and Leliaert, Fr{\'e}d{\'e}rik and Verbruggen, Heroen and Siguan-Ribera, Antonia and De Clerck, Olivier},
  issn         = {0022-3646},
  journal      = {JOURNAL OF PHYCOLOGY},
  keyword      = {DICHOTOMA,RHODOPHYTA,biogeography,Dictyota,Dictyotales,diversity,molecular phylogenetics,taxonomy,DNA,CHEMICAL DEFENSE,ARTIFICIAL HYBRIDS,PHYLOGENETIC INFERENCE,NORTH-ATLANTIC,FUCUS-EVANESCENS,MEDITERRANEAN SEA,BENTHIC MARINE-ALGAE},
  language     = {eng},
  number       = {6},
  pages        = {1301--1321},
  title        = {Species delimitation, taxonomy and biogeography of dictyota in Europe (Dictyotales, Phaeophyceae)},
  url          = {http://dx.doi.org/10.1111/j.1529-8817.2010.00908.x},
  volume       = {46},
  year         = {2010},
}

Chicago
Tronholm, Ana, Frederique Steen, Lennert Tyberghein, Frédérik Leliaert, Heroen Verbruggen, Antonia Siguan-Ribera, and Olivier De Clerck. 2010. “Species Delimitation, Taxonomy and Biogeography of Dictyota in Europe (Dictyotales, Phaeophyceae).” Journal of Phycology 46 (6): 1301–1321.
APA
Tronholm, A., Steen, F., Tyberghein, L., Leliaert, F., Verbruggen, H., Siguan-Ribera, A., & De Clerck, O. (2010). Species delimitation, taxonomy and biogeography of dictyota in Europe (Dictyotales, Phaeophyceae). JOURNAL OF PHYCOLOGY, 46(6), 1301–1321.
Vancouver
1.
Tronholm A, Steen F, Tyberghein L, Leliaert F, Verbruggen H, Siguan-Ribera A, et al. Species delimitation, taxonomy and biogeography of dictyota in Europe (Dictyotales, Phaeophyceae). JOURNAL OF PHYCOLOGY. 2010;46(6):1301–21.
MLA
Tronholm, Ana, Frederique Steen, Lennert Tyberghein, et al. “Species Delimitation, Taxonomy and Biogeography of Dictyota in Europe (Dictyotales, Phaeophyceae).” JOURNAL OF PHYCOLOGY 46.6 (2010): 1301–1321. Print.