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Evolution and species boundaries of the Portieria-complex (Rhodophyta: Gigartinales)

Dioli Ann Payo, Frédérik Leliaert UGent, Heroen Verbruggen UGent, H Calumpong and Olivier De Clerck UGent (2009) Phycologia.
abstract
Portieria hornemannii is a common and widespread Indo-Pacific red seaweed. Our studies suggest, however, that P. hornemannii does not represent a single species. Extremely high levels of diversity, based on mitochondrial (cox1, cox2-3 spacer) and chloroplast (rbcL, rbcL-S spacer) markers, are encountered among isolates spanning the entire geographical range of the ‘species’. Model based species delineation based on lineage through time plots reveal at least 27 species. These results are corroborated by assessments of DNA barcoding gaps. In the Philippines these individual lineages possess a near exclusive distribution pattern in the Central Visayas region, with most species restricted to one or a few localities. These observations are in stark contrast with the diversity pattern observed in the northern Batanes Islands, where a high sympatric diversity is encountered. Given the high diversity encountered at small geographical scales, we used low-copy nuclear genes (EF2 and Actin) to assess for reproductive isolation among the various lineages encountered in the Philippines. Gene trees of nuclear markers are in full concordance with the phylogenies based on organelle genes, suggesting complete reproductive isolation under natural conditions. Current efforts are dedicated at understanding the causes of this unexpected diversification, which apparently has not been accompanied by significant morphological differentiation. Ecological modes of speciation driven by herbivore interactions are investigated. The algae in question are grazed upon by Applysia sea slugs and are known to produce a wide variety of halogenated monoterpenes which act as antigrazing defense mechanisms.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (meetingAbstract)
publication status
published
subject
in
Phycologia
conference name
9th International Phycoogical Congress
conference location
Tokyo, Japan
Web of Science type
Meeting Abstract
Web of Science id
000268126900296
JCR category
PLANT SCIENCES
JCR impact factor
1.218 (2009)
JCR rank
87/172 (2009)
JCR quartile
3 (2009)
ISSN
0031-8884
language
English
UGent publication?
yes
classification
C3
id
870779
handle
http://hdl.handle.net/1854/LU-870779
date created
2010-02-19 13:31:31
date last changed
2016-12-19 15:36:13
@inproceedings{870779,
  abstract     = {Portieria hornemannii is a common and widespread Indo-Pacific red seaweed. Our studies suggest, however, that P. hornemannii does not represent a single species. Extremely high levels of diversity, based on mitochondrial (cox1, cox2-3 spacer) and chloroplast (rbcL, rbcL-S spacer) markers, are encountered among isolates spanning the entire geographical range of the {\textquoteleft}species{\textquoteright}. Model based species delineation based on lineage through time plots reveal at least 27 species. These results are corroborated by assessments of DNA barcoding gaps. In the Philippines these individual lineages possess a near exclusive distribution pattern in the Central Visayas region, with most species restricted to one or a few localities. These observations are in stark contrast with the diversity pattern observed in the northern Batanes Islands, where a high sympatric diversity is encountered. Given the high diversity encountered at small geographical scales, we used low-copy nuclear genes (EF2 and Actin) to assess for reproductive isolation among the various lineages encountered in the Philippines. Gene trees of nuclear markers are in full concordance with the phylogenies based on organelle genes, suggesting complete reproductive isolation under natural conditions. Current efforts are dedicated at understanding the causes of this unexpected diversification, which apparently has not been accompanied by significant morphological differentiation. Ecological modes of speciation driven by herbivore interactions are investigated. The algae in question are grazed upon by Applysia sea slugs and are known to produce a wide variety of halogenated monoterpenes which act as antigrazing defense mechanisms.},
  author       = {Payo, Dioli Ann and Leliaert, Fr{\'e}d{\'e}rik and Verbruggen, Heroen and Calumpong, H and De Clerck, Olivier},
  booktitle    = {Phycologia},
  issn         = {0031-8884},
  language     = {eng},
  location     = {Tokyo, Japan},
  title        = {Evolution and species boundaries of the Portieria-complex (Rhodophyta: Gigartinales)},
  year         = {2009},
}

Chicago
Payo, Dioli Ann, Frédérik Leliaert, Heroen Verbruggen, H Calumpong, and Olivier De Clerck. 2009. “Evolution and Species Boundaries of the Portieria-complex (Rhodophyta: Gigartinales).” In Phycologia.
APA
Payo, D. A., Leliaert, F., Verbruggen, H., Calumpong, H., & De Clerck, O. (2009). Evolution and species boundaries of the Portieria-complex (Rhodophyta: Gigartinales). Phycologia. Presented at the 9th International Phycoogical Congress.
Vancouver
1.
Payo DA, Leliaert F, Verbruggen H, Calumpong H, De Clerck O. Evolution and species boundaries of the Portieria-complex (Rhodophyta: Gigartinales). Phycologia. 2009.
MLA
Payo, Dioli Ann, Frédérik Leliaert, Heroen Verbruggen, et al. “Evolution and Species Boundaries of the Portieria-complex (Rhodophyta: Gigartinales).” Phycologia. 2009. Print.