Publications des scientifiques de l'IRD

Mattio Lydiane, Payri Claude. (2009). Taxonomic revision of Sargassum species (fucales, phaeophyceae) from New Caledonia based on morphological and molecular analyses. Journal of Phycology, 45 (6), p. 1374-1388. ISSN 0022-3646.

Titre du document
Taxonomic revision of Sargassum species (fucales, phaeophyceae) from New Caledonia based on morphological and molecular analyses
Année de publication
2009
Type de document
Article référencé dans le Web of Science WOS:000272837600017
Auteurs
Mattio Lydiane, Payri Claude
Source
Journal of Phycology, 2009, 45 (6), p. 1374-1388 ISSN 0022-3646
Sargassum C. Agardh (1820) is a taxonomically difficult genus distributed worldwide and reported as the most species-rich genus of the Fucales. It is especially abundant in the Pacific where decreasing species richness is reported to occur from west to east. New Caledonia has been recognized as one of the hotspots of Sargassum diversity; however, species lists available for this region are old and incomplete and have not yet been updated with regard to the latest taxonomic revisions published. This study aimed at revising Sargassum diversity in New Caledonia and to assess its geographic affinities with neighboring Pacific regions. We used combined morphological and DNA analyses on new collections and examined numerous type specimens. Although 45 taxa have been listed in the literature, most of them have been either transferred to synonymy since or misidentified, and in this study, only 12 taxa were recognized as occurring in New Caledonia. They belong to the subgenus Sargassum sect. Binderianae (Grunow) Mattio et Payri (2), sect. Ilicifoliae (J. Agardh) Mattio et Payri (2), sect. Polycystae Mattio et Payri. (1), sect. Sargassum (4), sect. Zygocarpicae (J. Agardh) Setch. (2), and subgenus Phyllotrichia (Aresh.) J. Agardh (1). New Caledonian Sargassum flora appeared as the second richest in the region after the Pacific coast of Australia, with which it has shown high similarity, and shared species with all neighboring regions. One species, S. turbinarioides Grunow, is considered as endemic to New Caledonia. The low genetic diversity detected among several polymorphic species belonging to sect. Sargassum is also discussed.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
Localisation
Fonds IRD [F B010049173]
Identifiant IRD
fdi:010049173
Contact