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Molecular assessment of Ulva (Ulvales, Chlorophyta) diversity in Vietnam including the new species U. vietnamensis
Tran, L.-A.T.; Leliaert, F.; Vieira, C.; Tran, T.V.; Nguyen, T.V.; Dam, T.D.; De Clerck, O. (2023). Molecular assessment of Ulva (Ulvales, Chlorophyta) diversity in Vietnam including the new species U. vietnamensis. Phycol. Res. 71(1): 13-24. https://dx.doi.org/10.1111/pre.12507
In: Phycological Research. Blackwell: Carlton, Vic.. ISSN 1322-0829; e-ISSN 1440-1835
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| Trefwoorden |
Ulva Linnaeus, 1753 [WoRMS]; Ulva vietnamensis L.-A.T.Tran, Leliaert & De Clerck, 2022 [WoRMS]; Ulvaceae J.V. Lamouroux ex Dumortier, 1822 [WoRMS]; Ulvophyceae [WoRMS]
Marien/Kust |
| Author keywords |
genetic diversity; ITS; molecular phylogeny; rbcL; species delimitation; taxonomy; tufA; Ulvaceae; Ulvophyceae; Vietnam |
| Auteurs | | Top |
- Tran, L.-A.T.
- Leliaert, F.
- Vieira, C.
- Tran, T.V.
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- Nguyen, T.V.
- Dam, T.D.
- De Clerck, O.
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| Abstract |
Species diversity of Ulva in Vietnam was investigated using three commonly used genetic markers, the nuclear encoded rDNA ITS region and the plastid encoded rbcL and tufA genes. Single locus species delimitation methods, complemented with morphological and ecological information resulted in the delimitation of 19 species. This diversity is largely incongruent with the traditional understanding of Ulva diversity in Vietnam. Only four species identified in this study, U. lactuca, U. reticulata, U. spinulosa, and U. flexuosa, have been previously reported, and seven species, U. ohnoi, U. tepida, U. chaugulii, U. kraftiorum, U. meridionalis, U. limnetica, and U. aragoënsis, are recorded for the first time from Vietnam. Seven genetic clusters could not be associated with species names with certainty. A new species, U. vietnamensis, is described from marine to brackish coastal areas from southern Vietnam based on its morphological and molecular distinctiveness from the currently known Ulva species. A comparison with recent molecular-based studies of Ulva diversity showed that species composition in Vietnam is similar to that of adjacent countries, including Japan, China, as well as Australia. Our study emphasizes the importance of molecular data in the assessment of Ulva diversity, and indicates that a lot of diversity may still remain to be discovered, especially in tropical regions. |
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