Abstract
Samples of the freshwater red algae, Bangiadulcis atropurpurea, collected from the mountain waterfalls and its close species, Bangia fuscopurpurea, collected from coasts, were phylogenetically analyzed. The sequences of the rbcL gene and RuBisCO spacer region of the freshwater Bangiadulcis atropurpurea species were identical or similar to those of B. atropurpurea from Japan, North America and Europe. This result indicated that the freshwater Bangiadulcis species from Taiwan shared a common ancestor with the three above-mentioned populations and formed a distinct clade from the marine Bangia species in the phylogenetic trees. It is suggested that all the previous records on marine Bangia species should be revised and the name B. fuscopurpurea be used for the marine species in Taiwan. In this study, the freshwater alga B. atropurpurea presents a new record in the algal flora of Taiwan. This finding is important for the protection of the biodiversity of red algal flora, and provides useful information on the ecological conservation of the species in Taiwan.
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