The diverse species of the genus Hantzschia (Bacillariophyta) in sand flats of the Nakdong River estuary in Korea
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초록
To collect the diatom species belonging to the genus Hantzschia, bottom sediments were collected from 32 samplingsites in 23 sand-flat areas in the intertidal zone and river reaches of Nakdong River estuary, Korea. The sand sedimentscontained a total of 19 species of genus Hantzschia, Hantzschia amphioxys (Ehrenberg) Grunow, H. amphioxys f. capitataO. Müller, H. baltica Simonsen, H. distinctepunctata (Hustedt) Hustedt, H. elegantula (Østrup) Witkowski et al., H. longiareolataGarcia-Baptista, H. marina (Donkin) Grunow, H. pseudomarina Hustedt, H. virgata (Roper) Grunow, H. virgatavar. gracilis Hustedt, H. virgata var. kariana Grunow, H. virgata var. leptocephala Østrup and H. weyprechtii Grunow,including six unconfirmed species. Eleven Hantzschia species are reported as new to Korea. Hantzschia virgata, its infraspecies,and neighboring speceis showed large morphological variations within a single species or among the closelyrelated species. Hantzschia amphioxys, H. distinctepunctata, and H. virgata var. leptocephala prefer freshwater habitatsin the upper reaches of the river, while others occurred mainly in the sand flats composed of coarse sand in the intertidalarea. In the estuarine sediments, the Hantzschia taxa are classified to be typical sand-attached forms.
Abstract
To collect the diatom species belonging to the genus Hantzschia, bottom sediments were collected from 32 samplingsites in 23 sand-flat areas in the intertidal zone and river reaches of Nakdong River estuary, Korea. The sand sedimentscontained a total of 19 species of genus Hantzschia, Hantzschia amphioxys (Ehrenberg) Grunow, H. amphioxys f. capitataO. Müller, H. baltica Simonsen, H. distinctepunctata (Hustedt) Hustedt, H. elegantula (Østrup) Witkowski et al., H. longiareolataGarcia-Baptista, H. marina (Donkin) Grunow, H. pseudomarina Hustedt, H. virgata (Roper) Grunow, H. virgatavar. gracilis Hustedt, H. virgata var. kariana Grunow, H. virgata var. leptocephala Østrup and H. weyprechtii Grunow,including six unconfirmed species. Eleven Hantzschia species are reported as new to Korea. Hantzschia virgata, its infraspecies,and neighboring speceis showed large morphological variations within a single species or among the closelyrelated species. Hantzschia amphioxys, H. distinctepunctata, and H. virgata var. leptocephala prefer freshwater habitatsin the upper reaches of the river, while others occurred mainly in the sand flats composed of coarse sand in the intertidalarea. In the estuarine sediments, the Hantzschia taxa are classified to be typical sand-attached forms.
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