Abstract
The composition, biomass, and photosynthetic activity of benthic algal communities were investigated in a littoral zone of the south basin of Lake Baikal in July 1998. A transect survey revealed a vertical transition of the dominant taxonomic groups: Ulothrix and diatoms dominated in the shallowest station (depth, 0.5 m), whereas only diatoms were found in a station with a depth of 1 m. In deeper stations (depth, 2–3 m), an endemic filamentous green alga, Draparnaldioides baicalensis, was the predominant form, but in addition to this species, Tetraspora and diatoms were also abundant in algal communities collected in the deepest stations (depth, 5–6 m). Biomass expressed as chlorophyll a (Chl a) varied in the range of 8 mg Chl a · m−2 (at a depth of 1 m) and 300 mg Chl a · m−2 (at a depth of 3 m). The maximum photosynthetic rate (of carbon, C) of the community dominated by Ulothrix was 0.24 mg C · mg Chl a −1 · h−1, whereas the corresponding rate of the community dominated by Draparnaldioides was 1.51 mg C · mg Chl a −1 · h−1.
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Received: January 11, 2002 / Accepted: June 11, 2002
Present address: School of Human Sciences, Sugiyama Jogakuen University, 37-234 Takenoyama, Iwasaki-cho, Nisshin, Aichi 470-0131, Japan Tel. +81-5617-4-1186; Fax +81-5617-3-4443 e-mail: ken@hs.sugiyama-u.ac.jp
Acknowledgments We are grateful to Drs. N.A. Bondarenko, L.R. Izmest'eva, O.A. Timoshkin, V.A. Ostroumov, and A. Tuji for valuable information on this study. Professor T. Nagata and two anonymous reviewers provided valuable comments on the manuscript. This study was partly supported by a grant-in-aid for scientific research (no. 10308025) from the Ministry of Education, Science, Sports, and Culture of Japan. K. Nozaki is a research fellow of the Japan Society for the Promotion of Science.
Correspondence to:K. Nozaki
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Nozaki, K., Morino, H., Munehara, H. et al. Composition, biomass, and photosynthetic activity of the benthic algal communities in a littoral zone of Lake Baikal in summer. Limnology 3, 0175–0180 (2002). https://doi.org/10.1007/s102010200021
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DOI: https://doi.org/10.1007/s102010200021