Contribution of benthic microalgae to the whole water algal biomass and primary production in Suo Nada,the Seto Inland Sea,Japan |
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| Authors: | Md Jahangir Sarker Tamiji Yamamoto Toshiya Hashimoto |
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| Institution: | (1) Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan;(2) Present address: Center for Environment and Water (CEW), King Fahd University of Petroleum and Minerals, P.O. Box 1804, Dhahran, 31261, Saudi Arabia |
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| Abstract: | Biomass and primary productivity of benthic microalgae (BMA) and planktonic algae in Suo Nada, the western part of the Seto
Inland Sea, Japan were compared in terms of unit area with regard to their seasonal and spatial distribution in 2002. Judging
from light compensation depth and water depth, the southwestern part of Suo Nada was considered to be a potential habitat
for BMA. Whereas the contribution of sedimented planktonic algae was high in biomass at the sediment surface, BMA was obviously
significant both in biomass and primary production in the shallow southwestern part. However, the contribution of BMA to the
total biomass in the entire water column was 7% in winter and 2% in summer. The primary production of BMA varied between 4.0
and 74.0 mg C m−2 d−1 in the southwestern part, accounting for 2–12% of the whole water column primary production. The ecological roles of BMA
in the Suo Nada ecosystem are discussed, such as reduction of benthic nutrient flux, oxidation of surface sediments and feed
for higher animals. |
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| Keywords: | Benthic microalgae planktonic algae biomass primary production Suo Nada |
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