Abstract
Distribution, variation and impact factors of biomass of bacterioplankton from April to May 1999 in Bohai Sea were studied in DAPI method with epifluorescence microscopy. The biomass in surface waters showed a small day-night variation, varying from 0.13 to 2.51 μg/dm3 with an average of 0.84 μg/dm3. The biomass in bottom waters showed, however, a large variation, changing from 0.15 to 4.18 μg/dm3 with an average of 1.36 μg/dm3. The peak values occurred at 5 and 11 a.m. The bottom water biomass showed a significant correlation with particulate organic carbon (r=0.639,P<0.05). Heterotrophic bacterioplankton biomass was high in nearshore waters and low in offshore areas with a high biomass zone around Huanghe (Yellow) River mouth, showing the same distribution of nutrients. In vertical distribution, heterotrophic bacteria biomass in bottom waters was higher than that in surface water.
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This research was conducted as a component of the project “Watersheds Nutrient Loss and Eutrophication of Jiaozhou Bay” funded by National Natural Science foundation of China under Grant 40036010.
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Jie, B., Kuiran, L., Jing, Z. et al. Distribution of biomass of heterotrophic bacterioplankton in the Bohai Sea. Chin. J. Ocean. Limnol. 23, 427–432 (2005). https://doi.org/10.1007/BF02842687
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DOI: https://doi.org/10.1007/BF02842687