期刊文献+

Effect of phosphorus fluctuation caused by river water dilution in eutrophic lake on competition between blue-green alga Microcystis aeruginosa and diatom Cyclotella sp. 被引量:16

Effect of phosphorus fluctuation caused by river water dilution in eutrophic lake on competition between blue-green alga Microcystis aeruginosa and diatom Cyclotella sp.
原文传递
导出
摘要 Tega-numa (Lake Tega) is one of the eutrophic lakes in Japan. For the improvement of water quality in Lake Tega, the North- chiba Water Conveyance Channel was constructed in 2000, which transfer water from Tone River into the lake. After 2000, the dominant species of diatoms, mainly Cyclotella sp., have been replacing blue-green algae, mainly Microcystis aeruginosa in Lake Tega. This transition of dominant species would be due to the dilution, but the detail mechanism has not been understood yet. This study examined the relationship between phosphorus fluctuation caused by river water dilution to Lake Tega and dominance of algal species, M. aeruginosa or Cyclotella sp. based on the single-species and the mixed-species culture experiments. The single-species culture experiment showed that the half-saturation constant and uptake rate of phosphorus were one order lower and seven times higher for M. aeruginosa than those for Cyclotella sp. These findings implied that M. aeruginosa would possess a potential for the growth and survival over Cyclotella sp. in the phosphorus limited condition. The superiority of M. aeruginosa was reflected in the outcome of the mixed-species culture experiment, i.e., dominance of M. aeruginosa, even phosphorus concentration was lowered to 0.01 mg-P/L. Therefore, it could be concluded that the decrease in phosphorus concentration due to the river water dilution to Lake Tega would be interpreted as a minor factor for the transition of dominant species from M. aeruginosa to Cyclotella sp. Tega-numa (Lake Tega) is one of the eutrophic lakes in Japan. For the improvement of water quality in Lake Tega, the North- chiba Water Conveyance Channel was constructed in 2000, which transfer water from Tone River into the lake. After 2000, the dominant species of diatoms, mainly Cyclotella sp., have been replacing blue-green algae, mainly Microcystis aeruginosa in Lake Tega. This transition of dominant species would be due to the dilution, but the detail mechanism has not been understood yet. This study examined the relationship between phosphorus fluctuation caused by river water dilution to Lake Tega and dominance of algal species, M. aeruginosa or Cyclotella sp. based on the single-species and the mixed-species culture experiments. The single-species culture experiment showed that the half-saturation constant and uptake rate of phosphorus were one order lower and seven times higher for M. aeruginosa than those for Cyclotella sp. These findings implied that M. aeruginosa would possess a potential for the growth and survival over Cyclotella sp. in the phosphorus limited condition. The superiority of M. aeruginosa was reflected in the outcome of the mixed-species culture experiment, i.e., dominance of M. aeruginosa, even phosphorus concentration was lowered to 0.01 mg-P/L. Therefore, it could be concluded that the decrease in phosphorus concentration due to the river water dilution to Lake Tega would be interpreted as a minor factor for the transition of dominant species from M. aeruginosa to Cyclotella sp.
出处 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2010年第11期1666-1673,共8页 环境科学学报(英文版)
关键词 eutrophic lake water quality improvement water blooms Microcystis aeruginosa Cyclotella sp. eutrophic lake water quality improvement water blooms Microcystis aeruginosa Cyclotella sp.
  • 相关文献

参考文献30

  • 1Amano Y, Taki K, Murakami K, Ishii T, Matsushima H, 2002. Sediment remediafion for ecosystem in eutrophic lakes. The Scientific World Journal, 2: 885-891.
  • 2Amano Y, Machida M, Tatsumoto H, George D, Berk S, Taki K, 2008. Prediction of Microcystis blooms based on TN:TP ratio and lake origin. The Scientific World Journal, 8: 558- 572.
  • 3Brandrud T E, 2002. Effects of liming on aquatic macrophytes, with emphasis on Scandinavia. Aquatic Botany, 73(4): 395- 404.
  • 4Clark J W, Viessman W Jr, Hammer M J, 1971. Water Supply and Pollution Control (2nd ed.). International Textbook Company, Press Scranton, PA, USA.
  • 5Clesceri L S, Greenberg A E, Trussell R R, 1989. Standard Methods for the Examination of Water and Wastewater. American Public Health Association, Washington DC.
  • 6Chiba Prefectural Government, 2009. Water quality for lakes in Chiba prefecture, http://www. pref.chiba.j p/syozoku/e_ suiho/3 _kansi/3Aake.html (accessed December 26, 2009).
  • 7Egge J K, 1998. Are diatoms poor competitors at low phosphate concentrations? Journal of Marine Systems, 16(3-4): 191- 198.
  • 8Egge J K, Aksnes D L, 1992. Silicate as regulating nutrient in phytoplankton competition. Marine Ecology Progress Series, 83: 281-289.
  • 9Gelin C, Ripl W, 1978. Nutrient decrease and response of various phytoplankton size fractions following the restoration of Lake Trummen, Sweden. Archivfiir Hydrobiologie, 81(3): 339-367.
  • 10Guillard R R L, Lorenzen C J, 1974. Yellow-green algae with chlorophyllide c. Journal of Phycology, 8(1): 10-14.

同被引文献248

引证文献16

二级引证文献82

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部