| 引用本文: | W. N. Vant,Y. Z. Hua,Y. C. Jiang,G. B. McBride,D. S. Roper,Q. Wang.太湖1989—1993年富营养化资料的分析.湖泊科学,1998,10(s1):143-154. DOI:10.18307/1998.sup18 |
| W. N. Vant,Y. Z. Hua,Y. C. Jiang,G. B. McBride,D. S. Roper,Q. Wang.Analysis of Lake Taihu Eutrophication Data, 1989-1993. J. Lake Sci.1998,10(s1):143-154. DOI:10.18307/1998.sup18 |
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| 太湖1989—1993年富营养化资料的分析 |
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W. N. Vant1, Y. Z. Hua2, Y. C. Jiang2, G. B. McBride1, D. S. Roper1, Q. Wang2
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1.National Institute of Water and Atmospheric Research, P. O. Box;2.Wuxi Environmental Protection Bureau and Wuxi Central Monitoring Station for Lake Taihu, Wuxi, Jiangsu, China
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| 摘要: |
| The water quality of Lake Taihu has declined markedly in the past two or three decades. We used modern non-parametric statistical methods to analyse the water quality record for 1989-1993 (samples collected at 2-monthly intervals). Phytoplankton blooms have been a particular problem, as the very high peak chlorophyll a concentrations in the Meiliang (up to 0.4 g·m-3) and the coastal regions (up to 0.5 g·m-3) indicate. However, over a large area of the middle of the lake, peak chlorophyll a concentrations were much lower (0.01-0.03 g·m-3). In this deeper, turbid part of the lake there may often be insufficient underwater light to support rapid phytoplankton growth; grazing by the abundant benthic bivalves may also be important. Total phosphorus (P) concentrations in the coastal waters increased significantly (p < 5%). Suspended solids concentrations also increased significantly, and as a result transparency decreased. However, phytoplankton probably usually only account for a small proportion of the suspended material, so the parallel increase in total P and suspended solids may be coincidental. Significant increases in chlorophyll a were not observed, but phytoplankton blooms are often short-lived (e.g. days to weeks), and thus may not always be detected by the 2-monthly sampling. |
| 关键词: eutrophication phytoplankton nutrients Taihu Lake |
| DOI：10.18307/1998.sup18 |
| 分类号: |
| 基金项目: |
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| Analysis of Lake Taihu Eutrophication Data, 1989-1993 |
|
W. N. Vant1, Y. Z. Hua2, Y. C. Jiang2, G. B. McBride1, D. S. Roper1, Q. Wang2
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1.National Institute of Water and Atmospheric Research, P. O. Box;2.Wuxi Environmental Protection Bureau and Wuxi Central Monitoring Station for Lake Taihu, Wuxi, Jiangsu, China
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| Abstract: |
| The water quality of Lake Taihu has declined markedly in the past two or three decades. We used modern non-parametric statistical methods to analyse the water quality record for 1989-1993 (samples collected at 2-monthly intervals). Phytoplankton blooms have been a particular problem, as the very high peak chlorophyll a concentrations in the Meiliang (up to 0.4 g·m-3) and the coastal regions (up to 0.5 g·m-3) indicate. However, over a large area of the middle of the lake, peak chlorophyll a concentrations were much lower (0.01-0.03 g·m-3). In this deeper, turbid part of the lake there may often be insufficient underwater light to support rapid phytoplankton growth; grazing by the abundant benthic bivalves may also be important. Total phosphorus (P) concentrations in the coastal waters increased significantly (p < 5%). Suspended solids concentrations also increased significantly, and as a result transparency decreased. However, phytoplankton probably usually only account for a small proportion of the suspended material, so the parallel increase in total P and suspended solids may be coincidental. Significant increases in chlorophyll a were not observed, but phytoplankton blooms are often short-lived (e.g. days to weeks), and thus may not always be detected by the 2-monthly sampling. |
| Key words: eutrophication phytoplankton nutrients Taihu Lake |
