Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu Lake
Long-term variations of phytoplankton chlorophyll-a (Chl-a), nutrients, and suspended solids (SS) in Taihu Lake, a large shallow freshwater lake in China, during algal bloom seasons from May to August were analyzed using the monthly investigated data from 1999 to 2007. The effective accumulated wate...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2012-12-01
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| Series: | Water Science and Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674237015302106 |
| _version_ | 1818913869636042752 |
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| author | Lin-lin Cai Guang-wei Zhu Meng-yuan Zhu Hai Xu Bo-qiang Qin |
| author_facet | Lin-lin Cai Guang-wei Zhu Meng-yuan Zhu Hai Xu Bo-qiang Qin |
| author_sort | Lin-lin Cai |
| collection | DOAJ |
| description | Long-term variations of phytoplankton chlorophyll-a (Chl-a), nutrients, and suspended solids (SS) in Taihu Lake, a large shallow freshwater lake in China, during algal bloom seasons from May to August were analyzed using the monthly investigated data from 1999 to 2007. The effective accumulated water temperature (EAWT) in months from March to June was calculated with daily monitoring data from the Taihu Laboratory for Lake Ecosystem Research (TLLER). The concentrations of Chl-a and nutrients significantly decreased from Meiliang Bay to Central Lake. Annual averages of the total nitrogen (TN), total phosphorus (TP), and Chl-a concentrations, and EAWT generally increased in the nine years. In Meiliang Bay, the concentration of Chl-a was significantly correlated with EAWT, ammonia nitrogen (NH4+-N), TN, the soluble reactive phosphorus (SRP), TP, and SS. In Central Lake, however, the concentration of Chl-a was only correlated with EAWT, TP, and SS. Multiple stepwise linear regression revealed that EAWT, dissolved total phosphorus (DTP), and TP explained 99.2% of the variation of Chl-a in Meiliang Bay, and that EAWT, NH4+-N , and TP explained 98.7% of the variation of Chl-a in Central Lake. Thus EAWT is an important factor influencing the annual change of phytoplankton biomass. Extreme climate change, such as extremely hot springs or cold springs, could cause very different bloom intensities in different years. It is also suggested that both nutrients and EAWT played important roles in the growth of phytoplankton in Taihu Lake. The climate factors and nutrients dually controlled the risk of harmful algal blooms in Taihu Lake. Cutting down phosphorus and nitrogen loadings from catchments should be a fundamental strategy to reduce the risk of blooms in Taihu Lake. |
| first_indexed | 2024-12-19T23:37:21Z |
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| institution | Directory Open Access Journal |
| issn | 1674-2370 |
| language | English |
| last_indexed | 2024-12-19T23:37:21Z |
| publishDate | 2012-12-01 |
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| series | Water Science and Engineering |
| spelling | doaj.art-e3369ad3217e45239979d12e8129b89b2022-12-21T20:01:34ZengElsevierWater Science and Engineering1674-23702012-12-015436137410.3882/j.issn.1674-2370.2012.04.001Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu LakeLin-lin Cai0Guang-wei Zhu1Meng-yuan Zhu2Hai Xu3Bo-qiang Qin4State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. ChinaState Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. ChinaLong-term variations of phytoplankton chlorophyll-a (Chl-a), nutrients, and suspended solids (SS) in Taihu Lake, a large shallow freshwater lake in China, during algal bloom seasons from May to August were analyzed using the monthly investigated data from 1999 to 2007. The effective accumulated water temperature (EAWT) in months from March to June was calculated with daily monitoring data from the Taihu Laboratory for Lake Ecosystem Research (TLLER). The concentrations of Chl-a and nutrients significantly decreased from Meiliang Bay to Central Lake. Annual averages of the total nitrogen (TN), total phosphorus (TP), and Chl-a concentrations, and EAWT generally increased in the nine years. In Meiliang Bay, the concentration of Chl-a was significantly correlated with EAWT, ammonia nitrogen (NH4+-N), TN, the soluble reactive phosphorus (SRP), TP, and SS. In Central Lake, however, the concentration of Chl-a was only correlated with EAWT, TP, and SS. Multiple stepwise linear regression revealed that EAWT, dissolved total phosphorus (DTP), and TP explained 99.2% of the variation of Chl-a in Meiliang Bay, and that EAWT, NH4+-N , and TP explained 98.7% of the variation of Chl-a in Central Lake. Thus EAWT is an important factor influencing the annual change of phytoplankton biomass. Extreme climate change, such as extremely hot springs or cold springs, could cause very different bloom intensities in different years. It is also suggested that both nutrients and EAWT played important roles in the growth of phytoplankton in Taihu Lake. The climate factors and nutrients dually controlled the risk of harmful algal blooms in Taihu Lake. Cutting down phosphorus and nitrogen loadings from catchments should be a fundamental strategy to reduce the risk of blooms in Taihu Lake.http://www.sciencedirect.com/science/article/pii/S1674237015302106Taihu LakeMicrocystis bloomwater temperaturenutrientsclimate change |
| spellingShingle | Lin-lin Cai Guang-wei Zhu Meng-yuan Zhu Hai Xu Bo-qiang Qin Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu Lake Water Science and Engineering Taihu Lake Microcystis bloom water temperature nutrients climate change |
| title | Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu Lake |
| title_full | Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu Lake |
| title_fullStr | Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu Lake |
| title_full_unstemmed | Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu Lake |
| title_short | Effects of temperature and nutrients on phytoplankton biomass during bloom seasons in Taihu Lake |
| title_sort | effects of temperature and nutrients on phytoplankton biomass during bloom seasons in taihu lake |
| topic | Taihu Lake Microcystis bloom water temperature nutrients climate change |
| url | http://www.sciencedirect.com/science/article/pii/S1674237015302106 |
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