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| Comparative analysis of plankton community between the coastal and mountain reservoirs in Guangdong Province |
| Chen Lifen, Hu Ren, Lin Qiuqi, liu Ningning, Han Boping |
| Institute of Hydrobiology, Jinan University, Guangzhou 510632 |
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Abstract Two coastal reservoirs (Chisha reservoir and Dashuiqiao reservoir) and one mountain reservoir (Chishijing reservoir) in Guangdong Province were sampled in flood and dry reasons of 2000 and their plankton communities were analyzed. The composition and abundance of plankton are different in the reservoirs. The main causing factors are nutrient input and temperature. The measurements show that N/P ratios in the three reservoirs were higher than 15, phytoplankton growth was limited by phosphorus concentration. In flood season, thermal stratification was not found in coastal reservoirs, but it was obvious in the mountain reservoir. More psychrophilic plankton appeared in Chishijing reservoir, such as Ochmmonas mutabilis, Daphnia hyalina. The cell abundance of Pyrrophyta in summer is higher than in winter. Thermophilic plankton more frequently presented in the coastal reservoirs, for examples, Euglena viridis, Phacus sp. Cryptomonas sp. Psammophilocyclops so. was only found in warm areas of Dashuiqiao reservoir.
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Received: 25 February 2002
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