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Table 1

Percentage of phytoplankton taxa that accounted for at least 1% of the average biomass based on four samplings events and contribution to differences in the community structure at spatial river system) and seasonal scales in the rivers of Lake Taihu Basin.

Species Percentage Contribution (%)

Spatial Seasonal
Cyanobacteria Spirulina princeps 5.01 2.67 2.70
Anabaena circinalis 3.39 1.85 1.89
Planktothrix sp. 3.25 1.96 1.98
Microcystis aeruginosa 2.15 1.22 1.20
M. flos-aquae 1.73 1.07 1.02
Bacillariophyta Coscinodiscus sp. 6.32 4.45 4.77
Surirella sp. 3.93 5.03 4.81
Aulacoseira sulcata 3.67 4.43 4.49
A. varians 3.63 5.00 4.90
A. granulata 3.07 3.65 3.76
Cyclotella sp. 2.47 1.91 1.93
Pinnularia sp. 2.00 2.83 2.89
Synedra acus 1.86 1.91 1.85
Navicula sp. 1.30 1.84 1.78
Actinocyclus ehrenbergii 1.08 1.26 1.25
Cryptophyta Cryptomonas erosa 2.23 2.51 2.56
Dinophyta Gymnodinium aeruginosum 3.20 2.95 3.15
Peridinium sp. 1.51 2.35 2.36
Phacus sp. 3.35 3.60 3.56
Euglenophyta Euglena oxyuris 2.97 3.23 3.23
E. polymorpha 1.40 1.88 1.84
E. sp. 1.76 1.76 1.69
Phacus longicauda 2.44 1.97 1.95
Chlorophyta Eudorina elegans 4.23 3.86 3.43
Pediastrum duplex 2.58 2.03 2.07
P. simplex 1.21 0.88 0.85
Pandorina morum 1.73 1.25 1.23
Oocystis sp. 1.16 0.73 0.77
Coelastrum microporum 1.05 0.79 0.79
Total 75.70 70.86 71.19