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Table 2

Relative growth rate (g g−1 day−1) obtained in the experiment with floating macrophytes at the different treatments of salinity and pH (mean ± standard deviation, different letters represent significant statistical differences among treatments)

TreatmentsE. crassipesP. stratiotesS. herzogii
Salinity 
 Control 0.0070 ± 0.0010 a 0.0136 ± 0.0087 a 0.0317 ± 0.0045 a 
 2,000 0.0025 ± 0.0005 a 0.0119 ± 0.0050 a 0.0301 ± 0.0075 a 
 4,000 −0.0032 ± 0.0004 b 0.0104 ± 0.0053 a 0.0292 ± 0.0050 a 
 6,000 −0.0150 ± 0.0030 c 0.0049 ± 0.0034 b 0.0281 ± 0.0044 a 
 8,000 −0.0143 ± 0.0030 c −0.0466 ± 0.0105 c 0.0244 ± 0.0031 b 
pH 
 Control 0.0070 ± 0.0001 a 0.0136 ± 0.0087 a 0.0307 ± 0.0044 a 
 8 0.0050 ± 0.0020 a 0.0106 ± 0.0022 a 0.0213 ± 0.0075 a 
 9 0.0043 ± 0.0006 a 0.0092 ± 0.0018 a 0.0278 ± 0.0087 a 
 10 0.0002 ± 0.00001 b 0.0080 ± 0.0053 a 0.0186 ± 0.0096 a 
 11 −0.0114 ± 0.0020 c −0.0311 ± 0.0076 b −0.0071 ± 0.0062 b 
TreatmentsE. crassipesP. stratiotesS. herzogii
Salinity 
 Control 0.0070 ± 0.0010 a 0.0136 ± 0.0087 a 0.0317 ± 0.0045 a 
 2,000 0.0025 ± 0.0005 a 0.0119 ± 0.0050 a 0.0301 ± 0.0075 a 
 4,000 −0.0032 ± 0.0004 b 0.0104 ± 0.0053 a 0.0292 ± 0.0050 a 
 6,000 −0.0150 ± 0.0030 c 0.0049 ± 0.0034 b 0.0281 ± 0.0044 a 
 8,000 −0.0143 ± 0.0030 c −0.0466 ± 0.0105 c 0.0244 ± 0.0031 b 
pH 
 Control 0.0070 ± 0.0001 a 0.0136 ± 0.0087 a 0.0307 ± 0.0044 a 
 8 0.0050 ± 0.0020 a 0.0106 ± 0.0022 a 0.0213 ± 0.0075 a 
 9 0.0043 ± 0.0006 a 0.0092 ± 0.0018 a 0.0278 ± 0.0087 a 
 10 0.0002 ± 0.00001 b 0.0080 ± 0.0053 a 0.0186 ± 0.0096 a 
 11 −0.0114 ± 0.0020 c −0.0311 ± 0.0076 b −0.0071 ± 0.0062 b 
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