Research Article

Physiological Response of the Freshwater Mussel Unio douglasiae in Microcystis aeruginosa Bloom Waters

Table 5

Correlation coefficients () between the mortality of Unio douglasiae and environmental variables at the depth of 20 cm, at which the highest mortality was observed. Variables are listed in the order of decreasing absolute values. Statistical significance is denoted by asterisks ( and , sequential Bonferroni test).

Variables

Water temperature-0.964
Chemical oxygen demand-0.893
pH-0.832
Protozoa density-0.571
Total phosphorus-0.529
Phytoplankton density-0.464
Chlorophyll-a-0.357
Bacterial density-0.331
Suspended solids-0.329
Electric conductivity-0.284
Nitrate0.875
Total nitrogen0.831
Ammonia0.818
Silicate0.567
Dissolved oxygen0.444
Zooplankton density0.249
Turbidity0.108
Soluble reactive phosphorus0.093
Transparency0.028