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Table 7 Correlation (r values) of heavy metal concentrations in wastewater and mosquito larvae samples from Sinai site

From: Urban mosquitoes and filamentous green algae: their biomonitoring role in heavy metal pollution in open drainage channels in Nairobi industrial area, Kenya

 

Hg

Pb

Cr

Cd

Tl

Ni

Wastewater

      

 Hg

–a

     

 Pb

–

1

    

 Cr

–

 − 0.820

1

   

 Cd

–

0.998*

 − 0.784

1

  

 Tl

–

0.453

 − 0.881

0.397

1

 

 Ni

–

0.998*

 − 0.858

0.992

0.513

1

Mosquito larvae

      

 Hg

1

     

 Pb

0.009

1

    

 Cr

 − 0.225

0.972

1

   

 Cd

 − 0.022

 − 1.000**

 − 0.969

1

  

 Tl

 − 0.022

 − 1.000**

 − 0.969

1.000**

1

 

 Ni

 − 0.418

 − 0.912

 − 0.792

0.918

0.918

1

  1. *Correlation significance at the 0.05 level (2 tailed)
  2. **Correlation significance at the 0.01 level (2-tailed)
  3. aCorrelation could not be computed because one of the variables was constant (level of Hg was < 0.1 ppb throughout)
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BMC Ecology and Evolution

ISSN: 2730-7182

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