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Table 1 Student-Newman-Keuls' (SNK) Test Comparison of Chlorophyll a concentrations for Control, Nitrogen (N), Phosphorus (P), and Nitrogen plus Phosphorus (N + P) treatments using Passive Diffusion Periphytometer in the Bosque River Watershed during the period of July 17 – 30, 1997 (from Matlock et al., 1999, included for comparison).

From: Measuring variability in trophic status in the Lake Waco/Bosque River Watershed

Site

Treatment

Number of Replicates

Mean Chl. a (μg cm-2)

Standard Deviation (μg cm-2)

SNK Group (α = 0.05)

NB-01

Control

10

0.88

0.60

   

D

E

 

N

10

0.95

0.38

   

D

E

 

P

9

1.06

0.53

   

D

E

 

N + P

10

0.98

0.53

   

D

E

NB-02

Control

10

4.58

0.86

A

    
 

N

10

5.10

1.61

A

B

   
 

P

9

6.22

1.91

A

B

   
 

N + P

10

5.19

1.86

A

B

   

NB-04

Control

7

1.73

0.37

  

C

D

 
 

N

5

2.08

0.38

  

C

D

 
 

P

9

2.49

0.51

  

C

  
 

N + P

8

5.73

1.36

A

B

   

MB

Control

10

0.47

0.20

    

E

 

N

9

0.52

0.08

    

E

 

P

9

0.90

0.32

   

D

E

 

N + P

10

5.87

1.93

A

B

   

NC

Control

10

0.48

0.14

    

E

 

N

10

0.59

0.17

    

E

 

P

9

2.70

1.16

  

C

  
 

N + P

10

2.67

0.82

  

C

  
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Journal of Biological Engineering

ISSN: 1754-1611