TABLE 1. Average naphthenic acid, conductivity, pH, dissolved oxygen (DO) and temperature at the sediment water interface (Temp 1), air temperature (Temp 2) and precipitation for each month. As well as thecamoebian population specific information, such as average species diversity (SDI), percent of the population composed of difflugiids and percent of the population composed of living (stained by Rose Bengal at time of collection) tests. The coefficient of variation indicates similarity among each parameter, and P-values indicate the degree of influence each parameter (variable) had on the independents.
 
 
Date
Naphthenic Acids (mg/L)
Conductivity (µS/cm)
pH
DO
Temp 1 (Cº)
Temp 2 (Cº)
Precipitation (mm)
Thecamoebian Species Diversity (SDI)
% Difflugiid
% Living
 
May, 08
38.4
1825
7.8
<0.6
12.5
10.1
7.8
2.22
80.6
 43.3
 
July, 08
37.5
2266
7.92
<0.5
17.9
16.2
56.6
2.32
85.9
 76.0
 
August, 08
26
2060
8.25
<0.4
17.8
15.9
137.6
2.03
74.6
 71.0
 
September, 08
34
1810
8.31
<0.4
9.5
9.8
27.4
2.21
84.1
 32.8
 
March, 09
20
1680
8.45
<0.5
1.3
-0.9
19.8
2.35
87.8
7.63
 
Coefficient
of variance
0.206
0.101
0.034
0.169
0.583
0.587
1.048
0.056
0.063
0.611
 
P-values comparing parameters to % difflugiid
0.210
0.745
0.791
0.655
0.674
-
0.568
P-values comparing parameters to % living
0.702
0.068
0.335
0.783
0.002
-
0.014