Environmental Engineering Reference
In-Depth Information
Tree Diagram for 20 Variables Ward's method Euclidean distances
2.5
PAN-1
PANs 2 and 3
2.0
1.5
weeks 28 and 41
week 0
1.0
week 4
weeks 8 and 12
0.5
0.0
Figure 7.33
Effect of different amendments on community composition as demon-
strated by PLFA hierarchical cluster.
7.4.3.4 Metabolic analysis: trough soil respiration
The O
2
-CO
2
decrease/increase pattern seen in the LTUs was also evident in
the troughs (Figure 7.34). Trough 2 is shown, being representative of the
respiration response in both troughs 2 and 3. The respiration response of the
control soil to tilling (trough 1) was minimal to none. Respiration and
removal data from the first 10 months showed good correlation with the
viable biomass data from the three troughs. Respiration continued in the
treated troughs during the winter months (study months 5 to 8), when the
22
8
20
data unavailable
18
6
16
14
Average O
2
Concentration
Average CO
2
Concentration
12
4
10
8
6
2
4
data unavailable
2
0
0
0
2
4
6
8
10
12
14
16
Time (months)
Figure 7.34
The microbial respiration observed over 16 months of treatment in trough
2 (biostimulation).
