Chemistry Reference
In-Depth Information
Figure 2.
Behavior of E x Qleaf (a), Gs x Qleaf (b), E x VPD (c) and Gs x VPD (d) in the three scales of
observation: pot, plot and watershed. Each point represents a mean of four measurements.
3.2. Interdependence of ecophysiological and environmental variables
In order to better understand the interdependence of ecophysiological variables (E and Gs)
and environmental (Qleaf and VPD), it was established a ratio between the hourly mean of
all values observed during the study period, E, Gs and their respective hourly mean of Qleaf
and VPD (Table 2) With this mean ratio, we attempted to exclude the influence of variation
of the concentration gradient of water and Qleaf or VPD in order to characterize the
difference in diffusion behavior according only to the structure and physiology of the
Eucalyptus grandis x Eucalyptus urophylla
. The differences between the scales of study were
significant in almost all majority. The exceptions were observed in the E / VPD between the
plot and watershed scales that were similar (Figure 2b) and the ratio Gs / VPD between the
pot and watershed scales, in contrast in this case, to what it was observed in Figure 2d.
Between Scales
E/Qleaf
E/VPD
Gs/Qleaf
Gs/VPD
Pot x Plot
**
**
**
*
Pot x Watershed
**
**
**
ns
Plot x Watershed
**
ns
**
**
** e * = significant at 1% and 5% respectively, ns = non-significant
Table 2.
Results of Tukey test comparing the means of the ratio E / Qleaf, E / VPD, Gs / Qleaf and Gs/
VPD for
Eucalyptus grandis x Eucalyptus urophylla
in the three scales of study.
