Environmental Engineering Reference
In-Depth Information
Table 3.5 (cont.)
Variable
Methodology
Palm leaves
All leaves measured. Partially open leaves counted as fraction of open leaf. Leaf length
measured monthly to track growth
Palm stem
Leaf scars counted at monthly intervals. Stem growth quantified as height increment
increment
(cm) per leaf scar
Palm age
Count of leaf scars, assume constant rate of production to give estimates of age and numbers
of years to reach critical heights
Bulb size
Measurement of maximum width of largest leaf on each plant. Regression analysis
performed on a random sample of 50 plants at each site indicated that the largest leaf's
maximum is strongly correlated to total leaf area. Total leaf area already shown
to be an indicator of bulb size
Bamboo
Measure clump dimensions on orthogonal axes at ground level, 1 m and full canopy extent.
biomass
Map these as concentric ellipses. Determine biomass as volume of cone projected upwards
from the base of the clump. Site index
clump volume/clump
Bushmeat
Opportunistic records of weights of captured animals in three villages used to supplement
weight
animal census
Source: FAO (2001)
