296
Data Collection For each study site, the
vegetation condition of wetland was recorded
before the collection of bird data. For each
wetland, number of species and number of
individuals were recorded in separate data
sheets thereafter. The collected data were entered
in the computer and pooled for data analysis.
Data Analysis Alpha (α) diversity was
calculated for each study site, i.e., wetland,
using Shannon–Wiener diversity index on the
records of individual study site using the
following formula (Shannon 1948):
H
p
p i
= −
( )× ( )
 
  (
)
∑ i ln , Pielou1966
where
p i = proportion of total sample represented by
species i.
Divide the no. of individuals of species i by the
total number of samples
S = number of species, = species richness.
Maximum diversity possible diversity and
evenness were calculated using formula
H
S
E
e
H
S
max
and
Evenness
In used by Pielou
= ( )
=
=
( )
ln
/
,
1966
where
H = Shannon–Wiener diversity index,
S = total number of species in the sample.
Fig. 17.1 Location of various wetlands in and around Jodhpur City
H. Singh