Species Richness and Diversity of Resident and Migratory Landbirds in Remnant Forest Patches and Residential Areas in the Florida Keys, USA
Table 3
Heterogeneous slopes model results used to evaluate the influence of site and landscape variables on species richness, species diversity (using Shannon-Wiener index values), and the effective number of species (converted from Shannon-Wiener Index values; [26]) for migratory (MS) and resident (YR) birds, in the Florida Keys during MarchβMay 2004 and 2005. Only the final model solutions and respective Akaike information criterion (AIC) values are presented. Model variables are defined in Table 1.
(a) Species richness final model solutions (AIC = 795.57)
Effect
Group ID
Estimate
Std. error
DF
t value
Pr >
Group
MS
5.04
0.36
162
14.14
<0.01
YR
9.63
0.24
162
39.47
<0.01
SIZEHAM
MS & YR
β0.02
0.07
162
β2.35
0.02
PCT_HAM*group
MS
0.03
0.01
162
3.99
<0.01
YR
β0.03
0.01
162
β6.23
<0.01
(b) Species diversity final model solutions (AIC = 203.52)
Effect
Group ID
Estimate
Std. error
DF
t value
Pr >
Group
MS
1.28
0.12
162
10.79
<0.01
YR
2.02
0.08
162
26.69
<0.01
D2HAM
MS & YR
<β0.01
<0.01
162
β2.10
0.04
SIZEHAM
MS & YR
<β0.01
<0.01
162
β2.14
0.04
PCT_CAN*group
MS
<0.01
<0.01
162
0.79
0.43
YR
β0.01
<0.01
162
β3.35
<0.01
PCT_HAM*group
MS
<0.01
<0.01
162
2.84
0.01
YR
β0.01
<0.01
162
β7.95
<0.01
CT_OTHERHAB*group
MS
β0.03
0.01
162
β2.47
0.02
YR
0.01
0.01
162
1.58
0.12
(c) Effective number of species final model solutions (AIC = 678.45)