Network structure in wet and dry seasons within each forest in
relation to null models
For the dry forest, we found that most of the network metrics deviated
from expected null distribution for the dry season, whereas there were
no significant differences for the wet season during the El Niño year.
However, some metrics showed deviation during the wet season of the
normal year. During the dry season, the network was more
compartmentalized (mean= 1.24; SD= 0.45; p-value= 0.00), less nested
(weighted NODF) (mean= 15.29; SD= 2.95; p-value= 0.00), less connected
(weighted connectance) (mean= 0.12; SD= 0.01; p-value= 0.05), and more
modular than expected by the null models (mean= 0.50; SD= 0.03; p-value=
0.01). During the wet season of the normal year, the network was less
nested (weighted NODF) (mean= 22.80; SD= 3.45; p-value= 0.01) and less
connected (weighted connectance) (mean= 0.14; SD= 0.01; p-value= 0.00).
Similar to the dry forest, we found that network metrics in the
rainforest deviated from expected in only in the dry season. The network
was less nested (weighted NODF) (mean= 12.73; SD= 3.03; p-value= 0.03)
and more modular (mean= 0.37; SD= 0.04; p-value= 0.00) than expected by
the null models. With regard to differences between seasons, we detected
that the difference in robustness of bat species to plant extinctions
was lower than expected by chance (p-value= 0.03) between seasons in the
rainforest. In the dry forest, we found a higher niche overlap in the
wet season of the normal year in comparison with the wet season of the
El Niño year (p-value= 0.03) (Table 2).