Network matrices
We compiled the inferred interactions into interaction incidence
matrices where each cell value represented the number of observed
interactions between each bat-plant taxon pair. We considered one
realized interaction when the DNA of a plant taxon was detected in the
faeces of one individual bat. We constructed matrices for (1) each
forest site in which we pooled data from both seasons during the El Niño
year (‘La Selva’ and ‘Santa Rosa’), and (2) for each forest site in
which we separated the data collected for dry and wet season during the
normal and El Niño (‘wet’ versus ‘dry’ for each site). Each matrix
constructed for each forest site during each season and the matrices
using data pooled for the whole year in each forest site were used to
compare between networks and null models.