Table 2 Variables analyzed in the present study
Variables | Definition |
|---|---|
Species richness | Total number of species sampled at each sampling point |
Shannon–Wiener index | Measure of species diversity weighted by relative abundance [33] |
Functional richness (FRic) | Represents the quantity of functional space filled by the community, where low FRic implies that some resources are unused or unavailable in the ecosystem [34] |
Functional evenness (FEve) | Describes the distribution of abundance in a functional space of traits, where low FEve indicates that some parts of the functional niche are underutilized [34] |
Functional divergence (FDiv) | A measure of the functional similarity among the dominant mosquito species of a community. FDiv is high when the most abundant species have extreme functional trait values [34] |
Functional dispersion (FDis) | A multivariate measure of the dispersion of mosquito species in the trait space, and represents the mean distance of species to the centroid of the community, weighted by mosquito species abundance [35] |
Haemagogus relative abundance | The number of Haemagogus mosquitoes divided by the total number of mosquitoes collected at each sampling point |
Haemagogus minimum infection rate (MIR) | Represents the minimum number of infected mosquitoes, assuming that in each positive mosquito pool only one was infected. It was calculated for each sampling point using the formula MIR = number of YFV-positive Haemagogus pools / total number of Haemagogus tested (only the points sampled during YFV outbreak were considered, as there was no evidence of YFV circulation in the past 70 years) |
Positivity of sampling points | Binary variable. Equal to 1 when at least one mosquito pool tested positive for YFV (only the points sampled during YFV outbreak were considered) |
Altitude | The altitude related to sea level for each sampling point |
Normalized Difference Vegetation Index (NDVI) | Analyzes the conditions of the vegetation coverage through images generated by remote sensing [23] |
Fragment size | The area of the forested patch around each sampling point |
Land use/land cover | Categorical variable describing the type of human activity and vegetation cover at each sampling point |