Table 1.
Environmental variables associated with absolute abundance of Simulium species collected in 2020
| Season | Total N in traps | Total black fly abundance | S. robynae abundance | S. meridionale abundance | S. mediovittatum abundance |
|---|---|---|---|---|---|
| Spring (March–May) | 7571 | (+) Precipitation (2 month lagged) | None significant | (+) Precipitation (2 month lagged) | None sampled |
| Summer (June–August) | 5080 | (+) Maximum temperature | (−) Precipitation (2 month lagged) | None significant | None significant |
| Fall (September–November) | 912 |
(−) NDVI (+) Precipitation (1 year lagged) |
None sampled | Not analyzed because of small sample size | Not analyzed because of small sample size |
Factors analyzed: NDVI (bi-monthly mean), average flow rate (feet3/ s), maximum temperature (°C; daily), precipitation of month sampled, 2-month lagged precipitation and 1-year lagged precipitation (mm). Blue represents a positive association, and orange represents a negative association. Associations with total black fly abundance were previously reported by Young et al. [18]