The roles of abiotic factors, dispersal, and species interactions in structuring stream assemblages of black flies (Diptera: Simuliidae)

Table 3 Results of null-model analyses of species co-occurrences of larval black flies

¹Mean C-scores are the means from the test distribution generated using the randomization algorithms.
²p is the probability of a C-score > observed C-score under a random model
³effect size was calculated as (C_obs – C_m)/SD, where C_obs = observed C-score, C_m = mean C-score of the test distribution, and SD = standard deviation of the test distribution.
⁴Due to the low number of sites (n = 6), null-model analysis was not performed for Sandhills collections in the summer.