Biogeographic Patterns of Finnish Crane Flies (Diptera, Tipuloidea)
Figure 6
Rarefied regional species richness of Finnish crane flies (Diptera, Tipuloidea) based on Malaise trapping data (see Table 1), here arranged according to ecoregions. (a) Sample-based rarefaction curves, dot line = hemi- and south boreal, dashed line = middle boreal, and solid line = north boreal. Standard deviations are not shown. (b) Rarefied species richness at the level of 101 traps, means, and SDs. H and S B = hemi- and south boreal, M B = middle boreal, and N B = north boreal ecoregion.