Table 1. Species richness estimates based on abundance data for poorly known insect groups from the Malaise trap inventory.
“Known spp 2003” is the number of species known from Sweden prior to the inventory. For the inventory material, we give the proportion of the catch (Prop) and the number of specimens (N) processed, as well as the total number of species found (Spp), and the number of those species that were not recorded as Swedish prior to the inventory (New). Species richness estimates include expert guesses (Expert) from 2002, before the inventory (first number) and from 2017, after partial results were known (second number). Estimates also include extrapolations using mark-recapture (MR), Chao’s estimator based on the entire material (Chao1) or on occurrences of species across sites (Chao2); and the new combined non-parametric estimator introduced here (CNE). See S5 Table for more detailed results and additional species richness estimates. Data for Ichneumoninae do not include the tribe Phaeogenini.
| Taxon | Known spp 2003 | Malaise trap inventory catch | Species richness estimates | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Prop | N | Spp | New | Expert | MR | Chao1 | Chao2 | CNE | ||
| Dolichopodidae | 314 | 26% | 43011 | 204 | 31 | 356–360 | 370 | 219 | 235 | 246 |
| Phoridae | 182 | 6% | 33797 | 863 | 743 | 1100–1100 | 1306 | 1171 | 1639 | 1982 |
| Drosophilidae | 59 | 23% | 7405 | 39 | 4 | 66–80 | 66 | 46 | 63 | 106 |
| Ichneumoninae (part) | 325 | 33% | 5659 | 235 | 50 | 480–490 | 413 | 307 | 312 | 373 |
| Heleomyzidae + Odiniidae | 54 | 20% | 4911 | 62 | 21 | 62–80 | 82 | 71 | 73 | 84 |
| Sepsidae | 34 | 22% | 3870 | 16 | 1 | 32–38 | 36 | 16 | 16 | 16 |
| Platygastridae (s. str.) | 124 | 15% | 2971 | 164 | 92 | 250–270 | 282 | 186 | 218 | 267 |
| Symphyta | 584 | 28% | 2912 | 183 | 34 | 875–799 | 717 | 238 | 256 | 318 |
| Diplazontinae | 49 | 33% | 2788 | 63 | 24 | 80–90 | 79 | 68 | 69 | 73 |
| Pimplinae | 127 | 27% | 1521 | 64 | 9 | 150–150 | 148 | 112 | 97 | 121 |
| Thysanoptera | 119 | 6% | 1528 | 34 | 1 | 117–186 | 123 | 54 | 65 | 113 |
| Euphorinae: Meteorini | 37 | 27% | 1304 | 39 | 10 | 60–53 | 50 | 42 | 42 | 43 |
| Piophilidae | 17 | 26% | 1063 | 11 | 1 | 17–25 | 19 | 11 | 11 | 11 |
| Sciomyzidae | 77 | 16% | 1021 | 58 | 3 | 85–83 | 81 | 61 | 93 | 140 |
| Other groups | 888 | 2–67% | 6769 | 474 | 148 | 1358–1681 | 1289 | 627 | 887 | 1268 |
| TOTAL SAMPLE | 2990 | 2–67% | 120530 | 2509 | 1172 | 5088–5515 | 5610 | 3234 | NA | NA |
| GROUP TOTALS | 2990 | 2–67% | 120530 | 2509 | 1172 | 5088–5515 | 5057 | 3228 | 4076 | 5159 |