Macro-arthropods survey Drentsche Aa 1996

Study Extent

March -December 1996

Sampling

Bio-photo eklektors with one lightfall in the top and two pitfalls at ground level, for which the space was created by getting soil out of the grasslands were moved every fortnight. The lightfalls and pitfalls contained formaldehyde solution 2%. Soil samples were taken bi-weekly, lightfalls were emptied weekly and pitfalls were emptied weekly.

Quality Control

Identifications of ground beetles were done by personnel of the biological station in Wijster; beetle larvae were identified by Michael Traugeot; weevils were identified by Theodoor Heijermans; click beetles were checked by Alterra; spiders and harvestmen were identified by Aart Noordam; millipedes, centipedes were identified by Matty Berg

Method steps

1. All identifications, to order, family, genus or species were stored in excel files; these were checked thoroughly. Thereafter, the dataset was generated in GBIF style with the help of an R program.

Beetles, flies, midges, spiders, harvestmen, centipedes, millipedes, isopods, cicadas, moths, earwigs, earthworms

1. Annelida; Lumbricidae
   common name: earthworms rank: family
2. Arachnidae; Liniphiidae
   common name: spiders rank: family
3. Arachnidae; Erigoninae
   common name: spiders rank: subfamily
4. Arachnidae
   common name: spiders rank: species
5. Opilionidae
   common name: harvestmen rank: species
6. Chilopoda
   common name: centipedes rank: species
7. Diplopoda
   common name: millipedes rank: species
8. Auchenorrhyncha
   common name: cicadas rank: order
9. Coleoptera
   common name: beetles rank: family
10. Coleoptera
    common name: beetles rank: subfamily
11. Cantharidae
    common name: soldier beetles rank: species
12. Carabidae
    common name: carabid beetles rank: genus
13. Carabidae
    common name: carabid beetles rank: species
14. Curculionidae
    common name: weevils rank: genus
15. Curculionidae
    common name: weevils rank: species
16. Elateridae
    common name: click beetles rank: family
17. Elateridae
    common name: click beetles rank: genus
18. Elateridae
    common name: click beetles rank: species
19. Silphidae
    common name: carrion beetles rank: species
20. Staphylinidae
    common name: rove beetles rank: family
21. Staphylinidae
    common name: rove beetles rank: genus
22. Staphylinidae
    common name: rove beetles rank: species
23. Dermaptera
    common name: earwigs rank: order
24. Diptera
    common name: flies and midges rank: suborder
25. Diptera
    common name: flies and midges rank: family
26. Heteroptera
    common name: true bugs rank: suborder
27. Hymenoptera
    common name: wasps rank: suborder
28. Symphyta
    common name: sawflies rank: suborder
29. Lepidoptera
    common name: butterflies and moths rank: order
30. Lepidoptera
    common name: butterflies and moths rank: suborder
31. Caelifera
    common name: grasshoppers and grasshopper-like insects rank: suborder
32. Isopoda
    common name: isopods rank: species

Streamdal valley of the Drentsche Aa, Anloo, The Netherlands