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Ecological parameter: longitudinal distribution according to Tachet

Parameter group: region related parameters

Explanation:
The trait describes the longitudinal distribution of aquatic invertebrates, ranging from the source (crenon) to the lower part of large rivers (metapotamon) and estuaries. Water bodies not directly connected to the main stream (e.g. lakes, ponds, pools, disconnected side-arms, marshes, temporary waters) are summarised in the "outside river system" category. Eight categories are defined.

Tachet, H., Bournaud, M., Richoux, P. & Usseglio-Polatera, P. (2010): Invertébrés d'eau douce - systématique, biologie, écologie. CNRS Editions, Paris, 600 p.


Additional information:
Note that several classifications of the Tachet database are on higher taxonomic level than on species level. To display them in the list please enable "include higher taxonomic units" in the "advanced search".

Abbreviations:
Category name:Abbreviations:Explanation:
crenoncrspring region
epirithronerupper-trout region
metarithronmrlower-trout region
hyporithronhrgrayling region
epipotamonepbarbel region
metapotamonmpbream region
estuaryestbrackish water region
outside river systemoutoutside river system
Assigned taxa for each higher systematic unit:
TaxagroupNumber of assigned taxa / total number of taxa - percentage
Bivalvia3 / 77 - 3.8%
Bryozoa6 / 19 - 31.5%
Coelenterata2 / 13 - 15.3%
Coleoptera52 / 2678 - 1.9%
Crustacea11 / 270 - 4%
Diptera (excl. Chironomidae)2 / 2404 - 0%
Ephemeroptera16 / 353 - 4.5%
Gastropoda15 / 241 - 6.2%
Heteroptera10 / 124 - 8%
Hirudinea10 / 68 - 14.7%
Kamptozoa1 / 1 - 100%
Lepidoptera4 / 19 - 21%
Nemertini1 / 1 - 100%
Odonata17 / 174 - 9.7%
Oligochaeta16 / 240 - 6.6%
Planipennia1 / 12 - 8.3%
Plecoptera9 / 576 - 1.5%
Polychaeta1 / 13 - 7.6%
Porifera3 / 12 - 25%
Trichoptera38 / 1439 - 2.6%
Turbellaria4 / 61 - 6.5%