Information

Ecological parameter:  longitudinal distribution according to Tachet

Parameter group: region preference parameters

Explanation:
This trait describes the longitudinal distribution of aquatic invertebrates 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 including in the "outside river system" category. Eight categories have been defined.

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:
AbbreviationExplanation
crcrenon
erepirithron
mrmetarithron
hrhyporithron
epepipotamon
mpmetapotamon
estestuary
outoutside river system
Assigned taxa for each higher systematic unit
TaxagroupNumber of assigned taxa / total number of taxa - percentage
Porifera3 / 9 - 33.3%
Coelenterata2 / 13 - 15.3%
Turbellaria4 / 60 - 6.6%
Kamptozoa1 / 1 - 100%
Nemertini1 / 1 - 100%
Gastropoda15 / 230 - 6.5%
Bivalvia3 / 66 - 4.5%
Polychaeta1 / 13 - 7.6%
Oligochaeta16 / 234 - 6.8%
Hirudinea10 / 66 - 15.1%
Crustacea11 / 255 - 4.3%
Ephemeroptera16 / 344 - 4.6%
Odonata17 / 158 - 10.7%
Plecoptera9 / 571 - 1.5%
Heteroptera10 / 124 - 8%
Planipennia1 / 12 - 8.3%
Coleoptera53 / 3342 - 1.5%
Trichoptera38 / 1428 - 2.6%
Lepidoptera4 / 18 - 22.2%
Diptera (excl. Chironomidae)2 / 2342 - 0%
Bryozoa6 / 16 - 37.5%