Ecological parameter: current velocity (preferendum) according to Tachet

Parameter group: habitat related parameters

Explanation:
In four categories the trait describes a taxon's affinity for a specific current velocity at mesohabitat scale, from still waters (i.e. < 5 cm/s) to fast flowing waters (> 50 cm/s).

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

Type of assignment: affinity score assignment system (0 to 3)
A description of the coding system can be found here  Abbreviations/Coding Systems

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:
slow	slow	5 - 25cm/s
medium	medium	25 - 50 cm/s
fast	fast	> 50 cm/s

Assigned taxa for each higher systematic unit:

Taxagroup	Number of assigned taxa / total number of taxa - percentage
Bivalvia	3 / 77 - 3.8%
Bryozoa	6 / 19 - 31.5%
Coelenterata	2 / 13 - 15.3%
Coleoptera	52 / 2678 - 1.9%
Crustacea	11 / 270 - 4%
Diptera (excl. Chironomidae)	2 / 2404 - 0%
Ephemeroptera	16 / 353 - 4.5%
Gastropoda	15 / 241 - 6.2%
Heteroptera	10 / 124 - 8%
Hirudinea	10 / 68 - 14.7%
Kamptozoa	1 / 1 - 100%
Lepidoptera	4 / 19 - 21%
Nemertini	1 / 1 - 100%
Odonata	17 / 174 - 9.7%
Oligochaeta	16 / 240 - 6.6%
Planipennia	1 / 12 - 8.3%
Plecoptera	9 / 576 - 1.5%
Polychaeta	1 / 13 - 7.6%
Porifera	3 / 12 - 25%
Trichoptera	38 / 1439 - 2.6%
Turbellaria	4 / 61 - 6.5%