Ecological parameter: trophic status (preferendum) according to Tachet

Parameter group: saproby related parameters

Explanation:
This trait describes the distribution of aquatic invertebrates according to the trophic status (nutrient availability) of a water body, from oligotrophic (i.e. low nutrient availability and thus low biological productivity) to eutrophic (i.e. high nutrient availability and thus high biological productivity). Indirectly, this trait provides information on a taxon's sensitivity to general nutrient availability and eutrophication. Three 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:
oligotrophic	oli	low nutrient availability, low biological productivity
mesotrophic	meso	low nutrient availability, intemediate biological productivity
eutrophic	eu	high nutrient availability, high biological productivity

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%