Epirhithral and metarhithral streams
Description (English)
Upper and middle reaches of montane and upland streams, characterised by turbulent, irregular flow, by diurnal and annual temperature variations higher than in the crenon (unit C2.16), and by aquatic biocoenoses largely dominated by Turbellaria, Ephemeroptera, Plecoptera, Trichoptera, Diptera, by Bryophyta and epilithic Bacillariophyta, Cyanophycaea, Rhodophyta and Chlorophyta algae, with few, specialised, emergent macrophytes (units C2.25-C2.28). The unit corresponds to the "Trout zone" or "Salmonid zone" of western European ichthyological classifications.
Source: EUNIS habitat classification
Quick facts
| EUNIS habitat type | code C2.21 |
|---|
Vegetation types
Relation to vegetation types (syntaxa)
Not availableSpecies mentioned in habitat description
Other classifications
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| Palaearctic Habitat Classification 200112 | 24.12 | Epirhitral and metarhitral streams | source |
| CORINE Land Cover | 5.1.1. | Water courses | n/a |
| Milieux Naturels de Suisse 1998 | 1.2.4 | Zone supérieure de la truite (épirhitron) | narrower |
| Milieux Naturels de Suisse 1998 | 1.2.3 | Zone inférieure de la truite (métarhitron) | narrower |
| Biotopes of Slovakia 1996 | 8131000 | Podhorský potok (metaritrál) | n/a |
| Biotopes of Slovakia 1996 | 8120000 | Bystrina horská (epiritrál) | n/a |
History
| Classification | Code | Habitat type name | Relationship type |
|---|---|---|---|
| EUNIS Habitat Classification 200410 | C2.21 | Epirhithral and metarhithral streams | same |
| EUNIS Habitat Classification 200308 | C2.21 | Epirhithral and metarhithral streams | same |
| EUNIS Habitat Classification 200202 | C2.21 | Epirhithral and metarhithral streams | same |
| EUNIS Habitat Classification 199910 | C2.21 | Epirhithral and metarhithral streams | same |
| EUNIS Habitat Classification 199811 | C2.22 | Epirhitral and metarhitral streams | same |
| EUNIS Habitat Classification 199712 | C2.22 | Epirhitral and metarhitral streams | same |
| Palaearctic Habitat Classification 199905 | 24.12 | Epirhitral and metarhitral streams | same |
| Palaearctic Habitat Classification 1997 | 24.12 | Epirhitral and metarhitral streams | same |
| Palaearctic Habitat Classification 1996 | 24.12 | same | |
| Palaearctic Habitat Classification 1993 | 24.12 | same | |
| CORINE Biotopes Classification 1991 | 24.12 | same | |
| CORINE Biotopes Classification 1989 | 24.12 | same |
