7140 - Tourbières de transition et tremblantes

Transition mires and quaking bogs

Liste hiérarchisée et descriptifs des habitats d'intérêt communautaire de la directive "Habitats"

Description

Peat-forming communities developed at the surface of oligotrophic to mesotrophic waters, with characteristics intermediate between soligenous and ombrogenous types. They present a large and diverse range of plant communities. In large peaty systems, the most prominent communities are swaying swards, floating carpets or quaking mires formed by medium-sized or small sedges, associated with sphagnum or brown mosses. They are generally accompanied by aquatic and amphibious communities. In the Boreal region this habitat type includes minerotrophic fens that are not part of a larger mire complex, open swamps and small fens in the transition zone between water (lakes, ponds) and mineral soil.
These mires and bogs belong to the Scheuchzerietalia palustris order (oligotrophic floating carpets among others) and to the Caricetalia fuscae order (quaking communities). Oligotrophic water-land interfaces with Carex rostrata are included.

Espèces caractéristiques

Plants: Eriophorum gracile, Carex chordorrhiza, Carex lasiocarpa, Carex diandra, Carex rostrata, Carex limosa, Scheuchzeria palustris, Hammarbya paludosa, #Liparis loeselii, Rhynchospora alba, R. fusca, Menyanthes trifoliata, Epilobium palustre, Pedicularis palustris, Sphagnum sp. (S. papillosum, S. angustifolium, S. subsecundun, S. fimbriatum, S. riparium, S. cuspidatum, Calliergon giganteum, Drepanocladus revolvens, Scorpidium scorpioides, Campylium stellatum, Aneura pinguis.

Correspondances avec la classification du Paléarctique

54.5

Correspondances avec d'autres classifications

United Kingdom classification: ‘M4 - Carex rostrata-Sphagnum recurvum mire', ‘M5 - Carex rostrata-Sphagnum squarrosum mire', ‘M8 - Carex rostrata-Sphagnum warnstofii mire', ‘M9 Carex rostrata-Calliergon cuspidatum/giganteum', ‘S27 -Carex rostrata-Potentilla palustris fen'.
German classification: ‘360201 Übergangs- oder Zwischenmoor der planaren bis submontanen Stufe', ‘360202 Übergangs- oder Zwischenmoor der montanen bis hochmontanen Stufe'.
Nordic classification: ‘312 Ristuvvegetation', ‘32 Fattigkärrvegetation (except 321)', ‘314 Mjukmatte-och lösbottenvegetation på öppna mossar', ‘3321 Trichophorum caespitosum- Molinia caerulea-Sphagnum spp.-Drepanocladus spp.-typ', ‘3323 Carex nigra- Drepanocladus exannulatus-Calliergon spp.-typ', ‘Trichophorum caespitosum- Drepanocladus revolvens-variant of 3323', ‘3331 Carex spp.-Sphagnum spp.- Drepanocladus spp.-typ', ‘Carex spp.-Sphagnum fallax-subsecundum-variant of 3331', ‘3333 Potentilla palustris-Carex spp.-Sphagnum spp.- Drepanocladus exannulatus-typ', ‘3341 Carex spp.-Phragmites-Iris pseudacorus-Sphagnum-typ'.

Remarques

Associated with amphibious communities (22.3), fens (54.2 et 54.4), bogs (51.1-2) or humid grasslands (37.2-3).

Bibliographie

Conseil de l'Union européenne, 2013. Directive 2013/17/UE du Conseil du 13 mai 2013 portant adaptation de certaines directives dans le domaine de l'environnement, du fait de l'adhésion de la République de Croatie. Annexes. Partie B Protection de la nature. Journal officiel de l'Union européenne, L 158 du 10/06/2013, p. : 195-203. (Source)

Du Rietz, G. E. (1949). Huvudenheter och huvudgränser i svensk myrvegetation. Sven. Bot. Tidskr. 43:274-309.