34.11 - Euro-Siberian rock debris swards

Classification des habitats du Paléarctique (2001)

Description

Open lowland and hill rock debris swards of suboceanic, temperate, boreal or submediterranean, climates of Western Europe and of Central Europe, east, sporadically, to Poland, the hills of the Pannonic plain and the Adriatic coasts of the northwestern Balkan peninsula, formed mostly by annuals and succulents or semisucculents on decomposed rock surfaces of edges, ledges or knolls, with calcareous or siliceous soils frequently disturbed by erosion or rabbits. They comprise a great variety of distinct and often very local, isolated communities harbouring many characteristic species, among which numerous rare forms including both relict and evolutionarily recent taxa. Together with more evolved grassland communities of unit 34.35, sometimes 34.31, 34.33 or 34.341, very paucispecific communities of units 62.1B or 62.29, and lacunar shrub formations of unit 31.8, they constitute the vascular vegetation of middle European inland cliffs and rock outcroppings of unit 62.4.

Correspondances phytosociologiques

Sedo albi-Scleranthetea perennis: Sedo albi-Scleranthetalia perennis (Alysso alyssoidis-Sedetalia albi): Alysso alyssoidis-Sedion albi, Sedo albi-Veronicion dillenii (Arabiopsidion thalianae, Veronicion), Hyperico perforati-Scleranthion perennis, Hyperico linearifolii-Sedion reflexi, Sedion anglici, Vulpio ciliatae-Crepidion neglectae

Bibliographie

Devillers P., Devillers-Terschuren J. & Vander Linden C., 2001. PHYSIS Palaearctic Habitat Classification Database. Updated to 10 December 2001. Institut Royal des Sciences Naturelles, Bruxelles. (Source)

Lebrun & al., 1949; Ellenberg, 1963, 1988: 484-485; Royer, 1977; Rivas-Martinez, 1977a; Schumacher, 1977; Soo, 1980; Guinochet and Vilmorin, 1973; Moravec & al., 1983; Matuszkiewicz, 1984; Nordiska ministerradet, 1984; Duvigneaud, 1985; Parent, 1986; Duvigneaud and Saintenoy-Simon, 1988a; Zimmermann & al., 1989; Poldini, 1989: 139-145; Oberdorfer, 1990; Schubert and Vent, 1990; Pott, 1992: 248-250; Julve, 1993: 36-38; Mucina and Kolbek, 1993b: 511-517; Påhlsson, 1994; Schubert & al., 1995: 268-272; Seliskar, 1998: 14.