The vegetation of the Ilgaz mountains

Résumé En Fr

The Ilgaz mountains are the greater mountain ranges in the north-west Anatolia. Its southern slopes are under the affects of Mediterranean climate with a less rainy or semi-aride very cold characters while the northern slopes under the affects of Oceanic climate. The Tigaz mountains are located in the prepontic region and generally covered with the conifer forests : the decidious forests are also seen on the lower levels and in the valleys exposing the north. Their higher parts are covered with the meadows and steppe vegetation is very rare. The sylvatic associations and syntaxa in which they are included are : A - The associations included in the order Fagetalia sylvaticae and the class Querco-Fagetea : 1. A. bornmuelleriana -Hieracium oblongum association 2. A. bornmuelleriana -Pinus sylvestris association 3. Finus sylvestris -A. bornmuelleriana association 3 -The associations included in the alliance Carpino-Acerion of the order Querco-Carpinetalia : 1. P. sylvestris -Q. petraea subsp. iberica association 2. The subassociations of Carpinus betulus and Fagus orientalis of the association of Q. petraea subsp. iberica C -The associations included in the alliance Quercion pubescentis and the class Quercetea pubescentis : 1. P. nigra subsp. pallasiana -Chamaecytisus pygmaeus association 2. Quercus pubescens -Lotus aegeus association D -The associations included in the order Astragalo-Brometalia and the class Astragalo-Brometea : l. Astragalus microcephalus -Asphodeline damascena association and its subassociations, Paracaryum pahlagonicum and Dianthus kamtembeluensis .

Les auteurs analysent la végétation de la montagne d'Ilgaz située dans le nord-ouest de l'Anatolie . Dans oe travaili ils présentent les caractères climatiques et bioclimatiques avec une interprétation phytosociologique et biogéographique de la région. En général , dans la région Prépontique, le revers septentrional des chaînes d'Ilgaz appartenant à la région biogéographique euxinienne, présente les associations de Abies bornmuellerianai, Pinus sylvestris et Fagus orientalis (ordre Fagetalia sylvaticae, classe Querco Fagetea) ainsi que les associations de Carpinus betulus, Quercus petrea ssp. iberica (alliance Carpino-Acerion, ordre Querco Carpinetalia orientalis). Le revers méridional de la chaîne d'Ilgaz, sous l'influence du climat méditerranéen, présente les associations de Pinus nigra ssp. pallasiana et Quercus pubescens (alliance Quercion pubescentis, classe Quercetea pubescentis). Enfin, l'association de Astragalus microcephalus apparaît également sur le revers méridional (ordre Astragalo-Brometalia , classe Astragalo-Brometea) .