Free access
Ann. For. Sci.
Volume 52, Number 6, 1995
Page(s) 589 - 606
Ann. For. Sci. 52 (1995) 589-606
DOI: 10.1051/forest:19950606

Natural black pine (Pinus nigra subsp salzmannii) forests of the Iberian eastern mountains: development of the phytoecological basis for their site evaluation

P Regato-Pajaresa and R Elena-Rossellób

a  Centro de lnvestigación Forestal, INIA, apartado 8111, Madrid
b  Departamento de Silvopascicultura, Universidad Politecnica de Madrid, 28040 Madrid, Spain

Abstract - A phytoecological study of the Pinus nigra subsp salzmannii forests in the dolomite-limestone mountains of eastern Spain was undertaken. Starting from several floristic and ecological data collected from 355 relevés, classification and ordination numerical analysis were realized. A typification of the different pine forest communities was thus obtained and a series of floristic groups was defined, which can be used as a basis for the classification of distinct sites. Following the phytosociological method, 2 main groups, which can be considered as climax vegetation of the high supra- and mountain-Mediterranean levels, have been defined: a continental group, Thalictro tuberosi-Pinetum salzmannii, and a subcontinental group, Lonicero xylostei-Pinetum salzmannii, which represents the southern range limit of Pinus nigra forests in the eastern Pyrenees.

Résumé - Typologie phytoécologique des stations forestières: les forêts naturelles de pin de Salzmann (Pinus nigra subsp salzmannii) des montagnes orientales ibériques. La présente étude concerne la caractérisation phytoécologique des forêts de Pinus nigra subsp salzmannü des montagnes orientales de l'Espagne. Des analyses numériques de classification et ordination ont été réalisées avec 355 relevés comprenant des données floristiques et écologiques. La typologie des différents groupements silvatiques de Pinus salzmannii a permis d'établir plusieurs groupes floristiques, susceptibles d'être utilisés dans la caractérisation des stations forestières de cette essence. Selon la méthode phytosociologique, ont été distinguées 2 associations qui représentent sûrement la végétation climatique à l'horizon supérieur de l'étage supraméditerranéen et à l'étage montagnard-méditerranéen : Thalictro tuberosi-Pinetum salzmannii dans la partie occidentale avec des conditions climatiques méditerranéo-continentales, et Lonicero xylostei-Pinetum salzmannii dans la partie orientale avec des conditions climatiques sub-continentales. Les forêts de pin de Salzmann qui appartiennent à la dernière association représentent la limite méridionale de ce groupement caractéristique des Pyrénées orientales.

Key words: Pinus nigra / numerical analysis / phytosociology / climax / floristic group

Mots clés : Pinus nigra / analyse numérique / phytosociologie / climat / groupe floristique

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