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handle: 10261/100319
[FR] Les caractéristiques architecturales basiques de 45 arbustes de12 familles sont décrites dans un matorral semi-aride méditerranéen à Cabo de Gata (SE de l'Espagne). Six différents modèles architecturaux de croissance de plantes sont décrits :Scarrone, Rauh, Holttum, Leeuwenberg, Champagnat et Corner.Le modèle de Tomlinson a été considéré comme une varianteà répétition basitone des modèles de Rauh, Corner, Leeuwenberg et Holttum. La variation sympodiale du modèle de Scarrone a été trouvée comme étant la plus commune dans la zone étudiée. Les caractères fonctionnels comme la hauteur de la plante, la croissance annuelle et la surface de recouvrement de la plante ont été corrélés avec les modéles architecturaux.Ainsi, des petits arbustes de taille inférieure à 0,6 m, avec une faible croissance annuelle (0,1-0,25 m) et une petite surface de recouvrement (0,5-1 m2), ont plutôt présenté un modèle de croissance sympodique, une ramification dichasiale acrotone et des inflorescences terminales. Inversement, les grands arbustes d'une hauteur de 1-3 m, présentant une large surface de recouvrement (1-3 m2), une forte croissance de rameaux latéraux (> 0,25 m) ont montré un modèle de croissance déterminé portant des inflorescences latérales. Le premier de ces deux groupes comportent des espèces qui se développent suivant la variante sympodiale du modèle de Scarrone, tandis que le second groupe contient des espèces obéissant au modèlede Rauh et incluant des arbustes épineux des communautés climaxiques.
[EN] The basic architectural features of 45 shrub species representing 12 families are described from a Mediterranean semi-arid shrubland in the location of Cabo de Gata (SE Spain). Six different architectural models were recognized: Scarrone, Rauh,Holttum, Leeuwenberg, Champagnat and Corner. The Tomlinson model was recognized as a variation with basitonic repetition of the Rauh, Corner, Leeuwenberg and Holttum models. The sympodic variant of the Scarrone model was the mostcommon in our study area. Functional traits such as plant height, lateral spread and plant coverage were correlated with the architectural models. Small shrubs up to 0.6 m height with reduced lateral spread (0.1-0.25 m) and plant coverage (0.5-1 m2) were likely to have sympodic growth patterns, acrotonic dichasial branching and terminal inflorescences. Inversely,large shrubs up to 1-3 m in height, with large canopies (1-3 m2), and well developed lateral spread (> 0.25 m) were likely to have a determinate growth pattern with lateral inflorescences. The first group have species which grow following the sympodic variant of the Scarrone model, whereas the second group presents species following the Rauh model and includes thorny shrubs from the climax communities.
Peer reviewed
16 páginas
Cabo de Gata Natural Park, Ecology, Spain, Plant architecture, Mediterranean vegetation, Semi-arid shrubs, Plant conservation, Functional traits
Cabo de Gata Natural Park, Ecology, Spain, Plant architecture, Mediterranean vegetation, Semi-arid shrubs, Plant conservation, Functional traits
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