The taxonomical composition and an analysis of four ecological characteristics
of the 46 endemic species occurring in the lower Duero Basin (CW
Iberian Peninsula) have been made. A comparative analysis of the results
reveals that this endemic flora does not comply with the general patterns previously
observed in other floras. Predominant life forms are hemicryptophytes
(43%) and chamaephytes (22%). As far seed-dispersal is concerned, 54% of the
endemic species lack any noteworthy adaptative feature. 89% of the endemic
species are pollinated by animals (mostly by insects) and only 1 species is dioecious.
Following binary classification of the above characteristics have been
used to plot statistically significant associations.La composition taxonomique et une analyse de quatre caracteristiques
ecologiques des 46 especes endemiques rencontrees dans le bassin inferieur
du Duero (CW de Ia Peninsula lberique) ont ete realisees. Une analyse
comparative des resultats montre que cette !lore endemique ne correspond pas
aux schemas generaux observes precedemment dans d'autres flares. Les
formes biologiques predominantes son! les Mmicryptophytes (43%) et les chamephytes
(22%). En ce qui conceme le mode de dispersion des diaspores, 54%
des especes endemiques son! depourvues de tout aspect adaptatif particulier.
89% des especes endemiques son! pollinisees par des animaux (essentiellement
des insectes) et une seule espece est dioique. En se basant sur une classification
binaire, les caracteristiques precedentes ont eta utilisees pour
representer graphiquement les associations statistiquement significatives.We would like to thank Dr. Tyteca for the translation of the French texts. This research was
supported by a grant from Castilla y Leon Autonomous Government (SA 037/02)info:eu-repo/semantics/publishedVersio
