Boletín de la Sociedad Argentina de Botánica
SANTIAGO JOSÉ ELÍAS VELAZCO; HÉCTOR ALEJANDRO KELLER Y FRANKLIN GALVÃO
SMALL BUT IMPORTANT: THE WOODY VEGETATION COMMUNITIES ON THE SANDSTONE OUTCROPS OF TEYÚ CUARÉ (MISIONES, ARGENTINA)
Editor Guillermo Funes
Summary: Rock outcrops are commonly harsh environments that maintain important components of biodiversity because they are inhabited by endemic or relictual species. We aimed to study the diversity and structure of the woody plant of rupestrian vegetation located in the San Ignacio department (Misiones, Argentina), and evaluate the beta diversity with respect to other neighbor vegetation formation (i.e. forest and savanna). We found 32 species, most of them were arboreal nonetheless of small size. Qualea cordata (Mart.) Spreng., Monvillea euchlora Backeb., Ocotea lancifolia (Schott) Mez and Myrciaria delicatula (DC.) O.Berg were the most structurally important. Rupestrian vegetation showed an average woody diversity in comparison to forest and savanna formation, with high beta diversity mainly structured by richness difference. These environments have a high-priority for conservation because their singular plant communities inhabit specific edaphic and geomorphic conditions, occurring only in a restricted geographical range.
Keywords: rock outcrops, phytosociology, rupestrian vegetation, endemic species