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Key messageIn rupestrian savannas in southeastern BrazilClusia arrudaePlanchon & Trianain the dry season performed CAM-cycling with very little gas exchange in the early morning followed by a long depression during the rest of the day. CAM-cycling is considered as a survival strategy under drought and the productivity of the plant which is quite abundant must rely on performance of C...
Key messagePlasticity of ecophysiological acclimation determines habitat occupation of species ofClusiain an Atlantic rainforest of Brazil. Ecophysiological performance is not sufficient for explaining widespread versus locally restricted distribution of species among physiognomic sub-sites within the forest. Abstract Four species of Clusia were studied that have distinct habitat distribution...
Andira legalis Vell. Toledo (Leguminosae, Papilionoideae) is a deciduous tree of the coastal vegetation of Brazil. It was studied in the restinga ecosystems of the Atlantic coast along a moisture gradient of open dry restinga (annual precipitation 800 mm, water table high at 0.9–1.2 m but partially saline), intermediate restinga (annual precipitation 1164 mm, water table low at 2–3 m) and wet restinga...
Three species of Clusia, namely two CAM-species (C. hilariana Schlecht. and C. fluminensis Planch. et Triana) and a C3-species (C. parviflora Saldanha et Engl.) were studied in different plant communities at the periphery of the Atlantic Forest in the state of Rio de Janeiro, Brazil. The sites chosen were an inselberg (C. parviflora), a range of wet restinga – dry restinga – semideciduous dry forest...
Three legume tree species (Fabaceae) occurring abundantly in a semi-deciduous tropical dry forest of the Atlantic forest complex in southeastern Brazil were subjected to a comparative ecophysiological study at the end of the dry season/beginning of the wet season. The trees chosen were morphologically very similar: Caesalpinia echinata Lam. and Caesalpinia ferrea Mart. ex. Tul., both 10–20 m of height,...
Araucaria angustifolia (Bertol.) Kuntze is an indigenous conifer restricted to the southern region of South America. In this on-site field study, we provide a detailed description of the nitrogen compounds and sugars allocated to the different plant compartments in tall adult trees, young trees about 2–3 m tall and small seedlings at its northernmost occurrence in the mountains of Itatiaia (20°25′S;...
The seasonal savannas (cerrados) of Central Brazil are characterized by a large diversity of evergreen and deciduous trees, which do not show a clear differentiation in terms of active rooting depth. Irrespective of the depth of the root system, expansion of new foliage in deciduous species occurs at the end of the dry season. In this study, we examined a suite of leaf traits related to C assimilation,...
Roupala montana is an evergreen species widespread in the seasonal savannas of the central plains of Brazil. I examined the degree of coupling of photosynthetic gas-exchange characteristics, water relations and growth responses of R. montana with regard to seasonal changes in soil water availability. Despite a rainless period of over three months soil water potential at 60 cm depth reached values...
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