The dynamics of primary growth in woody species from rain and transitional forests of Argentinean north Patagonia

MARIANA SALGADO; CRISTIAN TORRES; AMARU MAGNIN; MARINA GEREA; JAVIER GROSFELD; JAVIER PUNTIERI; MARINA STECCONI

BOSQUE (VALDIVIA)

UNIV AUSTRAL CHILE

Lugar: Valdivia; Año: 2020 vol. 41 p. 183 - 192

0304-8799

Rainforests (RF) and transitional forests (TF) of Argentinean north Patagonia develop under such different climatic conditions thatkey aspects of seasonal growth may be assumed to differ among the woody plants that characterize these forests. This study wasaimed at evaluating primary growth dynamics in tree species typical of RF and TF. Two common-garden essays were performed inBariloche, Argentina, one with RF species and the other with TF species. The times of extension initiation and end, the duration ofthe extension period and the relative and absolute extension rates (RER and AER, respectively) were registered for each species. Therelation between AER and air temperature was compared between species. In general, RF species had less variable times of extensioninitiation, extension end and time of maximum RER, and longer-lasting extension than TF species. Among RF species, extensionduration was the longest for Caldcluvia paniculata (26.9 weeks, on average) and the shortest for Luma apiculata (18.9 weeks). AmongTF species, the longest and shortest extension durations corresponded, respectively, to Diostea juncea (18.2 weeks) and Maytenusboaria (13.0 weeks). The extension rates of RF species tended to be more related to temperature than those of TF species. This studyprovides some evidence that endogenous control of growth dynamics would be tighter in