Artículos de revistas
Dendrochronological potential of Prumnopitys andina (Podocarpaceae) at the southern limit of its range in the Chilean Andes
Fecha
2021-02Registro en:
Claudio Álvarez, Carlos Le Quesne, Moisés Rojas-Badilla, Vicente Rozas & Álvaro González-Reyes (2021) Dendrochronological potential of Prumnopitys andina (Podocarpaceae) at the southern limit of its range in the Chilean Andes, New Zealand Journal of Botany, DOI: 10.1080/0028825X.2021.1877158
0028-825X
eISSN: 1175-8643
WOS:000616244900001
10.1080/0028825X.2021.1877158
Autor
Alvarez, Claudio
Le Quesne, Carlos
Rojas-Badilla, Moisés
Rozas, Vicente
Gonzalez-Reyes, Alvaro [Chile. Universidad Mayor. Facultad de Ciencias. Centro de Observación de la Tierra]
Institución
Resumen
Prumnopitys andina is a South American podocarp with a restricted distribution in southern Andean temperate forests, and is severely threatened due to habitat loss. Despite much dendrochronological work on other temperate South American conifers, little is known about the dendrochronological potential of P. andina. Here, we examine the main features of P. andina tree rings and evaluate the potential of this species for yielding tree-ring chronologies sensitive to climatic variability. In a population at the southern range limit of the species, we collected tree cores and cross-section samples of P. andina for analyses following standard dendrochronological techniques. 76 tree-ring series from 45 trees were examined, 32 (42%) of which were successfully cross-dated and included in a chronology. We found that the species forms well-defined tree rings with distinct boundaries delimiting annual growth. The chronology began in 1778, with notable periods of suppression and release occurring in the late nineteenth and early twentieth centuries, respectively. The chronology showed a high inter-series correlation value of 0.51, suggesting a strong common signal among trees. December to January precipitation showed a positive relationship with radial growth. Conversely, maximum and mean temperature showed negative relationships with radial growth during the austral summer and autumn. These significant relationships of climate variables with radial growth of P. andina indicate that tree-ring series of this species are suitable for dendroclimatological studies.