TY - JOUR
T1 - Climate and growth of Podocarpus salignus in Valdivia, Chile
AU - Rozas, Vicente
AU - Le Quesne, Carlos
AU - Muñoz, Ariel
AU - Puchi, Paulina
N1 - Funding Information:
We gratefully acknowledge the valuable collaboration of Robert Br?mmer for providing the climatic data from the meteorological station of Isla Teja, Valdivia, and of Paul Sheppard for English language assistance and useful suggestions on an earlier draft of this paper. This research was founded by the projects FONDECYT 1121106 and FONDECYT 1151427. The stay of V. Rozas in Universidad Austral de Chile, Valdivia, was founded by CONICYT through the Concurso Nacional "Atracci?n de Capital Humano Avanzado del Extranjero, Modalidad Estad?as Cortas (MEC)" (code 80130061).
Publisher Copyright:
© 2016 Polska Akademia Nauk. All rights reserved.
PY - 2016
Y1 - 2016
N2 - Little dendroclimatic research has been conducted on species of Podocarpus, in response to inherent difficulties associated with tree-ring differentiation and cross-dating. We sampled complete stem cross sections from a plantation of Podocarpus salignus trees in Valdivia, Chile, near the southern edge of the species’ range. We measured earlywood, latewood, and total ring widths avoiding ring wedging, and we calculated the corresponding chronologies. The relationship of these chronologies with maximum temperature, precipitation, and sea level pressure was addressed using correlation and redundancy analyses. All chronologies showed a similar response to climate that was consistent with the cloudy, rainy, and temperate conditions of the study area. That is, warm and dry conditions during previous late springs were beneficial, while warm and rainy winters under low atmospheric pressures were detrimental for growth. The observed climatic responses are in contrast to those of conifers from mountainous areas of southern South America. Limitation of carbohydrates available for growth in the following active season was a possible cause for the observed responses to climate. That is, high winter temperatures may deplete stored carbohydrates by increasing respiration, and a high degree of cloud cover reduces the radiation received by the trees in the active season, which may hamper photosynthesis. Our work highlights the dendroclimatological value of Podocarpus salignus to investigate the influence of climatic variation on tree growth and forest productivity.
AB - Little dendroclimatic research has been conducted on species of Podocarpus, in response to inherent difficulties associated with tree-ring differentiation and cross-dating. We sampled complete stem cross sections from a plantation of Podocarpus salignus trees in Valdivia, Chile, near the southern edge of the species’ range. We measured earlywood, latewood, and total ring widths avoiding ring wedging, and we calculated the corresponding chronologies. The relationship of these chronologies with maximum temperature, precipitation, and sea level pressure was addressed using correlation and redundancy analyses. All chronologies showed a similar response to climate that was consistent with the cloudy, rainy, and temperate conditions of the study area. That is, warm and dry conditions during previous late springs were beneficial, while warm and rainy winters under low atmospheric pressures were detrimental for growth. The observed climatic responses are in contrast to those of conifers from mountainous areas of southern South America. Limitation of carbohydrates available for growth in the following active season was a possible cause for the observed responses to climate. That is, high winter temperatures may deplete stored carbohydrates by increasing respiration, and a high degree of cloud cover reduces the radiation received by the trees in the active season, which may hamper photosynthesis. Our work highlights the dendroclimatological value of Podocarpus salignus to investigate the influence of climatic variation on tree growth and forest productivity.
KW - Dendrochronology
KW - Precipitation
KW - Sea level pressure
KW - Southern South America
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=84990853373&partnerID=8YFLogxK
U2 - 10.12657/denbio.076.001
DO - 10.12657/denbio.076.001
M3 - Article
AN - SCOPUS:84990853373
VL - 76
SP - 3
EP - 11
JO - Dendrobiology
JF - Dendrobiology
SN - 1641-1307
ER -