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Intra-annual density fluctuations (IADFs) inPinus nigra(J. F. Arnold) at high-elevation in the central Apennines (Italy)

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PIERMATTEI Alma CAMPELO Filipe BÜNTGEN Ulf CRIVELLARO Alan GARBARINO Matteo URBINATI Carlo

Rok publikování 2020
Druh Článek v odborném periodiku
Časopis / Zdroj Trees - Structure and Function
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://doi.org/10.1007/s00468-020-01956-1
Doi http://dx.doi.org/10.1007/s00468-020-01956-1
Klíčová slova European black pine; Anthropogenic forest limit; Pioneer vs planted; Standardization; Weibull and Chapman functions
Popis Although wood anatomical features can provide yearly resolved climatic information at sub-seasonal resolution, the occurrence of intra-annual density fluctuations (IADFs) might be triggered by several abiotic factors under different ecological settings. Here, we use information on cambial age and tree-ring width to standardize the frequency of IADFs in European black pines from three different mountain slopes in the central Apennines (Italy). At each site, we sampled isolated 15-30-year pioneer pines above the forest limit, as well as close-grown 40-60-year planted pines at the forest limit. Mainly restricted to the latewood of both pioneer and planted trees, the occurrence of IADFs reveals a significant positive relationship with cambial age and ring width. Although the standardized IADFs are well synchronized between the planted and pioneer pines, the frequency of IADFs in narrow rings was higher in the pioneer pines. Drought conditions in July and August are responsible for the highest IADFs frequency in planted and pioneer pines, respectively. Our study underlines the value of IADFs to obtain a more nuanced understanding of the climatic drivers of wood formation at the intra-annual scale.

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