Indagini dendroecologiche e risposte di crescita del pino domestico (Pinus pinea L.) ai recenti cambiamenti climatici in ambiente costiero mediterraneo
Author(s)
Mazza, Gianluigi
Date Issued
April 26, 2012
Type
Doctoral Thesis
Abstract
Context & Aims This research was carried out in stone pine (Pinus pinea L.) stands of the Italian
coastline, in order to analyse the tree-growth variability at spatial and temporal scale, evaluate the
radial growth response to climatic conditions over the last century, and investigate significant
cyclic patterns in the tree-ring chronologies.
Methods The clustering techniques were used to identify groups with similar growth patterns
among the standardized tree-ring chronologies. The growth rate during the last century was
analysed using the “age band decomposition – ABD” method. Climate/growth relationships and
their stationarity over time were computed by means of correlation and moving correlation
functions. To investigate significant cyclicities the spectral analysis techniques were applied.
Results The main grouping of trees with the same variability was related to site effects. The
decrease in radial tree-growth rate, observed mainly from the second half of twentieth century,
was correlated with the significant decline in precipitation. Tree-growth showed a higher
sensitivity to the previous November monthly precipitation. Since the 1960s the summer
temperatures were negatively correlated and showed a significant increase.
Conclusion The results highlighted the influence of precipitation on tree-growth and the effects
of site to define the main growth patterns. These findings can help to identify the sustainable
management tools to improve the stand stability and efficiency in coastal environments of the
Mediterranean basin.
Additional information
Dottorato di ricerca in Ecologia forestale
File(s)![Thumbnail Image]()
Name
gmazza_tesid.pdf
Size
6.21 MB
Format
Adobe PDF
Checksum (MD5)
776322e9c9248e27d8ccf6a4e8c52e90