(1962). Exemple d'étude dendrologique en relation avec la climatologie du
Capcir et de la Cerdagne. Thèse de 3ème cycle, Biogéographie.
Faculté des Sciences de Toulouse. 149 pp, 5 photos, 2 maps, 72
A dendroclimatological study was carried out in the French Pyrenees on two Scotch Pine forests located in « La Matte des Angles » in the Capcir region, and near « Font-Romeu » in the Cerdagne. They are both located on siliceous bedrocks.
The first one is a pure 300 ha. Pinus sylvestris stand, whereas the second one is a mixed Scotch pine forest with Pinus uncinata.
Ring-widths were measured from 160 to 200 years and analysed with classical meteorological data. (Precipitation were recorded in Mont-Louis since 1872).
It appears that minimum and spring temperatures are correlated with small rings. Moreover, the use of rainfall and temperature data at the same time provide better results. The possible influence on sun spot on tree-rings is also discussed.
The mean sensitivities of the tree-ring widths equal MS = 0.16 in
the Matemale forest, and MS = 0.12 in the Font-Romeu stand.
Tree-ring widths and climate relationships were calculated in the 2 stands
with the linear correlation method ( + sign means positive linear correlation
during that month).