c6.5.35 – Natural regeneration on artificial gaps in silver fir stands in Central and Southern Apennines

Mercurio I* (1), Cutini A (2), Mercurio R (1)

(1) Dep. of Agriculture and Forest Systems Management, Feo di Vito, Reggio Calabria; (2) Experimental Institute for Silviculture, Arezzo
Collocazione: c6.5.35 – Tipo Comunicazione: Presentazione orale
6° Congresso SISEF *
Sessione 5: “Poster: “Selvicoltura, pianificazione, paesaggio”” *

Contatto: Roberto Mercurio (rmercurio@unirc.it)

Abstract: The conversion of pure conifer plantations into stands with heterogeneous structure and composition is a current silvicultural challenge in Italy. The purposes of this study are: I) to evaluate if the creation of gaps is an appropriate way to transform homogeneous man-made stands of silver fir (Abies alba Mill.) into naturally regenerated stands; II) to analyse the influence of micro-environmental conditions in gaps of different size on the recruitment and establishment of natural regeneration of forest tree species. The study areas were located in artificial silver fir stands of Serra San Bruno Forests in the Calabrian Apennine and in silver fir monocultures of Camaldoli and Campigna Forests in central Apennine. Small (D/H: 0.50) and medium (D/H: 0.75) gaps were created in these stands. Differences in PAR transmittance, soil moisture and seedlings density were analyzed according to gap size and within-gap position to evaluate the effects of micro-environmental conditions on the recruitment and establishment of natural regeneration of forest tree species, three years after gaps opening. The results about silver fir stands of Serra San Bruno showed a good seedlings density in the central-southern positions in small gaps where PAR was lower, in medium gaps high values were recorded also in the eastern positions. On the contrary, in Camaldoli and Campigna Forests, seedlings density was very low both inside the small gaps and inside medium ones. Four main possible causes were take in consideration to explain these results: intraspecific diversity between the central-northern and southern Abies alba populations, differences between macro and micro-environmental conditions, differences between the age of the stands and the role of wild ungulates.

Citazione: Mercurio I , Cutini A , Mercurio R (2007). Natural regeneration on artificial gaps in silver fir stands in Central and Southern Apennines . 6° Congresso Nazionale SISEF, Arezzo, 25 – 27 Set 2007, Contributo no. #c6.5.35