Analisi della qualità biologica del suolo attraverso il metodo QBS-ar in alcuni ambienti forestali della provincia di Rieti
Author(s)
Fiordigigli, Rachele
Date Issued
March 1, 2009
Type
Doctoral Thesis
Abstract
The use of bioindicators centred on edafic (microartropidi ) in the forest soil quality monitoring is very promising, because they cover a broad ecologic and dimensional spectrum of the (pedofauna). The QBS-ar is a recently developed
indicator based on the criterion of the biological forms having a double intent:
- giving an evaluation of the adaptability to the hypogean life;
- overcoming the difficulties linked to the identification at species level.
The edafic settlements considered in this study come from beechwoods (Fagus sylvatica L.) and mixed woods, typical of the italian central Appennine landscape. During the years from 2006 to 2008, three soil samples(10 cm x 10 cm x 10 cm) were collected for each area studied, in order to reduce possible differences due to the anisotropic distribution of the organisms. The results showed complex and well-structured (microartropidi) communities, that are
mostly represented by Acarus and (Collemboli). Many other groups in high density were studied, like Pseudoscorpion normally linked to the litter. The presence of (Pauropodi) and (Sinfili), which are particularly sensitive to the
instability soil conditions, and the QBS-ar values indicator, with maximum peaks of 272, show that the soils studied are characterized by an excellent biological quality, typical of those woods areas having an advanced and high
maturation and preservation status.
The analysis of the collected data didn't show any important difference between the different sites studied both for the QBS-max value and respect to the quality of the zoologic groups found; however, the results followed the seasonal course and consequently the thermo-pluviometric variations.
As a result, the soils studied are in good conditions. These results, however, are
preliminary data, which should be completed and deepened with further monitoring during the following years and it would be desirable, on one hand, to repeat the evaluation each month using the QBS method ( in order to analize
better the results as the seasons change) and on the other hand to complete it with chemical-physical analysis.
Additional information
Dottorato di ricerca in Scienze e tecnologie per la gestione forestale e ambientale
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