c3.5.1 – Identification and quantification of ozone-like foliar symptoms at the experimental site of the TRASFORM project in Umbria, central Italy.

Cozzi A (1), Ferretti M (2)*, Grohmann F (2), Savini P (2)

(1) LINNAEA Ambiente srl, Firenze, (2) Regione dell’Umbria, Ufficio Foreste ed Economia Montana, Perugia
Collocazione: c3.5.1 – Tipo Comunicazione: Presentazione orale
3° Congresso SISEF *
Sessione 5: “Inquinamento e Foreste” *

Contatto: Marco Ferretti (m.ferretti@linnaea.org)

Abstract: ’Bioindication’ is one of the 4 sections of the regional project TRASFORM (acronym of the Italian ’TRAttamenti Selvicolturali in FOReste degradate per il loro recupero e Mantenimentò) managed by the Regione dell’Umbria. The section is devoted to identify, describe and quantify ozone foliar symptoms at the experimental plots of the TRASFORM project, subjected to summer weekly mean ozone concentrations varying between 30 and 50 ppb. In 1999, a survey was undertaken to identify and describe foliar symptoms: several species, including Ailanthus altissima, Clematis vitalba, Cornus sanguinea, Euonymus eurapaeus, Fraxinus ornus, Lonicera sp., were found symptomatic. At the beginning of the September 2000, a more formal investigation was carried out to quantify symptoms attributable to ozone on current year sprouts of Fraxinus ornus, the most frequent sensitive species founded at the experimental site of the TRASFORM project. For each of the 6 TRASFORM plots, 3-10 subplots (10×10 m each – the same used for plant diversity assessment) were selected. For each subplot, all the existing Fraxinus ornus stumps were considered and – for each stump – the highest five sprouts (>30 cm) were assessed. Symptoms were quantified for each sprout according to the modified Horsfall-Barret system and than calcualted for individual stumps, sub-plots and plots. Marked within-stump, within-subplot and within-plot variability was obvious.

Citazione: Cozzi A , Ferretti M , Grohmann F , Savini P (2001). Identification and quantification of ozone-like foliar symptoms at the experimental site of the TRASFORM project in Umbria, central Italy. . 3° Congresso Nazionale SISEF, Viterbo, 15 – 18 Ott 2001, Contributo no. #c3.5.1