engleski

Ozone impact on Mediterranean forest ecosystems of Croatia

Ozone, one of the air pollutants, poses a great risk to a sensitive ecosystem such as the Mediterranean forest ecosystem. According to the European Environment Agency (EEA), the Mediterranean region of Croatia belongs to the group with very high ozone concentrations and potential threat to the forest ecosystems. Solar radiation and chemical reaction with oxides of nitrogen and/or volatile organic compounds result in ozone which may affect functionality of these ecosystems. Four plots in two regions of Croatian Mediterranean were sampled: two in Istria and two in the Dalmatia region. Measurements were conducted from April to September in 2018. Ogawa passive samplers were used for measuring ozone concentrations in ecosystems of holm oak and pubescent oak in the Istria region likewise in the Dalmatia region, Aleppo pine and black pine, representing the most important and the most common species in Croatian Mediterranean. After exposure, filters were brought in laboratory and analysed by ion chromatography. Nitrate concentrations were calculated to the amount of ozone collected on the plots. Higher average concentrations were found in Istria than in Dalmatia. Symptoms pointing on oxidative stress caused by high ozone concentrations were found in Istrian plot in forest ecosystem of pubescent oak.

Mediterranean region ; ozone ; holm oak ; pubescent oak ; black pine ; Aleppo pine

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