Loss of grasslands is indicated as one of the primary causes of terrestrial biodiversity impoverishment in the Mediterranean Basin. In Italy this process is realized through the abandonment of traditional agro-pastoral activities with consequent drastic decline of semi-natural grasslands. The success of agro-pastoral impact on the grasslands’ biodiversity and functioning is linked to the tight relationship between the presence of grazing animals, soil edaphic conditions, light availability and C and N cycling. It could be hypothesized that grazing through diversification of ecological niches makes the system also more climate-resilient. However, little is known on management-climate interactions.
CAROLINA project aims to explore the potentiality of the grassland’s extensive management executed at different climate conditions in terms of provision of key ecosystem services, such as biodiversity conservation and C sequestration capacity, and to assess the impact on ecosystem resilience to climate change induced by land-use variation. CAROLINA focuses on semi-natural grasslands subjected to extensive grazing and surrounded territories located in Mountain and Mediterranean climatic zones of Italy.
A selection of semi-natural managed grasslands along a climatic gradient will be subjected to an on site climate manipulation experiment according to international drought protocol. Evaluation of plant community changes and functional indicators at the plant and soil level will permit to judge on the grassland’s capacity to withstand climate change on a short-term and long-term basis (up to 4 years) and to predict consequences to C sequestration, biodiversity conservation, and to soil health status.
Response of these areas to climate change is addressed only with remote tools by satellite time series, analyzing NDVI recovery trends in relation to climatically critical years and land use. Land use issue is considered through the cronosequence approach.
The project is supported by the European Union – Next Generation EU and the Italian Ministry of University and Research through PRIN 2022 PNRR grant