Abstract ID: 3.12642 | Accepted as Talk | Requested as: Talk | TBA | TBA

The implementation of adaptive management practices, such as thinning and clearing of pine and oak stands, promotes the protection and enhancement of the ecosystem services they provide. These management practices alter soil properties by contributing plant residues, affecting moisture and temperature, altering the activity of decomposing microorganisms, and modifying greenhouse gas (GHG) exchanges between the soil and the atmosphere. Knowing that two-thirds of the total amount of carbon in the biosphere is stored in the soil, it is of vital importance to analyze and understand the processes that contribute to its storage or release into the atmosphere and predict how these management practices modify its behavior. In this study, CO₂ fluxes were measured in oak forests, holm oak forests, and reforested pine stands in Sierra Nevada under two microhabitats: soil covered with thinning residues and bare soil. The measurements, conducted bimonthly between March 2022 and November 2024 using a gas analyzer and portable chamber, were complemented with satellite images (Landsat-8-9 and Sentinel-2), extracting information on various vegetation indices, moisture, albedo, and temperature to attempt to relate them to carbon fluxes along with other meteorological variables measured in the field. As a general result, we highlight that the soil in these forest ecosystems acts as a CO₂ emitter, with the flux varying according to the type of treatment. Environmental variables such as precipitation and temperature are key to predicting soil CO₂ emissions, along with soil temperature values derived from the Thermal index.