O BIOMA CAATINGA E SEU POTENCIAL NA REGULAÇÃO DA TEMPERATURA E DO FLUXO DE CARBONO ATMOSFÉRICO

Abstract

The present research aims to carry out an elevation and slope survey, as well as the use and coverage of the municipality of Frei Martinho/PB, seeking to understand the potential of vegetation in regulating temperature and local atmospheric carbon flow. The methodological procedures were followed in three stages: 1) use of the Digital Elevation Model (MDE); 2) application of vegetation spectral indices; and 3) classification and spatialization of the relevance of ecosystem services. It was observed that the altimetric data varied between 346 and 700m and the slope varied from flat to steep (0% to > 70%). Five classes of land use and cover were identified, namely: water body (0.1%), exposed soil/urban area (5.8%), sparse vegetation (49.9%), semi-dense vegetation (18 .1%) and dense vegetation (26.1%), totaling 238.7 km². In terms of the spatialization of services, it was noticed that carbon sequestration demonstrated a high to very high potential relevance of more than 40% in the area, while temperature mitigation presented only 25.3% in this same range. In addition, the data revealed that areas with high altitudes and strong undulating to steep relief, whose vegetation demonstrated greater conservation, indicated that they concentrated the greatest supply capacity in both services.