Padrão espectral de plantas de Umburana-de-Cambão Commiphora leptophloeos (Mart.) J. B. Gillett em uma área de reserva no município de Senador Rui Palmeira/AL, Brasil

Abstract

ABSTRACT: Umburana (Commiphora leptophloeos (Mart.) J. B. Gillett) is a species that has wood, forage, ornamental, meliferous and medicinal value. The aim of this study was to identify the spectral pattern of umburana (Commiphora leptophloeos (Mart.) JB Gillett) through geotechnologies. The evaluation of changes in patterns was used the Normalized Difference Vegetation Index (NDVI) and the Moisture Stress Index - MSI in a preserved vegetation area at Municipality of Senador Rui Palmeira, state of Alagoas, Brazil. The research was carried out on a property located at Sítio Queimada Grande, rural country of Senador Rui Palmeira, AL. The area was mapped using images. The entire area was covered, with the identification of the Umburanas-de-Cambão found and with the use of GPS, their georeferencing. The determination of NDVI and MSI was obtained through Google Earth Engine, images from the Sentinel 2 Satellite. In the pedological coverage, 88.25% of the umburanas occurred in Luvissolos Crômicos Órticos Vertissolicos.  As for NDVI, the average values found during the year of the study ranged from 3 to 7. As for NDVI, the average values found during the year of the study ranged from 3 to 7. Of the 127 umburanas identified, 117 are in the preservation area and only 10 occur outside it. NDVI was variable, reaching peaks in the months of greatest amount of rain, between June and July.  As for the MSI averages, there was variation 2 and just over 12 throughout the year, with peaks at 100 days and between 150 and 220 days. The NDVI and SMI presented higher values in the month of February with indexes of 0.3 and 4.5, respectively. Based on the observed correlation between NDVI and temperature, the main mechanism that controls the photosynthetic activity of umburanas is temperature.

Keywords: Preservation, Caatinga, NDVI.