Lima J. R. D. auteur aut IRD Souza R. M. S. auteur aut IRD dos Santos E. S. auteur aut IRD de Souza E. S. auteur aut IRD Oliveira J. E. D. auteur aut IRD de Medeiros E. V. auteur aut IRD Pessoa L. G. M. auteur aut IRD Antonino A. C. D. auteur aut IRD Hammecker Claude auteur aut IRD text journalArticle eng text/pdf reformatted digital access Soil respiration represents the largest flux of CO2 emission from terrestrial ecosystems, being affected by land-use changes and soil properties. There are few studies investigating the response of soil respiration to land-use changes in the Caatinga biome. This study aimed to measure soil respiration from Caatinga vegetation and degraded pasture, to verify the effect of land-use changes on soil respiration. Measurements of soil respiration were performed using the infrared gas analyzer method over nine months (in rainy and dry seasons), in Caatinga and degraded pasture in the semi-arid region of Pernambuco. The soil moisture, soil temperature, soil organic carbon (SOC), Normalized Difference Vegetation Index (NDVI), and climatic variables were also measured. Soil organic carbon and NDVI were higher in Caatinga than in degraded pasture, while the inverse occurred with soil temperature. The soil respiration showed a clear seasonal variation, with the highest values occurring in the wet season, being positively correlated with soil moisture and negatively with soil temperature. Soil respiration was significantly higher in the Caatinga (8.0 ton ha(-1) yr(-1) of C) than in degraded pasture (3.7 ton ha(-1) yr(-1) of C). These higher values of soil respiration in Caatinga were due to lower soil temperature and higher SOC, and can be seen as indicators of good environmental quality. specialized Caatinga degraded pasture soil moisture soil temperature soil organic carbon BRESIL ZONE SEMIARIDE 068 082 44 e0200092 [19 p.] 2020 0100-0683 https://www.documentation.ird.fr/hor/fdi:010080494 10.36783/18069657rbcs20200092 0100-0683 [F B010080494] https://www.documentation.ird.fr/hor/fdi:010080494 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers21-01/010080494.pdf IRD - Base Horizon / Pleins textes 2021-02-08 2021-02-10 fdi:010080494 fre