Brazilian Journal of Enviromnent
Open Access Journal
CiteScore
0.5
Indexada na
SCOPUS
QUALIS
B2
2021-2024
quadriênio
Open Access Journal
0.5
Indexada na
SCOPUS
B2
2021-2024
quadriênio
This study compared atmospheric CO₂ concentrations during the dry and rainy seasons in two areas of the Miombo forest in Huambo province: Chipipa (degraded) and Chianga (conserved). In each area, three plots (10 m radius) with twenty measurement points were selected. CO₂ was monitored twice daily (morning and afternoon) for 8 days using the SR-510A detector, between August 14 and September 8 (dry season), and December 2 to 21, 2024 (rainy season). Statistical analysis showed significant differences between morning and afternoon CO₂ levels in both areas. In the dry season, Chianga’s Plots 1 and 2 had 403.32 ppm and 399.02 ppm, respectively, and Chipipa’s Plot 1 had 430.6 ppm. In the rainy season, Chianga’s Plots 1 and 2 showed 413.73 ppm and 413.24 ppm, and Chipipa’s Plot 1 had 415.6 ppm. Other plots had no significant differences. At the area level, CO₂ was significantly higher in Chipipa (median = 426 ppm) than in Chianga (median = 397 ppm) during the dry season. No significant differences were observed in the rainy season. However, in the rainy season, no significant difference was found between the areas. Additionally, CO2 concentrations were consistently higher in the dry season compared to the rainy season. These findings show that the degraded area consistently exhibited high levels of CO2, particularly during the dry season. however, during rainy season, no significant differences in CO2 levels were observed between the two areas, suggesting that rainfall may mitigate the effects of degradation on atmospheric CO2 dynamics.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2026 Vicente Kimbamba, Godson R.E.E Ana, Lu´ís Manuel Miapia