Abstract
The model described in this article was simulated in order to provide the best recommendations related to the management of dry forest carbon stock. The methodology of this study is based to the dynamic growth model (CO2fix V3.1). The model was developed to calculate and estimate dry forest carbon fluxes and stocks. In this study the model was utilized for estimating how much carbon is sequestered in Diospyros celebica, Eucalyptus urophylla, Tectona grandis and mixed woods and soils. The results of this study show that in the 200 years simulated, total C stock had a tendency of increase. All of modules showed very similar patterns from 0 years to 40 years, except for bioenergy. Biomass had the highest value of carbon stock around 236.9 MGCHA–1, carbon soil around 292.7 MGCHA–1, product carbon storage around 226.8 MGCHA–1 and bioenergy carbon storage presented a sustained increase and reached 522.3 MGCHA–1 in the end of the simulated period. The contribution of the tree species component to total carbon stock was significantly positively correlated (R2 = 0.634–0.882, P < 0.05) with the time simulated in years, except foliage of Diospyros celebica (R2 = 0.301), foliage of Tectona grandis (R2 = 0.162) and foliage of Eucalipthus urophylla (R2 = 0.256). However, future studies should involve detailed examination on below-ground fraction and the effects of humans on global ecosystems.
Highlights
About 40% of the earth’s tropical and subtropical landmass is dominated by open or closed forest
Biomass had the highest value at ages 40, 80, 120, 160 and 200 years with 236.89 MGCHA–1, soil at ages 40, 80, 120, 160, 200 years with 235.34, 259.05, 272.92, 283.56, 292.67 MGCHA–1, product at ages 40, 80, 120, 160, 200 with 140.39, 177.91, 200.37, 215.64, 226.75 MGCHA–1 and bioenergy C storage presented a sustained increase and reached 522.25 MGCHA–1 in the end of the simulated period (Fig. 2)
Total carbon stock was increased until the end of the period of simulation
Summary
About 40% of the earth’s tropical and subtropical landmass is dominated by open or closed forest. Tropical dry forest is the most widely distributed landcover type in the tropics. As the rate of land-use/land-cover change from forest to pasture or agriculture accelerates worldwide, it is becoming increasingly important to quantify the ecosystem biomass and carbon (Jaramillo et al, 2003). Tropical forests are disappearing at an alarming rate of 13.5 million hectare per year globally (Kobayashi, 2004). Disturbance in tropical forests includes individual tree processes, landscape level processes, and regional and climate influences. These processes and influences function on different temporal and spatial scales and are variable in the impact they have on tropical forests (Frolking et al, 2009)
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