Éstimation du stock de carbone organique dans l'écosystème des iliçaies du Moyen Atlas marocain

• Published in: Revue Nature et Technologie (En ligne) no. 11; p. 6
• Main Authors: Boulmane, Mohamed, Santa-Regina, Ignacio, Khia, Abderrahim, Oubrahim, Hayat
• Format: Journal Article
• Language: French
• Published: Chlef Hassiba Benbouali University of Chlef/Université Hassiba Benbouali de Chlef 01-06-2014
• Subjects: Biomass; Carbon; Ecosystems; Litter; Soils
• ISSN: 1112-9778; 2437-0312

This study was conducted in Quercus ilex Moroccan ecosystem of Middle Atlas, whose objective consists the determinination of organic carbon stock in the different compartments (soil, litter and biomass). The best correlations were obtained by allometric regressions for each fraction of the tree biomass between all stands. The total carbomass of aboveground stands (Quercus ilex and cedar (Cedrus atlatica)) varies between 50 and 155 tC.ha^sup -1^ respectively for Reggada and Ajdir ; more than 40 % of carbon is sequestered in the cedar forest to Dayat Hachlaf and Ajdir. Par contre, the soil organic carbon stock (SOCS) varies from 52 tC.ha^sup -1^ for Reggada to 141 tC.ha^sup -1^ for Ajdir. More than 75 % of SOCS is stored in the first 30 centimeters of soil. The correlative approach shows that SOCS are strongly dependent on the soil depth in the different forest stands. They decreased following an exponential curve in all stands. The litter organic carbon stock (LCS) varies from 3.5 tC.ha^sup -1^ for Reggada to 14.3 tC.ha^sup -1^ for Ajdir. The stock of total organic carbon soil (SOCS + LCS) is between 40 and 55 % of the total organic carbon stock in the Quercus ilex ecosystems of Middle Atlas. The stock of total organic carbon (soil, litter and biomass) in the forest ecosystems studied varied among 106 tC.ha^sup -1^ in Reggada to 310 tC.ha^sup -1^ in Ajdir.This stock increase linearly with the total basal area of the stands.