Concentracion de carbono den diferentes tipos de vegetacion de la Sierra Norte de Oaxaca | Carbon concentration in different vegetation types in the Northern Oaxaca Sierra
2005
Figueroa-Navarro, C. | Etchevers-Barra, J.D. | Velazquez-Martinez, A. | Acosta-Mireles, M.
Carbon concentration and accumulation in the main components of the mountain rainforest (trees, shrubs, weeds, and litter) and in permanent agricultural systems located on hilly landscapes have been scarcely studied in Mexico and elsewhere. The objective of the present study was to determine carbon concentration in main forest components in different vegetation types liquidambar forest (Liquidambar sp.), alder (Alnus sp.) and oak forest (Quercus sp.), coffee plantations (Coffea sp.), acahuales (vegetation related to slash and burn practices), and native grasslands in the Sierra of Northern Oaxaca, Mexico, and to perform a comparison among them. Bole wood, crown (branches and leaves), shrubs plus herbs, and litter samples were collected and analyzed to establish the carbon concentration. Average bole carbon concentration of the dominant species was 49.6%. Alder and oak presented the highest and lowest carbon concentrations (51.3% and 47.3%, respectively), and these were significantly different. Average carbon concentration in the crowns of all tree species was 51.2%. The highest percentage of carbon was found in alder (52.8%) and the lowest in oak (49.5%). The average carbon percentage in shrubs plus herbs collected from forests and acahuales (47.0%), coffee tree plantations (41.4%) and grasslands (34.6%) were significantly different. In contrast, the mean carbon concentration of litter of all the systems forests and acahuales was 44.7%. These results indicated that in hilly landscapes the components of the dominant vegetation types contain a carbon concentration that is particular to each case and must be considered when carbon stocks are estimated.
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