Resumo

VALDES VELARDE, Eduardo et al. Organic carbon assessment in mangrove soils of Nayarit. Rev. mex. de cienc. forestales [online]. 2011, vol.2, n.8, pp.47-58. ISSN 2007-1132.

In 10 mangrove associations and nine landform classes analyzed of the Marismas Nacionales region, state of Nayarit, Mexico a total of 254 soil mixed samples on the first -20 cm were collected, in July and August of 2004, in which the soil organic carbon (SOC) content was determined through the analyzer method. During the rain season, soils in the landform Islote showed the highest SOC content with 128.5 t C ha^-1 while the Barra arcillosa landform the lowest with 54.6 t C ha^-1; these differences were significant (F = 4.02, gl = 8, p = 0.0003); about mangrove association, the highest SOC content was in the Laguncularia racemosa - Rhizophora mangle combination with 106.7 t C ha^-1 and the lowest in the R. mangle -L. racemosa -A. germinans combination with 73.7 t C ha^-1; these differences were not significant (F = 2.28, gl = 9, p = 0.0204). According with these results, the mangroves of Marismas Nacionales that had a greater contribution to the C content C in soil were in landform it borders and prevalence of L. racemosa and A. germinans.

Palavras-chave : Mangrove association; Avicennia germinans L. Stearn; Landform Class; Laguncularia racemosa (L.) Gaertn.; Marismas Nacionales; Rhizophora mangle L.

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