Análise do teor de carbono nas espécies de mangue em Guaratiba (Rio de Janeiro, RJ)

• Autor(a) principal: Rodrigues, Daniela Pelluso
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/13889
• topic: Mangroves; Global change; Carbon amount; Manguezal; Mudanças globais; Teor de carbono; CNPQ::CIENCIAS EXATAS E DA TERRA::OCEANOGRAFIA

Mangroves are complex ecosystems that are subject to processes that occur over different temporal and spatial scales. This complexity reinforces the importance the use approaches that can achieve these scales. Mangrove forests, among other functions, serve as scavenging and fixing carbon, being important for the balance of the global carbon dioxide. Related studies show that several biomes is no difference in carbon content to different species. Several estimates of stock and carbon sequestration in mangrove forests adopt the value of 45% for carbon in mangrove species. The present study in Guaratiba, Rio de Janeiro, collected branches, leaves, stems, roots and reproductive parts of the species found there: Avicennia schaueriana, Laguncularia racemosa and Rhizophora mangle, the latter had still collecting rhizophores, for determination of carbon in the various compartments of different species. The samples were taken in different physiographic types (fringe, basin and transition). The dried material was powdered and determined by autoanalyzer CHN. The results were tested statistically using analysis of variance (ANOVA) and Tukey's test to identify differences between the types physiographic, species and compartments (p <0.05). Was obtained a value of organic carbon to the woody parts (44.1%) for all species, a value for green parts of A. schaueriana and L. racemosa of 42.6% and R. mangle of 44.9%, and a value for the root of A. schaueriana and L. racemosa of 42.6% and R. mangle of 40.0%. There were no detectable influence of physiographic types on carbon in mangrove forest studied. The present results also demonstrate that one should be cautious in the use of a single, global value for the carbon in mangrove species.