The importance of blue carbon soil stocks in tropical semiarid mangroves: a case study in Northeastern Brazil

Autor(es)

Nobrega, Gabriel N. ^{[1, 2]} ; Ferreira, Tiago O. ^[1] ; Neto, Marcos Siqueira ^[3] ; Mendonca, Eduardo de S. ^[4] ; Romero, Ricardo E. ^[5] ; Otero, Xose L. ^[6]

Afiliação do(s) autor(es)

^[1] Escola Super Agr Luis Dequeiroz, Dept Ciencia Solo, Piracicaba, SP - Brazil

^[2] Fed Fluminense Univ, Dept Geochem, Grad Program Earth Sci Geochem, Chem Inst, 5th Floor, Outeiro St John Baptist S-N, BR-24020141 Niteroi, RJ - Brazil

^[3] Univ Sao Paulo, Ctr Energia Nucl Agr, Lab Biogeoquim Ambiental, Piracicaba, SP - Brazil

^[4] Univ Fed Espirito Santo, Dept Agron, Alegre, ES - Brazil

^[5] Univ Fed Ceara, Dept Ciencias Solo, Campus Pici, Fortaleza, Ceara - Brazil

^[6] Univ Santiago de Compostela, Fac Biol, Dept Edafol & Quim Agr, Campus Sur, Santiago De Compostela - Spain

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL EARTH SCIENCES; v. 78, n. 12 JUN 2019.
• Citações Web of Science: 1

Resumo

This study aims to quantify soil organic C density (SOCD) in tropical semiarid mangroves and to compare these results to SOCD under the main tropical semiarid vegetation units (VU), aiming to better understand the role of semiarid mangroves in C sequestration, as well as to provide a basis for a better quantification of human impacts on this ecosystem. SOCD was quantified in two sets of calculations: at a 40-cm soil depth and considering the same soil mass (equivalent SOC). Mangroves can be considered the main organic C sink in the tropical semiarid environment, storing twice as much organic C per area as semiarid VUs, when considering the upper 40-cm soil layer and almost 6 times as much organic C per area when considering the same soil mass. Anthropogenic impacts (disposal of nutrients and vegetation removal) on the studied mangroves decreased SOCD and resulted in a 4.94 +/- 0.74Tg CO2 emission, equivalent to 5.2% of the Brazilian annual CO2 emission by fossil fuels. Compared to mangroves from tropical humid regions, SOCD in tropical semiarid mangroves is considerably lower. (AU)

• Processo FAPESP: 17/08101-1 - Recuperação do estoque de C e das funções ecológicas em manguezais replantados
• Beneficiário: Gabriel Nuto Nóbrega
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado