Edaphic factors controlling summer (rainy season) greenhouse gas emissions (CO2 and CH4) from semiarid mangrove soils (NE-Brazil)

Autor(es)

Nobrega, Gabriel N. ; Ferreira, Tiago O. ; Siqueira Neto, M. ; Queiroz, Hermano M. ; Artur, Adriana G. ; Mendonca, Eduardo De S. ; Silva, Ebenezer De O. ; Otero, Xose L.

• Tipo de documento: Artigo Científico
• Fonte: Science of The Total Environment; v. 542, p. 9-pg., 2016-01-15.

Resumo

The soil attributes controlling the CO2, and CH4 emissions were assessed in semiarid mangrove soils (NE-Brazil) under different anthropogenic activities. Soil samples were collected from different mangroves under different anthropogenic impacts, e.g., shrimp farming (Jaguaribe River); urban wastes (Coco River) and a control site (Timonha River). The sites were characterized according to the sand content; physicochemical parameters (Eh and pH); total organic C; soil C stock (SCS) and equivalent SCS (SCSEQV); total P and N; dissolved organic C (DOC); and the degree of pyritization (DOP). The CO2 and CH4 fluxes from the soils were assessed using static closed chambers. Higher DOC and SCS and the lowest DOP promote greater CO2 emission. The CH4 flux was only observed at Jaguaribe which presented higher DOP, compared to that found in mangroves from humid tropical climates. Semiarid mangrove soils cannot be characterized as important greenhouse gas sources, compared to humid tropical mangroves. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/11778-5 - Solos subaquáticos de pradarias marinhas (seagrass bed) do Brasil: biogeoquímica, gênese e classificação
• Beneficiário: Gabriel Nuto Nóbrega
• Modalidade de apoio: Bolsas no Brasil - Doutorado