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BIBTEX RIS

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

2015; Elsevier BV; Volume: 542; Linguagem: Inglês

10.1016/j.scitotenv.2015.10.108

ISSN

1879-1026

Autores

Gabriel Nuto Nóbrega, Tiago Osório Ferreira, Marcos Siqueira Neto, Hermano Melo Queiroz, Adriana Guirado Artur, Eduardo de Sá Mendonça, Ebenézer de Oliveira Silva, Xosé Luís Otero,

Tópico(s)

Coastal and Marine Dynamics

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 (Cocó 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.

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