title: Edaphic factors controlling summer (rainy season) greenhouse gas emissions (CO2 and CH4) from semiarid mangrove soils (NE-Brazil).
abstract: 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.
authors.affiliation: Departamento de Ciência do Solo, Escola Superior de Agricultura Luiz de Queiroz, ESALQ/USP, Av.Pádua Dias 11, Piracicaba, São Paulo 13.418-260, Brazil.
authors.forename: Gabriel N
authors.initials: GN
authors.lastname: Nóbrega
authors.affiliation: Departamento de Ciência do Solo, Escola Superior de Agricultura Luiz de Queiroz, ESALQ/USP, Av.Pádua Dias 11, Piracicaba, São Paulo 13.418-260, Brazil. Electronic address: toferreira@usp.br.
authors.forename: Tiago O
authors.initials: TO
authors.lastname: Ferreira
authors.affiliation: Laboratório de Biogeoquímica Ambiental, Centro de Energia Nuclear na Agricultura, CENA/USP, Av. Centenário 303, Piracicaba, São Paulo 13.400-970, Brazil.
authors.forename: M
authors.initials: M
authors.lastname: Siqueira Neto
authors.affiliation: Departamento de Ciências do Solo, Universidade Federal do Ceará, UFC, Av. Mister Hull 2977, Campus do Pici, Fortaleza, Ceará 60.440-554, Brazil.
authors.forename: Hermano M
authors.initials: HM
authors.lastname: Queiroz
authors.affiliation: Departamento de Ciências do Solo, Universidade Federal do Ceará, UFC, Av. Mister Hull 2977, Campus do Pici, Fortaleza, Ceará 60.440-554, Brazil.
authors.forename: Adriana G
authors.initials: AG
authors.lastname: Artur
authors.affiliation: Departamento de Produção Vegetal, Universidade Federal do Espírito Santo, UFES, Alto Universitário s/n, Alegre, Espírito Santo 29.500-000, Brazil.
authors.forename: Eduardo De S
authors.initials: Ede S
authors.lastname: Mendonça
authors.affiliation: Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa de Agroindústria Tropical, Pós Colheita, Dra. Sara Mesquita Street, 2270, Planalto Pici, Fortaleza, Ceará 60.511-110, Brazil.
authors.forename: Ebenezer De O
authors.initials: Ede O
authors.lastname: Silva
authors.affiliation: Departamento Edafoloxía e Química Agrícola, Facultade de Bioloxía, Universidade de Santiago de Compostela, Rúa Lope Gómez de Marzoa, s/n. Campus sur, Santiago de Compostela 15.782, Spain.
authors.forename: Xosé L
authors.initials: XL
authors.lastname: Otero
keywords: Blue Carbon; Carbon dioxide; Coastal wetland soils; Methane; Soil organic matter