RT Journal Article
T1 Crab Bioturbation and Seasonality Control Nitrous Oxide Emissions in Semiarid Mangrove Forests (Ceará, Brazil)
A1 Otero Pérez, Xosé Lois
A1 Araújo Júnior, José M. C.
A1 Barcellos, Diego
A1 Queiroz, Hermano M.
A1 Romero, Danilo J.
A1 Nóbrega, Gabriel Nuto
A1 Siqueira Neto, Marcos
A1 Ferreira, Tiago Osório
K1 Ucides cordatus
K1 N2O
K1 Mangroves
K1 Greenhouse gas
K1 Eestuarine fauna
AB Seasonality and crab activity affects the nutrients and physicochemical parameters in mangrove soils, thus, affecting the emissions of greenhouse gases, such as nitrous oxide (N2O). Climate change may intensify rainfall and/or enhance droughts, affecting mangroves and associated biota. Crabs are natural soil bioturbators responsible for soil aeration and turnover. We evaluated the effect of Ucides cordatus crab on N2O emissions from mangrove soils under a semiarid climate in Northeastern Brazil. Soil and gas samples were collected over the rainy and dry seasons in crab-naturally-bioturbated and crab-exclusion mangrove plots. We measured the soil’s pH, redox potential, and the total contents of carbon, nitrogen, and sulfur. We found higher N2O emissions in the crab-exclusion sites compared to the bioturbated sites, as well as higher N2O emissions in the rainy season compared to the dry season. The fluxes of N2O (µg m−2 h−1) were 47.3 ± 9.7 and 8.9 ± 0.5 for the crab-exclusion sites, and 36.5 ± 7.8 and 4.5 ± 2.1 for the bioturbated sites (wet and dry seasons, respectively). The soil turning over by macrofauna led to lower N2O fluxes in natural crab-bioturbated areas, and seasonality was the environmental factor that contributed the most to the changes in N2O emissions. Broadly, anthropic activities and seasonality influence nitrogen fate, N2O emissions, and ecological services in coastal ecosystems
PB MDPI
YR 2020
FD 2020
LK http://hdl.handle.net/10347/23756
UL http://hdl.handle.net/10347/23756
LA eng
NO Otero, X.L.; Araújo, J.M.C., Jr.; Barcellos, D.; Queiroz, H.M.; Romero, D.J.; Nóbrega, G.N.; Siqueira Neto, M.; Ferreira, T.O. Crab Bioturbation and Seasonality Control Nitrous Oxide Emissions in Semiarid Mangrove Forests (Ceará, Brazil). Appl. Sci. 2020, 10, 2215
NO The authors are grateful for the financial support provided by São Paulo Research Foundation (FAPESP, grant number 2018/04259-2), National Council for Scientific and Technology Development (CNPq, process 305996/2018-5; 409593/2018-4), Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico (FUNCAP), Foundation for Research and Scientific and Technological Development of Maranhão and National Council of Technological and Scientific Development (FAPEMA/CNPq, grant #03572/2016), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001, Consellería de Innovación e Industria-Xunta de Galicia (PGIDIT08MDS036000PR), Cross-Research in Environmental Technologies of the Santiago de Compostela University (CRETUS) strategic group (AGRUP2015/02), and Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (GNN, JCNE Grant #202.757/2019)
DS Minerva
RD 30 abr 2026