Portal de Periódicos da CAPES

RELATIONSHIP BETWEEN BLUE CARBON AND METHANE AND THE HYDROCHEMISTRY OF MANGROVES IN SOUTHEAST MEXICO

2020; Hungarian University of Agriculture and Life Sciences; Volume: 18; Issue: 1 Linguagem: Inglês

10.15666/aeer/1801_10911106

1785-0037

Claudia M. Agraz-Hernández, Carlos A. Chan-Keb, Raquel Muñiz‐Salazar, Román Pérez-Balan, Juan Osti-Sáenz, Eduardo J. Gutiérrez‐Alcántara, Jordán E. Reyes-Castellano, L.O. MAY-COLLI, Kenia Conde-Medina, J. RUIZ-HERNÁNDEZ,

Potato Plant Research

The anthropogenic activities change hydrological pattern of mangrove ecosystems affecting their carbon accumulation and methane emissions.For this reason, the aim for this study was to estimate carbon and nitrogen quantity, in addition to methane emission associated with physicochemical parameters from sediment into three mangrove ecosystems (Los petenes Biosphere Reserve (BR), Laguna de Términos and Champotón) with different anthropic pressure and hydrological characteristics along the Campeche coast.Sampling was realized in rainy season and pH, Redox from interstitial water were measured, soil parameters, salinity, methane emissions and carbon concentration were determined simultaneously.Carbon sequestered average in the three study areas was 170 Mg ha -1 , significant differences were not observed (F2,29=0.02,p=0.97).The highest methane emissions were found in Laguna de Términos (673.24±922mg m -2 h -1 ), with significant differences (F2,29=3.55,p=0.042) among the three ecosystems.Carbon sequestration in Los Petenes BR established an inverse relationship with methane emissions (Y=482.4-2.245x,R 2 =0.67, p<0.025).In Champotón ecosystem, carbon sequestration presented a direct correlation with salinity (Y=-116.3+11.53x,R 2 =0.70, p<0.008).Methane emissions in Laguna de Términos established an inverse relationship with soil pH (Y=12027-2190x, R 2 =0.77, p<0.0001), attributed to different environmental conditions and different prevailing anthropic pressures in each ecosystem.