Carbon accumulation and storage capacity in mangrove sediments three decades after deforestation within a eutrophic bay.
Mar Pollut Bull
; 126: 275-280, 2018 Jan.
Article
en En
| MEDLINE
| ID: mdl-29421098
ABSTRACT
A dated sediment core from an eutrophic mangrove area presented non-significant differences in carbon accumulation rates before (55.7±10.2gm-2yr-1) and after three decades of deforestation (59.7±7.2gm-2yr-1). Although eutrophication effects appear to compensate the loss of mangrove organic matter input, the results in this work show a threefold lower carbon accumulation than the global averages estimated for mangrove sediments. The effects of increasing eutrophication and enhanced sediment dry bulk density observed after deforestation (~30% higher) did not result in higher carbon stocks. Moreover, the lower TOCOP (<400) and CN (~20) molar ratios, as well as increased nutrient accumulation, reflect the dominance of phytoplankton-derived organic matter after deforestation, resulting in less-efficient sedimentary carbon sinks. These results indicate that the organic material deposited from eutrophication may not compensate mangrove deforestation losses on carbon accumulation in mangrove ecosystems.
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Base de datos:
MEDLINE
Asunto principal:
Conservación de los Recursos Naturales
/
Eutrofización
/
Humedales
/
Secuestro de Carbono
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2018
Tipo del documento:
Article