INVESTIGADORES
LARA Ruben Jose
artículos
Título:
Mangroves, a major source of dissolved organic carbon to the oceans
Autor/es:
DITTTMAR, THORSTEN; HERTKORN, NORBERT; KATTNER, GERHARD; LARA, RUBÉN JOSÉ
Revista:
GLOBAL BIOGEOCHEMICAL CYCLES
Editorial:
American Geophysical Union
Referencias:
Lugar: Washington; Año: 2006 p. 1 - 7
ISSN:
0886-6236
Resumen:
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Organic
matter, which is dissolved in low concentrations in the vast waters of the oceans,
contains a total amount of carbon similar to atmospheric carbon dioxide. To understand
global biogeochemical cycles, it is crucial to quantify the sources of marine dissolved
organic carbon (DOC). We investigated the impact of mangroves, the dominant intertidal
vegetation of the tropics, on marine DOC inventories. Stable carbon isotopes and
proton nuclear magnetic resonance spectroscopy showed that mangroves are the main
source of terrigenous DOC in the open ocean off northern Brazil.
Sunlight efficiently destroyed aromatic molecules during transport offshore,
removing about one third of mangrove-derived DOC. The remainder was refractory
and may thus be distributed over the oceans. On a global scale, we estimate
that mangroves account for >10% of the terrestrially derived, refractory DOC
transported to the ocean, while they cover only <0.1% of the continents
surface.