Mangroves, a major source of dissolved organic carbon to the oceans
Mangroves, a major source of dissolved organic carbon to the oceans
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DOI：
10.1029/2005gb002570
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发表时间：
2006-02-21
影响因子：
5.2
通讯作者：
Lara, RJ
中科院分区：
文献类型：
--
作者：
Dittmar, T;Hertkorn, N;Lara, RJ
有机物以低浓度溶解在广阔的海洋沃茨中，其碳总量与大气中的二氧化碳相似。海洋溶解有机碳（DOC）的来源是理解全球海洋地球化学循环的关键。我们调查了红树林，占主导地位的热带潮间带植被，海洋DOC库存的影响。稳定碳同位素和质子核磁共振波谱分析表明，红树林是巴西北方外海陆源DOC的主要来源。阳光有效地破坏了芳香分子在海上运输，消除了约三分之一的红树林衍生DOC。其余的是难熔的，因此可能分布在海洋中。在全球范围内，我们估计，红树林占>10%的陆地来源，难降解的DOC输送到海洋，而它们只覆盖
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