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首页> 外文期刊>Marine Environmental Research >Organic matter content and particle size modifications in mangrove sediments as responses to sea level rise
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Organic matter content and particle size modifications in mangrove sediments as responses to sea level rise

机译：红树林沉积物中有机物含量和粒径的变化对海平面上升的响应

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Mangroves sediments contain large reservoirs of organic material (OM) as mangrove ecosystems produce large quantities and rapidly burial OM. Sediment accumulation rates of approximately 2.0 mmyear~(-1), based on ~(210)Pb_(ex) dating, were estimated at the margin of two well-developed mangrove forest in southern Brazil. Regional data point to a relative sea level (RSL) rise of up to ~4.0 mm year~(-1). This RSL rise in turn, may directly influence the origin and quantity of organic matter (OM) deposited along mangrove sediments. Lithostratigraphic changes show that sand deposition is replacing the mud (<63 μm) fraction and OM content is decreasing in successively younger sediments. Sediment accumulation in coastal areas that are not keeping pace with sea level rise is potentially conducive to the observed shifts in particle size and OM content.
机译：随着红树林生态系统产生大量并快速埋葬OM，红树林沉积物包含大量的有机物（OM）。根据〜（210）Pb_（ex）测年，估计了巴西南部两个发达的红树林边缘的沉积物累积速率约为2.0 mmyear〜（-1）。区域数据表明，相对海平面（RSL）上升到〜4.0 mm年〜（-1）。 RSL的上升反过来可能直接影响沿红树林沉积物沉积的有机物（OM）的来源和数量。岩石地层学变化表明，在较年轻的沉积物中，沙子的沉积正在代替泥浆（<63μm）部分，并且OM含量下降。与海平面上升不同步的沿海地区的沉积物沉积可能有利于观测到的粒径和OM含量变化。

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