Material Fluxes from a Coral Reef Framework

以前的研究表明， 微生物介导的好氧和厌氧成岩作用 海洋碳酸盐框架，如珊瑚礁。 在这些 沉积系统，平流和湍流水流，而不是 而不是扩散，主导着溶解物质的交换 骨架间隙水与上覆岩层之间 海水 然而，成岩作用足够迅速， 最终产品的浓度升高， 营养素和H2S。 成岩终产物的总通量 从珊瑚礁框架到邻近环境的变化 测定 工作将做1）扩大空间规模的 在奥克拉荷马州珊瑚礁的间隙水取样， 详细描述了礁架的上部1 m; 2）直接 测量成岩作用的平流和扩散通量 反应物和产物之间的礁框架和 珊瑚礁上几个点的周围环境; 3） 收集数据以校准平流的水文模型 珊瑚礁内的间隙水; 4）继续测量 无机物和有机物的时空分布 珊瑚礁内的成岩反应物/产物，特别是 关注短链有机氮化合物; 5）使用 第4）项中的浓度数据与水文模型 估算有机和无机成岩速率 在珊瑚礁框架内发生的反应。

Previous research has demonstrated the widespread occurrence of microbially mediated aerobic and anaerobic diagenesis within marine carbonate frameworks such as coral reefs. In these sedimentary systems, advective and turbulent water flow, rather than diffusion, dominates the exchange of dissolved material between the framework interstitial water and the overlying seawater. Nevertheless, diagenesis is rapid enough to result in elevated concentrations of end products such as inorganic nutrients and H2S. The overall fluxes of diagenetic end products from a reef framework to the neighboring environment will be determined. Work will be done to 1) extend the spatial scale of the interstitial water sampling at Checker Reef, Oahu to examine in detail the upper 1 m of the reef framework; 2) directly measure the advective and diffusive fluxes of diagenetic reactants and products between the reef framework and the surrounding environment at several points across the reef; 3) collect data to calibrate a hydrological model of the advection of interstitial water within the reef; 4) continue measurements of the spatial and temporal distribution or inorganic and organic diagenetic reactants/products within the reef, with particular attention to short-chain organic nitrogen compounds; and 5) use the concentration data from item 4) with the hydrological model to estimate the rates of organic and inorganic diagenetic reactions occurring within the reef framework.