Suboxic Diagenesis in Reef Frameworks

9504251 Sansone这个研究小组将研究夏威夷瓦胡岛近海一处珊瑚礁的上层框架内(大约)与有机物分解有关的生物地球化学过程。起源于礁体表面或其附近的颗粒和溶解的有机物被水力输送到礁体的上部，在那里，有机部分被异养细菌在亚缺氧或缺氧环境中分解。这些研究应该有助于更好地了解世界海洋许多地区珊瑚礁生态系统中的营养循环。此外，由于次生礁环境垂直分布广泛(约1米深)，该系统将提供对次生分解过程的详细替代研究的机会，这些过程在其他底栖生物环境中很常见，例如软沉积物，但由于空间尺度较小(通常为几毫米)，在后者中不能进行。

9504251 SANSONE This team of investigators will study the biogeochemical processes associated with the decomposition of organic matter within (approximately) the upper framework of a coral reef just offshore of Oahu, Hawaii. Particulate and dissolved organic matter originating at or near the reef surface is hydraulically transported into this upper part of the reef where organic moieties are broken down in a suboxic or anoxic environment by heterotrophic bacteria. These studies should lead to a better understanding of nutrient cycling in coral reef ecosystems in many part of the world ocean. Also, because the suboxic reef environment is vertically extensive (about 1 meter deep), this system will afford the opportunity for detailed proxy study of suboxic decomposition processes that are common in other benthic environments, such as soft sediments, but which cannot be carried out in the latter because of the small spatial scale (typically several millimeters).