The Effectiveness of Poisons and Preservatives on Preventing the Decomposition of Organic Matter Collected in Sediment Traps

这项提案研究将调查常用毒药和防腐剂防止沉积物捕集器中收集的有机物发生变化和分解的能力。现场实验将在沿海和开阔海域、生产率最高和最低时期以及氧气和缺氧环境的条件下进行。这些实验将测试不同的毒药/防腐剂防止有关单个化合物和化合物类别的相对分解速率的基本信息的能力，特别是对比氧化和缺氧盆地中的陆源和海洋物质。将讨论两个主要问题：1)各种毒物和防腐剂对沉积物陷阱中收集的有机质的组成有何影响；2)主要种类的生物化合物的保存物的分解程度如何？回答这些问题的方法将是确定沉积物捕集器氯仿、盐梯度、福尔马林或抗生素中有机化合物(脂肪、糖、氨基酸、色素和木质素氧化产物)的浓度。现场实验将在不列颠哥伦比亚省的萨尼奇湾，在含氧和缺氧的水中，以及在百慕大附近的时间序列站S。

The proposal research will investigate the ability of commonly-used poisons and preservatives to prevent alteration and decomposition of organic matter collected in sediment traps. In-situ experiments will be conducted under conditions which represents both coastal and open ocean areas, periods of maximum high and low productivity, and oxic and anoxic environments. The experiments will test the ability of different poisons/preservations to prevent fundamental information on the relative decomposition rates of individual compounds and compound classes, specifically contrasting terrigenous and marine material in oxic and anoxic basins. Two major questions will be addressed: 1) what is the effectiveness of various poisons and preservations on the composition of organic matter collected in sediment traps; and 2) what is the extent of decomposition of preservation of the major classes of biogenic compounds? The approach of answering these questions will be to determine concentrations of organic compounds (lipids, sugars, amino acids, pigments, and lignin oxidation products) in sediment traps chloroform, salt gradient, formalin, or antibiotics. Field experiments will be Saanich Inlet, British Columbia, in oxic and anoxic waters, and at the time-series Station S off Bermuda.