SGER: Primary and Secondary Production and Carbon Flux Through the Microbial Community Along the Western Antarctic Marginal Ice Zone on the Oden Southern Ocean 2007 Expeditions

摘要本研究将继续并扩展2006年奥登南大洋考察期间与瑞典科学家Mellissa Chierici合作发起的南大洋研究。我们将通过测量大小分级的初级和次级生产，放牧和碳通量通过微型浮游生物（2-20微米），微型浮游生物（20- 200微米），和中型浮游生物（200-2000微米）的边缘冰区（MIZ）的食物网量化碳通量。群落结构，物种丰度和大小特定的放牧率将使用各种技术进行量化，无论是在进行中，并在冰站沿着MIZ。拟议的巡航航迹延伸穿过德雷克海峡至南极西部半岛，沿沿着一个梯度，从开阔洋穿过别林豪森海和阿蒙森海的边缘冰区，进入罗斯海波利尼亚，有三个观测站断面。沿着每个样带的冰站将提供材料来描述与年冰有关的生产。正在进行的初级和次级生产（叶绿素、CDOM、微型浮游生物和中型浮游生物）和水文地理学（温度、盐度、pH值、溶解氧、浊度）测量将为今后的航行确定基线，并支持其他项目，如关于二氧化碳减少的生物地球化学研究和关于初级生产的痕量金属工作。这些测量的结果将是一个描述的纳米到中型浮游生物的常备股票，社区结构，和碳通量沿着MIZ在别林豪森和阿蒙森海和罗斯海Polynya。

AbstractThe research will continue and extend the study in the Southern Ocean that was initiated during the Oden Southern Ocean 2006 expedition in collaboration with Swedish scientist Mellissa Chierici. We will quantify carbon flux through the food web in the marginal ice zone (MIZ) by measuring size fractionated primary and secondary production, grazing and carbon flux through nanoplankton (2-20 um), microplankton (20-200um), and mesoplankton (200-2000 um). Community structure, species abundance and size specific grazing rates will be quantified using a variety of techniques both underway and at ice stations along the MIZ. The proposed cruise track extends across the Drake Passage to the Western Antarctic Peninsula (WAP) with three station transects along a gradient from the open ocean through the marginal ice zone (MIZ) in the Bellinghausen and Amundsen Seas and into the Ross Sea Polynya. Ice stations along each transect will provide material to characterize production associated with annual ice. Underway measurements of primary and secondary production (chlorophyll, CDOM, microplankton, and mesoplankton) and hydrography (temperature, salinity, pH, DO, turbidity) will establish a baseline for future cruises and as support for other projects such as biogeochemical studies on carbon dioxide drawdown and trace metal work on primary production. The outcome of these measurements will be a description of nano to mesoplankton standing stocks, community structure, and carbon flux along the MIZ in the Bellinghausen and Amundsen Seas and the Ross Sea Polynya.