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

摘要这项研究将继续并扩展2006年奥登南大洋考察期间与瑞典科学家Mellissa Chierici合作开展的南大洋研究。我们将量化边缘冰带（MIZ）食物网中的碳通量，方法是测量初级和次级生产的分异大小、放牧和通过纳米浮游生物（2-20微米）、微型浮游生物（20-200微米）和中浮游生物（200-2000微米）的碳通量。群落结构、物种丰度和大小特定放牧率将使用各种技术进行量化，这些技术既可以在海上进行，也可以在MIZ沿线的冰站进行。拟议的巡航路线穿过德雷克海峡延伸到南极半岛西部（WAP），沿着从开放海洋到贝林豪森海和阿蒙森海的边缘冰区（MIZ）的梯度有三个站点横断面，然后进入罗斯海冰川。沿每个样带的冰站将提供资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、微型浮游生物和中浮游生物）和水文测量（温度、盐度、pH值、DO、浊度）将为未来的巡航建立基线，并为其他项目提供支持，如二氧化碳减少的生物地球化学研究和初级生产的微量金属工作。这些测量的结果将描述贝林豪森海和阿蒙森海以及罗斯海冰陆的中浮游生物种群、群落结构和碳通量。

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.