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

SGER：2007 年奥登南大洋探险沿南极西部边缘冰区微生物群落的初级和次级生产以及碳通量

• 批准号: 0742057
• 负责人: Scott Gallager
• 金额: $ 7.5万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0742057&HistoricalAwards=false
• 关键词: SGER; Primary; Secondary; Production; Carbon

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.

这项研究将与瑞典科学家梅丽莎·基里奇合作，继续并扩大在2006年奥登南大洋探险期间发起的南大洋研究。我们将通过测量浮游生物(2-20微米)、微型浮游生物(20-200微米)和中游浮游生物(200-2000微米)的初级和次生生产力、放牧和碳通量的大小来量化边缘冰带(MIZ)食物网中的碳通量。群落结构、物种丰富度和特定大小的放牧率将使用各种技术进行量化，包括正在进行的技术和位于密西西比河沿岸的冰站。拟议的邮轮轨道横跨德雷克海峡延伸到南极半岛西部(WAP)，沿坡度有三个车站横断面，从开阔的海洋穿过别林豪森和阿蒙森海的边缘冰带(MIZ)，进入罗斯海波利尼亚。每个断面上的冰站将提供材料，以表征与年冰相关的产量。目前正在对初级和次级生产(叶绿素、CDOM、微型浮游生物和中游浮游生物)和水文学(温度、盐度、pH、DO、浊度)进行测量，这将为今后的航行确定基线，并支持其他项目，如二氧化碳排放的生物地球化学研究和初级生产的痕量金属加工。这些测量的结果将描述Bellinghausen海和Amundsen海以及罗斯海Polynya MIZ沿岸的纳米级到中级浮游生物的现存量、群落结构和碳通量。