ABR: Studies on the Ecological Physiology of Midwater Animals

ABR：中层水域动物的生态生理学研究

• 批准号: 9415543
• 负责人: James Childress
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9415543&HistoricalAwards=false
• 关键词: ABR; Studies; Ecological; Physiology; Midwater

9415543 Childress This research is directed at testing the hypothesis that the remineralization of oceanic carbon by micronekton and zooplankton is a significant fraction of the oceanic carbon budget. This will be carried out by applying the data on metabolic patterns to a midwater animals biomass dataset which has been collected in the California Current in a 4100 m water column and using the metabolic data to estimate respiratory carbon flux due to this community and its major components. The research effort will focus on improved biomass estimates for gelatinous animals, improved estimations of metabolic rates at the low oxygen partial pressures found in midwater oxygen minimum layers, and collection of data from rarer and more fragile species. The significance of this research is tied to the importance of understanding the immense, global midwater ecosystem. An ecosystem which interacts extensively with the surface communities, but about which we know relatively little. The midwater fauna (including both micronekton and zooplankton) is a major factor in the flux of material through the water column as a result of vertical migration, predation on vertical migrnats, feeding on sedimenting materials and production of biomass and feces at depth. The respiratory oxidation of organic compounds at depth by this fauna is potentially a significant component of the carbon flux in midwater. To understand the importance of this assemblage of organisms in the economy of the ocean and in global carbon cycles, it is essential to obtain information on the rates of biological processes carried out by this fauna.

9415543 Childress 这项研究旨在检验以下假设：微游生物和浮游动物对海洋碳的再矿化是海洋碳预算的重要组成部分。这将通过将代谢模式数据应用于中层水域动物生物量数据集来进行，该数据集是在加州海流中 4100 m 水柱中收集的，并使用代谢数据来估计该群落及其主要组成部分的呼吸碳通量。研究工作将集中于改进胶状动物的生物量估计、改进中层含氧最低层中低氧分压下代谢率的估计，以及收集更稀有和更脆弱物种的数据。这项研究的意义与了解巨大的全球中层水域生态系统的重要性息息相关。一个与地表群落广泛相互作用的生态系统，但我们对此知之甚少。由于垂直迁移、捕食垂直迁徙动物、以沉积物为食以及在深处产生生物量和粪便，中层水动物群（包括微游生物和浮游动物）是物质通过水体通量的主要因素。该动物群对深层有机化合物的呼吸氧化可能是中层水碳通量的重要组成部分。为了了解这种生物体组合在海洋经济和全球碳循环中的重要性，有必要获取有关该动物群进行的生物过程速率的信息。