The Role of Mesozooplankton in Biogenic Flux in the Arabian Sea

9310687 Roman美国JGOFS阿拉伯海过程研究的一个主要目标是研究该区域在全球生物地球化学通量中的作用，特别是在斜斜下固碳方面的作用。中浮游动物在这一过程中很重要，因为它们消耗悬浮物质，并通过产生快速下沉（200 m d-1）的粪便颗粒，促进其从地表水中清除。由于这种生物物质垂直通量的增强，中浮游动物研究是JGOFS的“核心”领域。罗曼博士将在阿拉伯海项目中进行中浮游动物生物量、放牧和粪便颗粒生产的测量。研究目标是确定中浮游动物在阿拉伯海生物通量中的作用。研究目标是：(1)估算阿拉伯海中浮游动物不同大小类别（64-2000 um）的生物量（C， N），并确定其垂直和水平分布；(2)估算不同大小类别的中浮游动物的光合固定碳消耗量；(3)估算不同大小类别的中浮游动物对异养碳（纤毛虫和鞭毛虫）的消耗；(4)估算不同大小类别的中浮游动物以粪球形式输出碳氮的潜在速率；(5)确定缺氧水体对中浮游动物生物量和放牧的影响。

9310687 Roman A major goal of the U.S. JGOFS Arabian Sea Process Study is to examine the role of this region in global biogeochemical fluxes, particularly in sequestering carbon below the pycnocline. Mesozooplankton are important in this process because they consume suspended material and facilitate its removal from surface waters by the production of rapidly sinking ( 200 m d-1) fecal pellets. Because of this enhancement of the vertical flux of biogenic material, mesozooplankton research is a "core" area of JGOFS. Dr. Roman will conduct measurements of mesozooplankton biomass, grazing and fecal pellet production in the Arabian Sea Program. The research goal is to determine the role of mesozooplankton in biogenic flux in the Arabian Sea. The research objectives are to: (1) estimate the biomass (C, N) of different size classes of mesozooplankton (64-2000 um) in the Arabian Sea and to determine how this biomass is vertically and horizontally distributed; (2) estimate the consumption of photosynthetically fixed carbon by different size classes of mesozooplankton; (3) estimate the consumption of heterotrophic carbon (ciliates and flagellates) by different size classes of mesozooplankton; (4) estimate the potential rates of carbon and nitrogen export in the form of fecal pellets by different size classes of mesozooplankton; (5) determine the effect of suboxic waters on mesozooplankton biomass and grazing.