Distribution, Biomass and Ecological Role of Macrozooplankton and Fishes in the Arabian Sea and Equatorial Indian Ocean

阿拉伯海和赤道印度洋大型浮游动物和鱼类的分布、生物量和生态作用

• 批准号: 9423443
• 负责人: Patricia Kremer
• 金额: $ 5.13万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-12-15 至 1996-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423443&HistoricalAwards=false
• 关键词: Distribution; Biomass; Ecological; Role; Macrozooplankton

9423443 Kremer The goal of this project is to determine the abundance and distribution of macrozooplankton and fishes in the Arabia Sea, and to estimate their contribution to the vertical flux of organic matter in these environments. The monsoonally forced Arabian Sea ecosystem is one of the most productive in the world, but with sharp, seasonal contrasts in production and sedimentation. The system is unusual in the distribution and comparison of its fauna, and in the pathways by which surface production is distributed into the water column and sea floor. The Somali coastal upwelling zone is a productive region supporting a high-biomass, low- diversity pelagic fauna, and the equatorial Indian Ocean is a typical oligotrophic zone uith a high diversity of inadequately known species. Many questions remain to be answered on the role of such processes as egestion and diel vertical migration of large organisms in regulating vertical fluxes of material in these contrasting regimes. Specific objectives of the study include: 1) determination of distribution and abundance of macrozooplankton and fishes; 2) determination of the extent and timing of diel vertical migration of zooplankton and fish; 3) examination and quantification of stomach contents and egestion rates of macrozooplankton; 4) use of trawl collections to provide ground-truth calibration of concurrent acoustic sampling by other investigators; and 5) analysis of the species diversity and zoogeography of macrozooplankton and fishes in the Arabian Sea and adjacent equatorial Indian Ocean. Our results will contribute to understanding community structure and trophic dynamics in the Arabian Sea and Indian Ocean pelagic ecosystems. The cruises will be concurrent with two of the JGOFS Pelagic Process cruises, and our data will bear on JGOFS objectives of measuring and understanding vertical fluxes in the Arabian Sea .

小行星9423443 该项目的目标是确定阿拉伯海大型浮游动物和鱼类的丰度和分布，并估计它们对这些环境中有机物垂直通量的贡献。 受季风影响的阿拉伯海生态系统是世界上最具生产力的生态系统之一，但在生产和沉积方面存在鲜明的季节性差异。 该系统在其动物群的分布和比较方面，以及在将表层生产物分配到水柱和海底的途径方面，都是不寻常的。 索马里沿岸上升流区是一个生产区，支持高生物量，低多样性的中上层动物群，赤道印度洋是一个典型的贫营养区，具有高度多样性的不充分的已知物种。 许多问题仍然有待回答的作用，如排泄和昼夜垂直迁移的大型生物在调节垂直通量的材料在这些对比制度。 研究的具体目标包括：1）确定大型浮游动物和鱼类的分布和丰度; 2）确定浮游动物和鱼类昼夜垂直迁移的范围和时间; 3）检查和量化大型浮游动物的胃内容物和排泄率; 4）使用拖网收集物对其他调查人员同时进行的声学采样进行地面实况校准; 5）阿拉伯海及邻近赤道印度洋大型浮游动物和鱼类的物种多样性和动物地理分析。 我们的研究结果将有助于了解阿拉伯海和印度洋远洋生态系统的群落结构和营养动态。 这些航行将与联合全球海洋观测系统的两次远洋过程航行同时进行，我们的数据将有助于联合全球海洋观测系统测量和了解阿拉伯海垂直通量的目标。