Fine-scale vertical distribution of macroplankton and micronekton in the Eastern Tropical North Pacific in association with an oxygen minimum zone
Fine-scale vertical distribution of macroplankton and micronekton in the Eastern Tropical North Pacific in association with an oxygen minimum zone
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热带北太平洋东部大型浮游生物和微游生物与最低含氧区相关的细尺度垂直分布
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Wishner
中科院分区：
文献类型：
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作者：
Amy E. Maas;Sarah L. Frazar;Dawn M. Outram;B. Seibel;K. Wishner
2007年11月和2008年12月至2009年1月在热带北太平洋东部的哥斯达黎加穹区（98 N; 908 W）的0至1000米的微型浮游动物和大型浮游动物的垂直分布格局。该地区有一个明显的最低含氧区，影响到洄游物种和中层物种的分布。在与生态有关的地层内，以相对较细的尺度（中层深度间隔小至25米）进行取样，以评估这种水文环境如何影响这些群体的结构。浮游动物收集在垂直分层多开/关网和环境传感系统拖在白天和夜间，丰度与氧浓度，温度和深度的变化进行了分析。水柱的每一个垂直层都是一个独特的生态区，有着特定的群落构成。上层和中层水柱（0-550米）的强烈影响，昼夜垂直迁移模式，特别是白天下降的磷虾和myctophid鱼的OMZ的核心。在OMZ核心以下有明显不同的群落。下跃层（LO）（500-700米深度范围）以Cyclothone spp.为主。鱼类以及其他类群的多样性种群，经常聚集成一个离散层（25米厚），特别是在2008年。在suboxycline（0.700米深度范围），群落转移到
The 0to 1000-m vertical distribution patterns of micronekton and macrozooplankton were determined in the Costa Rica Dome region (98 N; 908 W) of the Eastern Tropical North Pacific in October–November 2007 and December 2008–January 2009. The area has a pronounced oxygen minimum zone (OMZ) that impacts the distribution of both migrating and mesopelagic species. Sampling was conducted at a relatively fine scale (mesopelagic depth intervals as small as 25 m) within ecologically relevant strata to assess how this hydrographic environment influenced the structure of these groups. Zooplankton were collected in vertically stratified Multiple Opening/Closing Net and Environmental Sensing System tows during the day and the night, and abundances were analyzed in association with variations in oxygen concentration, temperature and depth. Each vertical stratum of the water column was a unique ecological zone with a specific community makeup. The upper and midwater column (0–550 m) was strongly influenced by diel vertical migration patterns, particularly the daytime descent of euphausiids and myctophid fish into the core of the OMZ. Distinctly different communities occurred below the OMZ core. The lower oxycline (LO) ( 500–700 m depth range) was dominated by Cyclothone spp. fish as well as a diverse population of other taxa, often aggregated into a discrete layer (25 m thick), particularly in 2008. In the suboxycline (.700 m depth range), the community shifted to
影响因子：
56.9
作者：
Stramma, Lothar;Johnson, Gregory C.;Mohrholz, Volker
通讯作者：
Mohrholz, Volker