• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aquatic Sciences >Spatial distribution of phytoplankton cells in small elongated lakes subject to weak diurnal wind forcing
【24h】

Spatial distribution of phytoplankton cells in small elongated lakes subject to weak diurnal wind forcing

机译：昼夜弱风作用下细长湖泊中浮游植物细胞的空间分布

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The horizontal distribution of phytoplankton in a medium-size canyon type reservoir, forced by weak winds of 3-4 ms~(-1) is largely driven by the interaction of the large-scale circulation and processes regulating the vertical distribution of algal cells in the water column. These drivers, in turn, are subject to diurnal variations, making our understanding of the horizontal distribution of phytoplankton a challenging task. A three-dimensional physical-ecological model is used to understand the spatial distribution of algae and the role of diurnal variations in the physical-biological drivers. The model was used to demonstrate that the large-scale circulation induced during the day is more efficient generating patchiness than the circulation existing at night, when convectively driven turbulence homogenizes the upper layers. Different spatial distributions develop for different populations and under different forcing scenarios, characterized in terms of the directionality of wind forcing, wind magnitude and the lags between winds and diel heat fluxes. The time scales needed so that algal biomass in the surface exhibit significant longitudinal gradients-T_p-will vary depending on the algal group, and its ability to regulate its vertical position. These scales are shorter for those species that either migrate actively in the water column or exhibit positive buoyancy (Cryptophytes or Positive buoyant algae). In El Gergal, these scales T_p are on the order of a few days. Synoptic changes in the meteorological forcing, like the passing of a front, could potentially change the longitudinal distribution of algal biomass if they persist for periods of time longer than T_p.
机译：中型峡谷型水库中浮游植物的水平分布是由3-4 ms〜（-1）的弱风强迫而来的，这在很大程度上是由大型环流和调节藻类细胞垂直分布的过程相互作用共同驱动的。水柱。反过来，这些驱动因素会发生昼夜变化，这使我们对浮游植物水平分布的理解成为一项艰巨的任务。三维物理生态模型用于了解藻类的空间分布以及昼夜变化在物理生物学驱动因素中的作用。该模型用于证明，当对流驱动的湍流使上层均质化时，白天引起的大规模环流比夜间存在的环流更有效地产生斑块。对于不同的人口和在不同的强迫情况下，会形成不同的空间分布，其特征在于风力的方向性，风的大小以及风和diel热通量之间的滞后。为了使表面中的藻类生物质显示出明显的纵向梯度-T_p-，所需的时间尺度将根据藻类及其调节其垂直位置的能力而变化。对于那些在水柱中主动迁移或表现出正浮力（隐藻类或正浮力藻类）的物种而言，这些规模较小。在El Gergal，这些标度T_p约为几天。如果气象强迫的天气变化持续时间超过T_p，则可能会改变藻类生物量的纵向分布。

著录项

  • 来源
    《Aquatic Sciences》 |2014年第1期|83-99|共17页
  • 作者

    Javier Vidal; Anna Rigosi; Andrea Hoyer; Carmelo Escot; Francisco J. Rueda;

  • 作者单位

    Instituto del Agua, Universidad de Granada, Granada, Spain,Marine Science Institute, University of California Santa Barbara, Santa Barbara, USA Earth Research Institute, University of California Santa Barbara, Santa Barbara, USA;

    Instituto del Agua, Universidad de Granada, Granada, Spain;

    Instituto del Agua, Universidad de Granada, Granada, Spain,Departamento de Ingenieria Civil, Universidad de Granada, Granada, Spain;

    Empresa Metropolitana de Abastecimiento y Saneamiento de Aguas de Sevilla, S.A. EMASESA, Sevilla, Spain;

    Instituto del Agua, Universidad de Granada, Granada, Spain,Departamento de Ingenieria Civil, Universidad de Granada, Granada, Spain;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phytoplankton; Patchiness; Wind-driven circulation; Lakes;

    机译：浮游植物;斑块;风循环;湖泊;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号