Biologically- induced Mixing of Stratified Waters by Swimming Zooplankton

游泳浮游动物生物诱导的分层水混合

• 批准号: 193232038
• 负责人: Professor Dr. Andreas Lorke
• 金额: --
• 依托单位: Bundesanstalt für Wasserbau (BAW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/193232038?language=en
• 关键词: Biologically; induced; Mixing; Stratified; Waters

Swimming of aquatic organisms is associated with the generation of velocity fluctuations and fluid mixing. Such biologically-generated flows are not only important for the organisms itself, by affecting nutrient uptake, predator-prey interactions, and the perception of hydrodynamic and chemical signals, an ongoing scientific debate also concerns their importance for the vertical mass and heat transport on basin-scales. In this project we will quantify the fluid transport associated with swimming zooplankton in density-stratified waters. Although zooplankton belongs to the smallest motile organisms in aquatic ecosystems, their contribution to biomixing are expected to be important because they occur in high densities and many zooplankton species perform a diel vertical migration. Using volumetric particle image velocimetry for characterizing the flow field, in combination with laser-induced fluorescence for measuring scalar transport and fluxes, we will quantify the biologically-induced mixing due to individuals, groups of interacting organisms, and vertically migrating zooplankton, in a series of laboratory experiments.

水生生物的游泳与速度波动和液体混合的产生有关。这种生物学生成的流不仅对生物本身而言很重要，它通过影响养分吸收，捕食者捕集的相互作用以及对流体动力学和化学信号的感知，还涉及持续的科学辩论，也涉及它们对盆地阶级垂直质量和热量传输的重要性。在这个项目中，我们将量化与密度分层水中游泳浮游动物相关的流体运输。尽管浮游动物属于水生生态系统中最小的运动生物，但它们对生物综合的贡献有望很重要，因为它们发生在高密度中，许多浮游动物物种进行了diel垂直迁移。使用体积粒子图像速度法来表征流场，并结合激光诱导的荧光来测量标量传输和通量，我们将在一系列实验室实验中，量化由于个体，相互作用的生物体和垂直迁移的浮游生物迁移而导致的生物学诱导的混合。

项目成果

Direct observation of biomixing by vertically migrating zooplankton

通过垂直迁移浮游动物直接观察生物混合

• DOI: 10.4319/lo.2014.59.3.0724
• 发表时间: 2014
• 期刊: Limnology and Oceanography
• 影响因子: 4.5
• 作者: A. Lorke

Zooplankton induced currents and fluxes in stratified waters

分层水中浮游动物感应电流和通量

• DOI: 10.2166/wqrjc.2012.135
• 发表时间: 2012
• 期刊: Water Quality Research Journal of Canada
• 影响因子: 2
• 作者: A. Lorke