Impact of lateral intrusions and mixing on the biogeochemistry and microbiology of pelagic redoxclines

横向侵入和混合对远洋氧化还原素生物地球化学和微生物学的影响

• 批准号: 217568432
• 负责人: Professor Dr. Klaus Jürgens
• 金额: --
• 依托单位: Leibniz-Institut für Ostseeforschung Warnemünde (IOW)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/217568432?language=en
• 关键词: Impact; lateral; intrusions; mixing; biogeochemistry

In coastal and marginal seas with stable stratification and reduced water exchange, hypoxic deep-water conditions are a frequently observed phenomenon. The so-called redoxcline, developing under such conditions at the top of the anoxic layer, is characterized by strong biogeochemical gradients, which are the location of some important microbially mediated element transformations. Here, our project hypothesis is that the rapid and intermittent modification of the local biogeochemical and microbiological conditions associated with lateral intrusions, in particular due to turbulent mixing between intrusions and ambient waters, constitutes an essential component of the redoxcline system. We plan to study this link between hydrography, turbulent mixing, biogeochemical processes, and microbial activities, taking the central Baltic Sea with its well-defined redoxcline as an example. A recently established autonomous profiling system in the Central Baltic Sea will provide high-resolution data, allowing us to determine the long-term variability of hydrographic, biogeochemical, and mixing parameters associated with the intrusions. The impact of mixing for the microbial activities and communities will be investigated during ship cruises, combining observations of mixing parameters, and representative biogeochemical and microbial transformation processes.

在分层稳定、水交换减少的沿海和边缘海域，低氧的深水条件是经常观察到的现象。所谓的氧化还原跃层是在这样的条件下在缺氧层顶部形成的，具有强烈的生物地球化学梯度，是一些重要的微生物介导的元素转化的位置。在这里，我们的项目假设是，与侧向侵入有关的局部生物地球化学和微生物条件的快速和间歇性改变，特别是由于侵入和周围水域之间的湍流混合，构成了氧化跃层系统的重要组成部分。我们计划以波罗的海中部及其明确的氧化还原跃层为例，研究水文地理学、湍流混合、生物地球化学过程和微生物活动之间的这种联系。最近在波罗的海中部建立的自主剖面系统将提供高分辨率数据，使我们能够确定与侵入有关的水文、生物地球化学和混合参数的长期变异性。将在船舶航行期间调查混合对微生物活动和群落的影响，结合对混合参数的观察，以及典型的生物地球化学和微生物转化过程。

项目成果

Effect of large magnetotactic bacteria with polyphosphate inclusions on the phosphate profile of the suboxic zone in the Black Sea

• DOI: 10.1038/s41396-018-0315-6
• 发表时间: 2019-01
• 期刊: The ISME Journal
• 作者: H. Schulz-Vogt;F. Pollehne;K. Jürgens;H. Arz;S. Beier;R. Bahlo;O. Dellwig;J. Henkel;Daniel P. R. Herlemann;S. Krüger;T. Leipe;Thomas Schott

Impact of a Major Inflow Event on the Composition and Distribution of Bacterioplankton Communities in the Baltic Sea

• DOI: 10.3389/fmars.2018.00383
• 发表时间: 2018-10-26
• 期刊: FRONTIERS IN MARINE SCIENCE
• 影响因子: 3.7
• 作者: Bergen, Benjamin;Naumann, Michael;Jurgens, Klaus
• 通讯作者: Jurgens, Klaus

A metatranscriptomics‐based assessment of small‐scale mixing of sulfidic and oxic waters on redoxcline prokaryotic communities

基于宏转录组学的氧化还原素原核生物群落硫化水和含氧水小规模混合的评估

• DOI: 10.1111/1462-2920.14499
• 期刊: Environmental Microbiology
• 影响因子: 5.1
• 作者: P. L. Holtermann;D. Numberger;T. Schott;L. Umlauf;K. Jürgens
• 通讯作者: K. Jürgens

Interleaving of oxygenized intrusions into the Baltic Sea redoxcline

• DOI: 10.1002/lno.11317
• 发表时间: 2019-09-16
• 期刊: LIMNOLOGY AND OCEANOGRAPHY
• 影响因子: 4.5
• 作者: Holtermann, Peter;Prien, Ralf;Umlauf, Lars
• 通讯作者: Umlauf, Lars

Diffusive Convection under Rapidly Varying Conditions

快速变化条件下的扩散对流

• DOI: 10.1175/jpo-d-18-0018.1
• 期刊: Journal of Physical Oceanography
• 影响因子: 3.5
• 作者: Umlauf;P. L. Holtermann;C. A. Gillner;R. Prien;L. Merckelbach;J. R. Carpenter
• 通讯作者: J. R. Carpenter