Bacteria-zooplankton interactions: a key to understanding bacterial dynamics and biogeochemical processes in lakes?

细菌-浮游动物相互作用：了解湖泊细菌动力学和生物地球化学过程的关键？

• 批准号: 201319348
• 负责人: Professor Dr. Hans-Peter Grossart
• 金额: --
• 依托单位: Abteilung 3: Plankton- und mikrobielle Ökologie
• 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/201319348?language=en
• 关键词: Bacteria; zooplankton; interactions; key; understanding

Worldwide, metazoan zooplankton represents an enormous surface and biomass in pelagic systems but their linkage with bacteria has been assumed to be rather indirect (via nutrient cycling and trophic cascades). However, a zooplankter’s body carries a high abundance of diverse bacteria, which can account for a substantial fraction and diversity of pelagic bacteria. Zooplankton bodies are organic-rich micro-environments that support fast bacterial growth. Their physical-chemical conditions differ from those in the surrounding water and hence select for different bacterial communities. Until now, information on bacteria- zooplankton interactions is still limited to only a few zooplankton groups and environments, in particular copepods in coastal and estuarine waters. Therefore, our proposal focuses on bacteria-zooplankton interactions in lakes. Since zooplankton taxa can have very different life history traits we will compare a large number of zooplankton taxa in a variety of lakes. In field and lab studies we will investigate these interactions with a high spatial and temporal resolution. We will address 4 topics: A) spatial and temporal variations in bacteria-zooplankton association, B) microbial dynamics in the zooplankton gut microhabitat, C) bacterial dispersal by migrating zooplankton and D) effects on microbial activities during the mid-summer zooplankton decline. We aim to fundamentally change the way we understand pelagic food webs and the ecological role of bacteria-metazoan interactions.

全球，后生动物浮游生物代表着骨质系统中巨大的表面和生物量，但它们与细菌的联系被认为是间接的（通过营养循环和营养级联）。然而，浮游动物体可带来高度抽象的多样性细菌，这可以解释大量的骨膜细菌。浮游动物体是支持快速细菌生长的有机微环境。它们的物理化学条件与周围水中的物理化学条件不同，因此选择了不同细菌群落。到目前为止，有关细菌 - 浮游动物相互作用的信息仍然仅限于少数浮游动物和环境，尤其是沿海和河口水域中的Copepods。因此，我们的建议着重于湖泊中的细菌 - 浮游动物相互作用。由于浮游动物类群具有不同的生活历史特征，因此我们将在各种湖泊中比较大量的浮游动物分类单元。在现场和实验室研究中，我们将通过高空间和临时分辨率研究这些相互作用。我们将讨论4个主题：a）浮游动力学中的微生物动力学的空间和临时变化，c）通过迁移浮游动物和d）对中萨姆杀虫剂浮游生物中微生物活性的影响，c）细菌分散体。我们的目标是从根本上改变我们了解上层食品网的方式和细菌 - 米塔唑互动的生态作用。

项目成果

Zooplankton carcasses and non-predatory mortality in freshwater and inland sea environments

• DOI: 10.1093/plankt/fbu014
• 发表时间: 2014-05
• 期刊: Journal of Plankton Research
• 影响因子: 2.1
• 作者: K. Tang;M. Gladyshev;O. P. Dubovskaya;G. Kirillin;H. Grossart

Structure and function of zooplankton-associated bacterial communities in a temperate estuary change more with time than with zooplankton species

• DOI: 10.3354/ame01676
• 发表时间: 2014-01-01
• 期刊: AQUATIC MICROBIAL ECOLOGY
• 影响因子: 1.4
• 作者: Bickel, Samantha L.;Tang, Kam W.;Grossart, Hans-Peter
• 通讯作者: Grossart, Hans-Peter

Tube-dwelling invertebrates: tiny ecosystem engineers have large effects in lake ecosystems

• DOI: 10.1890/14-1160.1
• 发表时间: 2015-08
• 期刊: Ecological Monographs
• 影响因子: 6.1
• 作者: F. Hölker;M. Vanni;J. Kuiper;C. Meile;H. Grossart;P. Stief;R. Adrian;A. Lorke;O. Dellwig

Copepod carcasses as microbial hot spots for pelagic denitrification

• DOI: 10.1002/lno.10149
• 发表时间: 2015-11-01
• 期刊: LIMNOLOGY AND OCEANOGRAPHY
• 影响因子: 4.5
• 作者: Glud, Ronnie N.;Grossart, Hans-Peter;Gissel Nielsen, Torkel
• 通讯作者: Gissel Nielsen, Torkel