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Evaluation and quantification of microbial degradation of allochthonous organic matter by "priming" (MicroPrime)

Evaluation and quantification of microbial degradation of allochthonous organic matter by "priming" (MicroPrime)
通过“引发”对异地有机物的微生物降解进行评估和定量(MicroPrime)
批准号:
256575941
负责人:
Professor Dr. Hans-Peter Grossart
金额:
$0.0万
依托单位国家:
德国
项目类别:
Research Grants
财政年份:
2014
资助国家:
德国
项目状态:
已结题
起止时间:
2013-12-31 至 2018-12-31

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中文摘要
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英文摘要
The main goal of this project is to characterize future changes in aquatic C-cycling via microbial mechanisms, in particular by focusing on priming effects, which have been little studied in aquatic ecosystems. Depending on environmental conditions, priming can either stimulate or inhibit microbial C-cycling. Therefore, we aim to unravel future changes in the role of priming via compound specific stable isotope analysis (e.g. 13C/12C ratio in microbial phospholipid fatty acids (PLFA)) both in field and laboratory experiments. We intend to developing suitable protocols to combine PLFA analyses with molecular methods, e.g. stable isotope probing (DNA-SIP; RNA-SIP), in particular for bacteria and fungi. This study aims to determine the impact of terrigenous OC input on priming effects, and hence on the aquatic-terrestrial coupling as well as their role for C-cycling in aquatic systems affected by global change. To our knowledge, this will be the first study testing for the metabolic transfer of 13C-labled OC from both, labile and recalcitrant OC-pools in one approach and hence investigating the underlying mechanisms of priming effects in aquatic ecosystems. Both C-pools will be supplied with different pulsing-regimes and nutrient-conditions to unravel effects of labile-OM-availability on recalcitrant organic matter (OM) degradation processes. In the first phase, laboratory experiments consisting of defined microorganisms with well characterized abilities to degrade defined substrates will be carried out and thus enable studies on basic mechanisms, interactions between organisms and their role for OM degradation. Special emphasis will be set on the role of fungi in aquatic mineralization processes. We first want to elucidate basic mechanisms concerning priming, synergistic effects of bacteria and fungi in these processes and quantify which parts of the OM-pool (labile vs. recalcitrant) are respired or incorporated into microbial biomass. In a second phase, the role of characterized basic mechanisms and organism-interactions for OM cycling will be studied using natural communities, different time courses of C-additions (pulsing to simulate more frequent inputs of C in aquatic systems) and different nutrient conditions in the medium (elemental stoichiometry). Later in a third phase, these studies will be extended to much more complex environmental conditions by using mesocosm-experiments (http://www.lake-lab.de/). Here we mainly want to challenge our gained knowledge from phase one and two under environmental conditions, in particular addressing particle fluxes under natural conditions. Our modular approach will enable us to elucidate the role of priming in C-cycling in the water column as well as at aquatic-terrestrial interfaces and hence to improve C-budgets in aquatic systems.
期刊论文(6)
专著(0)
科研奖励(0)
会议论文
Effects of zooplankton carcasses degradation on freshwater bacterial community composition and implications for carbon cycling
浮游动物尸体降解对淡水细菌群落组成的影响及其对碳循环的影响
DOI: 10.1111/1462-2920.14418
发表时间: 2019
期刊: bioRxiv
影响因子: --
作者: [Kolmakova, Gladyshev, Fonvielle, Ganzert, Hornick, Grossart]
通讯作者: Grossart
DOI: 10.1002/lno.10545
发表时间: 2017-09
期刊: Limnology and Oceanography
影响因子: 4.5
作者: [Keilor Rojas‐Jimenez;Jérémy A. Fonvielle;Hua Ma;H. Grossart]
通讯作者: Keilor Rojas‐Jimenez;Jérémy A. Fonvielle;Hua Ma;H. Grossart
DOI: 10.1002/lno.11242
发表时间: 2019-07-16
期刊: LIMNOLOGY AND OCEANOGRAPHY
影响因子: 4.5
作者: [Masigol, Hossein, Khodaparast, Seyed Akbar, Grossart, Hans-Peter]
通讯作者: Grossart, Hans-Peter
Ecological role of fungal parasites on benthic diatoms of polar coastal waters
Alternative states of a simple predator-prey system induced by competition between small edible and large inedible algae and fungal parasitism (APPS)
Mortality of zooplankton in lake ecosystems and its contribution to vertical carbon fluxes (ZooFlux)
Comparing phenotypic plasticity in bacterial prey traits and ecological consequences by using specialist vs. generalist strains and organic aggregates as model systems
国内基金
海外基金
Identification and quantification of primary phytoplankton functional types in the global oceans from hyperspectral ocean color remote sensing
  • 批准号:
    --
  • 项目类别:
    --
  • 资助金额:
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  • 批准年份:
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  • 负责人:
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  • 依托单位:
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  • 批准号:
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  • 资助金额:
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  • 负责人:
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玉米幼苗干旱胁迫应答NAC转录因子基因的筛选和鉴定
  • 批准号:
    31201268
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    25.0万元
  • 批准年份:
    2012
  • 负责人:
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  • 依托单位: