Dr. Anne-Gret Seifert
- Dr. Anne-Gret Seifert
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Dr. Anne-Gret Seifert
Justus Liebig Universität
IFZ - Department of Animal Ecology
Heinrich-Buff-Ring 26-32
D-35392 Giessen
GermanyTel: +49(0)641/ 99-35701
Anne-Gret.Seifert@allzool.bio.uni-giessen.de
- Research Interests
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Research Interests
In rivers and streams, biofilms are major sites of carbon cycling. They retain large amounts of dissolved organic carbon (DOC) and consequently are most important for the development of aquatic organisms on higher trophic levels. Besides autochthonous primary production, which supports heterotrophic production in biofilms, large amounts of organic carbon (OC) are derived from the surrounding catchment areas. More precipitation and more frequent and severe floods due to climate change will increase the transport of material into streams. Moreover, catchment characteristics including vegetation affect the transport and nature of DOC into aquatic ecosystems. Thus, carbon dynamics depend on how a stream is embedded within and interacts with its surrounding terrestrial environment. Despite its importance for carbon cycling it is not understood to which extent autochthonous or allochthonous carbon is used in biofilms and how increased addition of allochthonous carbon determines the relative use of both carbon sources. The combined application of 13C and14C analyses on differently labeled DOC sources intend to answer to which extent DOC from different sources is used by bacteria in biofilms and finally transported to higher trophic levels. The use of 13C and 14C signals on carbon compounds and biomarkers is an excellent method to determine carbon sources for microorganisms and the transport of labeled material within the food web.
- Curriculum vitae
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Curriculum vitae
Since 2013
Researcher at the University Gießen within the framework of the DFG-funded project: The impact of precipitation intensity and vegetation in the catchment area on autochthonous and allochthonous carbon transfer in stream biofilm food Since 2010
Researcher at the Max Planck Institute for Biogeochemistry Jena within the QUASOM-project (Quantifying and modelling pathways of soil organic matter as affected by abiotic factors, microbial dynamics and transport processes) 07. 2010
Dissertation at the Max-Planck Institute for Biogeochemistry Jena
Topic: Function of microorganisms in black slate degradation
University of California/Irvine: Performing of compound
specific 14C analysis09. 2005
University Greifswald
Study Landscape Ecology
Degree: Diploma
Main subject: Aquatic Ecology
Degree project: Emissions of greenhouse gases from a constructed wetland and surrounding pasture – the impact of temperature, nitrate and glucose01. 2004 - 06. 2005 Exchange student at Lund University supported by the ERASMUS programme
Advanced courses in Aquatic Ecology, Ecotoxicolgy and Methods of Quaternary geology
- Publications
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Publications
Seifert, A.-G., Trumbore, S., Xu, X.,Zhang, D., Gleixner, G. Plant colonization negatively correlates with uptake of black slate derived carbon into microbial PLFA. Geochimica et Cosmochimica Acta 106 (2013) 391-403
Risse-Buhl, U., Trefzger, N., Seifert, A.-G., Schönborn, W., Gleixner, G., Küsel, K. Tracking the autochthonous carbon transfer in stream biofilm food webs. FEMS Microbiology Ecology 79 (2012) 118–131.
Seifert, A.-G., Trumbore, S., Xu, X., Zhang, D., Kothe, E., Gleixner, G. Variable effects of labile carbon on the carbon use of different microbial groups in black slate degradation. Geochimica et Cosmochimica Acta 75 (2011) 2557–2570.
Stadmark, J., Seifert, A.-G., Leonardson, L. Transforming meadows into free surface water wetlands: Impact of increased nitrate and carbon loading on greenhouse gas production. Atmospheric Environment 43 (2009) 1182-1188.