|Telefon: 0521 106 2703|
|Since July 2014||Post-doc fellow of the Alexander von Humboldt foundation at the department of Animal Ecology, Bielefeld University, Germany.|
|02/2014 - 04/2014||Research Associate at EcoLab UMR 5245, University Paul Sabatier, Toulouse, France. Supported by a CNRS &ndash FRB funding: Data analyses and modelling of the biogeochemical cycle of Silica in the Scheldt Estuary.|
|2011 - 2013||Lecturer (ATER) at EcoLab UMR 5245, University Paul Sabatier, Toulouse, France.|
|2008 - 2011||PhD student at EcoLab UMR 5245, University Paul Sabatier, Toulouse, France.
PhD thesis: Meiofauna in river epilithic biofilm: Dynamics and trophic relationships.
|2006 - 2008||MSc student in Ecology and Evolution of Interactions at University of Perpignan, France.
MSc thesis: Expression of secondary metabolites by the Mediterranean sponges Aplysina aerophoba and Aplysina cavernicola.
|2002 - 2005||BSc student in Biology and Ecology at University Paul Sabatier, Toulouse, France.|
Food web ecology of aquatic detritus-based ecosystems: Including minute actors to complete the picture
Minute organisms are diverse, abundant and perform key functions in ecosystems. As such they can provide relevant empirical clues to feed and test general ecological theoretical framework. However, a small size does not ease manipulation and taxonomical assessment. Although new techniques such as metagenomics and stable isotopic probing have begun to open the 'microbial black box', research gaps still persist however, and it is becoming urgent to assess, not only the genuine role of bacteria, but also that of protozoans and micro-metazoans (e.g. aquatic meiofauna). Because decomposition of terrestrial detritus (e.g. plant litter) is a key function of forested stream ecosystems, this research project basically aims at 'completing the picture' of instream decomposition processes by including protozoans and meiofauna in a realistic and highly resolved food web. To challenge this aim, both in situ integrative and laboratory targeted approaches are planned, using cutting-edge methods such as compound specific stable isotope analysis and metagenomics. More specifically, outcomes of this project would shed light on so far neglected functional role of meiofauna and protozoans in the partitioning and trophic transfer of decomposition products. In an integrative context, this project will also concern predator-prey interactions &ndash in the widest sense &ndash by exploring direct and indirect pathways of predator controls on decomposition dynamics. This project is expected to help disentangle the strength of trophic versus non-trophic interactions &ndash especially at the smallest scale and in complex litter habitats, where predator foraging success is expected to be highly constrained by micro-habitat features and by antipredator responses of prey.
Traunspurger, W., N. Reiff, V. Krashevska, N. Majdi & S. Scheu (2017): Diversity and distribution of soil micro-invertebrates across an altitudinal gradient in a tropical montane rainforest of Ecuador, with focus on free-living nematodes. Pedobiologica, 62, 28-35
Majdi, N. & Traunspurger, W. (2017): Meiofauna. In Methods in Stream Ecology, Volume 1 (Third Edition), Ecosystem Structure, Editor: Hauer, r.H. & Lamberti, G.A.
Majdi, N.; Threis, I. & Traunspurger, W. (2017): It's the little things that count: Meiofaunal density and production in the sediment of two headwater streams.Limnology and Oceanography 62 (1): 151-163.
Majdi, N.; Kreuzinger-Janik, B. & Traunspurger, W. (2016): Effects of flatworm predation on sediment communities and ecosystem functions: a microcosm approach. Hydrobiologia 776 (1): 193-207.
Majdi, N.; Michiels, I.C. & Traunspurger, W. (2016): Resource depletion affects the structure of an experimental benthic food web.Limnologica 59: 99-108.
Sow M. M., Majdi N., Muylaert K., Tackx M., Julien F., Probst J.-L., Mialet B., Sutra C., Probst A., Thébault J.-M., Kenarlikdjian M. & M. Gérino (in press): Retention of nutrients, suspended particulate matter and phytoplankton in a pondage associated with a run-of-the-river type hydroelectric power plant Ecohydrology.
Traunspurger W., Threis I. & N. Majdi (in press): Vertical and temporal distribution of free-living nematodes dwelling in two sandy-bed streams fed by helocrene springs Nematology.
Kreuzinger-Janik B., Schroeder F., Majdi N. & W. Traunspurger (2015): Depth-related effects on a meiofaunal community dwelling in the periphyton of a mesotrophic lake PLOS ONE 10: e0137793.
Gilarte P., Kreuzinger-Janik B., Majdi N. & W. Traunspurger (2015): Life-history traits of the model organism Pristionchus pacificus recorded using the hanging drop method: Comparison with Caenorhabditis elegans PLOS ONE 10: e0134105.
Majdi N., Traunspurger W., Richardson J.S. & A. Lecerf (2015): Small stonefly predators affect microbenthic and meiobenthic communities in stream leaf packs Freshwater Biology 60: 1930-1943.
Majdi N., Boiche A., Traunspurger W. & A. Lecerf (in press): Community patterns and ecosystem processes in forested headwater streams along a gradient of riparian canopy openness Fundamental and Applied Limnology.
Majdi, N. & W. Traunspurger (2015): Free-living nematodes in the freshwater food web: A review Journal of Nematology 47: 28-44.
Liu Y., Majdi N., Tackx M., Dauta A., Gérino M., Julien F., Buffan-Dubau E. (2015): Short-term effects of nutrient enrichment on river biofilm: N – NO3- uptake rate and response of meiofauna. Hydrobiologia 744: 165-175.
Majdi N., Bardon L., Gilbert F. (2014): Quantification of sediment reworking by the freshwater clam Corbicula fluminea Müller, 1774. Hydrobiologia 732: 85-92.
Graba M., Sauvage S., Majdi N., Mialet B., Moulin F.Y., Urrea-Clos G., Buffan-Dubau E., Tackx M., Sabater S., Sanchez-Pérez J.M. (2014): Modelling epilithic biofilms combining hydrodynamics, invertebrate grazing and algal traits. Freshwater Biology 56: 213-1228.
Majdi N., Boiché A., Traunspurger W., Lecerf A. (2014): Predator effects on a detritus-based food web are primarily mediated by nontrophic interactions. Journal of Animal Ecology 83: 953-962.
Kazemi-Dinan A., Schroeder F., Peters L., Majdi N., Traunspurger W. (2014): The effect of trophic state and depth on periphytic nematode communities in lakes. Limnologica 44: 49-57.
Mialet B., Majdi N., Tackx M., Tekwani N., Azémar F., Buffan-Dubau E. (2013): Selective feeding of Bdelloid rotifers in river biofilms. PLoS One 8(9): e75352.
Tekwani N., Majdi N., Mialet B., Tornés E., Urrea-Clos G., Buffan-Dubau E., Sabater S., Tackx M. (2013): Contribution of epilithic diatoms to benthic-pelagic coupling in a temperate river. Aquatic Microbial Ecology 69: 47-57.
Majdi N., Tackx M., Buffan-Dubau E. (2012): Trophic positioning and microphytobenthic carbon uptake of biofilm-dwelling meiofauna in a temperate river. Freshwater Biology 57: 1180-1190.
Majdi N., Mialet B., Boyer S., Tackx M., Leflaive J., Boulêtreau S., Ten-Hage L., Julien F., Fernandez R., Buffan-Dubau E. (2012): Relationship between an epilithic biofilm and its associated meiofauna under two patterns of flood disturbance in the Garonne river (France). Freshwater Science 31: 38-50.
Majdi N., Tackx M., Traunspurger W., Buffan-Dubau E. (2012): Feeding of biofilm-dwelling nematodes examined using HPLC-analysis of gut pigment contents. Hydrobiologia 680: 219-232.
Majdi N., Traunspurger W., Boyer S., Mialet B., Tackx M., Fernandez R., Gehner S., Ten-Hage L., Buffan-Dubau E. (2011): Response of biofilm-dwelling nematodes to habitat changes in the Garonne River, France: influence of hydrodynamics and microalgal availability. Hydrobiologia 673: 229-244.
Liu Y., Majdi N., Tackx M. & Buffan-Dubau E. (2013): Influence of meiofauna on the ability of biofilms to improve water quality of rivers. 15th International Meiofauna Conference (July 2013, Seoul, South Korea).
Majdi N., Boiché A., Traunspurger W., Lamothe S., Lambrigot D. & Lecerf A. (2013): A predator provides its prey with 'well-being': case of a flatworm foraging in headwater leaf packs. 8th Symposium for European Freshwater Sciences (July 2013, Münster, Germany).
Buffan-Dubau E., Majdi N., Mialet B., Boyer S., Leflaive J., Boulêtreau S., Ten-Hage L., Julien F., Fernandez R. & Tackx M. (2011): Relationship between an epilithic biofilm and its associated meiofauna under two patterns of flood disturbance in the Garonne River (France). 7th Symposium for European Freshwater Sciences (June 2011, Girona, Spain).
Majdi N., Mialet B., Tackx M., Traunspurger W. & Buffan-Dubau E. (2011): Natural feeding habits of biofilm-dwelling nematodes studied with a multi-method approach. 7th Symposium for European Freshwater Sciences (June 2011, Girona, Spain). Awarded for the best student presentation (3rd place)
Tekwani N., Tornés E., Urrea-Clos G., Majdi N., Buffan-Dubau E., Sabater S. & Tackx M. (2011): Contribution of epilithic diatoms to benthic-pelagic coupling in the Garonne River (France). [Poster] 7th Symposium for European Freshwater Sciences (June 2011, Girona, Spain).
Majdi N., Mialet B., Buffan-Dubau E., Traunspurger W., Azémar F., Van Burm E., Souissi A., Lionard M., Muylaert K. & Tackx M. (2010): Test of a selective feeding model for meiofauna in a river epilithic biofilm. 14th International Meiofauna Conference (July 2010, Ghent, Belgium).
Mialet B., Majdi N., Traunspurger W., Boyer S., Tackx M. , Julien F., Fernandez R., Leflaive J. , Ten-Hage L., Boulêtreau S. & Buffan-Dubau E. (2010): Temporal dynamics of epilithon-associated meiobenthos in the Garonne river (SW France). [Poster] 14th International Meiofauna Conference (July 2010, Ghent, Belgium). Awarded for the best poster presentation (1st place)
Becerro M.A., Sacristan-Soriano O., Majdi N. & Banaigs B. (2009): Relevant scale of chemical variation in Aplysina aerophoba. 6th European Conference on Marine Natural Products (July 2009, Porto, Portugal).