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Featured Publications

High irradiation and low discharge promote the dominant role of phytoplankton in riverine nutrient dynamics

Kamjunke, N., Rode, M., Baborowski, M., Kunz, J.V., Zehner, J., Borchardt, D., Weitere, M.

Riverine nutrient dynamics dominated by phytoplankton
In Lagrangian samplings we observed a longitudinal increase of phytoplankton biomass, a decrease of dissolved nutrient concentrations, and high rates of nitrate assimilation at low discharge in summer. Rising molar C:P ratios of seston indicated a phosphorus limitation of phytoplankton. Global radiation combined with mixing depth had a strong predictive power to explain maximum chlorophyll concentration.
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Hydromorphologic sorting of in-stream nitrogen uptake across spatial scales …

Risse-Buhl, U., Anlanger, C., Noss, C., Lorke, A., von Schiller, D., Weitere, M. (2020) Ecosystems. doi: 10.1007/s10021-020-00576-7

Hydromorphologic sorting of in-stream nitrogen uptake across spatial scales …

Whole-reach 15N ammonium injection experiments were performed to better understand the effects of hydromorphology and other environmental constraints, across three spatial scales: micro, meso and reach. Our results reveal the important role of hydromorphologic sorting of primary uptake compartments at mesoscale as a controlling factor for reach-scale N uptake in streams.
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Near streambed flow shapes microbial guilds within and across trophic levels in fluvial biofilms ...

Risse-Buhl, U., Anlanger, C., Chatzinotas, A., Noss, C., Lorke, A., Weitere, M., (2020), Limnol. Oceanogr. 65(6). doi:10.1002/lno.11451

Near streambed flow shapes microbial guilds within and across trophic levels in fluvial biofilms
This study links flow heterogeneity in mountainous stream ecosystem to the diversity and functioning of fluvial biofilms. With increasing flow fluvial biofilms shifted towards increasing autotrophy, while trophic structure shifted towards a decreasing importance of grazer control.
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Streamside mobile mesocosms (MOBICOS): A new modular research infrastructure for hydro-ecological process studies across catchment-scale gradients ...

Fink, P., Norf, H., Anlanger, C., Brauns, M., Kamjunke, N., Risse-Buhl, U., Schmitt-Jansen, M., Weitere, M., Borchardt, D., (2020), Int. Rev. Hydrobiol. 105 (3-4). doi:10.1002/iroh.201902009

Streamside mobile mesocosms (MOBICOS)
MOBICOS is UFZ's research infrastructure that allows analysing the effects of stressors and stressor combinations through multifactorial experiments in near natural settings and across anthropogenic pressure gradients combined with in situ real time monitoring. It has the potential to advance our understanding of causal relationships between natural environmental oscillations, anthropogenic stressors and their combined ecological impacts on aquatic ecosystems.
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Metatranscriptomics from a small aquatic system: microeukaryotic community functions through the diurnal cycle ...

Trench-Fiol, S., Fink, P. (2020), Front. Microbiol. 11:1006. doi:10.3389/fmicb.2020.01006

Metatranscriptomics from a small aquatic system
Aquatic Microbial Ecology: Diurnal cycles of protist community ecosystem functions in a pond. Combining a metatranscriptomics approach with environmental measurements yields insights into the functional metabolic processes performed by the microeukaryotic community of a small freshwater ecosystem that had so far been only investigated on the open ocean scale.
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