Publication
Combined Earth observations reveal the sequence of conditions leading to a large algal bloom in Lake Geneva
Publications associées (33)
Wintertime Coastal Upwelling in Lake Geneva: An Efficient Transport Process for Deepwater Renewal in a Large, Deep Lake
David Andrew Barry, Ulrich Lemmin, Andrea Cimatoribus, Rafael Sebastian Reiss
Combining field measurements, 3‐D numerical modeling, and Lagrangian particle tracking, we investigated wind‐driven, Ekman‐type coastal upwelling during the weakly stratified winter period 2017/2018 in Lake Geneva, Western Europe's largest lake (max. depth ...
2020Global warming affects nutrient upwelling in deep lakes
Alfred Johny Wüest, Robert Vincent Schwefel
Measures to reduce lake phosphorus concentrations have been encouragingly successful in many parts of the world. After significant eutrophication in the twentieth century, nutrient concentrations have declined in many natural settings. In addition to these ...
2019Deep-water coastal upwelling events during wintertime in a large lake (Lake Geneva)
David Andrew Barry, Ulrich Lemmin, Andrea Cimatoribus, Rafael Sebastian Reiss
Convective winter cooling is an important process in the annual cycle of a lake ecosystem, because it brings oxygen to the deeper layers. However, in deep lakes, convective processes are often not strong enough to extend the mixing down to the deepest laye ...
2019Bacteria-induced mixing in natural waters
Alfred Johny Wüest, Oscar Rodrigo Sepúlveda Steiner, Talia Ekin Tokyay Sinha
Swimming organisms can enhance mixing in their natural environments by creating eddies in their wake and by dragging water along. However, these mixing mechanisms are inefficient for microorganisms, because swimming-induced variations in velocity, temperat ...
2017The Chaoborus pump: Migrating phantom midge larvae sustain hypolimnetic oxygen deficiency and nutrient internal loading in lakes
Hypolimnetic oxygen demand in lakes is often assumed to be driven mainly by sediment microbial processes, while the role of Chaoborus larvae, which are prevalent in eutrophic lakes with hypoxic to anoxic bottoms, has been overlooked. We experimentally meas ...
Elsevier2017Effects of climate change on deep-water oxygen and winter mixing in a deep lake (Lake Geneva)
Alfred Johny Wüest, Damien Bouffard, Robert Vincent Schwefel
Oxygen is the most important dissolved gas for lake ecosystems. Because low oxygen concentrations are an ongoing problem in many parts of the oceans and numerous lakes, oxygen depletion processes have been intensively studied over the last decades and were ...
2016Allelopathic Activity of the Iron Chelator Anachelin-A Molecular Hybrid with a Dual Mode of Action
One of the compounds suggested to be responsible for the cyanobacterial dominance over competing green algae is identified. Evidence is provided on the molecular, chemical level that the iron chelator anachelin from the cyanobacterium Anabaena cylindrica p ...
Wiley-V C H Verlag Gmbh2016Effects of climate change on deepwater oxygen and winter mixing in a deep lake (Lake Geneva): Comparing observational findings and modeling
Alfred Johny Wüest, Damien Bouffard, Robert Vincent Schwefel, Adrien Gaudard
Low concentrations of dissolved oxygen remain a global concern regarding the ecological health of lakes and reservoirs. In addition to high nutrient loads, climate-induced changes in lake stratification and mixing represent additional anthropogenic menace ...
American Geophysical Union2016Are flood-driven turbidity currents hot spots for priming effect in lakes?
In deep stratified lakes, such as Lake Geneva, flood-driven turbidity currents are thought to contribute to the replenishment of deep oxygen by significant transport of river waters saturated with oxygen into the hypolimnion. The overarching aim of this st ...
Copernicus GmbH2016Generalized receptor law governs phototaxis in the phytoplankton Euglena gracilis
Andrea Rinaldo, Andrea Giometto, Amos Maritan, Florian Altermatt
Phototaxis, the process through which motile organisms direct their swimming toward or away from light, is implicated in key ecological phenomena (including algal blooms and diel vertical migration) that shape the distribution, diversity, and productivity ...
Natl Acad Sciences2015