FG Angewandte Gewässerökologie

7 Items

Recent Submissions
Electron & Biomass Dynamics of Cyanothece Under Interacting Nitrogen & Carbon Limitations

Rabouille, Sophie ; Campbell, Douglas A. ; Masuda, Takako ; Zavřel, Tomáš ; Bernát, Gábor ; Polerecky, Lubos ; Halsey, Kimberly ; Eichner, Meri ; Kotabová, Eva ; Stephan, Susanne ; Lukeš, Martin ; Claquin, Pascal ; Bonomi-Barufi, José ; Lombardi, Ana Teresa ; Červený, Jan ; Suggett, David J. ; Giordano, Mario ; Kromkamp, Jacco C. ; Prášil, Ondřej (2021-04-09)

Marine diazotrophs are a diverse group with key roles in biogeochemical fluxes linked to primary productivity. The unicellular, diazotrophic cyanobacterium Cyanothece is widely found in coastal, subtropical oceans. We analyze the consequences of diazotrophy on growth efficiency, compared to NO3–-supported growth in Cyanothece, to understand how cells cope with N2-fixation when they also have to...

Temporal Patterns and Intra- and Inter-Cellular Variability in Carbon and Nitrogen Assimilation by the Unicellular Cyanobacterium Cyanothece sp. ATCC 51142

Polerecky, Lubos ; Masuda, Takako ; Eichner, Meri ; Rabouille, Sophie ; Vancová, Marie ; Kienhuis, Michiel V. M. ; Bernát, Gabor ; Bonomi-Barufi, Jose ; Campbell, Douglas Andrew ; Claquin, Pascal ; Červený, Jan ; Giordano, Mario ; Kotabová, Eva ; Kromkamp, Jacco ; Lombardi, Ana Teresa ; Lukeš, Martin ; Prášil, Ondrej ; Stephan, Susanne ; Suggett, David ; Zavřel, Tomas ; Halsey, Kimberly H. (2021-02-04)

Unicellular nitrogen fixing cyanobacteria (UCYN) are abundant members of phytoplankton communities in a wide range of marine environments, including those with rapidly changing nitrogen (N) concentrations. We hypothesized that differences in N availability (N2 vs. combined N) would cause UCYN to shift strategies of intracellular N and C allocation. We used transmission electron microscopy and n...

Changes in food characteristics reveal indirect effects of lake browning on zooplankton performance

Minguez, Laetitia ; Sperfeld, Erik ; Berger, Stella A. ; Nejstgaard, Jens C. ; Gessner, Mark O. (2019-11-12)

Browning caused by colored dissolved organic matter is predicted to have large effects on aquatic ecosystems. However, there is limited experimental evidence about direct and indirect effects of browning on zooplankton in complex field settings. We used a combination of an ecosystem‐scale enclosure experiment and laboratory incubations to test how prolonged browning affects physiological and li...

Methane emissions from contrasting urban freshwaters: Rates, drivers, and a whole‐city footprint

Herrero Ortega, Sonia ; Romero González‐Quijano, Clara ; Casper, Peter ; Singer, Gabriel A. ; Gessner, Mark O. (2019-09-11)

Global urbanization trends impose major alterations on surface waters. This includes impacts on ecosystem functioning that can involve feedbacks on climate through changes in rates of greenhouse gas emissions. The combination of high nutrient supply and shallow depth typical of urban freshwaters is particularly conducive to high rates of methane (CH4) production and emission, suggesting a poten...

Greenhouse gas formation and flux across boundaries in urban water bodies

Herrero Ortega, Sonia (2019)

Methane (CH4) emissions from urban fresh water are starting to be addressed. CH4 as a greenhouse gas (GHG), enhances global warming of the earth. Any anthropogenic source of this greenhouse gas should be understood in order to reduce its atmospheric concentrations. On the other side, urban areas and expanding, and they modify surface waters. Recent literature has superficially approached the ef...

Atmospheric Electricity Influencing Biogeochemical Processes in Soils and Sediments

Hunting, Ellard R. ; Harrison, R. Giles ; Bruder, Andreas ; van Bodegom, Peter M. ; van der Geest, Harm G. ; Kampfraath, Andries A. ; Vorenhout, Michel ; Admiraal, Wim ; Cusell, Casper ; Gessner, Mark O. (2019-04-16)

The Earth’s subsurface represents a complex electrochemical environment that contains many electro-active chemical compounds that are relevant for a wide array of biologically driven ecosystem processes. Concentrations of many of these electro-active compounds within Earth’s subsurface environments fluctuate during the day and over seasons. This has been observed for surface waters, sediments a...

River doctors: Learning from medicine to improve ecosystem management

Elosegi, Arturo ; Gessner, Mark O. ; Young, Roger G. (2017)

Effective ecosystem management requires a robust methodology to analyse, remedy and avoid ecosystem damage. Here we propose that the overall conceptual framework and approaches developed over millennia in medical science and practice to diagnose, cure and prevent disease can provide an excellent template. Key principles to adopt include combining well-established assessment methods with new ana...