A5056946376- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Hydrocarbon exploration and reservoir analysis
- Atmospheric chemistry and aerosols
- Soil and Water Nutrient Dynamics
- Pharmaceutical and Antibiotic Environmental Impacts
- Peatlands and Wetlands Ecology
- Coffee research and impacts
- Reservoir Engineering and Simulation Methods
- Hydrology and Watershed Management Studies
- Groundwater flow and contamination studies
- Obesity, Physical Activity, Diet
- Pesticide and Herbicide Environmental Studies
- Methane Hydrates and Related Phenomena
- Ocean Acidification Effects and Responses
- Coastal and Marine Management
- Geological and Geophysical Studies
- CO2 Sequestration and Geologic Interactions
- Agriculture Sustainability and Environmental Impact
- Coastal wetland ecosystem dynamics
- Offshore Engineering and Technologies
- Eating Disorders and Behaviors
- Water-Energy-Food Nexus Studies
- Maritime Transport Emissions and Efficiency
- Fish Ecology and Management Studies
Radboud University Nijmegen
2021-2025
Universidade Federal de Juiz de Fora
2017-2024
Radboud Institute for Molecular Life Sciences
2024
Radboud University Medical Center
2024
Instituto da Conservação da Natureza e das Florestas
2022
Uppsala University
2019-2021
Universidade Federal do Oeste do Pará
2019
Abstract Many inland waters exhibit complete or partial desiccation, have vanished due to global change, exposing sediments the atmosphere. Yet, data on carbon dioxide (CO 2 ) emissions from these are too scarce upscale for estimates understand their fundamental drivers. Here, we present results of a survey covering 196 dry across diverse ecosystem types and climate zones. We show that CO share drivers constitute substantial fraction cycled by waters. were consistent zones, with local...
The magnitude of diffusive carbon dioxide (CO2) and methane (CH4) emission from man-made reservoirs is uncertain because the spatial variability generally not well-represented. Here, we examine its drivers for partial pressure, gas-exchange velocity (k), flux CO2 CH4 in three tropical using spatially resolved measurements both gas concentrations k. We observed high within all reservoirs, with river inflow areas displaying elevated concentrations. Conversely, close to dam are characterized by...
Ditches and canals are omitted from global budgets of inland water emissions, despite research showing them to be emitters greenhouse gases (GHGs). Here, we synthesize data across climate zones land use types show, for the first time, that ditches emit notable amounts carbon dioxide (CO2) nitrous oxide (N2O). had higher per-area emissions CO2 N2O than ponds, lakes, reservoirs, likely due high nutrient inputs. Preliminary upscaling showed inclusion would increase by 0.6%-1% 3%-9%. Trophic...
Although previous studies suggest that greenhouse gas (GHG) emissions from reservoir sediment exposed to the atmosphere during drought may be substantial, this process has not been rigorously quantified. Here we determined carbon dioxide (CO2) and methane (CH4) cores a drying rewetting cycle. We found strong temporal variation in GHG with peaks when was drained (C permanently wet sediments were, respectively, 251 1646 mg m−2 d−1 for CO2 0.8 547.4 CH4) then again rewetted 456 1725mg 1.3 3.1...
Eutrophic shallow freshwater ecosystems often develop floating filamentous microalgae on their surface during spring and summer. In recent years, this phenomenon has become more pronounced due to rising temperatures drier conditions, with algae sometimes even covering the entire of water bodies. These mats, known as Floating Algal Beds (FLAB), are primarily composed phytoplankton from group Chlorophyte. New evidence suggests that can produce methane (CH₄), raising possibility these...
Reservoir sediments exposed to air due water level fluctuations are strong sources of atmospheric carbon dioxide (CO2). The spatial variability CO2 fluxes from these drawdown areas still poorly understood. In a reservoir in southeastern Brazil, we investigated whether emissions vary as function neighboring land cover types and assessed the magnitude relation nearby surface. Exposed near forestland (average = 2733 mg C m−2 day−1) emitted more than grassland 1261 day−1), congruent with...
Increased periods of prolonged droughts followed by severe precipitation events are expected throughout South America due to climate change. Freshwater sediments especially sensitive these changing conditions. The increased oscillation water levels in aquatic ecosystems causes enhanced cycles sediment drying and rewetting. Here we experimentally evaluate the effects induced drought a rewetting event on release carbon dioxide (CO2), methane (CH4), nutrients (nitrogen phosphorus), trace...
Abstract An increasing number of rivers is being dammed, particularly in the tropics, and reservoir water surfaces can be a substantial anthropogenic source greenhouse gases. On average, 80% CO 2 ‐equivalent emission reservoirs globally has been attributed to CH 4 , which predominantly emitted via ebullition. Since ebullition highly variable across space time, both measuring upscaling an entire challenging, estimates are therefore not well constrained. We measured at high spatial resolution...
Abstract. Reservoir sediments sequester significant amounts of organic carbon (OC), but at the same time, high methane (CH4) can be produced and emitted during degradation sediment OC. While greenhouse gas emission reservoirs has received a lot attention, there is lack studies focusing on OC burial. In particular, are no reservoir burial in Amazon, even though hydropower expanding basin. Here we present results from first investigation CH4 concentrations an Amazonian hydroelectric reservoir....
Abstract The patterns of spatial and temporal variability in CO 2 CH 4 emission from reservoirs are still poorly studied, especially tropical regions where hydropower is growing. We performed spatially resolved measurements dissolved surface water concentrations their gas‐exchange coefficients ( k ) to compute diffusive carbon flux four contrasting across Brazil during different hydrological seasons. used an online equilibration system measure concentrations; we estimated floating chamber...
Dredging, the removal of sediment from water courses, is generally conducted to maintain their navigability and improve quality. Recent studies indicate that dredging can significantly reduce aquatic greenhouse gas (GHG) emissions. These studies, however, do not consider potential emission dredged material (sludge) in depot. In addition, it unknown if how GHG emissions sludge depots be reduced. Here we present spatiotemporal variations carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O)...
Aquatic ecosystems are large contributors to global methane (CH4) emissions. Eutrophication significantly enhances CH4-production as it stimulates methanogenesis. Mitigation measures aimed at reducing eutrophication, such the addition of metal salts immobilize phosphate (PO43-), now common practice. However, effects remedies on methanogenic and methanotrophic communities-and therefore CH4-cycling-remain largely unexplored. Here, we demonstrate that Fe(II)Cl2 addition, used PO43- binder,...
Aquatic ecosystems are under different anthropogenic pressures, such as climate change, eutrophication, chemical pollution, overfishing, and introducing exotic species. Human activities have accelerated biogeochemical cycles forcing organisms to adapt. Most ecological stoichiometry studies focused on carbon, nitrogen, phosphorus, their relative proportions. Still, the possibilities for investigations using other elements better understand impacts of human pressures aquatic vast. Therefore,...
A growing body of literature points to drawdown areas as important sources atmospheric CO2 within reservoirs. Yet seasonal and temporal patterns flux from periodically exposed sediments in remain poorly understood. Here we evaluate the annual diel (24-hour cycle) variations emissions atmosphere. We sampled area a tropical reservoir, which encompassed two primary adjacent land covers—grassland forestland—in watershed reservoir located southeastern Brazil. also experimentally assessed effect...
Recent studies indicate that greenhouse gas (GHG) emissions from agricultural drainage ditches can be significant on a per-unit area basis, but spatiotemporal investigations are still limited. Additionally, the impact of dredging - common management in such environments ditch GHG is largely unknown. This study presents year-round nine dairy farm center Netherlands, where each year, approximately half dredged alternating cycles. We measured monthly diffusive fluxes carbon dioxide (CO