A5024652636- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Hydrology and Watershed Management Studies
- Fish Biology and Ecology Studies
- Water-Energy-Food Nexus Studies
- Plant and animal studies
- Aquatic Invertebrate Ecology and Behavior
- Fish biology, ecology, and behavior
- Freshwater macroinvertebrate diversity and ecology
- Plant Diversity and Evolution
- Fecal contamination and water quality
- Transboundary Water Resource Management
- Flood Risk Assessment and Management
- Plant Pathogens and Fungal Diseases
- Hydraulic flow and structures
- Reproductive biology and impacts on aquatic species
- Plant and Fungal Species Descriptions
- Land Use and Ecosystem Services
- Peatlands and Wetlands Ecology
- Marine and Offshore Engineering Studies
- Child Nutrition and Water Access
- Coastal and Marine Management
- Water Quality Monitoring Technologies
- Insect-Plant Interactions and Control
- Marine animal studies overview
BOKU University
2018-2024
Bucknell University
2018-2023
Norsk Hydro (Germany)
2022
Bundesamt für Wasserwirtschaft
2022
University of Lisbon
2018-2021
Abstraction, diversion, and storage of flow alter rivers worldwide. In this context, minimum regulations are applied to mitigate adverse impacts protect affected river reaches from environmental deterioration. Mostly, however, only selected instream criteria considered, neglecting the floodplain as an indispensable part fluvial ecosystem. Based on essential functions processes unimpaired temperate rivers, we identify fundamental principles which must adhere determine truly...
Peak-operating hydropower plants are usually the energy grid’s backbone by providing flexible production. At same time, hydropeaking operations considered one of most adverse impacts on rivers, whereby aquatic organisms and their life-history stages can be affected in many ways. Therefore, we propose specific seasonal regulations to protect ecologically sensitive life cycle stages. By reviewing literature, establish a framework for hydrological mitigation based salmonid fish relationship...
Abstract Hydropeaking mitigation based on down‐ramping thresholds is crucial to avoid stranding of fish and ensure sustainable hydropower production. However, the risk influenced by several biotic abiotic factors that interact with ramping rate, including river morphology baseflow magnitude. Also, at bar scale, lateral or horizontal velocity may be even greater importance than vertical one as prior integrates morphology. This study investigates connection between ecologically relevant...
Rivers of the large Alpine valleys constitute iconic ecosystems that are highly threatened by multiple anthropogenic stressors. This stressor mix, however, makes it difficult to develop and refine conservation restoration strategies. It is, therefore, urgent acquire more detailed knowledge on consequences interactions prevalent stressors fish populations, in particular, indicator species such as European grayling Thymallus thymallus. Here, we conducted a multi-river, multi-stressor...
As the share of renewable energy grows worldwide, flexible production from peak-operating hydropower and phenomenon hydropeaking have received increasing attention. In this study, we collected open research questions 220 experts in river science, practice, policy across globe using an online survey available six languages related to hydropeaking. We used a systematic method determining expert consensus (Delphi method) identify 100 high-priority following thematic fields: (a) hydrology, (b)...
Research on how intermittent water releases from hydropower plants affect the early life stages of fish has advanced in last years, focusing not only direct impacts rapid flow changes (hydropeaking), but also short-term fluctuations temperature (thermopeaking). Flow and thermal caused by hydropeaking may movement patterns migration at critical a species' cycle, e.g., inducing passive downstream drift. Using two experimental outdoor channels, we investigated nase (Chondrostoma nasus,...
Abstract Intermittent water releases from hydropower plants, called hydropeaking, negatively affect river biota. The impacts mainly depend on hydrological alterations, but changes in physical habitat conditions are suspected to be co‐responsible. For example, hydropeaking accompanied by a sudden change of temperature the downstream river—called thermopeaking—is also presumed impair aquatic ecosystems. Still, knowledge about these thermopeaking species and life‐stages is limited. We performed...
River networks are interconnected systems comprising streams, rivers, floodplains, and groundwater bodies. They highly sensitive to multiple pressures on global, regional, local scales. Changes within these do not only compromise ecosystem integrity functionality but also jeopardize critical services water resource availability, with significant societal consequences.DANUBIUS Austria aims establish a network of advanced river observatories in the Upper Danube catchment generate...
Tropical wetlands are important climate regulators. However, their regulating function is at risk by land-use conversion for agricultural purposes. In sub-Saharan Africa, studies investigating the effect of change in and associated soil greenhouse gas (GHG) emissions remain limited. Moreover, influence season GHG with has hardly been studied. Therefore, we investigated methane (CH4), carbon dioxide (CO2), nitrous oxide (N2O) from a Kenyan wetland adjacent areas converted to farmland during...
Abstract Unnatural changes in river flow patterns resulting from peak‐operating hydropower plants adversely impact freshwater ecosystems. In particular, the rapid dewatering of shoreline habitats during artificial down‐ramping puts early fish life stages at a high risk becoming stranded if they fail to follow receding water levels time. While extensive research has been conducted on effects hydropeaking salmonid species, there is limited knowledge diverse cyprinid family, particularly...
Abstract Specific concepts of fluvial ecology are well studied in riverine ecosystems the temperate zone but poorly investigated Afrotropical region. Hence, we examined longitudinal zonation fish and adult caddisfly (Trichoptera) assemblages endorheic Awash River (1,250 km length), Ethiopia. We expected that species structured along environmental gradients, reflecting pattern large-scale freshwater ecoregions. applied multivariate statistical methods to test for differences spatial...
Downstream displacement and stranding of fish are key impacts in hydropeaked rivers, adversely affecting the organisms and, subsequently, population. While these phenomena have been extensively studied for salmonid fish, few studies conducted on cyprinids, particularly at heterogeneous river banks that provide nursery areas earliest life cycle stages. This study examines effects rapid flow decreases (i.e., down-ramping) downstream common nase, Chondrostoma nasus, larvae two bank morphologies...
Rivers worldwide have been transformed into fragmented, impounded, channelized, and flow-regulated ecosystems. These anthropogenic transformations can reduce fish distribution population status, especially of those species belonging to medium- or long-distance migratory guilds dependent on free-flowing rivers intact sediment habitat conditions. Here, we aim understand how different hydro-morphological pressure types affect the status key potamodromous rheophilic lithophilic guilds, barbel (...
Rapid water level decreases due to hydropeaking are known negatively affect riverine biota, mainly the stranding of organisms in river bank area that becomes regularly dewatered. Even though studies last decades have focused on salmonid fish, also cyprinids may be affected. However, limited knowledge is available this fish family. Therefore, we conducted mesocosm experiments under semi-natural conditions, simulating single events at two different lateral slopes (2% and 5%) with varying...
Research and management of hydropeaked rivers largely overlook the ecological impacts recurring flow fluctuations, such as fish stranding, on ecosystem health. This article synthesizes scientific grey literature, field studies, experiments to assess effects frequent hydropeaking fish. Findings show that frequency significantly affects integrity alpine rivers, with an average three daily down-ramping events. Despite some evidence behavioral adaptation recurrent this appears insufficient...
Downstream-migrating fish in rivers tend to follow the main current, and are danger of swimming through turbines at run-of-river hydropower plants, possibly causing high mortality rates. To avoid these losses, must be prevented from entering turbines. Most existing vertical bar rack systems (used for turbine protection) however usually do not ensure proper protection due large spacings. FishProtector technology enables retrofitting racks (i.e., mechanical barrier) with additional electrodes...
The dioecious and andromonoecious Solanum taxa (the "S. dioicum group") of the Australian Monsoon Tropics have been subject phylogenetic taxonomic study for decades, yet much their basic biology is still unknown. This especially true plant-animal interactions, including influence fruit form calyx morphology on seed dispersal. We combine field/greenhouse observations specimen-based with analysis seven nuclear regions obtained via a microfluidic PCR-based enrichment strategy high-throughput...
Numerous anthropogenic stressors impact rivers worldwide. Hypoxia, resulting from organic waste releases and eutrophication, occurs very commonly in Mediterranean rivers. Nonetheless, little is known about the effects of deoxygenation on behavior freshwater fish. To fill this knowledge gap, we assessed three different dissolved oxygen levels (normoxia, 48.4%, 16.5% saturation) kinematics indicators (swimming velocity, acceleration, distance traveled) shoaling cohesion adult Iberian barbel,...
In today’s intrinsically connected world, the Water–Food–Energy–Climate Nexus (WFEC Nexus) concept provides a starting point for informed and transparent decision-making based on trade-offs synergies between different sectors, including aquatic ecosystems, food security, energy production, climate neutrality. The WFEC approach is particularly applicable in regions requiring transboundary water management, such as Central Asia. Unfortunately, this region with unevenly distributed...