A5022839667- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Algal biology and biofuel production
- Aquatic Ecosystems and Biodiversity
- Marine and coastal plant biology
- Diatoms and Algae Research
- Fish Ecology and Management Studies
- Biocrusts and Microbial Ecology
- Aquatic Invertebrate Ecology and Behavior
- Microbial Community Ecology and Physiology
- Probiotics and Fermented Foods
- Freshwater macroinvertebrate diversity and ecology
- Food Safety and Hygiene
- Soil and Water Nutrient Dynamics
- Protist diversity and phylogeny
- Marine and environmental studies
- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Biodiesel Production and Applications
- Water Quality Monitoring and Analysis
- Isotope Analysis in Ecology
- Water Quality and Pollution Assessment
- Photosynthetic Processes and Mechanisms
- Sensory Analysis and Statistical Methods
- Microplastics and Plastic Pollution
University of Vienna
2016-2025
Massey University
2019
Department of Primary Industries, Parks, Water and Environment
2019
Finnish Environment Institute
2016
Universität Innsbruck
2014
Vienna Institute for Nature Conservation & Analyses
2003
The depletion of fossil fuel reserves has resulted from their application in the industrial and energy sectors. As a result, substantial efforts have been dedicated to fostering shift fuels renewable sources via technological advancements processes. Microalgae can be used produce biofuels such as biodiesel, hydrogen, bioethanol. are particularly suitable for hydrogen production due rapid growth rate, ability thrive diverse habitats, resolve conflicts between food production, capacity capture...
Estimating algal biomass is a prerequisite for monitoring growth of microalgae. Especially large-scale production sites, the measurements must be robust, reliable, fast and easy to obtain. We compare relevant parameters, discuss potential hurdles provide recommendations tackle these issues. The focus on optical density in vivo autofluorescence chlorophyll, which have proven ideal candidates purposes. Beyond biomass, cell vitality also crucial maintaining cultures. While maximizing yield...
The physico-chemical properties of water samples from the two athalassic endorheic lakes Bogoria and Nakuru in Kenya were analysed. Surface taken between July 2008 October 2009 weekly intervals each lake. following parameters determined: pH, salinity, electric conductivity, dissolved organic carbon (DOC), major cations (FAAS ICP-OES) anions (IC), as well certain trace elements (ICP-OES). Samples superficial sediments examined using Instrumental Neutron Activation Analysis (INAA) for their...
The presence of high salinity levels in textile wastewater poses a significant obstacle to the process decolorizing azo dyes. present study involved construction yeast consortium HYC, which is halotolerant and was recently isolated from wood-feeding termites. HYC mainly comprised Sterigmatomyces halophilus SSA-1575 Meyerozyma guilliermondii SSA-1547. developed demonstrated decolourization efficiency 96.1% when exposed concentration 50 mg/l Reactive Black 5 (RB5). significantly decolorized...
Phytoplankton photosynthetic characteristics in the Kenyan Rift Valley lakes Bogoria, Nakuru and Elmentaita were studied between November 2003 February 2005. In these world-famous saline–alkaline lake systems, long-term continuous monitoring photoautotrophic primary productivity modelling have been done for first time. High light attenuation coefficients observed with means around 13 m−1 reflecting huge phytoplankton biomass. No photoinhibition was field measurements. values of...
Temporal changes in total alkalinity, ionic composition and nutrient concentrations were studied the saline, alkaline endorheic Kenyan Rift Valley Lakes Bogoria, Nakuru Elmentaita to understand association of these variables with phytoplankton community structure. In total, 24 taxa found, L. Bogoria having fewest species. Although cyanobacterium Arthrospira fusiformis dominated biomass, especially other groups came into play during high water levels Elmentaita. Cluster analysis based on...
Trophic cascade effects occur when a food web is disrupted by loss or significant reduction of one more its members. In East African Rift Valley lakes, the Lesser Flamingo on top short chain. At irregular intervals, dominance their most important source, cyanobacterium Arthrospira fusiformis, interrupted. Bacteriophages are known as potentially controlling photoautotrophic bacterioplankton. Lake Nakuru (Kenya), we found highest abundance suspended viruses ever recorded in natural aquatic...
Our laboratory study looked into how pesticides affect the foraminifera species Heterostegina depressa and their obligatory algal endosymbionts. We incubated separately with different types of at varying concentrations (1 %, 0.01 % 0.0001 %); we included insecticide Confidor© (active substance: imidacloprid), fungicide Pronto©Plus (tebuconazole), herbicide Roundup© (glyphosate). evaluation focused on symbiont's photosynthetically active area (PA), uptake dissolved inorganic carbon (DIC)...
Contaminations are challenging for monocultures, as they impact the culture conditions and thus influence growth of target organism overall biomass composition. In phycology, axenic cultures comprising a single living species commonly strived both basic research industrial applications, because contaminants reduce significance analytic purposes interfere with safety quality commercial products. We aimed to establish Limnospira fusiformis, known food additive "Spirulina". Axenicity is it...
Oral bacterial pathogens, including Bacillus species, form biofilms that enhance antibiotic resistance, promote adherence, and maintain structural integrity. The ability of bacteria to is directly linked several oral diseases, gingivitis, dental caries, periodontitis, periapical peri-implantitis. These act as a predisposing factor for such infections. Nanoparticles, known their strong antibacterial properties, can target specific biofilm-forming microorganisms without disturbing the normal...
<title>Abstract</title> Saline lakes are hypersensitive to changes in their water balance and therefore show amplified responses climatic land-use catchment. However, despite the resulting, often dramatic ecological consequences, saline rank low on policy agendas as they assumed support few ecosystem services levels of biodiversity. Here, we challenge this view evaluate threatened species 84 distributed across globe. We found that harbour not only aquatic biota but also a diverse range...
Fishponds are regarded as hypertrophic systems accompanied by low biodiversity. We focused on the phytoplankton diversity of 15 fishponds located in Austria. Of fishponds, 12 waterbodies aquaculture ponds stocked with common carp, which converted to organic farming some years ago grain supplementary feed, and 3 used for recreational fishing. The trophic state index increased from 59 71 spring 80 93 autumn classified mid-eutrophic hypertrophic. taxa number was surprisingly high (taxa richness...