A5062046803- Ecology, Conservation, and Geographical Studies
- Mercury impact and mitigation studies
- Environmental Toxicology and Ecotoxicology
- Heavy metals in environment
- Fish Ecology and Management Studies
- Aquaculture Nutrition and Growth
- Environmental Science and Technology
- Toxic Organic Pollutants Impact
- Heavy Metal Exposure and Toxicity
- Isotope Analysis in Ecology
- Climate change and permafrost
- Aquaculture disease management and microbiota
- Fish Biology and Ecology Studies
- Ecology and biodiversity studies
- Forest Ecology and Biodiversity Studies
- Geology and Paleoclimatology Research
- Forest Management and Policy
- Sustainability and Climate Change Governance
- Peatlands and Wetlands Ecology
- Marine and coastal ecosystems
- Plant Ecology and Soil Science
- Marine animal studies overview
- Marine and fisheries research
- Chromium effects and bioremediation
- Transboundary Water Resource Management
Institute for Interdisciplinary Mountain Research
2016-2024
Austrian Academy of Sciences
2008-2024
UNESCO
2022
Vrije Universiteit Amsterdam
2021
TU Wien
2019
University of Bern
2019
Environment and Climate Change Canada
2009
Queen's University
2009
Universität Innsbruck
1989-2005
Heidelberg University
1997
Recent and historical deposition of mercury (Hg) was examined over a broad geographic area from southwestern Northwest Territories to Labrador the U.S. Northeast northern Ellesmere Island using dated sediment cores 50 lakes (18 in midlatitudes (41-50 degrees N), 14 subarctic (51-64 N) 18 Arctic (65-83 N)). Distinct increases Hg overtime were observed 76% Arctic, 86% 100% midlatitude cores. Subsurface maxima depositional fluxes (microg m(-2) y(-1)) only 28% 18% arctic lakes, indicating little...
Abstract Using a whole-watershed approach and combination of historical, contemporary, modeled paleolimnological datasets, we show that the High Arctic’s largest lake by volume (Lake Hazen) has succumbed to climate warming with only ~1 °C relative increase in summer air temperatures. This deepened soil active layer triggered large mass losses from watershed’s glaciers, resulting ~10 times delivery glacial meltwaters, sediment, organic carbon legacy contaminants Lake Hazen, >70% decrease...
Cd and Pb concentrations in the liver, kidney, stomach contents of Arctic char (Salvelinus alpinus) from an oligotrophic high mountain lake (Schwarzsee ob Solden Tyrol, Austria) with low pH (4.8 to 6.4) alkalinity (-8 +8 μequiv.·L -1 ) were investigated over course 1 year. Peak water coincided drop during snowmelt, whereas metal liver kidney lowest at end winter increased summer. Furthermore, load food was considerably higher than Thus, fluctuations levels fish did not correlate seasonal...
Rubidium (Rb), a rarely studied alkali metal, may be an essential ultra-trace element for humans and other organisms. However, very little information exists in regard to the concentrations distribution of Rb freshwater marine food webs. We measured fish from Lake Erie two Arctic lakes (Lake Hazen Resolute Lake) seabirds, ringed seals, invertebrates Northwater Polynya Baffin Bay. The analogues Rb, cesium (Cs), potassium (K) were also analysed subset Lakes Hazen. Cs Cs:K ratios sampled biota...
Arctic char (Salvelinus alpinus L.), the top predator in High lakes, often is used as a bioindicator of Hg contamination aquatic ecosystems. The present study investigated effects trophic position, size, and age Lake Hazen, largest lake Canadian (81 degrees 50'N, 70 25'W), on bioaccumulation. In addition, several essential (Se, K) nonessential elements (Tl, Cs) muscle tissue were examined to compare their behavior that Hg. Trophic position was identified by stable isotope (delta15N)...
Temporal trends and climate related parameters affecting the fate of legacy persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs) organochlorine pesticides (OCPs) were examined in landlocked Arctic char from four lakes Canadian Arctic. Among biological parameters, lipid content was a key factor explaining concentration most POPs char. Legacy PCBs OCPs generally showed declining concentrations char, consistent with past restriction on uses emissions POPs. However,...
We studied Arctic char (Salvelinus alpinus) from five oligotrophic Alpine lakes in northern Tyrol, Austria, that differed altitude (929–2796 m above sea level), pH (pH 5.4–8.3), and alkalinity (1.3–2750 μequiv.∙L −1 ). Concentrations of Cd, Pb, Zn, Cu were measured the water kidney fish, allowing calculation metal bioconcentration factors between fish kidney. Despite relatively low Cd Pb concentrations (Cd, 0.1 μg∙L ; 0.5 , dissolved), kidneys most acidic lake 123 μg∙g 19 dry weight)...
Arctic lakes can provide a long-term perspective on environmental change, including trends in long-range atmospheric transport and deposition of contaminants, inferred from studies sediment cores. In this study, we conducted the first detailed bathymetric survey Lake Hazen (Quttinirpaaq National Park, Ellesmere Island, Nunavut), world's largest lake north 74˚ latitude. With these data were able to determine optimal locations for coring collect analyze profundal A map was developed basis 362...
The sites of absorption ascorbic acid (AA) in the rainbow trout (Oncorhynchus mykiss) gut were located stomach (20.7%), pyloric caecae region (23.4%), middle intestine (21.9%) and posterior (20.1%). Ascorbic sulfate (AS) found to be absorbed (27.7%) although it is likely that figure obtained an overestimate. This conclusion based on concentration factor intestinal contents (faeces/food ratio) being much higher for than external dietary marker, chromic oxide. apparent protein rates from three...
During the past four decades UNESCOâs Man and Biosphere (MAB) Programme its World Network of Reserves repeatedly went through significant adaptation modernization processes. The Seville Strategy Statutory Framework (UNESCO 1996), Madrid Action Plan 2008) MAB 2015â2025 2016a), followed by Lima 2016â2025 2016b) were important steps in modernizing biosphere reserve concept. This article describes how Austrian National Committee has responded to this ongoing revision UNESCO standards...
Non-anadromous forms of Arctic char (Salvelinus alpinus), those that are restricted to lakes and rivers, typically have higher mercury (Hg) concentrations than anadromous forms, which migrate from the sea. Using tissue burden data literature our own analyses, we performed a screening-level risk assessment methylmercury (MeHg) for non-anadromous char. Our included 1569 fish distributed across 83 sites. Site-specific mean total Hg in muscle varied considerably 0.01 1.13 µg/g wet weight, with...
Abstract Dried blood spots (DBS), created by applying and drying a whole sample onto filter paper, provide simple minimally invasive procedure for collecting, transporting, storing blood. Because DBS are ideal use in field resource‐limited settings, we aimed to develop accurate DBS‐based approach assessing mercury (Hg) exposure dietary carbon sources landlocked Arctic char, sentinel fish species the Arctic. We collected liquid (from caudal vein), muscle, liver, brains of char ( n = 36) from...