A5025395822- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Geophysical and Geoelectrical Methods
- Research in Social Sciences
- Aquatic Invertebrate Ecology and Behavior
- Fish Ecology and Management Studies
- Geochemistry and Geologic Mapping
- Geomagnetism and Paleomagnetism Studies
- Ecology and biodiversity studies
- Maritime and Coastal Archaeology
- Geology and Paleoclimatology Research
- Aquatic Ecosystems and Biodiversity
- Water Quality and Pollution Assessment
- Ecosystem dynamics and resilience
- Civil and Structural Engineering Research
- Soil and Water Nutrient Dynamics
- Mineral Processing and Grinding
- Geophysical Methods and Applications
- Arctic and Antarctic ice dynamics
- Geotechnical and Geomechanical Engineering
- Forest Ecology and Biodiversity Studies
- Freshwater macroinvertebrate diversity and ecology
- Oil Spill Detection and Mitigation
University of Helsinki
2011-2020
Outokumpu (Finland)
1972-1975
AbstractAbstractWeather-induced episodic mixing events in lake ecosystems are often unpredictable, and their impacts therefore poorly known. The can be short-lived, including changes water temperature stratification, but long-lasting effects on the lake’s biology may also occur. In this study we used automated quality monitoring (AWQM) data from 8 boreal lakes to examine how weather-induced influenced thermal structure, hypolimnetic dissolved oxygen (DO), fluorometric chlorophyll estimates...
The effectiveness of different monitoring methods in detecting temporal changes water quality depends on the achievable sampling intervals, and how these relate to extent variation. However, frequencies are rarely adjusted actual variation area. Manual sampling, for example, is often limited by level funding not optimal timing take samples. Restrictions therefore determine their ability estimate true mean variance values a certain time period or season. Consequently, we estimated intervals...
Abstract Wastewaters discharged to Lake Vesijärvi ruined its recreational value and demanded mitigation measures. In the mid-1970s, diversion of wastewaters elsewhere reduced epilimnetic total phosphorus concentration by ~ 40% from > 100 mg P m −3 in 5 years, but this was not enough eliminate cyanobacterial blooms. 1979–1984, hypolimnetic oxygenation applied decrease internal nutrient loading, pumping warm surface water hypolimnion probably intensified gas ebullition sediment, carrying...
Summary The biomanipulation of Lake Vesijärvi in southern Finland putatively changed the lake ecosystem resulting a clear‐water state, but dynamics behind observed change remained unverified. We used general analytical approach to identify abrupt transitions long‐term monitoring data Vesijärvi. Methods included identification breakpoints chlorophyll (response variable), total phosphorus (TP; key driver) and large‐bodied cladocerans (feedback mechanism biomanipulation). In addition, we...
Weather-induced episodic mixing events in lake ecosystems are often unpredictable, and their impacts therefore poorly known. The can be short-lived, including changes water temperature stratification, but long-lasting effects on the lake’s biology may also occur. In this study we used automated quality monitoring (AWQM) data from 8 boreal lakes to examine how weather-induced influenced thermal structure, hypolimnetic dissolved oxygen (DO), fluorometric chlorophyll estimates (Chl- a ),...
The body size of aquatic invertebrates is, to a great extent, dependent on ambient temperature, but distributions are also determined by other factors like food supply and predation. effect temperature organisms is formulated in the temperature–size hypothesis, which predicts smaller with increasing temperature. In this study, subfossil remains three littoral Cladocera (Alona affnis, A. quadrangularis, Chydorus cf. sphaericus) was investigated. Exoskeletal these species can be found large...