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Article
Open AccessDynamic adaptation of phytoplankton vertical migration to changing grazing and nutrient conditions
Despite the ubiquitous occurrence of vertical migration of phytoplankton its quantitative significance remains poorly known. We eliminated a dense Daphnia population in a pond by introducing whitefish fingerlings...
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Article
Open AccessGlobal data set of long-term summertime vertical temperature profiles in 153 lakes
Climate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater temperatures, and vertical thermal gradients, in many lakes ar...
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Article
Open AccessInvasive submerged macrophytes complicate management of a shallow boreal lake: a 42-year history of monitoring and restoration attempts in Littoistenjärvi, SW Finland
The small, shallow lake Littoistenjärvi (SW Finland) experienced in 1978–2019 rapid fluctuations between extreme ecological states, initially associated with mass occurrences of the submerged macrophyte Elodea ca...
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Article
Open AccessDevelopment of Lake Vesijärvi through four decades of remediation efforts
The diversion of sewage inputs in the mid-1970s led to an order of magnitude reduction in nutrient loading to Lake Vesijärvi, southern Finland. After the diversion, nutrient concentrations declined, consistent...
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Article
Limnothrissa miodon (Boulenger, 1906) in Lake Kariba: daily ration and population food consumption estimates, and potential application to predict the fish stock biomass from prey abundance
The offshore pelagic niche in Lake Kariba is mainly occupied by the Tanganyika sardine, Limnothrissa miodon, commonly called ‘kapenta’, which is a mainly zooplanktivorous clupeid fish. The population dynamics of ...
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Article
Open AccessEcosystem change in the large and shallow Lake Säkylän Pyhäjärvi, Finland, during the past ~400 years: implications for management
Lake Säkylän Pyhäjärvi has been an important fishing site and drinking water source for the local population for centuries. The lake has undergone significant changes: (1) the water level was lowered in the 16...
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Article
Impacts of climate warming on the long-term dynamics of key fish species in 24 European lakes
Fish play a key role in the trophic dynamics of lakes. With climate warming, complex changes in fish assemblage structure may be expected owing to direct effects of temperature and indirect effects operating t...
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Article
Limnocnida tanganyicae medusae (Cnidaria: Hydrozoa): a semiautonomous microcosm in the food web of Lake Tanganyika
Medusae are important members of marine food webs, but are rare in lakes. In one of the largest lakes in the world, Lake Tanganyika, a small medusa (Limnocnida tanganyicae) is a prominent component of zooplankton...
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Chapter
Limnocnida tanganyicae medusae (Cnidaria: Hydrozoa): a semiautonomous microcosm in the food web of Lake Tanganyika
Medusae are important members of marine food webs, but are rare in lakes. In one of the largest lakes in the world, Lake Tanganyika, a small medusa (Limnocnida tanganyicae) is a prominent component of zooplankton...
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Article
Climate-related challenges in long-term management of Säkylän Pyhäjärvi (SW Finland)
Säkylän Pyhäjärvi (SW Finland) is an example of a large and shallow lake suffering from eutrophication. During the last 20 years, the quality and general usability of water in Pyhäjärvi have shown considerable...
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Article
What factors control planktonic ciliates during summer in a highly eutrophic lake?
A mesocosm experiment in 24 enclosures (6 m3) started at the end of June 1996 in a highly eutrophic shallow lake, Lake Köyliönjärvi (SW Finland). The original factorial design with nutrient, fish and macrophyte t...
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Article
The stoichiometry of particulate nutrients in Lake Tanganyika – implications for nutrient limitation of phytoplankton
We studied the potential nutrient limitation of phytoplankton by means of seston nutrient stoichiometry and nutrient enrichment bioassays in the epilimnion of Lake Tanganyika. In most cases, the particulate ca...
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Article
Trophic structure of Lake Tanganyika: carbon flows in the pelagic food web
The sources of carbon for the pelagic fish production in Lake Tanganyika, East Africa, were evaluated in a comprehensive multi-year study. Phytoplankton production was assessed from seasonal in situ 14C and simul...
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Chapter
Trophic structure of Lake Tanganyika: carbon flows in the pelagic food web
The sources of carbon for the pelagic fish production in Lake Tanganyika, East Africa, were evaluated in a comprehensive multi-year study. Phytoplankton production was assessed from seasonal in situ ...
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Chapter
The stoichiometry of particulate nutrients in Lake Tanganyika — implications for nutrient limitation of phytoplankton
We studied the potential nutrient limitation of phytoplankton by means of seston nutrient stoichiometry and nutrient enrichment bioassays in the epilimnion of Lake Tanganyika. In most cases, the particulate ca...
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Chapter
Closing address: perspectives on basic and applied, freshwater and marine pelagic research
When asked to make some concluding comments about this symposium, I did not hesitate long, because I have had the privilege of following more or less closely the development of the various Pelag projects durin...
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Chapter
Relations between planktivorous fish abundance, zooplankton and phytoplankton in three lakes of differing productivity
Water chemistry, phytoplankton, zooplankton and fish populations were studied over several years in three shallow, non-stratified lakes with differing nutrient loadings and fish communities in southwest Finlan...
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Article
Closing address: perspectives on basic and applied, freshwater and marine pelagic research
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Article
Relations between planktivorous fish abundance, zooplankton and phytoplankton in three lakes of differing productivity
Water chemistry, phytoplankton, zooplankton and fish populations werestudied over several years in three shallow, non-stratified lakes withdiffering nutrient loadings and fish communities in southwest Finland....
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Article
Trends in Finnish limnology during 1940–1989
The volume of limnological research in Finland has considerably expanded during recent decades, especially in the 1970s, with elevated funding and improved study facilities. Projects have become larger, the pu...
