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How phytoplankton pigments reflect historical and contempoarary status of large shallow lakes?
(Eesti Maaülikool, 2012)
Phytoplankton is the most important primary producer in the aquatic ecosystems and account for half of all photosynthetic activity on earth, thus creating the base for most aquatic food chains. It also plays key role in ...
The diet of juvenile pikeperch Sander lucioperca in lakes Peipsi and Võrtsjärv: relations between long-term changes in the fish communities and food resources in large shallow lakes
(Eesti Maaülikool, 2012)
Pikeperch, Sander lucioperca (L.), is a pelagic predator, which plays a key role in many inland water bodies of the temperate zone by structuring populations at lower trophic levels (Frankiewicz et al., 1997; Dörner et ...
Dissolved organic matter and its ecological role in large and shallow water bodies
(Eesti Maaülikool, 2013)
About 90% of the organic matter in most aquatic systems is dissolved organic matter (DOM) and the rest
forms the pool of particulate organic matter. DOM plays a significant role in the carbon and energy cycle of
water ...
Effects of natural and anthropogenic pressures and disturbances on the macrophytes of Lake Peipsi
(Eesti Maaülikool, 2017)
Macrophytes play an important role in aquatic ecosystems. Their temporal and spatial distribution is governed by various natural and anthropogenic pressures and disturbances. The aim of the thesis is to study the effect ...
Dynamics and Interactions of Phyto- and Zooplankton as Indicators of the Status of Lake Peipsi
(Eesti Maaülikool, 2012)
Phyto- and zooplankton, the targets of the study, are the most important links of a water body’s food web. The stability of water body’s ecosystem is largely influenced by the interactions of phyto- and zooplankton. These ...
Effects of natural and anthropogenic pressures on variations in the water quality of large lakes
(Eesti Maaülikool, 2014)
An understanding of the factors that drive the water quality of large lakes is critical to the protection of such waterbodies. In the present study, the contributions made by riverine nutrient loading, sediment resuspension ...
The effect of natural variability on the assessment of ecological status of shallow lakes
(Eesti Maaülikool, 2018)
The dissertation contributes to the improvement of large lake monitoring, demonstrating that besides following the class boundaries of ecological status established by law, reliable status estimates of such lakes require ...
Analysis of molecular genetic and life-history traits in Eurasian perch (Perca fluviatilis L.)
(Eesti Maaülikool, 2016)
Fishes provide food and livelihood for hundreds of millions of people around the world and currently fish consumption is higher than ever before. As a consequence, the threats of over-exploitation, illegal fishing and fish ...
Impact of climate change and other ecological factors on selected fish populations and fishery in Estonian large lakes
(Eesti Maaülikool, 2021)
Human activities and climate change have become the most consequential threats to freshwater ecosystems and their inhabitants, especially fish. The response of the fish population to their environment is not always ...
From microscopy to genes – tracing toxic cyanobacteria in a shallow eutrophic lake
(Estonian University of Life Sciences, 2022)
Global warming paired with eutrophication processes is shifting phytoplankton communities towards the dominance of bloom-forming and potentially toxic cyanobacteria. Cyanobacterial blooms are considered an increasing threat ...