Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 67 for “"Baltic Sea"”.
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Distribution and ecology of charophytes in the Baltic Sea.
… the study was to describe the distribution and seasonal growth pattern of charophytes in the Baltic Sea area and determine the importance of the key environmental factors and invertebrate grazing on the development of charophyte communities. This thesis is focused on two species – the …
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The Carbon Dioxide System in the Baltic Sea Surface Waters
… to be investigated. One piece is how the coastal seas, which are used by people and influenced by industrialization, are functioning. In this thesis, the CO2 system in the Baltic Sea surface water has been investigated using observations from the last century to the present. The Baltic Sea is …
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THE GRAY ZONE SURGE: RUSSIA’S MARITIME SUBVERSION IN THE BALTIC SEA
… zone tactics in the maritime domain within the Baltic Sea Region (BSR). States utilize gray zone tactics when they act through kinetic and non-kinetic means that allow them to stay below the threshold of conventional war. To support economic interests to fund its war in Ukraine, Russia has …
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Characterizing and reconstructing 500 years of climate in the Baltic sea Basin
… This thesis analyses the past climate of the Baltic Sea Basin and relates ice coverage and river runoff to changes in atmospheric circulation. The regional climate of the Baltic Sea Basin has been analysed using relevant climatic time series for the past 100–500 years. The time series used in …
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On optical and physical properties of sea ice in the Baltic Sea
Sea ice has been recognized as one of the key elements of polar and sub-polar seas, including Baltic Sea. The existence of sea ice cover and its properties have influence to many aspects of marine biology, climate and seafaring. This thesis is concentrated on describing physical and optical …
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Characterization of Natural and Anthropogenic Seabed Features in the Southwestern Baltic Sea
… from human activities that can disturb the seabed and may threaten the proper functioning of marine ecosystems. A sustainable balance between human uses and seabed integrity requires knowledge of the seabed's physical characteristics, benthic habitat distribution, and the extent of human …
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Methane processes in the coastal sediments and water column of the Baltic Sea
… This study explores methane dynamics in the Baltic Sea from the open sea, to estuaries and specific microbial processes. Major inflow cycles control methane dynamics in the open Baltic by bringing oxygen to the deep basins, where methane typically accumulates in large amounts during …
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Evolution of the brown algae Fucus radicans and F. vesiculosus in the Baltic Sea
… macroalga (Fucus vesiculosus) that entered the Baltic Sea about 6000 years ago, and later gave rise to a new endemic species, F. radicans. To examine whether the two species have adapted to local conditions of the Baltic Sea, or have been able to establish due to largely plastic phenotypes, we …
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Modelling the Baltic Sea food web with a Dynamic Bayesian Network with hidden variables
… Network (DBN) model to one such ecosystem, the Baltic Sea. Three versions of a DBN of the Gotland Basin food web are fitted to data, to evaluate the role of different setup of hidden variables. The hidden variables were able to find similar patterns and links to observed variables in the time …
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The Weichselian in southern Sweden and southwestern Baltic Sea : glacial stratigraphy, palaeoenvironments and deglaciation chronology
… of southernmost Sweden and the southwestern Baltic Basin is discussed, with special emphasis on Middle and Late Weichselian ice advances and subsequent deglaciations. The main study area was Kriegers Flak in the southwestern Baltic Sea where pre-Late Weichselian sediments were identified. We …
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Political Cooperation and International Environmental Governance in the Baltic Sea Region after World War II
… environmental and political cooperation in the Baltic Sea Region after World War II. The Baltic Sea is surrounded by nine states and the degradation of the marine environment of the Baltic Sea has become a common problem. However, international environmental cooperation depends on many political …
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Phytoplankton dynamics in lakes and the Baltic Sea: a combination of satellite and in situ data
Fütoplankton on veekogude toiduvõrgustike alus ning mängib võtmerolli toitainete ja maailma kliima reguleerimisel. Kuid kui tingimused on sobivad, võivad mõned liigid, eriti tsüanobakterid, moodustada kahjulikke õitsenguid, mis ohustavad ökosüsteeme ja inimeste tervist. Antud töö uurib, kuidas neid …
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“Influence of climate change on behavioural traits of Palaemon elegans, an invasive species in the Baltic Sea
The Baltic Sea is undergoing changes due to climate change, including an increase in its temperature. This may in turn lead to changes in the traits of the species that inhabit it, including non-endemic, invasive species. Palaemon elegans is a species native to the Atlantic Ocean that has been …
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Assessment of dietary patterns and prey consumption of marine mammals: Grey seals (Halichoerus grypus) in the Baltic Sea
The Baltic Sea has been severely affected by pollution and resource overexploitation during the last centuries. The grey seal (Halichoerus grypus) is a good example of how a species can be affected by such changes. In the early 1900s grey seals were common, but hunting and environmental …
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EU Sub-national authorities as international actors: Two Nordic cases in the context of the Baltic Sea Region
… and the Oresund Region within the context of the Baltic Sea Region. Theoretically, it identifies the challenges from above and below to the authority of the state, and examines rational and reflectivist conceptions of sovereignty, authority and territoriality in order to characterise and delimit …
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Complex seismo-acoustic and lithological study of the Lateglacial and postglacial sediments northern Gulf of Riga, eastern branch of the central Baltic Sea
Viimasel ajal on märgatavalt aktiviseerinud inimtegevus rannalähedases meres (maavarade otsing, tuuleenergia parkide rajamine jmt), mis on suurendanud vajadust merepõhja igakülgsete geoloogiliste uuringute järele. Eestit ümbritsevast Läänemerest on siiani vähe uuritud selle keskosast Eesti ja Läti …
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Carbon Dynamics in Northern Marginal Seas
The marginal seas have, despite their relatively small area, an important role in the global carboncycle. They are largely influenced by carbon and nutrient fluxes from land and a large part of the biological production occurs in the marginal seas. The carbon dynamic in two shelf areas – The Baltic …
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