3. PhD Theses
Recent Submissions
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Mitigation of nitrous oxide emissions from arable soils
(Estonian University of Life Sciences, 2022)The need to reduce emissions of greenhouse gases responsible for global warming of the planet is generally acknowledged. Agriculture is the main anthropogenic source of non-CO2 emissions, which include N2O and CH4. ... -
Patterns of urban park use, spatial accessibility and preferences of urban park users in Tehran, Iran
(Estonian University of Life Sciences, 2022)Tehran, the capital of Iran, suffers from many social and environmental problems. The most important problem is poor urban planning, which led to massive sprawl. The amount of urban green or blue space, in particular parks, ... -
The impact of protected areas governance and management practices on human well-being and local socioeconomic conditions
(Estonian University of Life Sciences, 2022)Over the last 50 years the number and surface of protected areas (PAs) has explosively increased, covering now almost a fifth of earth terrestrial areas and nearly tenth of marine areas. In addition to biodiversity ... -
Stability of yield and baking quality of wheat in Baltic conditions
(Estonian University of Life Sciences, 2022)The aims of the current thesis were to describe the average yield and quality potential of spring and winter wheat in Estonia. It was hypothesized that it is possible to grow winter and spring wheat varieties with good and ... -
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 ... -
Effects of abiotic stress on foliage photosynthetic characteristics and volatile organic compound emissions in tropical agricultural species
(Estonian University of Life Sciences, 2022)Plant species emit a wide varieties of biogenic volatile organic compounds (BVOCs) when they are stressed. Plant stressors can be either biotic such as pathogens, viruses and insect infestations or abiotic such as ozone, ... -
Mosquito (Diptera: Culicidae) diversity in the urban environment and countryside of Estonia
(Estonian University of Life Sciences, 2022)Mosquitoes are globally distributed insects that are familiar to most people. Thus far, 3 591 mosquito species have been described, but only a small number of these are medically important. Mosquitoes of both genders mainly ... -
Response of root fungal communities to fertilisation, crop species and cultivar
(Estonian University of Life Sciences, 2021)As the human population increases exponentially, intensification of agriculture is inevitable. Thus, there is an ongoing need for further research towards sustainable agriculture. Soil is a habitat with great microbial ... -
Effect of organic management methods on yield and quality of carrot and on weeds
(Eesti Maaülikool, 2021)The thesis covers two organic studies. The first one aimed to estimate organic carrot yield and quality in comparison of conventional production. Comparison of vegetable production systems has often provided inconsistent ... -
Pelagic calcite precipitation in lakes: from a global to a local perspective on its drivers and implications
(Eesti Maaülikool, 2021)Inland waters are relevant components of the global carbon cycle acting as active sites for biogeochemical processes. Lakes and reservoirs store and emit carbon in large quantities, comparable in magnitude to other major ... -
Hydrometeorological and climatic control over lake phytoplankton : the importance of time scales
(Eesti Maaülikool, 2021)Phytoplankton reflects changes in the environment and plays a vital role in biogeochemical cycles and the climate system. The thesis attempts to link the phytoplankton dynamics with the timing, intensity, and duration of ... -
Pathogenic and arbuscular mycorrhizal fungi in potato fields in Estonia
(Eesti Maaülikool, 2021)Soil fungi have fundamental ecological roles as decomposers, mutualists, and pathogens of plants. Roots of agricultural plants are hosts for various microorganisms. These include many harmful, often soilborne, pathogens, ... -
The effect of cover crops on biomass and nitrogen accumulation and on crop yield
(Eesti Maaülikool, 2021)The aims of the thesis were to evaluate the biomass and N accumulation of winter cover crop species (winter rye, winter turnip rape, forage radish, berseem clover and hairy vetch), winter hardiness of hairy vetch, the ... -
Influence of cultivation technologies on Fusarium spp. occurrence and production of mycotoxins in cereals
(Eesti Maaülikool, 2021)Microbiological and toxicological purity are important one indicators of the quality of cereals. Albeit the content of fusariosis and mycotoxins in the food cereals is not permitted, the feed grain may contain 0.1% Fusarium ... -
Collaboration in Estonian rural tourism
(Eesti Maaülikool, 2021)Collaboration is important for fostering rural tourism and a way to overcome challenges. More knowledge can answer how collaboration changes, what keeps stakeholders in the collaboration, how collaboration can be beneficial, ... -
Coastal meadows : maintenance, restoration and recovery
(Eesti Maaülikool, 2021)This thesis is a synthesis of 20 years of research into the restoration and recovery of Estonian coastal meadows. The restoration of semi-natural grasslands in Estonia is a new nature conservation activity with only 20 ... -
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 ... -
Maturity parameters of grapevine (Vitis sp) yield
(Eesti Maaülikool, 2021)The biochemical composition of table and wine grapes is affected by the cultivar properties, vintage and viticultural practices. Most of the research has been done with different grapevine (Vitis vinifera) cultivars. There ... -
Examining thiacloprid, essential oils and double-stranded RNA for potential use in biosafe management of pollen beetle
(Eesti Maaülikool, 2021)Throughout Europe, one of the most severely damaging threats to oilseed rape (Brassica napus) cultivation is the pollen beetle Brassicogethes aeneus; and routine use of pyrethroid insecticides has led to resistance development ... -
Phytoplankton as ecological quality indicator of lakes
(Eesti Maaülikool, 2021)According to Water Framework Directive (WFD), phytoplankton abundance, composition and bloom metrics should be used in lake ecological quality assessment. Phytoplankton is highly sensitive to environmental changes and can ...
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