Search for dissertations about: "Long-term field experiment"

Showing result 1 - 5 of 64 swedish dissertations containing the words Long-term field experiment.

2. 1. Microbial Communities in Boreal Peatlands : Responses to Climate Change and Atmospheric Nitrogen and Sulfur Depositions

   Author : Magalí Martí Genero; Bo Svensson; Åsa Danielsson; Torben Christensen; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Microbial communities; methanogens; plant communities; peatland; temperature; nitrogen; long-term; field experiment; high-throughput sequencing; Microbiella samhällen; metanogener; växtsamhällen; myrar; torv; temperatur; kväve; långtid; fältexperiment; high-throughput-sekvensering;

   Abstract : Myrmarker har en stor roll i regleringen av den globala kolbalansen och koncentrationerna av koldioxid och metan i atmosfären, vilket gör dem till speciellt viktiga ekosystem ur ett klimatförandringsperspektiv. Förändringar av myrmarker genom naturlig utveckling eller antropogen påverkan kan därför få långtgående störningar av myrars klimatreglerande funktion. READ MORE

4. 2. Semi-natural meadows in southern Sweden - changes over time and the relationship between nitrogen supply and management

   Author : Gudrun A I Berlin; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant community dynamic; Nitrogen; Mowing; Meadows; Management; Long-term study; Landscape changes; Field experiment; Community diversity; Fertilisation; Species changes; Species turnover; Plant ecology; Växtekologi;

   Abstract : In this thesis, I have studied continuously managed semi-natural meadows in south-central Sweden. The purpose was 1) to make a survey of meadow vegetation in the region 2) to compare two investigations of the vegetation, one from 1963-1966 and one from 1990 3) to investigate experimentally in the field how increased nitrogen supply rate as well as changed management intensity effects the nitrogen economy and species richness in two meadow communities. READ MORE

5. 3. Carpe Diem or Seize your Health? The Economics of Time Preferences, Health, and Education : Carpe Diem eller fånga din hälsa? Nationalekonomisk forskning om tidspreferenser, hälsa och utbildning

   Author : Lisa Norrgren; Göteborgs universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; time preference; early mortality; long term health; illness; behaviour; lifestyle; medication adherence; field experiment; educational investments; inter-generational preferences; education; cognitive ability; educational plans;

   Abstract : Who is more likely to follow medical recommendations, invest in their health and pursue higher degrees of schooling? Behavioral economic theory provides a clear answer to this question: more patient individuals (who discount future outcomes less heavily) should be more likely to choose costs and forgo utility now, in order to get better long-run outcomes. But does this behavioral theory match up with peoples' real choices? If so, can it be used to predict important future life events? In four different chapters, this thesis shed new light on education, illness, and death outcomes. READ MORE

6. 4. Tillage practices and their impact on soil organic carbon and the microbial community

   Author : Sofia Hydbom; Biodiversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Tillage; Agriculture; Long-term field experiment; Microorganism; Clayey soil; Soil organic carbon; Farmer; Sweden;

   Abstract : Soil microorganisms are important for climate regulation as well as for plant nutrition. In agricultural soils the microorganisms are affected by management choices, like which type of tillage that is used. READ MORE

7. 5. Process Models for CO2 Migration and Leakage : Gas Transport, Pore-Scale Displacement and Effects of Impurities

   Author : Farzad Basirat; Auli Niemi; Karsten Jensen; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Geological Carbon Storage; CO2 leakage; Field experiment; Laboratory experiment design; Multi-phase flow; Heterogeneity; Wettability; Pore-scale modeling; Impurity gases; Hydrology; Hydrologi;

   Abstract : Geological Carbon Storage (GCS) is considered as one of the key techniques to reduce the rate of atmospheric emissions of CO2 and thereby to contribute to controlling the global warming. A successful application of a GCS project requires the capability of the formation to trap CO2 for a long term. READ MORE