Search for dissertations about: "Transport proxies"

Showing result 1 - 5 of 8 swedish dissertations containing the words Transport proxies.

  1. 1. Transport by Benthic Macrofauna: Functional Classification and Biogeochemical Response

    Author : Stina Lindqvist; Göteborgs universitet.; Gothenburg University.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Marine sediments; Early diagenesis; Bioturbation; Functional groups; Benthic fluxes; Imaging; Ecosystem function; Sediment reworking; Transport proxies; Fluorescent particles;

    Abstract : Burrowing and reworking activities by benthic macrofauna regulate rates and pathways during organic matter mineralisation in bioturbated sediments. In so doing, they also affect the overall cycling of elements crucial in the biosphere (e.g. C, N, P, Fe, Mn and S). READ MORE

  2. 2. Diatom and Sedimentological Investigations on West Antarctic Shelf Sediment

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Charlotte Sjunneskog; Bjorg Stabell; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Antarctica; climate change; diatom abundance; geochemistry; Geovetenskap; NATURAL SCIENCES Earth sciences; NATURVETENSKAP Geovetenskap; Quarternary Geology; kvartärgeologi;

    Abstract : Climate and environmental change following the retreat of the last glacial ice sheet in the Antarctic Peninsula has been interpreted, employing diatom abundance, relative abundance of Chaetoceros resting spores and diatom assemblages as proxies. These together with sedimentological data and radiocarbon dating, suggest four major events that can be further subdivided. READ MORE

  3. 3. Manganese cycling in the Baltic Sea over the last ~8000 years: the influence of redox conditions on mineral formation and burial

    University dissertation from Department of Geology, Lund University

    Author : Conny Lenz; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; sediments; hypoxia; redox conditions; manganese;

    Abstract : The Baltic Sea is one of the largest brackish water bodies in the world and is suffering extensive environmental issues caused by eutrophication and warming climate. A halocline in the water column divides more saline bottom water fed by inflows through the narrow connection with the North Sea from the surface waters and inhibiting exchange of oxygen between the two water masses. READ MORE

  4. 4. Holocene development of Lake Lögurinn and Eyjabakkajökull : a multi-proxy approach

    University dissertation from Department of Earth and Ecosystem Sciences, Lund University

    Author : Johan Striberger; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Iceland; the Holocene; lake sediments; varves; glacial meltwater variability; surge periodicity; palaeoclimate;

    Abstract : The North Atlantic region has experienced significant climate fluctuations during the Holocene. It has been shown that these fluctuations affected the terrestrial environment in Iceland, including its glaciers and ice caps. READ MORE

  5. 5. Intestinal Gene Expression Profiling and Fatty Acid Responses to a High-fat Diet

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Jonathan Cedernaes; Helgi B Schiöth; Robert Fredriksson; Anders Jacobsson; [2013]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Adhesion GPCR; delta-5 desaturase; delta-6 desaturase; desaturase index; Diet-induced obesity; estimated desaturase activity; fatty acid composition; gas chromatography; gastrointestinal tract; G-protein coupled receptor; high-fat diet; intestine; linoleic acid; liver; mRNA expression; palmitoleic acid; plasma; phospholipids; proximodistal; RT-qPCR; solute carrier; SCD-1; SCD-16; SCD-18; stearoyl-CoA desaturase; subcutaneous adipose tissue; subsection; triacylglycerols.; Medical Genetics; Medicinsk genetik; Nutrition; Nutrition; Näringslära; Nutrition;

    Abstract : The gastrointestinal tract (GIT) regulates nutrient uptake, secretes hormones and has a crucial gut flora and enteric nervous system. Of relevance for these functions are the G protein-coupled receptors (GPCRs) and the solute carriers (SLCs). READ MORE