Essays about: "humus"

Showing result 1 - 5 of 71 essays containing the word humus.

  1. 1. Coupling between iron and humic substances in a land-sea transitional zone in the northern Baltic Sea

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Anna Osterman; [2023]
    Keywords : Iron; Humic substances; Dissolved organic carbon; Baltic Sea; Rivers;

    Abstract : In marine ecosystems around the world, iron (Fe) is a well-studied and important trace element which has been found to stimulate phytoplankton and cyanobacteria growth, as well as limit nitrogen fixation and being essential for Legionella pneumophila which is known as the main cause of Legionnaires’ disease. Fe also contributes to the brownification of freshwater and has recently been documented to increase in concentration in rivers in Sweden. READ MORE

  3. 2. Jämförelse av planteringsresultatet mellan markberedningsmetoderna harvspår och omvänd torva för planteringsmaskinen Plantma X

    University essay from SLU/Department of Forest Biomaterials and Technology (from 131204)

    Author : Simon Dahlberg; [2023]
    Keywords : Maskinell plantering; terrängegenskap; planteringskvalitet; högläggning; blockkvot; stubbtäthet; humustjocklek;

    Abstract : Holmen har som första skogsbolag i Sverige köpt in planteringsmaskinen Plantma X med syfte att i framtiden ersätta delar av den manuella planteringen med maskinell plantering. Bra planteringskvalité samt en markberedningsmetod anpassad till traktens terrängegenskaper är viktiga faktorer för att planteringsmaskinen ska kunna implementeras i större skala framöver. READ MORE

  4. 3. Exploring the factors affecting tree establishment after wildfire in a boreal forest in Sweden

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Robert Pim; [2023]
    Keywords : tree regeneration; tree establishment; wildfire; boreal forests; disturbance; sapling regeneration; generalized linear mixed models;

    Abstract : The factors affecting tree establishment in boreal forests after fire will help determine the community composition of the regenerating forest. These may have large consequences on the community dynamics for years after the fire disturbance. READ MORE

  5. 4. Aluminum levels in the O-horizon of soils near Sundsvall, Sweden : Are levels of Al elevated due to smelter emission?

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Mattias Sundin; [2023]
    Keywords : Aluminium; Smelter emissions; O-horizon; Al concentration; Scots’ pine needles;

    Abstract : Aluminum (Al) is a potentially toxic element for humans, animals, and plants. Al emitted from smelter plants is one source of Al that may be responsible for increased exposure to humans and the environment. READ MORE

  6. 5. Differences and similarities in stand characteristics after prescribed burning and wildfire : implications for conservation of forest biodiversity

    University essay from SLU/Dept. of Ecology

    Author : Hannah Sophie Jakob; [2023]
    Keywords : coarse woody debris; conservation; biodiversity; boreal forest; Daldinia loculata; Fennoscandia; prescribed burning; regeneration; wildfire; woodpecker;

    Abstract : 1. Wildfires are a natural disturbance in the boreal forests of Fennoscandia and have shaped and formed forests in the past, resulting in very heterogeneous forests containing large amounts of dead and living trees in various age classes. READ MORE