Essays about: "diatoms"

Showing result 16 - 20 of 22 essays containing the word diatoms.

  1. 16. Environmental impacts of early metallurgy in Moshyttan : A study of one of Europe's oldest blast furnaces, using three lakes records in Nora bergslag

    University essay from Institutionen för ekologi, miljö och geovetenskap

    Author : Erik Myrstener; [2013]
    Keywords : Diatoms; Biogenic silica; Geochemistry; Pre-industrial metallurgy; Environmental effects;

    Abstract : The aim of this study was to assess the environmental effects of Moshyttan, one of the earliest known blast furnaces in Europe (ca. 11th century). The study was based on the analysis of three lake records in the immediate surroundings of the smelter. Fickeln lies directly downstream and is the main recipient of waterborne pollution. READ MORE

  3. 17. Förbättring av den svenska kiselalgsmetoden-hantering av sedimentering

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Alexandra Vásquez Guerrero; [2012]
    Keywords : kiselalger; provtagningsmetod; sedimentering; vattendrag; vattenkvalitet;

    Abstract : Benthic diatoms are used in Sweden for monitoring water quality in run-ning water; the method is also frequently used in other countries in Europe. One of the problems of the diatom method is the need for sedimentation of the fresh sample, to be able to decant the over standing water and add alco-hol as a preservations solution. READ MORE

  4. 18. Experimental zinc stress on benthic diatoms assemblage growth in Fyrisån water

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Navid Naghavian; [2012]
    Keywords : Benthic diatoms; heavy metal contamination; valve malformation; heavy metals; DOC; TOC; water assessment;

    Abstract : Benthic diatoms are unicellular, brown algae with siliceous cell walls. They are often used to show water quality in river sand lakes. Benthic diatoms can show elevated nutrient levels, very acid conditions, pollution by organic matter and probably also pollution by heavy metals, which makes them useful biological indicator species. READ MORE

  5. 19. Paleolimnology : A literature review

    University essay from Institutionen för ekologi, miljö och geovetenskap

    Author : William Lidberg; [2012]
    Keywords : Diatoms; Lake Sediment; Eutrophication; Acidification; Climate change;

    Abstract : The aim of this literature study is to compare and discuss different fields of paleolimnology, with a focus on three main research areas – eutrophication, acidification, and climate change. Pioneering work and the development of paleolimnological methods around these three areas were reviewed and synthesized. READ MORE

  6. 20. Visar feta kiselalger på näringsrika vatten? : en undersökning om hur fosforhalt påverkar kroppsstorleken hos artkomplexet Fragilaria capucina

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Jenny Bäck; [2010]
    Keywords : kiselalger; Fragilaria capucina; miljöövervakning; storlek; bredd; längd; volym; totalfosfor;

    Abstract : Syftet med denna uppsats är att undersöka om det finns någon mätbar korrelation mellan kiselalgskomplexet Fragilaria capucinas storlek och halten av fosfor i det vattendrag där de lever. Om ett samband finns kan detta efter ytterligare studier komma att bli användbart inom miljöövervakningen då bland annat vattendragens eutrofieringsgrad ska undersökas. READ MORE