Essays about: "diatom index"

Found 3 essays containing the words diatom index.

  1. 1. Malformation in different species of benthic diatoms in three herbicide polluted streams in southern Sweden

    University essay from Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Author : Helena Spångfors; [2017]
    Keywords : diatoms; primary producers; unicellular algae; diatom index; malformation; deformation; herbicides; pesticides; kiselalger; primärproducenter; encelliga alger; kiselalgsindex; missbildning; missbildade; växtskyddsmedel; bekämpningsmedel; primärproducenter; encelliga alger; Höje å; M42; Skivarpsån;

    Abstract : Målet med den här studien var att undersöka kiselalger och dess eventuella missbildningar i tre vattendrag i södra Sverige - Höje å, Skivarpsån och M42. Kiselalger används som bioindikator för vattenkvalitet i hela Europa, men de befintliga kiselalgsindexen visar inte eventuell förekomst av miljöfarliga ämnen. READ MORE

  3. 2. The impact of phosphorus and temperature on the toxicity of zinc on benthic diatom

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

    Author : Josabeth Ström; [2016]
    Keywords : benthic diatom; zinc; temperature; phosphorus; toxicity; ecological status;

    Abstract : The current index, IPS, developed for benthic diatoms and used for assigning the ecological status of streams in Sweden reflects on levels of nutrients and organic pollution. Metals are not considered in the index, which leads to the risk that metal contaminated streams can be assigned a high ecological status based on this index. READ MORE

  4. 3. Freshwater pearl mussel as indicators of Swedish streams - a comparison between freshwater pearl mussel and biological quality elements

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

    Author : Kristin Forsell; [2014]
    Keywords : flodpärlmussla; biologiska kvalitetsfaktorer; freshwater pearl mussel; biological quality elements;

    Abstract : The freshwater pearl mussel (Margaritifera margaritifera) is a large freshwater mussel. Because of its sensitivity to human impact, such as eutrophication, acidification and alterations of hydromorphology, the species is considered as a robust indicator of stream water quality and biodiversity. READ MORE