Sökning: "Macroinvertebrates"

Visar resultat 1 - 5 av 13 uppsatser innehållade ordet Macroinvertebrates.

  1. 1. Seasonal community dynamics of macroinvertebrates in an Arctic stream

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Ellinor Jakobsson; [2019]
    Nyckelord :Macroinvertebrates; Arctic; seasonality; community composition; Abisko;

    Sammanfattning : Arctic ecosystems are amongst the most vulnerable on Earth to ongoing climate change. While the responses to these changes are well studied on land, less is known about how aquatic communities may respond to a warmer arctic. LÄS MER

  2. 2. Effects of a fish farm on downstream macroinvertebrates

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Joakim Thoresson; [2018]
    Nyckelord :;

    Sammanfattning : The number of fish farms is increasing worldwide tomeet the global demand for fish used as a food source for humans. The WorldBank predicts that by 2030, 62 percent of all consumed fish globally will beproduced in fish farms. Due to this increasing demand for fish, fish farming isa growing business and the numbers of fish farms are increasing. LÄS MER

  3. 3. Hasslebäcken En studie av vattenkvalitet,vandringshinder och potentiellareproduktionsbiotoper för öring

    Kandidat-uppsats, Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap; Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Författare :Julius Jarving Ohlsson; Linus Welander; [2016]
    Nyckelord :Trout; fish barrier; benthic macroinvertebrates; stream; eutrophication.;

    Sammanfattning : This paper is about analyzing water quality of a stream that flows in southwest of Swedencalled Hasslebäcken. The stream is a tributary of Suseån and has its springs in the naturereserve Biskopstorp and flows through a mixed landscape of mostly spruce forests andagriculture land. LÄS MER

  4. 4. Evertebraters kolonisation på fin ved i semi-naturliga bäckar

    Kandidat-uppsats, Karlstads universitet/Institutionen för miljö- och livsvetenskaper

    Författare :Patricia Johansson; [2015]
    Nyckelord :Macroinvertebrate density; functional feeding groups; habitation; substrate; artificial watercourse; diversity; drift; water velocity; upstream; downstream; Finland; Salix sp.; Makroevertebrattäthet; funktionella födogrupper; habitat; substrat; artificiella kanaler; diversitet; drift; vattenhastighet; uppström; nedström; Finland; Salix sp;

    Sammanfattning : Wood can be added to streams to create microhabitats that provide macroinvertebrates with an opportunity for re-colonization by making the stream more heterogeneous. I examined colonization on wood substrate by macroinvertebrates in semi-natural streams in northern Finland during a three month period. LÄS MER

  5. 5. Decomposition of leaf litter in headwater streams. : Effects of changes in the environment and contribution of microbial and shredder activity on litter decomposition.

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Johan Lidman; [2015]
    Nyckelord :Leaf-litter decomposition; headwaters; microbial decomposition; shredders; ecosystem adaptation;

    Sammanfattning : Headwaters, which are the most common stream order in the landscape, are mostly dependent on energy produced in the terrestrial system, largely consisting of leaf litter from riparian vegetation. The aim of this study was to investigate the decomposition in headwaters of leaf litter from three native (alder, birch, spruce) and one non-native (lodgepole pine) species and how decomposition responds to changes in the environment. LÄS MER