Sökning: "trophic transfer"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden trophic transfer.

  1. 1. TROFISK ÖVERFÖRING OCH TOXISKA EFFEKTER AV (NANO-)PARTIKLAR FRÅN ELEKTRONISKT AVFALL

    Kandidat-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap; Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Elvira Hagman; [2023-06-22]
    Nyckelord :;

    Sammanfattning : Today, nanoparticles (NPs) are being included in an increasing number of products, and with that comes the dispersion of NPs in the environment. However, the ecological impact of NPs remains largely unexplored, particularly in regards to real emissions with complex compositions of NPs and other pollutants. LÄS MER

  3. 2. Change in uptake and transfer of zinc in the food chain when predatory fish disappear from the system

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Sara Westerström; [2023]
    Nyckelord :Aquatic food web; Food chain structure; Trophic transfer; Decline of top predators; Stage-structured biomass model; Pollutants; Heavy metals; Zinc; Akvatisk födoväv; Födovävsstruktur; Trofisk överföring; Minskning av toppredatorer; Stegstrukturerad biomassamodell; Föroreningar; Tungmetaller; Zink;

    Sammanfattning : There is a widespread distribution of possibly toxic heavy metals, such as zinc, in aquatic ecosystems. Simultaneously aquatic food webs are changing due to declining predatory fish stocks. LÄS MER

  4. 3. Microplastics in food webs- occurrence in Lake Vänern brown trout (Salmo trutta) and its main prey

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Hanna Nordström; [2023]
    Nyckelord :microplastic; freshwater; fish; brown trout; mikroplast; sötvatten; fisk; öring;

    Sammanfattning : Over the past decade, research on microplastic pollution has gained significant attention. Research regarding microplastic occurrence in freshwater fish, however is still scarce. While possible pathways have been investigated, passive transfer via ingestion of prey, and possible bioaccumulation in different organs remains relatively unstudied. LÄS MER

  5. 4. Algal toxins in the Baltic blue mussel (Baltic Mytilus trossulus edulis) : spatiotemporal variations in the Baltic Sea

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Maya Ahlgren; [2021]
    Nyckelord :algal toxins; Mytilus trossilus edulis;

    Sammanfattning : Algal toxins have been found to bioaccumulate and have a seasonal variation over the summer months in marine biota. This can impact the food web through trophic transfer and the potential of using blue mussels for aquaculture. LÄS MER

  7. 5. Recurring perturbations limit the length of byproduct cross-feeding chains in digital communities

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Johanna Orsholm; [2021]
    Nyckelord :Byproduct; Cross-feeding; Digital evolution; Gut microbiome;

    Sammanfattning : The human gut microbiome is important for health and development, and understanding its functioning and dynamics are of great medical importance. The microbiome food web is largely characterized by chains of byproduct cross-feeding (where metabolites of one organism are used as nutrients for another), yet a recent study have shown that the average length of the chains are considerably shorter than what metabolic capabilities of present species allow for. LÄS MER