Essays about: "Trophic transfer"

Showing result 1 - 5 of 9 essays containing the words Trophic transfer.

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

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Sara Westerström; [2023]
    Keywords : 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;

    Abstract : 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. READ MORE

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

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

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

    Abstract : 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. READ MORE

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

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Maya Ahlgren; [2021]
    Keywords : algal toxins; Mytilus trossilus edulis;

    Abstract : 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. READ MORE

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

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Johanna Orsholm; [2021]
    Keywords : Byproduct; Cross-feeding; Digital evolution; Gut microbiome;

    Abstract : 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. READ MORE

  6. 5. The effect of riparian buffer properties on spider communities and aquatic-terrestrial food-web lingages : using polyunsaturated fatty acids as biomarkers

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

    Author : Ellinor Ramberg; [2019]
    Keywords : riparian buffer; polyunsaturated fatty acids; spiders; trophic connectivity; subsidies; agricultural landscape;

    Abstract : Riparian habitats are key habitat interfaces that regulate flows of resource subsidies between aquatic and terrestrial food webs, whilst supporting high biodiversity andproviding ecosystem services. However, frequently these habitats are highly degraded, especially in agricultural landscapes. READ MORE