Sökning: "födovävar"

Hittade 2 uppsatser innehållade ordet födovävar.

1. 1. 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

3. 2. Importance of fish community structure, nutrients and browning for shallow lake ecosystem dynamics : A modelling perspective

   Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

   Författare :Ylva Karlberg; [2019]
   Nyckelord :biological modelling; bowning; food webs; trophic interactions; top-down and bottom-up control; nutrients; light; shallow lake; biologisk modellering; brunifiering; födovävar; trofiska interaktioner; näring; ljus; grund sjö;

   Sammanfattning : In a changing climate, it is increasingly important to be able to model environmental effects on food webs, and to do that, one must have appropriate dynamic models. I present a shallow lake ecosystem model where producers, grazers, carnivores, piscivores, and detritivores are coupled through resource (light, nutrients and detritus) fluxes between the benthic and pelagic habitats and through carnivore life history events (ontogenetic habitat and diet shifts). LÄS MER