Essays about: "Food webs"
Showing result 1 - 5 of 37 essays containing the words Food webs.
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1. The effects of fishing on stability of a food web under climate warming
University essay from SLU/Dept. Of Aquatic ResourcesAbstract : Predicting the effects of fishing in a warmer environment caused by climate change requires knowledge of what trophic level is fished on, the physiological effects of temperature on fish, and how these two affect ecological interactions. Both temperature and fishing are known to affect the stability of food webs in several ways. READ MORE
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2. 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 geovetenskaperAbstract : 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
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3. Constructing a food web from inventory data in a boreal forest-dominated national park in south-eastern Sweden
University essay from Linköpings universitet/Institutionen för fysik, kemi och biologiAbstract : A food web was constructed for a boreal-forest dominated national park in south-eastern Sweden, called Tyresta national park and its surrounding nature reserve. Due to increasing threats to mammalian species and their critical role in the food web mammals were used as the outset of the food web, and from there branching out to taxa trophically interacting with mammals directly and indirectly. READ MORE
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4. 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)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
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5. Common Guillemots Uria aalge Alter Trip Patterns During Breeding
University essay from SLU/Dept. of Animal Environment and HealthAbstract : Seabirds are facing immense pressures, primarily induced by competition with commercial fisheries; this is of considerable concern due to the critical role that they play in marine food webs and their invaluable function as bioindicators. In this thesis, I studied the temporal change in trip duration for the Common Guillemot Uria aalge, a circum-arctic seabird species. READ MORE