Sökning: "trophic effects"
Visar resultat 6 - 10 av 137 avhandlingar innehållade orden trophic effects.
Sammanfattning : Size-dependent differences between individuals in size-structured organisms have fundamental effect on population and community dynamics. Intraguild predation (IGP) is one specifically interesting constellation that often arises when two size-structured populations interact. LÄS MER
Sammanfattning : Contamination of surface waters is a worldwide problem. One group of emerging contaminants that reach aquatic ecosystems via sewage treatment plant effluents and agricultural run-offs is pharmaceuticals. LÄS MER
Sammanfattning : Cholecystokinin (CCK) is known to exert secretory and trophic effects on the pancreas. Its release from the intestinal mucosa is regulated by pancresic proteases in the small intestine. However, knowledge about the type of responding exocrine cells and the time course of events during stimulation with CCK is lacking. LÄS MER
Sammanfattning : Aquatic ecosystems cover approximately 70% of the Earth’s surface and support a wide range of ecosystem services. Despite their importance, aquatic ecosystems are increasingly exposed to anthropogenic stressors, such as contaminants and climate change impacts. LÄS MER
Sammanfattning : ÑSpinal cord injury is common in the modern society, often afflictsyoung individuals, and often has devastating consequences. The present workstudies possibilities to obtain better conditions for regeneration of the transectedspinal cord in rats, conditions under which spinal cord grafts are able toestablish structural and functional connections with "natural" targets, andeffects of a series of neurotrophic factors on spinal cord graft survival andgrowth. LÄS MER