Search for dissertations about: "predators"

Showing result 1 - 5 of 179 swedish dissertations containing the word predators.

2. 1. Negotiating Wilderness in a Cultural Landscape : Predators and Saami Reindeer Herding in the Laponian World Heritage Area

   Author : Åsa Nilsson Dahlström; Hugh Beach; Robert Paine; Uppsala universitet; []
   Keywords : HUMANIORA; HUMANITIES; Cultural anthropology; Laponia; wilderness; cultural landscape; world heritage area; Saami; reindeer herding; predators; Sweden; Kulturantropologi; Cultural anthropology; Kulturantropologi; Kulturantropologi; Cultural Anthropology;

   Abstract : The UNESCO appointment of the Laponian World Heritage Area in 1996 meant that Sweden accepted the assignment of protecting both the cultural and natural values of this area for all mankind and all generations to come. Located in northern Sweden, Laponia had previously been protected for its natural values only, but the 1996 appointment determined that the local Saami reindeer herding culture should also be preserved. READ MORE

4. 2. The importance of predation in benthic stream communities

   Author : Jonas Dahl; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Ekologi; Ecology; invertebrate predators; vertebrate predators; Predation; streams;

   Abstract : There has been considerable debate whether or not predators has any significant effects on prey densities in streams. This thesis examines the importance of predation in stream communities. I have conducted both field and laboratory studies where I have studied how both vertebrate and invertebrate predators affects benthic prey. READ MORE

5. 3. The Spider and the Sea : Effects of marine subsidies on the role of spiders in terrestrial food webs

   Author : Kajsa Mellbrand; Peter Hambäck; Lena Kautsky; David Wise; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; marine subsidies; food webs; stable isotopes; shore ecosystems; predators; spiders; Pardosa; algae; emerging insects; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Plant Ecology; växtekologi;

   Abstract : The purpose of this study was to identify if terrestrial arthropod predators on Baltic Sea shores vary in their use of marine versus terrestrial food items, and to construct a bottom-up food web for Baltic Sea shores. The inflow of marine nutrients in the area consists mainly of marine algal detritus and emerging aquatic insects (e.g. READ MORE

6. 4. Attacking predators and fleeing prey : detection, escape and targeting behaviour in birds

   Author : Ulrika Kaby; Innes Cuthill; Stockholms universitet; []
   Keywords : zoology; ethology; birds; animal behaviour;

   Abstract : The aim of this thesis is to further our understanding of predator and prey behaviour and decision making in different attack situations. The thesis deals with escape strategies, predator detection ability and prey targeting behaviour. READ MORE

7. 5. Modelling Aspects of Wastewater Treatment Processes

   Author : Ulf Jeppsson; Industriell elektroteknik och automation; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Automatiska system; control engineering; robotics; Automation; thickening; solids flux; simulation; secondary clarifier; protozoa; predators; parameter estimation; model reduction; model identifiability; mathematical modelling; clarification; biofilm; activated sludge; robotteknik; reglerteknik;

   Abstract : Wastewater treatment processes are inherently dynamic because of the large variations in the influent wastewater flow rate, concentration and composition. Moreover, these variations are to a large extent not possible to control. READ MORE