Sökning: "reindeer"

Visar resultat 16 - 20 av 98 avhandlingar innehållade ordet reindeer.

1. 16. Effects of herbivory on arctic and alpine vegetation

   Författare :Åsa Lindgren; Ove Eriksson; Jon Moen; Anders Angerbjörn; Ingibjörg S Jónsdóttir; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; herbivory; reindeer; rodents; functional traits; plant species composition; arctic; alpine; tundra; seed limitation; Carex bigelowii; Biology; Biologi; Plant Ecology; växtekologi;

   Sammanfattning : The distribution of plant species and functional traits in alpine and arctic environments are determined by abiotic conditions, but also by biotic interactions. In this thesis, I investigate interactions among plants and herbivory effects on plant community composition and plant functional traits in three different regions: Swedish Lapland, Beringia (USA/Russia) and Finnmark (Norway). LÄS MER

3. 17. Spill : Om djur, hantverk och nätverk i Mälarområdet under vikingatid och medeltid

   Författare :Johnny Karlsson; Jan Storå; Anders Andrén; Mats Roslund; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Craft; Osseous; Antler; Horn; Bone; Teeth; Walrus tusk; Elk; Red deer; Reindeer; Networks; Trade; Exchange; Birka; Sigtuna; Uppsala; Strängnäs; Nyköping; Viking; Medieval; Social Agency; Economic Agency; Archaeological Science; laborativ arkeologi;

   Sammanfattning : This thesis examines the use of various osseous raw materials in craft activities in the Mälaren region during the Middle Ages. Places studied are: Birka, Sigtuna, Nyköping, Strängnäs and Uppsala. The aim is to capture both chronological and spatial changes in the use of osseous raw materials. LÄS MER

4. 18. Det milsvida skogsfolket : Skogssamernas samhälle i omvandling 1650-1800

   Författare :Bertil Marklund; Peter Sköld; Thomas Wallerström; Umeå universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Forest Sami; source study; actors on an economic; social and societal level; fishing; hunting; reindeer husbandry; reindeer herding; population increase; local district court; forest Sami lay assessors; county administrative board; Swedish state; church.; History; historia;

   Sammanfattning : This dissertation shows that the forest Sami of Arvidsjaurbyn (the forest Sami community in Arvidsjaur) were actors on an economic, social and societal level. The parish of Arvidsjaur was founded by the Swedish state in the beginning of the 17th century. The dissertation is a source study. LÄS MER

5. 19. Top-down and bottom-up effects in a Fennoscandian tundra community

   Författare :Doris Grellmann; Lars Ericson; Lauri Oksanen; Richard Inouye; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; consumer-resource interactions; exclosures; food web dynamics; grey-sided voles; lemmings; NPK-fertilization; plant defences; reindeer; soil microbes; vertebrate grazing;

   Sammanfattning : The objective of this thesis was to investigate the effects of mammalian grazers, such as microtine rodents and reindeer, (top-down effects) and nutrient availability (bottom- up effects) on the plant community of a tundra heath.I conducted a large-scale fertilization experiment and studied the impact of grazers using exclosures. LÄS MER

7. 20. Accident Risk and Environmental Assessment : Development of an Assessment Guideline with Examination in Northern Scandinavia

   Författare :Markus Lundkvist; Lennart Strömquist; Christer Jonasson; Rolf Nyberg; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geography; accident; risk; hazard; environmental assessment; geomorphology; railway; road; avalanche; debris flow; rock fall; slush flow; torrent; moose; reindeer; environmental impact assessment; proposal alternatives; Kiruna; Narvik; Geografi; Other earth sciences; Övrig geovetenskap;

   Sammanfattning : In environmental impact assessment (EIA), accident risk should be considered as one impact. However, few studies have compared assessed risk levels with documented accidents. There is thus a need for assessing accuracy of risk assessment methodologies. LÄS MER