Search for dissertations about: "dispersal distribution"

Showing result 1 - 5 of 113 swedish dissertations containing the words dispersal distribution.

2. 1. Distribution patterns of fleshy-fruited woody plants at local and regional scales

   Author : Matilda Arnell; Ove Eriksson; Johan Ehrlén; Sara A.O. Cousins; Angela Moles; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fleshy fruits; woody plants; dispersal; distribution patterns; range filling; dispersal limitation; historical land use; spatial associations; point-pattern analysis; recruitment; reproduction; pollination; fruit set; fruit-removal; Daphne mezereum; Plant Ecology; växtekologi;

   Abstract : Fleshy-fruited woody plants share a long history with humans, providing us with food and wood material. Because of this relation, we have actively moved some of these plants across landscapes and continents. READ MORE

4. 2. Genetic structure and dispersal in plant populations

   Author : Johan Fogelqvist; Martin Lascoux; Sophie Gerber; Beng-Olle Bengtsson; Uppsala universitet; []
   Keywords : population genetics; dispersal; structure; plant; gene flow;

   Abstract : This thesis focuses on the spatial structure and methods to identify spatial structure in plants. Methods that investigate genetic structure can mainly be divided into equilibrium methods that reveal summed dispersal over many generations, and cluster methods, that reveal more recent dispersal events. READ MORE

5. 3. Distribution Patterns and Metapopulation Dynamics of Epiphytic Mosses and Lichens

   Author : Tord Snäll; Håkan Rydin; Johan Ehrlén; Christine Ray; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; plant; metapopulation; model; parameterization; connectivity; dispersal; colonization; extinction; epiphytic; bryophyte; lichen; boreal; fragmentation; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Abstract : This thesis examines the relative importance of local conditions, dispersal and dynamics of the trees on epiphyte distribution patterns and colonization-extinction dynamics. Study species are the mosses Orthotrichum speciosum and O. obtusifolium, and the red-listed Neckera pennata. READ MORE

6. 4. Interaction between dispersal and behavioural syndromes - empirical approach in a fragmented population of passerine birds

   Author : Gregory Daniel; Blandine Doligez; Lars Gustafsson; Thierry Boulinier; Uppsala universitet; []
   Keywords : dispersal; behavioural syndromes; heritability; personality traits; neophobia; aggressiveness; risk-taking behaviour; collared flycatcher; Ficedulla albicollis; dispersion; syndromes comportementaux; héritabilité; traits de personnalité; néophibie; aggressivité; prise de risque; gobemouche à collier; Ficedulla albicollis; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

   Abstract : Dispersal is a key life history trait for ecological and evolutionary processes in wild populations. The latest research has particularly focused on the correlation between behavioural traits and dispersal, in order to emphasize the existence of behavioural syndromes of dispersal, and on the estimation of the genetic basis of the dispersal behaviour. READ MORE

7. 5. Ecology of parasitoids and their hosts in oilseed rape fields

   Author : Josef Berger; Biodiversitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; parasitoids; herbivores; oilseed rape; pollen beetle; cabbage stem weevil; parasitoid community; niche separation; landscape scale; community composition; landscape configuration; Species abundance distribution SAD models; dispersal; metacommunity;

   Abstract : Oilseed rape fields are a very common crop in the agricultural landscape of southern Sweden, and they can harbour surprisingly many insect species. Some of them are herbivores that feed on various parts of the oilseed rape plant, others are natural enemies of the herbivores, and even more species are tourists from the surrounding landscape. READ MORE