Sökning: "Ecosystem evolution"
Visar resultat 16 - 20 av 50 avhandlingar innehållade orden Ecosystem evolution.
16. Managing Platform-Mediated Ecosystems : Investigating ecosystem interdependencies and strategic choices
Sammanfattning : The rapid and ubiquitous spread of information technologies (IT) is creating unprecedented effects that challenge traditional fundamentals of the business world. Platform-mediated ecosystems are increasingly attracting the attention of practitioners from diverse industries, from telecommunications to video consoles, as well as academics from different fields ranging from management to economics, and information systems (IS) and innovation management. LÄS MER
17. Why is it so challenging to cultivate open government data? : Understanding impediments from an ecosystem perspective
Sammanfattning : Introduction: This compilation licentiate thesis focuses on open government data (OGD). The thesis is based on three papers. OGD is a system that is organized when publishers collect and share data with users, who can unrestrictedly reuse the data. In my research, I have explored why it can be challenging to cultivate OGD. LÄS MER
18. Forest-savanna transitions: Understanding adaptation and resilience of the tropical forest ecosystems using remote sensing
Sammanfattning : Climate and deforestation-induced changes in precipitation drive tropical forest-savanna transitions. However, precipitation alone provides a superficial understanding of the underlying mechanism behind these transitions. This is because our knowledge of how vegetation responds to changes in hydroclimate is fragmented. LÄS MER
19. Novel approaches to the environments and ecosystems of the fish-tetrapod transition
Sammanfattning : The fish-tetrapod transition is one of the most important evolutionary events in Earth’s history, giving rise to terrestrial vertebrates around 390 million years ago. It set the stage for a series of evolutionary events that ultimately resulted in modern-day terrestrial vertebrates including ourselves. LÄS MER
20. Functional Traits in Sphagnum
Sammanfattning : Peat mosses (Sphagnum) are ecosystem engineers that largely govern carbon sequestration in northern hemisphere peatlands. I investigated functional traits in Sphagnum species and addressed the questions: (I) Are growth, photosynthesis and decomposition and the trade-offs between these traits related to habitat or phylogeny?, (II) Which are the determinants of decomposition and are there trade-offs between metabolites that affect decomposition?, (III) How do macro-climate and local environment determine growth in Sphagnum across the Holarctic?, (IV) How does N2 fixation vary among different species and habitats?, (V) How do species from different microtopographic niches avoid or tolerate desiccation, and are leaf and structural traits adaptations to growth high above the water table?Photosynthetic rate and decomposition in laboratory conditions (innate growth and decay resistance) were related to growth and decomposition in their natural habitats. LÄS MER
