Sökning: "marine species"
Visar resultat 6 - 10 av 341 avhandlingar innehållade orden marine species.
6. Benthic use of phytoplankton blooms: uptake, burial and biodiversity effects in a species-poor system
Sammanfattning : Animals living in marine sediments (the second largest habitat on earth) play a major role in global biogeochemical cycling. By feeding on organic matter from settled phytoplankton blooms they produce food for higher trophic levels and nutrients that can fuel primary production. LÄS MER
7. Modelling spatial and temporal species distribution in the Baltic Sea phytobenthic zone
Sammanfattning : Statistical modelling is often used to relate the presence or abundance of species to environmental predictors, thereby providing a basis for predictive mapping of species or biodiversity. The variables included must thus be relevant and reflect actual changes in the environment. LÄS MER
8. Effects of community- and government-managed marine protected areas on tropical seagrass and coral communities
Sammanfattning : Tropical seagrass beds and coral reefs are among the most productive and diverse ecosystems on Earth and provide ecosystem services, such as fish production and coastal protection, and support livelihoods of millions of people. At the same time, these ecosystems are threatened globally by anthropogenic disturbances, such as overfishing, pollution and global warming. LÄS MER
9. Investigations of species richness effects on ecosystem functioning using stream-living macroinvertebrates as model organisms
Sammanfattning : The work in this thesis deals with effects of changed species richness on process rates among stream-living macroinvertebrates. Global biodiversity is decreasing rapidly and it is poorly known what the consequences of this loss may be for ecosystems and the services they provide. LÄS MER
10. The importance of biodiversity for ecosystem processes in sediments : experimental examples from the Baltic Sea
Sammanfattning : Aquatic sediments are, by surface, the largest habitat on Earth. A wide diversity of organisms inhabit these sediments and by their actions they have a large influence on and also mediate many ecosystem processes. LÄS MER