Sökning: "pacific-ocean"
Visar resultat 1 - 5 av 18 avhandlingar innehållade ordet pacific-ocean.
1. Late Neogene Benthic Foraminifera from the Caribbean Sea and Eastern Equatorial Pacific Ocean
Sammanfattning : .... LÄS MER
2. Late Eocene through Oligocene calcareous nannofossils from the paleo-equatorial Pacific Ocean – taxonomy, preservation history, biochronology and evolution
Sammanfattning : This study aims to unravel the ecological and evolutionary dynamics within the calcareous nannofossil communities at the Eocene/Oligocene (E/O) transition and during the Oligocene time when Cenozoic 'icehouse' conditions were established. The main question this study aims to answer is whether the changes in the nannofossil assemblages were controlled by intrinsic evolutionary trends or if the changes were controlled by environmental factors such as changes in temperature and nutrient availability in the surface water. LÄS MER
3. Pliocene foraminiferal biostratigraphy and paleoceanography of the Ontong Java Plateau, western equatorial Pacific Ocean
Sammanfattning : .... LÄS MER
4. Diazotrophy and diversity of benthic cyanobacteria in tropical coastal zones
Sammanfattning : Discoveries in recent years have disclosed the importance of marine cyano-bacteria in the context of primary production and global nitrogen cycling. It is hypothesized here that microbial mats in tropical coastal habitats harbour a rich diversity of previously uncharacterized cyanobacteria and that benthic marine nitrogen fixation in coastal zones is substantial. LÄS MER
5. To be together or not to be together : Ca. 100 million years of evolutionary history of the earliest divergent Frankia clade
Sammanfattning : Root nodule symbiosis evolved ca. 100 Mya between a nitrogen-fixing bacterium and the common ancestor to the Fabales, Fagales, Rosales, and Cucurbitales plant orders. Over time the majority of the lineages derived from this ancestor lost their symbiotic capability. LÄS MER