Sökning: "South Atlantic"

Visar resultat 1 - 5 av 28 uppsatser innehållade orden South Atlantic.

  1. 1. Potential migration routes for the alien species, pink salmon (Oncorhynchus gorbuscha) : investigating access in west and south coast rivers of Sweden

    Kandidat-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Rebecca Martin; [2023]
    Nyckelord :invasive; alien species; salmonid; anadromous; migration barriers;

    Sammanfattning : Invasive alien species are one of the main drivers of ecosystem change globally, presenting challenges to biodiversity that take many forms Pink salmon, Oncorhynchus gorbuscha, has recently been observed on the Swedish west coast where its presence is the result of secondary spreading from populations introduced to the White and Barents Seas in northwestern Russia. In Sweden, O. LÄS MER

  2. 2. The Biogeographical Extent and Global Synchronicity of the Late Miocene Reticulofenestra pseudoumbilicus Paracme

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Joseph Asanbe; [2022]
    Nyckelord :late Miocene; biogenic bloom; nannofossil biostratigraphy; paleo-productivity; Reticulofenestra size variation;

    Sammanfattning : Previous biostratigraphic studies in the Indian Ocean, equatorial Pacific, Atlantic Ocean and the Caribbean Sea document the temporal disappearance of Reticulofenestra pseudoumbilicus in the late Miocene (Tortonian age). This interval has been subsequently defined as the R. pseudoumbilicus paracme. LÄS MER

  3. 3. Är den sydatlantiska magnetiska anomalin ett återkommande fenomen?

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Nils Friberg; [2020]
    Nyckelord :sydatlantiska anomalin; magnetiska reversaler; magnetiska exkursioner; magnetfältsmodellering; Barombi Mbo; Earth and Environmental Sciences;

    Sammanfattning : The South Atlantic Anomaly (SAA) is the area with a weak magnetic field that extends from the western coast of Africa to inland Brazil. During the last 160 years, the area that covers the SAA has had an increase in size with a simultaneous, slow westward movement. LÄS MER

  4. 4. Submarine Alteration of Seamount Rocks in the Canary Islands: Insights from Mineralogy, Trace Elements, and Stable Isotopes

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Aduragbemi Oluwatobi Sofade; [2018]
    Nyckelord :Canary Islands; seamounts; submarine alteration; trace elements; nannofossils; Kanarieöarna; djuphavsberg; undervattensomvandling; spårämnen; nanofossiler;

    Sammanfattning : Seamounts play an important role in facilitating the exchange of elements between the oceanic lithosphere and the overlying seawater. This water-rock interaction is caused by circulating seawater and controls the chemical exchange in submarine and sub-seafloor rocks. LÄS MER

  5. 5. Genetics of bird migration : Study on East Siberian willow warblers (Phylloscopus trochilus)

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Kristaps Sokolovskis; [2017]
    Nyckelord :birds; willow warblers; phylloscopus trochilus; leaf warblers; migration; genetics; stable isotopes; eastern siberia;

    Sammanfattning : Seasonal long-distance bird migration between wintering and breeding grounds is oneof the most remarkable phenomena in the history of life on earth. Migration strategies androutes vary greatly. Some birds migrate in social groups whilst others migrate alone at night,some cross few hundreds of km whilst others cover thousands of km. LÄS MER