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Search: authors:"Øyvind Hammer"

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Linking Geology and Microbiology: Inactive Pockmarks Affect Sediment Microbial Community Structure

Pockmarks are geological features that are found on the bottom of lakes and oceans all over the globe. Some are active, seeping oil or methane, while others are inactive. Active pockmarks are well studied since they harbor specialized microbial communities that proliferate on the seeping compounds. Such communities are not found in inactive pockmarks. Interestingly, inactive...

The nature of Ordovician limestone-marl alternations in the Oslo-Asker District (Norway): witnesses of primary glacio-eustasy or diagenetic rhythms?

ScholarSearch for Claude Monnet in:Nature Research journals • PubMed • Google ScholarSearch for Øyvind Hammer in:Nature Research journals • PubMed • Google ScholarSearch for Thijs R. A. Vandenbroucke in:Nature

Beak and skull shapes of human commensal and non-commensal house sparrows Passer domesticus

Background The granivorous house sparrow Passer domesticus is thought to have developed its commensal relationship with humans with the rise of agriculture in the Middle East some 10,000 years ago, and to have expanded with the spread of agriculture in Eurasia during the last few thousand years. One subspecies, P. d. bactrianus, residing in Central Asia, has apparently maintained...