Presence and distribution of heterotrophic denitrifying bacteria in the Eastern Tropical North Pacific oxygen minimum zone in relation to environmental parameters

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Presence and distribution of heterotrophic denitrifying bacteria in the Eastern Tropical North Pacific oxygen minimum zone in relation to environmental parameters

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dc.contributor.author Geurtsen, Sara
dc.date.accessioned 2012-08-24T23:56:25Z
dc.date.available 2012-08-24T23:56:25Z
dc.date.issued 2012-06
dc.identifier.uri http://hdl.handle.net/1773/20486
dc.description Senior thesis written for Oceanography 444 en_US
dc.description.abstract [Author's Abstract] The marine nitrogen cycle plays an important role in primary productivity by supplying primary producers with the essential nutrient nitrate. The expansion of oxygen minimum zones in the oceans is causing increasing concerns about its implications for nutrient cycles such as the nitrogen cycle. Oxygen minimum zones are sites of a process called heterotrophic denitrification, which results in the removal of large amounts of biologically reactive nitrogen from the oceans. Heterotrophic denitrifying bacteria perform this process by converting nitrate into dinitrogen gas. Dinitrogen gas is not very soluble in seawater and escapes to the atmosphere. I investigated the presence of heterotrophic denitrifying bacteria in the Eastern Tropical North Pacific oxygen minimum zone to assess their contribution to nitrogen removal in this area. I found heterotrophic denitrifying bacteria at two different stations and evidence of active heterotrophic denitrification at multiple stations. This suggests that heterotrophic denitrifying bacteria play an active role in nitrogen removal in the Eastern Tropical North Pacific oxygen minimum zone. en_US
dc.language.iso en_US en_US
dc.relation.ispartofseries Proceedings from the University of Washington School of Oceanography Senior Thesis, Academic Year 2011-2012;
dc.subject Marine productivity--Eastern Tropical North Pacific Ocean en_US
dc.subject Denitrification en_US
dc.title Presence and distribution of heterotrophic denitrifying bacteria in the Eastern Tropical North Pacific oxygen minimum zone in relation to environmental parameters en_US
dc.type Article en_US


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