Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments
Rates of nitrogen fixation and denitrification were measured in Alaskan continental shelf sediments. In some regions, rates of nitrogen fixation and denitrification appeared to be equal; in other areas, rates were significantly different. Potential rates of denitrification were found to be limited p...
Published in: | Applied and Environmental Microbiology |
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Language: | English |
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American Society for Microbiology
1981
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Online Access: | http://dx.doi.org/10.1128/aem.41.2.412-421.1981 https://journals.asm.org/doi/pdf/10.1128/aem.41.2.412-421.1981 |
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crasmicro:10.1128/aem.41.2.412-421.1981 2024-04-14T08:09:49+00:00 Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments Haines, John R. Atlas, Ronald M. Griffiths, Robert P. Morita, Richard Y. 1981 http://dx.doi.org/10.1128/aem.41.2.412-421.1981 https://journals.asm.org/doi/pdf/10.1128/aem.41.2.412-421.1981 en eng American Society for Microbiology https://journals.asm.org/non-commercial-tdm-license Applied and Environmental Microbiology volume 41, issue 2, page 412-421 ISSN 0099-2240 1098-5336 Ecology Applied Microbiology and Biotechnology Food Science Biotechnology journal-article 1981 crasmicro https://doi.org/10.1128/aem.41.2.412-421.1981 2024-03-15T07:50:51Z Rates of nitrogen fixation and denitrification were measured in Alaskan continental shelf sediments. In some regions, rates of nitrogen fixation and denitrification appeared to be equal; in other areas, rates were significantly different. Potential rates of denitrification were found to be limited primarily by the available nitrate substrate. Major regional differences in rates of denitrification were not statistically significant, but significant differences were found for nitrogen fixation rates in different regions of the Alaskan continental shelf. Estimated net losses of nitrogen from Bering Sea sediments were calculated as 1.8 × 10 12 g of N/yr. Experimental exposure of continental shelf sediments to petroleum hydrocarbons reduced rates of nitrogen fixation and denitrification in some cases but not others. Long-term exposure was necessary before a reduction in nitrogen fixation rates was observed; unamended rates of denitrification but not potential denitrification rates (NO 3 − added) were depressed after exposure to hydrocarbons. Article in Journal/Newspaper Bering Sea ASM Journals (American Society for Microbiology) Bering Sea Applied and Environmental Microbiology 41 2 412 421 |
institution |
Open Polar |
collection |
ASM Journals (American Society for Microbiology) |
op_collection_id |
crasmicro |
language |
English |
topic |
Ecology Applied Microbiology and Biotechnology Food Science Biotechnology |
spellingShingle |
Ecology Applied Microbiology and Biotechnology Food Science Biotechnology Haines, John R. Atlas, Ronald M. Griffiths, Robert P. Morita, Richard Y. Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments |
topic_facet |
Ecology Applied Microbiology and Biotechnology Food Science Biotechnology |
description |
Rates of nitrogen fixation and denitrification were measured in Alaskan continental shelf sediments. In some regions, rates of nitrogen fixation and denitrification appeared to be equal; in other areas, rates were significantly different. Potential rates of denitrification were found to be limited primarily by the available nitrate substrate. Major regional differences in rates of denitrification were not statistically significant, but significant differences were found for nitrogen fixation rates in different regions of the Alaskan continental shelf. Estimated net losses of nitrogen from Bering Sea sediments were calculated as 1.8 × 10 12 g of N/yr. Experimental exposure of continental shelf sediments to petroleum hydrocarbons reduced rates of nitrogen fixation and denitrification in some cases but not others. Long-term exposure was necessary before a reduction in nitrogen fixation rates was observed; unamended rates of denitrification but not potential denitrification rates (NO 3 − added) were depressed after exposure to hydrocarbons. |
format |
Article in Journal/Newspaper |
author |
Haines, John R. Atlas, Ronald M. Griffiths, Robert P. Morita, Richard Y. |
author_facet |
Haines, John R. Atlas, Ronald M. Griffiths, Robert P. Morita, Richard Y. |
author_sort |
Haines, John R. |
title |
Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments |
title_short |
Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments |
title_full |
Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments |
title_fullStr |
Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments |
title_full_unstemmed |
Denitrification and Nitrogen Fixation in Alaskan Continental Shelf Sediments |
title_sort |
denitrification and nitrogen fixation in alaskan continental shelf sediments |
publisher |
American Society for Microbiology |
publishDate |
1981 |
url |
http://dx.doi.org/10.1128/aem.41.2.412-421.1981 https://journals.asm.org/doi/pdf/10.1128/aem.41.2.412-421.1981 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Applied and Environmental Microbiology volume 41, issue 2, page 412-421 ISSN 0099-2240 1098-5336 |
op_rights |
https://journals.asm.org/non-commercial-tdm-license |
op_doi |
https://doi.org/10.1128/aem.41.2.412-421.1981 |
container_title |
Applied and Environmental Microbiology |
container_volume |
41 |
container_issue |
2 |
container_start_page |
412 |
op_container_end_page |
421 |
_version_ |
1796307295766839296 |