Regional distributions of nitrogen-fixing bacteria
We evaluated the regional distributions of six nitrogen (N2)-fixing bacteria in the North Pacific Ocean using quantitative polymerase chain reaction amplification of planktonic nifH genes. Samples were collected on four oceanographic research cruises between March 2002 and May 2005 that spanned a la...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.567.6641 2023-05-15T15:08:41+02:00 Regional distributions of nitrogen-fixing bacteria Matthew J. Church Karin M. Björkman David M. Karl Mak A. Saito Jonathan P. Zehr The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6641 http://hahana.soest.hawaii.edu/lab/dkarl/2008L%26O53-63-77.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6641 http://hahana.soest.hawaii.edu/lab/dkarl/2008L%26O53-63-77.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hahana.soest.hawaii.edu/lab/dkarl/2008L%26O53-63-77.pdf text 2008 ftciteseerx 2016-01-08T12:20:23Z We evaluated the regional distributions of six nitrogen (N2)-fixing bacteria in the North Pacific Ocean using quantitative polymerase chain reaction amplification of planktonic nifH genes. Samples were collected on four oceanographic research cruises between March 2002 and May 2005 that spanned a latitudinal range from 12uS and 54uN between 152uW and 170uW. Samples were collected throughout the upper ocean (,200 m) in the northern regions of the South Pacific Subtropical Gyre (SPSG), equatorial waters, the North Pacific Subtropical Gyre (NPSG), the North Pacific Transitional Zone (NPTZ), and within the Pacific Sub Arctic Gyre (PSAG). There were distinct spatial gradients in concentrations of nutrients, chlorophyll, and the abundances of N2-fixing bacteria within the various oceanic biomes. In general, nifH-containing bacteria were most abundant in the midregions of the NPSG (latitudes between,14uN and 29uN), where unicellular cyanobacterial phylotypes dominated nifH gene abundances. The abundances of all nifH-containing groups declined within the northern and southern regions of NPSG. Although nifH-containing groups were detectable in the northern regions of the SPSG, throughout the equatorial waters, and within the NPTZ, gene copy abundances of most groups were lower in these regions than those found the in the NPSG. In the NPSG, surface water abundances of the various nifH phylotypes examined ranged from,50 copies L21 to,105 nifH copies L21. Overall, the abundances of an Text Arctic Unknown Arctic Pacific |
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ftciteseerx |
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English |
description |
We evaluated the regional distributions of six nitrogen (N2)-fixing bacteria in the North Pacific Ocean using quantitative polymerase chain reaction amplification of planktonic nifH genes. Samples were collected on four oceanographic research cruises between March 2002 and May 2005 that spanned a latitudinal range from 12uS and 54uN between 152uW and 170uW. Samples were collected throughout the upper ocean (,200 m) in the northern regions of the South Pacific Subtropical Gyre (SPSG), equatorial waters, the North Pacific Subtropical Gyre (NPSG), the North Pacific Transitional Zone (NPTZ), and within the Pacific Sub Arctic Gyre (PSAG). There were distinct spatial gradients in concentrations of nutrients, chlorophyll, and the abundances of N2-fixing bacteria within the various oceanic biomes. In general, nifH-containing bacteria were most abundant in the midregions of the NPSG (latitudes between,14uN and 29uN), where unicellular cyanobacterial phylotypes dominated nifH gene abundances. The abundances of all nifH-containing groups declined within the northern and southern regions of NPSG. Although nifH-containing groups were detectable in the northern regions of the SPSG, throughout the equatorial waters, and within the NPTZ, gene copy abundances of most groups were lower in these regions than those found the in the NPSG. In the NPSG, surface water abundances of the various nifH phylotypes examined ranged from,50 copies L21 to,105 nifH copies L21. Overall, the abundances of an |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Matthew J. Church Karin M. Björkman David M. Karl Mak A. Saito Jonathan P. Zehr |
spellingShingle |
Matthew J. Church Karin M. Björkman David M. Karl Mak A. Saito Jonathan P. Zehr Regional distributions of nitrogen-fixing bacteria |
author_facet |
Matthew J. Church Karin M. Björkman David M. Karl Mak A. Saito Jonathan P. Zehr |
author_sort |
Matthew J. Church |
title |
Regional distributions of nitrogen-fixing bacteria |
title_short |
Regional distributions of nitrogen-fixing bacteria |
title_full |
Regional distributions of nitrogen-fixing bacteria |
title_fullStr |
Regional distributions of nitrogen-fixing bacteria |
title_full_unstemmed |
Regional distributions of nitrogen-fixing bacteria |
title_sort |
regional distributions of nitrogen-fixing bacteria |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6641 http://hahana.soest.hawaii.edu/lab/dkarl/2008L%26O53-63-77.pdf |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
http://hahana.soest.hawaii.edu/lab/dkarl/2008L%26O53-63-77.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.6641 http://hahana.soest.hawaii.edu/lab/dkarl/2008L%26O53-63-77.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766339991203479552 |