Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9
Seawater samples below the Ross Ice Shelf were collected through an access hole at J9, approximately 400 kilometers from the Ross Sea, Antarctica. The 237-meter water column had sparse populations of bacteria (8.7 × 10 6 to 1.2 × 10 7 per liter), microplankters (10 2 to 10 3 per cubic meter), and zo...
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Language: | English |
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American Association for the Advancement of Science (AAAS)
1979
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Online Access: | http://dx.doi.org/10.1126/science.203.4379.451 https://www.science.org/doi/pdf/10.1126/science.203.4379.451 |
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craaas:10.1126/science.203.4379.451 2024-06-09T07:38:37+00:00 Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9 Azam, F. Beers, J. R. Campbell, L. Carlucci, A. F. Holm-Hansen, O. Reid, F. M. H. Karl, D. M. 1979 http://dx.doi.org/10.1126/science.203.4379.451 https://www.science.org/doi/pdf/10.1126/science.203.4379.451 en eng American Association for the Advancement of Science (AAAS) Science volume 203, issue 4379, page 451-453 ISSN 0036-8075 1095-9203 journal-article 1979 craaas https://doi.org/10.1126/science.203.4379.451 2024-05-16T12:55:49Z Seawater samples below the Ross Ice Shelf were collected through an access hole at J9, approximately 400 kilometers from the Ross Sea, Antarctica. The 237-meter water column had sparse populations of bacteria (8.7 × 10 6 to 1.2 × 10 7 per liter), microplankters (10 2 to 10 3 per cubic meter), and zooplankters (10 to 20 per cubic meter) at the depths studied. Microbial biomass estimates from cellular adenosine 5′-triphosphate measurements were very low (10 to 150 nanograms of carbon per liter), comparable with values for the abyssal ocean. Microbial populations assimilated tritiated D-glucose, thymidine, uridine, and adenosine triphosphate at extremely low rates, comparable with deep-sea heterotrophic populations. Sediment samples had 10 7 to 10 8 bacteria per gram (dry weight), which were metabolically active as shown by respiration of uniformly labeled D-[ 14 C]glucose. From this study it cannot be determined whether these organisms in the water column and sediments constitute a functioning food web. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Sea AAAS Resource Center (American Association for the Advancement of Science) Ross Ice Shelf Ross Sea Science 203 4379 451 453 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Seawater samples below the Ross Ice Shelf were collected through an access hole at J9, approximately 400 kilometers from the Ross Sea, Antarctica. The 237-meter water column had sparse populations of bacteria (8.7 × 10 6 to 1.2 × 10 7 per liter), microplankters (10 2 to 10 3 per cubic meter), and zooplankters (10 to 20 per cubic meter) at the depths studied. Microbial biomass estimates from cellular adenosine 5′-triphosphate measurements were very low (10 to 150 nanograms of carbon per liter), comparable with values for the abyssal ocean. Microbial populations assimilated tritiated D-glucose, thymidine, uridine, and adenosine triphosphate at extremely low rates, comparable with deep-sea heterotrophic populations. Sediment samples had 10 7 to 10 8 bacteria per gram (dry weight), which were metabolically active as shown by respiration of uniformly labeled D-[ 14 C]glucose. From this study it cannot be determined whether these organisms in the water column and sediments constitute a functioning food web. |
format |
Article in Journal/Newspaper |
author |
Azam, F. Beers, J. R. Campbell, L. Carlucci, A. F. Holm-Hansen, O. Reid, F. M. H. Karl, D. M. |
spellingShingle |
Azam, F. Beers, J. R. Campbell, L. Carlucci, A. F. Holm-Hansen, O. Reid, F. M. H. Karl, D. M. Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9 |
author_facet |
Azam, F. Beers, J. R. Campbell, L. Carlucci, A. F. Holm-Hansen, O. Reid, F. M. H. Karl, D. M. |
author_sort |
Azam, F. |
title |
Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9 |
title_short |
Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9 |
title_full |
Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9 |
title_fullStr |
Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9 |
title_full_unstemmed |
Occurrence and Metabolic Activity of Organisms Under the Ross Ice Shelf, Antarctica, at Station J9 |
title_sort |
occurrence and metabolic activity of organisms under the ross ice shelf, antarctica, at station j9 |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1979 |
url |
http://dx.doi.org/10.1126/science.203.4379.451 https://www.science.org/doi/pdf/10.1126/science.203.4379.451 |
geographic |
Ross Ice Shelf Ross Sea |
geographic_facet |
Ross Ice Shelf Ross Sea |
genre |
Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Sea |
genre_facet |
Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Sea |
op_source |
Science volume 203, issue 4379, page 451-453 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.203.4379.451 |
container_title |
Science |
container_volume |
203 |
container_issue |
4379 |
container_start_page |
451 |
op_container_end_page |
453 |
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1801374217209380864 |