GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O
Abstract: Laboratory culture experiments were conducted with marine phyto-plankton isolated from the Southern Ocean to determine the growth responses to iron enrichment. Batch cultures of ten diatom clones and two Phaeocystis clones were grown under various total iron concentrations (0.1-10.1 nM) us...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.499.3730 2023-05-15T14:02:35+02:00 GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O Iron Enrichment Shigenobu Takeda Kentaro Watanabe The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.499.3730 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1997-Takeda.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.499.3730 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1997-Takeda.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1997-Takeda.pdf text ftciteseerx 2016-01-08T08:57:41Z Abstract: Laboratory culture experiments were conducted with marine phyto-plankton isolated from the Southern Ocean to determine the growth responses to iron enrichment. Batch cultures of ten diatom clones and two Phaeocystis clones were grown under various total iron concentrations (0.1-10.1 nM) using trace metal clean techniques. These Antarctic phytoplankton clones responded to iron enrich-ment by increasing their growth rates. When growth rates are plotted against the total iron concentration on a semilogarithmic graph, the growth curves may be grouped into three patterns. Odontella weissflogii showed a linear increase with total iron. Chaetoceros dichaeta (clone AA-B-40 and C-21), Chaetoceros hendeyi, Nitzschia sp. 1 and sp. 4, Phaeocystis sp. 1 and sp. 2 showed hyperbolic increase with total iron from 0.1 nM. Corethron criophilum, Nitzschia sp. 2, sp. 3, and sp. 5 showed hyperbolic increase with total iron from 0.2 nM, or a sigmoid pattern. There was no clear difference in their growth response to iron enrichment between isolates from the open ocean and marginal ice waters. The dependence of growth rates on cell volume size was also insignificant. Our results suggest that Antarctic phytoplank-ton may respond differentially and significantly to changes of iron level even within the natural fluctuation in the Southern Ocean. 1. Text Antarc* Antarctic Southern Ocean Unknown Antarctic Southern Ocean |
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English |
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Abstract: Laboratory culture experiments were conducted with marine phyto-plankton isolated from the Southern Ocean to determine the growth responses to iron enrichment. Batch cultures of ten diatom clones and two Phaeocystis clones were grown under various total iron concentrations (0.1-10.1 nM) using trace metal clean techniques. These Antarctic phytoplankton clones responded to iron enrich-ment by increasing their growth rates. When growth rates are plotted against the total iron concentration on a semilogarithmic graph, the growth curves may be grouped into three patterns. Odontella weissflogii showed a linear increase with total iron. Chaetoceros dichaeta (clone AA-B-40 and C-21), Chaetoceros hendeyi, Nitzschia sp. 1 and sp. 4, Phaeocystis sp. 1 and sp. 2 showed hyperbolic increase with total iron from 0.1 nM. Corethron criophilum, Nitzschia sp. 2, sp. 3, and sp. 5 showed hyperbolic increase with total iron from 0.2 nM, or a sigmoid pattern. There was no clear difference in their growth response to iron enrichment between isolates from the open ocean and marginal ice waters. The dependence of growth rates on cell volume size was also insignificant. Our results suggest that Antarctic phytoplank-ton may respond differentially and significantly to changes of iron level even within the natural fluctuation in the Southern Ocean. 1. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Iron Enrichment Shigenobu Takeda Kentaro Watanabe |
spellingShingle |
Iron Enrichment Shigenobu Takeda Kentaro Watanabe GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O |
author_facet |
Iron Enrichment Shigenobu Takeda Kentaro Watanabe |
author_sort |
Iron Enrichment |
title |
GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O |
title_short |
GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O |
title_full |
GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O |
title_fullStr |
GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O |
title_full_unstemmed |
GROWTH RESPONSE O F ANTARCTIC PHYTOPLANKTON T O |
title_sort |
growth response o f antarctic phytoplankton t o |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.499.3730 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1997-Takeda.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1997-Takeda.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.499.3730 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1997-Takeda.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766272904596553728 |