On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice
Abstract: The sea ice of both of the Earth's polar regions contains an internal system of delicate brine channels and pockets which serve as a habitat for a variety of organisms including plants and animals. The large standing stock of algae in the ice provides an ample food source for heterotr...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.599.8961 2023-05-15T13:56:22+02:00 On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice Michael Spindler The Pennsylvania State University CiteSeerX Archives 1996 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.8961 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1996-Spindler.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.8961 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1996-Spindler.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/1996-Spindler.pdf text 1996 ftciteseerx 2016-01-08T13:54:47Z Abstract: The sea ice of both of the Earth's polar regions contains an internal system of delicate brine channels and pockets which serve as a habitat for a variety of organisms including plants and animals. The large standing stock of algae in the ice provides an ample food source for heterotrophic consumers. The sea ice habitat is characterised by low temperatures and correspondingly high salinities. During winter, temperatures as low as- 15 % and salinities as high as 177 psu were recorded in the brine channel system of the upper part of Antarctic sea ice. The tolerance of sympagic organisms to increased salinities is remarkable. Algae grow in salinities of up to 95 psu and also sea ice animals can survive, grow and partly reproduce under high salinities. The foraminifer Neogloboquadrina pachyderma was subjected to a variety of different salinities. Formation of new chambers occurs in salinities of up to 58 psu, specimens survive 82 psu for at least a week, and drastic changes in salinity are tolerated, e.g. direct transfer from 30 to 60 psu or from 60 to 40 psu. Chamber formation rates are slightly slower at higher salinities and the final size of specimens decreases with increasing salinity. Reproduction was never observed in salinities above 50 psu, which corroborates earlier results that N. pachyderma does not reproduce within the sea ice. 1. Text Antarc* Antarctic Neogloboquadrina pachyderma Sea ice Unknown Antarctic |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
Abstract: The sea ice of both of the Earth's polar regions contains an internal system of delicate brine channels and pockets which serve as a habitat for a variety of organisms including plants and animals. The large standing stock of algae in the ice provides an ample food source for heterotrophic consumers. The sea ice habitat is characterised by low temperatures and correspondingly high salinities. During winter, temperatures as low as- 15 % and salinities as high as 177 psu were recorded in the brine channel system of the upper part of Antarctic sea ice. The tolerance of sympagic organisms to increased salinities is remarkable. Algae grow in salinities of up to 95 psu and also sea ice animals can survive, grow and partly reproduce under high salinities. The foraminifer Neogloboquadrina pachyderma was subjected to a variety of different salinities. Formation of new chambers occurs in salinities of up to 58 psu, specimens survive 82 psu for at least a week, and drastic changes in salinity are tolerated, e.g. direct transfer from 30 to 60 psu or from 60 to 40 psu. Chamber formation rates are slightly slower at higher salinities and the final size of specimens decreases with increasing salinity. Reproduction was never observed in salinities above 50 psu, which corroborates earlier results that N. pachyderma does not reproduce within the sea ice. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Michael Spindler |
spellingShingle |
Michael Spindler On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice |
author_facet |
Michael Spindler |
author_sort |
Michael Spindler |
title |
On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice |
title_short |
On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice |
title_full |
On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice |
title_fullStr |
On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice |
title_full_unstemmed |
On the salinity tolerance of the planktonic foraminifer Neogloboquadrina pachyderma from Antarctic sea ice |
title_sort |
on the salinity tolerance of the planktonic foraminifer neogloboquadrina pachyderma from antarctic sea ice |
publishDate |
1996 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.8961 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1996-Spindler.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Neogloboquadrina pachyderma Sea ice |
genre_facet |
Antarc* Antarctic Neogloboquadrina pachyderma Sea ice |
op_source |
http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1996-Spindler.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.599.8961 http://polaris.nipr.ac.jp/~penguin/polarbiosci/issues/pdf/1996-Spindler.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766263849870163968 |