Ecology of coccolithophores in the Indian sector of the Southern Ocean
The ecology of coccolithophores (including species’ absolute abundance) in the water column (0-200 m) was studied in the Indian sector of the Southern Ocean, along the 45 degrees E meridian south of Madagascar to Antarctica, during austral summer of 2004 (January–March). Temperature, salinity and nu...
Main Authors: | , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2008
|
Subjects: | |
Online Access: | http://drs.nio.org/drs/handle/2264/1049 |
id |
ftnio:oai:dsr.nio.org:2264/1049 |
---|---|
record_format |
openpolar |
spelling |
ftnio:oai:dsr.nio.org:2264/1049 2023-05-15T13:59:28+02:00 Ecology of coccolithophores in the Indian sector of the Southern Ocean Mohan, R. Mergulhao, L.P. Guptha, M.V.S. Rajakumar, A. Thamban, M. AnilKumar, N. Sudhakar, M. Ravindra, R. 2008 http://drs.nio.org/drs/handle/2264/1049 en eng Elsevier Copyright [2008] Elsevier coccolithophores Southern Ocean austral summer Journal Article 2008 ftnio 2012-08-25T20:04:33Z The ecology of coccolithophores (including species’ absolute abundance) in the water column (0-200 m) was studied in the Indian sector of the Southern Ocean, along the 45 degrees E meridian south of Madagascar to Antarctica, during austral summer of 2004 (January–March). Temperature, salinity and nutrient concentrations were measured to establish the relations between environmental parameters and the abundance and species composition of coccolithophore assemblages. Three assemblages were identified: subtropical, subantarctic and polar. The boundaries between the assemblages correspond to the position of the Subtropical Front (STF), the Subantarctic Front (SAF) and the Polar Front (PF). Nutrient concentrations increased from the STF to the PF, and silicate concentrations are negatively correlated to both the abundance and diversity of coccolithophore populations. In contrast, high nitrate concentrations correspond with a high abundance of monospecific assemblages of Emiliania huxleyi at high latitudes. Poleward of the SAF, two morphotypes of E. huxleyi dominate (Type B/C and D). Article in Journal/Newspaper Antarc* Antarctica Southern Ocean National Institute of Oceanography, India: Digital Repository Service (DRS@nio) Southern Ocean Austral Indian |
institution |
Open Polar |
collection |
National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
op_collection_id |
ftnio |
language |
English |
topic |
coccolithophores Southern Ocean austral summer |
spellingShingle |
coccolithophores Southern Ocean austral summer Mohan, R. Mergulhao, L.P. Guptha, M.V.S. Rajakumar, A. Thamban, M. AnilKumar, N. Sudhakar, M. Ravindra, R. Ecology of coccolithophores in the Indian sector of the Southern Ocean |
topic_facet |
coccolithophores Southern Ocean austral summer |
description |
The ecology of coccolithophores (including species’ absolute abundance) in the water column (0-200 m) was studied in the Indian sector of the Southern Ocean, along the 45 degrees E meridian south of Madagascar to Antarctica, during austral summer of 2004 (January–March). Temperature, salinity and nutrient concentrations were measured to establish the relations between environmental parameters and the abundance and species composition of coccolithophore assemblages. Three assemblages were identified: subtropical, subantarctic and polar. The boundaries between the assemblages correspond to the position of the Subtropical Front (STF), the Subantarctic Front (SAF) and the Polar Front (PF). Nutrient concentrations increased from the STF to the PF, and silicate concentrations are negatively correlated to both the abundance and diversity of coccolithophore populations. In contrast, high nitrate concentrations correspond with a high abundance of monospecific assemblages of Emiliania huxleyi at high latitudes. Poleward of the SAF, two morphotypes of E. huxleyi dominate (Type B/C and D). |
format |
Article in Journal/Newspaper |
author |
Mohan, R. Mergulhao, L.P. Guptha, M.V.S. Rajakumar, A. Thamban, M. AnilKumar, N. Sudhakar, M. Ravindra, R. |
author_facet |
Mohan, R. Mergulhao, L.P. Guptha, M.V.S. Rajakumar, A. Thamban, M. AnilKumar, N. Sudhakar, M. Ravindra, R. |
author_sort |
Mohan, R. |
title |
Ecology of coccolithophores in the Indian sector of the Southern Ocean |
title_short |
Ecology of coccolithophores in the Indian sector of the Southern Ocean |
title_full |
Ecology of coccolithophores in the Indian sector of the Southern Ocean |
title_fullStr |
Ecology of coccolithophores in the Indian sector of the Southern Ocean |
title_full_unstemmed |
Ecology of coccolithophores in the Indian sector of the Southern Ocean |
title_sort |
ecology of coccolithophores in the indian sector of the southern ocean |
publisher |
Elsevier |
publishDate |
2008 |
url |
http://drs.nio.org/drs/handle/2264/1049 |
geographic |
Southern Ocean Austral Indian |
geographic_facet |
Southern Ocean Austral Indian |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_rights |
Copyright [2008] Elsevier |
_version_ |
1766268018596249600 |