2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro
The Antarctic marine environment is characterized by the extreme seasonality of the primary production in the water column and the low but stable temperatures. Both are considered the main factors in the adaptative evolution of Antarctic ectothermic organisms. Studies about physiological and biochem...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.455.2491 2023-05-15T13:43:36+02:00 2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro Edson Rodrigues Gannabathula Sree Vani Helena Passeri Lavrado São Paulo Brasil Cep The Pennsylvania State University CiteSeerX Archives http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.2491 http://www.oecologiaaustralis.org/ojs/index.php/oa/article/download/165/91/ en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.2491 http://www.oecologiaaustralis.org/ojs/index.php/oa/article/download/165/91/ Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.oecologiaaustralis.org/ojs/index.php/oa/article/download/165/91/ text ftciteseerx 2016-01-08T06:08:43Z The Antarctic marine environment is characterized by the extreme seasonality of the primary production in the water column and the low but stable temperatures. Both are considered the main factors in the adaptative evolution of Antarctic ectothermic organisms. Studies about physiological and biochemical processes of the cold-adapted species revealed the presence of antifreeze glycoproteins in the biological fluids and cold-adapted proteins. The low and stable temperatures have resulted in the appearence of enzymes with high catalytic efficiency and the absence of the thermal stress proteins in some Antarctic fishes. The austral winter promotes a seasonal food shortage, submitting the benthic ectotherms to long periods of starvation. This is particularly true for the organisms that depend on phytoplankton as their primary source of food. The Antarctic marine environment also presents areas of high copper concentrations on the sediment surface as well as cadmium in the water column. The bivalve Laternula elliptica, a circumpolar species, has been proposed as bioindicator for long term monitoring of heavy metals in the shallow waters of Antarctica due to its capacity to accumulate metals, especially cadmium and zinc. Like other Antarctic ectothermic organisms, L. elliptica changes its metabolism from aerobic to anaerobic as a function of temperature, being 6 ºC critical and 9 ºC lethal. This bivalve also shows a marked seasonality in its metabolism, with low oxygen consumption in winter as compared Text Antarc* Antarctic Antarctica Unknown Antarctic Austral The Antarctic |
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The Antarctic marine environment is characterized by the extreme seasonality of the primary production in the water column and the low but stable temperatures. Both are considered the main factors in the adaptative evolution of Antarctic ectothermic organisms. Studies about physiological and biochemical processes of the cold-adapted species revealed the presence of antifreeze glycoproteins in the biological fluids and cold-adapted proteins. The low and stable temperatures have resulted in the appearence of enzymes with high catalytic efficiency and the absence of the thermal stress proteins in some Antarctic fishes. The austral winter promotes a seasonal food shortage, submitting the benthic ectotherms to long periods of starvation. This is particularly true for the organisms that depend on phytoplankton as their primary source of food. The Antarctic marine environment also presents areas of high copper concentrations on the sediment surface as well as cadmium in the water column. The bivalve Laternula elliptica, a circumpolar species, has been proposed as bioindicator for long term monitoring of heavy metals in the shallow waters of Antarctica due to its capacity to accumulate metals, especially cadmium and zinc. Like other Antarctic ectothermic organisms, L. elliptica changes its metabolism from aerobic to anaerobic as a function of temperature, being 6 ºC critical and 9 ºC lethal. This bivalve also shows a marked seasonality in its metabolism, with low oxygen consumption in winter as compared |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Edson Rodrigues Gannabathula Sree Vani Helena Passeri Lavrado São Paulo Brasil Cep |
spellingShingle |
Edson Rodrigues Gannabathula Sree Vani Helena Passeri Lavrado São Paulo Brasil Cep 2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro |
author_facet |
Edson Rodrigues Gannabathula Sree Vani Helena Passeri Lavrado São Paulo Brasil Cep |
author_sort |
Edson Rodrigues |
title |
2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro |
title_short |
2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro |
title_full |
2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro |
title_fullStr |
2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro |
title_full_unstemmed |
2 Departamento de Biologia Marinha – Universidade Federal do Rio de Janeiro – UFRJ – CCS – bloco A –sala 089 – Ilha do Fundão, Rio de Janeiro |
title_sort |
2 departamento de biologia marinha – universidade federal do rio de janeiro – ufrj – ccs – bloco a –sala 089 – ilha do fundão, rio de janeiro |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.2491 http://www.oecologiaaustralis.org/ojs/index.php/oa/article/download/165/91/ |
geographic |
Antarctic Austral The Antarctic |
geographic_facet |
Antarctic Austral The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://www.oecologiaaustralis.org/ojs/index.php/oa/article/download/165/91/ |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.455.2491 http://www.oecologiaaustralis.org/ojs/index.php/oa/article/download/165/91/ |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766191005509353472 |