Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula
Cryptogamic vegetation dominates the ice-free areas of the maritime Antarctic. This particular flora grows slowly due to extreme environmental conditions, typically low temperature that may limit growth during a short summer. Over the last 50 years, the Antarctic Peninsula has undergone the highest...
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Online Access: | http://dx.doi.org/10.5817/cpr2015-1-9 https://journals.muni.cz/CPR/article/viewFile/12869/11203 |
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crmasarykunivpr:10.5817/cpr2015-1-9 2024-05-19T07:31:08+00:00 Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula Casanova-Katny, Angélica Pizarro, Marisol Caballero, Marta María Cordero, Raúl Zúiga, Gustavo E. 2015 http://dx.doi.org/10.5817/cpr2015-1-9 https://journals.muni.cz/CPR/article/viewFile/12869/11203 unknown Masaryk University Press http://creativecommons.org/licenses/by-nc-nd/4.0 Czech Polar Reports volume 5, issue 1, page 88-98 ISSN 1805-0697 1805-0689 journal-article 2015 crmasarykunivpr https://doi.org/10.5817/cpr2015-1-9 2024-04-30T06:41:27Z Cryptogamic vegetation dominates the ice-free areas of the maritime Antarctic. This particular flora grows slowly due to extreme environmental conditions, typically low temperature that may limit growth during a short summer. Over the last 50 years, the Antarctic Peninsula has undergone the highest registered temperature increases in Antarctica. As a consequence of higher temperatures, we hypothesized that lichens and mosses would produce more carbohydrates. To test this, open top chambers (OTCs) were installed in an Usnea-Himantormia community on Fildes Peninsula of King George Island. After two years, lichen thalli and plant tissues were collected to quantify non-structural carbohydrates in three lichens and two mosses. Responses contrasted between species. While non-structural carbohydrates were higher in the OTC for the lichen Himantormia lugubris, the values decreased in the moss Polytrichastrum alpinum. No marked responses to experimental warming were observed in the other three species. A significant species-specific increase in soluble sugar was observed inside the OTCs, while polyols content were not markedly different due to OTC treatment. In general, the obtained results indicate that warming does not increase carbohydrate content in all cryptogams, instead suggesting a strong species-specific response to a scenario of global warming. Further long-term warming experiments are needed to assess the responses of target species in the terrestrial Antarctic ecosystem. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica King George Island Munipress - Masaryk University Press Czech Polar Reports 5 1 88 98 |
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Munipress - Masaryk University Press |
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crmasarykunivpr |
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description |
Cryptogamic vegetation dominates the ice-free areas of the maritime Antarctic. This particular flora grows slowly due to extreme environmental conditions, typically low temperature that may limit growth during a short summer. Over the last 50 years, the Antarctic Peninsula has undergone the highest registered temperature increases in Antarctica. As a consequence of higher temperatures, we hypothesized that lichens and mosses would produce more carbohydrates. To test this, open top chambers (OTCs) were installed in an Usnea-Himantormia community on Fildes Peninsula of King George Island. After two years, lichen thalli and plant tissues were collected to quantify non-structural carbohydrates in three lichens and two mosses. Responses contrasted between species. While non-structural carbohydrates were higher in the OTC for the lichen Himantormia lugubris, the values decreased in the moss Polytrichastrum alpinum. No marked responses to experimental warming were observed in the other three species. A significant species-specific increase in soluble sugar was observed inside the OTCs, while polyols content were not markedly different due to OTC treatment. In general, the obtained results indicate that warming does not increase carbohydrate content in all cryptogams, instead suggesting a strong species-specific response to a scenario of global warming. Further long-term warming experiments are needed to assess the responses of target species in the terrestrial Antarctic ecosystem. |
format |
Article in Journal/Newspaper |
author |
Casanova-Katny, Angélica Pizarro, Marisol Caballero, Marta María Cordero, Raúl Zúiga, Gustavo E. |
spellingShingle |
Casanova-Katny, Angélica Pizarro, Marisol Caballero, Marta María Cordero, Raúl Zúiga, Gustavo E. Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula |
author_facet |
Casanova-Katny, Angélica Pizarro, Marisol Caballero, Marta María Cordero, Raúl Zúiga, Gustavo E. |
author_sort |
Casanova-Katny, Angélica |
title |
Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula |
title_short |
Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula |
title_full |
Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula |
title_fullStr |
Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula |
title_full_unstemmed |
Non-structural carbohydrate content in cryptogamic Antarctic species after two years of passive warming on the Fildes Peninsula |
title_sort |
non-structural carbohydrate content in cryptogamic antarctic species after two years of passive warming on the fildes peninsula |
publisher |
Masaryk University Press |
publishDate |
2015 |
url |
http://dx.doi.org/10.5817/cpr2015-1-9 https://journals.muni.cz/CPR/article/viewFile/12869/11203 |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica King George Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica King George Island |
op_source |
Czech Polar Reports volume 5, issue 1, page 88-98 ISSN 1805-0697 1805-0689 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0 |
op_doi |
https://doi.org/10.5817/cpr2015-1-9 |
container_title |
Czech Polar Reports |
container_volume |
5 |
container_issue |
1 |
container_start_page |
88 |
op_container_end_page |
98 |
_version_ |
1799468981525938176 |