Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ...
Water availability and low temperatures are believed to be the main ecological limits for continental Antarctic lichens. Lichen growth may also be limited by nitrogen availability. Thallus nitrogen content of two dominant Antarctic macro lichens decreases significantly at the onset of the summer sno...
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University Of Tasmania
2023
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ftdatacite:10.25959/23243606.v1 2023-06-11T04:07:02+02:00 Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ... O'Brien, MM 2023 https://dx.doi.org/10.25959/23243606.v1 https://figshare.utas.edu.au/articles/thesis/Impacts_of_increased_water_and_nitrogen_availability_on_photosynthesis_of_the_continental_Antarctic_lichen_Usnea_sphacelata/23243606/1 unknown University Of Tasmania https://dx.doi.org/10.25959/23243606 In Copyright http://rightsstatements.org/vocab/InC/1.0/ article-journal Text ScholarlyArticle Thesis 2023 ftdatacite https://doi.org/10.25959/23243606.v110.25959/23243606 2023-06-01T12:12:28Z Water availability and low temperatures are believed to be the main ecological limits for continental Antarctic lichens. Lichen growth may also be limited by nitrogen availability. Thallus nitrogen content of two dominant Antarctic macro lichens decreases significantly at the onset of the summer snow melt, but the causes are unknown. Over the past 40 years precipitation rates have increased in the Windmill Islands region of continental Antarctica. An increase in snow fall may result in lichens being wet for longer periods during the summer, which may result in an increase in photosynthetic activity. Should lichen growth be limited by nitrogen availability, however, increases in growth due to increased precipitation may increase the demand for nitrogen beyond supply. Consequently, this may affect long term lichen survival. Usnea sphacelata is the dominant terrestrial macrolichen of continental Antarctica. In order to examine the impact of increased precipitation, in situ stands of U sphacelata at two sites ... Thesis Antarc* Antarctic Antarctica Windmill Islands DataCite Metadata Store (German National Library of Science and Technology) Antarctic Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
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description |
Water availability and low temperatures are believed to be the main ecological limits for continental Antarctic lichens. Lichen growth may also be limited by nitrogen availability. Thallus nitrogen content of two dominant Antarctic macro lichens decreases significantly at the onset of the summer snow melt, but the causes are unknown. Over the past 40 years precipitation rates have increased in the Windmill Islands region of continental Antarctica. An increase in snow fall may result in lichens being wet for longer periods during the summer, which may result in an increase in photosynthetic activity. Should lichen growth be limited by nitrogen availability, however, increases in growth due to increased precipitation may increase the demand for nitrogen beyond supply. Consequently, this may affect long term lichen survival. Usnea sphacelata is the dominant terrestrial macrolichen of continental Antarctica. In order to examine the impact of increased precipitation, in situ stands of U sphacelata at two sites ... |
format |
Thesis |
author |
O'Brien, MM |
spellingShingle |
O'Brien, MM Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ... |
author_facet |
O'Brien, MM |
author_sort |
O'Brien, MM |
title |
Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ... |
title_short |
Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ... |
title_full |
Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ... |
title_fullStr |
Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ... |
title_full_unstemmed |
Impacts of increased water and nitrogen availability on photosynthesis of the continental Antarctic lichen Usnea sphacelata ... |
title_sort |
impacts of increased water and nitrogen availability on photosynthesis of the continental antarctic lichen usnea sphacelata ... |
publisher |
University Of Tasmania |
publishDate |
2023 |
url |
https://dx.doi.org/10.25959/23243606.v1 https://figshare.utas.edu.au/articles/thesis/Impacts_of_increased_water_and_nitrogen_availability_on_photosynthesis_of_the_continental_Antarctic_lichen_Usnea_sphacelata/23243606/1 |
long_lat |
ENVELOPE(110.417,110.417,-66.350,-66.350) |
geographic |
Antarctic Windmill Islands |
geographic_facet |
Antarctic Windmill Islands |
genre |
Antarc* Antarctic Antarctica Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctica Windmill Islands |
op_relation |
https://dx.doi.org/10.25959/23243606 |
op_rights |
In Copyright http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.25959/23243606.v110.25959/23243606 |
_version_ |
1768379525130878976 |