Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone
Hymenelia prevostii and H. coerulea are common endolithic lichen species on limestone outcrops in the eastern alpine mountains. We investigated their photosynthetic properties under controlled laboratory conditions and analyzed them with respect to relevant meso- and macroclimatic parameters to dete...
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Taylor & Francis
2007
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Online Access: | https://doi.org/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://unipub.uni-graz.at/doi/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://resolver.obvsg.at/urn:nbn:at:at-ubg:3-14088 |
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ftunivgraz:oai:unipub.uni-graz.at:7611406 2023-10-29T02:30:31+01:00 Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone Weber, Bettina Scherr, Claudia Reichenberger, Hans Büdel, Burkhard vls-obvugr-2710178 2007 text/html https://doi.org/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://unipub.uni-graz.at/doi/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://resolver.obvsg.at/urn:nbn:at:at-ubg:3-14088 eng eng Taylor & Francis vignette : https://unipub.uni-graz.at/titlepage/urn/urn:nbn:at:at-ubg:3-14088/128 vignette : https://unipub.uni-graz.at/titlepage/doi/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2/128 1938-4246 doi:10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://unipub.uni-graz.at/doi/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 urn:nbn:at:at-ubg:3-14088 https://resolver.obvsg.at/urn:nbn:at:at-ubg:3-14088 local:99146597422203331 system:AC16481670 Text Article 2007 ftunivgraz https://doi.org/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 2023-09-30T18:56:33Z Hymenelia prevostii and H. coerulea are common endolithic lichen species on limestone outcrops in the eastern alpine mountains. We investigated their photosynthetic properties under controlled laboratory conditions and analyzed them with respect to relevant meso- and macroclimatic parameters to determine specific adaptations to the extreme habitat. For the first time, it can be shown that endolithically living lichens are able to utilize water vapor alone to gain positive net photosynthesis (NP) rates. With respect to liquid water, both species reached optimum NP rates at low water content (H. prevostii: 0.26 mm, H. coerulea: 0.07 mm rainfall equivalent), and NP was increasingly depressed at water suprasaturation. In their preferred microhabitat on steep limestone outcrops in alpine regions, endolithic lichens avoid inundation over long time spans, but could perfectly utilize the high air humidity of monthly means between 60 and 80%. Due to light reduction by endolithic growth, both species revealed relatively high photosynthetic light compensation and saturation values, thus avoiding the high light intensities of the alpine habitat. Both lichen species were able to perform 90% of their optimal NP over a wide temperature range and still reached about one-third of their maximum NP rates at 2 °C, demonstrating their capability to cope with the large temperature changes occurring in their habitat. Version of record Article in Journal/Newspaper Antarc* Antarctic Arctic Graz University (UGR): Unipub |
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Open Polar |
collection |
Graz University (UGR): Unipub |
op_collection_id |
ftunivgraz |
language |
English |
description |
Hymenelia prevostii and H. coerulea are common endolithic lichen species on limestone outcrops in the eastern alpine mountains. We investigated their photosynthetic properties under controlled laboratory conditions and analyzed them with respect to relevant meso- and macroclimatic parameters to determine specific adaptations to the extreme habitat. For the first time, it can be shown that endolithically living lichens are able to utilize water vapor alone to gain positive net photosynthesis (NP) rates. With respect to liquid water, both species reached optimum NP rates at low water content (H. prevostii: 0.26 mm, H. coerulea: 0.07 mm rainfall equivalent), and NP was increasingly depressed at water suprasaturation. In their preferred microhabitat on steep limestone outcrops in alpine regions, endolithic lichens avoid inundation over long time spans, but could perfectly utilize the high air humidity of monthly means between 60 and 80%. Due to light reduction by endolithic growth, both species revealed relatively high photosynthetic light compensation and saturation values, thus avoiding the high light intensities of the alpine habitat. Both lichen species were able to perform 90% of their optimal NP over a wide temperature range and still reached about one-third of their maximum NP rates at 2 °C, demonstrating their capability to cope with the large temperature changes occurring in their habitat. Version of record |
format |
Article in Journal/Newspaper |
author |
Weber, Bettina Scherr, Claudia Reichenberger, Hans Büdel, Burkhard |
spellingShingle |
Weber, Bettina Scherr, Claudia Reichenberger, Hans Büdel, Burkhard Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone |
author_facet |
Weber, Bettina Scherr, Claudia Reichenberger, Hans Büdel, Burkhard |
author_sort |
Weber, Bettina |
title |
Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone |
title_short |
Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone |
title_full |
Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone |
title_fullStr |
Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone |
title_full_unstemmed |
Arctic, Antarctic, and Alpine Research / Fast Reactivation by High Air Humidity and Photosynthetic Performance of Alpine Lichens Growing Endolithically in Limestone |
title_sort |
arctic, antarctic, and alpine research / fast reactivation by high air humidity and photosynthetic performance of alpine lichens growing endolithically in limestone |
publisher |
Taylor & Francis |
publishDate |
2007 |
url |
https://doi.org/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://unipub.uni-graz.at/doi/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://resolver.obvsg.at/urn:nbn:at:at-ubg:3-14088 |
op_coverage |
vls-obvugr-2710178 |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_relation |
vignette : https://unipub.uni-graz.at/titlepage/urn/urn:nbn:at:at-ubg:3-14088/128 vignette : https://unipub.uni-graz.at/titlepage/doi/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2/128 1938-4246 doi:10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 https://unipub.uni-graz.at/doi/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 urn:nbn:at:at-ubg:3-14088 https://resolver.obvsg.at/urn:nbn:at:at-ubg:3-14088 local:99146597422203331 system:AC16481670 |
op_doi |
https://doi.org/10.1657/1523-0430(2007)39[309:FRBHAH]2.0.CO;2 |
_version_ |
1781059230548099072 |