Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity
Although an extensive professional literature exists on biological soil crusts (BSCs), especially on the species composition of hetero- and autotrophs forming the micro-biological comunity, micromorphological information on BSCs is extremely scarce. In our study, we focused on microstructure of the...
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ftmasarykunivojs:oai:ojs.journals.muni.cz:article/13068 2023-05-15T13:46:41+02:00 Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity Trnková, Kateřina Tschense, Nele 2019-06-01 application/pdf http://journals.muni.cz/CPR/article/view/13068 eng eng Masaryk Univerzity http://journals.muni.cz/CPR/article/view/13068/11326 http://journals.muni.cz/CPR/article/view/13068 Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 CC-BY-NC-ND Czech Polar Reports; Vol 9 No 2 (2019); 243-250 Czech Polar Reports; Vol. 9 No. 2 (2019); 243-250 1805-0697 1805-0689 surface roughness 3-D digital microscopy cyanobacteria ecophysiology UV-B info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftmasarykunivojs 2022-06-26T10:16:45Z Although an extensive professional literature exists on biological soil crusts (BSCs), especially on the species composition of hetero- and autotrophs forming the micro-biological comunity, micromorphological information on BSCs is extremely scarce. In our study, we focused on microstructure of the BSCs from the James Ross Island (Antarctica). We combined the approach of digital microscopy to study surface roughness of the BSCs with taxonomy of BSC-forming autotrophs and chlorophyll fluorescence study focused on the photosynthetic functioning of BSCs when exposed to controlled UV-B stress. Microprofiling of BSCs resulted in the finding that the examined BSCs might be classified as fine-grained surface with roughness characteristics: Ra (37.9 μm) and Rz (136.9 μm). The BSCs were rich in microautotrophs, both algae and cyanobacteria, however, Microcoleus sp. was found dominating species. It formed multifilament ropes on and inside the BSCs. Under UV-B stress, Microcoleus- and Nostoc-dominated BSC parts showed similar sensitivity and acclimatory response so long-term UV-B treatment, however, Microcoleus seemed to be slightly more sensitive to UV-B. Microcoleus-dominated parts of BSCs showed less pronounced acclimation to UV-B treatment than Nostoc-dominated parts. It was reflected in lower values of maximum (FV/FM) and effective (FPSII) quantum yields recorded after 6 d exposition. Article in Journal/Newspaper Antarc* Antarctica James Ross Island Ross Island Masaryk University Journals Ross Island |
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Open Polar |
collection |
Masaryk University Journals |
op_collection_id |
ftmasarykunivojs |
language |
English |
topic |
surface roughness 3-D digital microscopy cyanobacteria ecophysiology UV-B |
spellingShingle |
surface roughness 3-D digital microscopy cyanobacteria ecophysiology UV-B Trnková, Kateřina Tschense, Nele Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity |
topic_facet |
surface roughness 3-D digital microscopy cyanobacteria ecophysiology UV-B |
description |
Although an extensive professional literature exists on biological soil crusts (BSCs), especially on the species composition of hetero- and autotrophs forming the micro-biological comunity, micromorphological information on BSCs is extremely scarce. In our study, we focused on microstructure of the BSCs from the James Ross Island (Antarctica). We combined the approach of digital microscopy to study surface roughness of the BSCs with taxonomy of BSC-forming autotrophs and chlorophyll fluorescence study focused on the photosynthetic functioning of BSCs when exposed to controlled UV-B stress. Microprofiling of BSCs resulted in the finding that the examined BSCs might be classified as fine-grained surface with roughness characteristics: Ra (37.9 μm) and Rz (136.9 μm). The BSCs were rich in microautotrophs, both algae and cyanobacteria, however, Microcoleus sp. was found dominating species. It formed multifilament ropes on and inside the BSCs. Under UV-B stress, Microcoleus- and Nostoc-dominated BSC parts showed similar sensitivity and acclimatory response so long-term UV-B treatment, however, Microcoleus seemed to be slightly more sensitive to UV-B. Microcoleus-dominated parts of BSCs showed less pronounced acclimation to UV-B treatment than Nostoc-dominated parts. It was reflected in lower values of maximum (FV/FM) and effective (FPSII) quantum yields recorded after 6 d exposition. |
format |
Article in Journal/Newspaper |
author |
Trnková, Kateřina Tschense, Nele |
author_facet |
Trnková, Kateřina Tschense, Nele |
author_sort |
Trnková, Kateřina |
title |
Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity |
title_short |
Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity |
title_full |
Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity |
title_fullStr |
Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity |
title_full_unstemmed |
Structure and function of biological soil crusts from Antarctica with a special respect to their microtopography and UV-B sensitivity |
title_sort |
structure and function of biological soil crusts from antarctica with a special respect to their microtopography and uv-b sensitivity |
publisher |
Masaryk Univerzity |
publishDate |
2019 |
url |
http://journals.muni.cz/CPR/article/view/13068 |
geographic |
Ross Island |
geographic_facet |
Ross Island |
genre |
Antarc* Antarctica James Ross Island Ross Island |
genre_facet |
Antarc* Antarctica James Ross Island Ross Island |
op_source |
Czech Polar Reports; Vol 9 No 2 (2019); 243-250 Czech Polar Reports; Vol. 9 No. 2 (2019); 243-250 1805-0697 1805-0689 |
op_relation |
http://journals.muni.cz/CPR/article/view/13068/11326 http://journals.muni.cz/CPR/article/view/13068 |
op_rights |
Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766245084908486656 |