The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration
In maritime Antarctica, lichens and mosses represent dominant autotrophs forming community structure of vegetation oases. In our study, we selected 4 most common lichen species (Xanthoria elegans, Rhizoplaca melanophthalma, Leptogium puberulum, Physconia muscigena) and monospecific colony of Nostoc...
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ftmasarykunivojs:oai:ojs.journals.muni.cz:article/12919 2023-05-15T13:46:41+02:00 The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration Orekhova, Alla Marečková, Michaela Hazdrová, Jana Barták, Miloš 2018-01-01 application/pdf http://journals.muni.cz/CPR/article/view/12919 eng eng Masaryk Univerzity http://journals.muni.cz/CPR/article/view/12919/11271 http://journals.muni.cz/CPR/article/view/12919 Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 CC-BY-NC-ND Czech Polar Reports; Vol 8 No 1 (2018); 107-118 Czech Polar Reports; Vol. 8 No. 1 (2018); 107-118 1805-0697 1805-0689 PRI NDVI cyanolichens chlorolichens Nostoc commune info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftmasarykunivojs 2022-06-26T10:16:39Z In maritime Antarctica, lichens and mosses represent dominant autotrophs forming community structure of vegetation oases. In our study, we selected 4 most common lichen species (Xanthoria elegans, Rhizoplaca melanophthalma, Leptogium puberulum, Physconia muscigena) and monospecific colony of Nostoc commune typical for James Ross Island (Antarctica) for detailed physiological experiments. We investigated their spectral characteristics in response to hydration status of their thalli. In samples desiccating from fully wet (RWC, relative water content of 100%) to dry state (RWC = 0), photochemical reflectance index (PRI), and normalized difference vegetation index (NDVI) were evaluated for control thalli and those with removed upper cortex. In this way, the effect of presence/absence of the upper cortex on PRI, NDVI was studied. PRI showed either no change or species-specific an increase/decrease with dehydration. Removal of the upper cortex caused both PRI decrease (N. commune, P. muscigena) and increase (R. melanophthalma, L. puberulum). Removal of the upper cortex led to increase in NDVI in all species, typically within the RWC range of 20-100%. Species-specific differences of hydration-response curves of PRI and NDVI are discussed as well as the role of the absence of the upper cortex in the evaluation of spectral characteristics in desiccating lichens. Article in Journal/Newspaper Antarc* Antarctic Antarctica James Ross Island Ross Island Masaryk University Journals Antarctic Ross Island |
institution |
Open Polar |
collection |
Masaryk University Journals |
op_collection_id |
ftmasarykunivojs |
language |
English |
topic |
PRI NDVI cyanolichens chlorolichens Nostoc commune |
spellingShingle |
PRI NDVI cyanolichens chlorolichens Nostoc commune Orekhova, Alla Marečková, Michaela Hazdrová, Jana Barták, Miloš The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration |
topic_facet |
PRI NDVI cyanolichens chlorolichens Nostoc commune |
description |
In maritime Antarctica, lichens and mosses represent dominant autotrophs forming community structure of vegetation oases. In our study, we selected 4 most common lichen species (Xanthoria elegans, Rhizoplaca melanophthalma, Leptogium puberulum, Physconia muscigena) and monospecific colony of Nostoc commune typical for James Ross Island (Antarctica) for detailed physiological experiments. We investigated their spectral characteristics in response to hydration status of their thalli. In samples desiccating from fully wet (RWC, relative water content of 100%) to dry state (RWC = 0), photochemical reflectance index (PRI), and normalized difference vegetation index (NDVI) were evaluated for control thalli and those with removed upper cortex. In this way, the effect of presence/absence of the upper cortex on PRI, NDVI was studied. PRI showed either no change or species-specific an increase/decrease with dehydration. Removal of the upper cortex caused both PRI decrease (N. commune, P. muscigena) and increase (R. melanophthalma, L. puberulum). Removal of the upper cortex led to increase in NDVI in all species, typically within the RWC range of 20-100%. Species-specific differences of hydration-response curves of PRI and NDVI are discussed as well as the role of the absence of the upper cortex in the evaluation of spectral characteristics in desiccating lichens. |
format |
Article in Journal/Newspaper |
author |
Orekhova, Alla Marečková, Michaela Hazdrová, Jana Barták, Miloš |
author_facet |
Orekhova, Alla Marečková, Michaela Hazdrová, Jana Barták, Miloš |
author_sort |
Orekhova, Alla |
title |
The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration |
title_short |
The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration |
title_full |
The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration |
title_fullStr |
The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration |
title_full_unstemmed |
The effect of upper cortex absence on spectral reflectance indices in Antarctic lichens during thallus dehydration |
title_sort |
effect of upper cortex absence on spectral reflectance indices in antarctic lichens during thallus dehydration |
publisher |
Masaryk Univerzity |
publishDate |
2018 |
url |
http://journals.muni.cz/CPR/article/view/12919 |
geographic |
Antarctic Ross Island |
geographic_facet |
Antarctic Ross Island |
genre |
Antarc* Antarctic Antarctica James Ross Island Ross Island |
genre_facet |
Antarc* Antarctic Antarctica James Ross Island Ross Island |
op_source |
Czech Polar Reports; Vol 8 No 1 (2018); 107-118 Czech Polar Reports; Vol. 8 No. 1 (2018); 107-118 1805-0697 1805-0689 |
op_relation |
http://journals.muni.cz/CPR/article/view/12919/11271 http://journals.muni.cz/CPR/article/view/12919 |
op_rights |
Copyright (c) 2020 Czech Polar Reports https://creativecommons.org/licenses/by-nc-nd/4.0 |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766245078897000448 |