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@article{1502276,
author = {Barták, Miloš and Mishra, Kumud Bandhu and Marečková, Michaela},
article_location = {Brno},
article_number = {2},
doi = {http://dx.doi.org/10.5817/CPR2018-2-21},
keywords = {desiccation; lichens; reflectance and water index; protection mechanisms; survival strategy},
language = {eng},
issn = {1805-0689},
journal = {Czech Polar Reports},
title = {Spectral reflectance indices sense desiccation induced changes in the thalli of Antarctic lichen Dermatocarpon polyphyllizum},
url = {http://www.sci.muni.cz/CPR/16cislo/Bartak_web.pdf},
volume = {8},
year = {2018}
}
TY - JOUR
ID - 1502276
AU - Barták, Miloš - Mishra, Kumud Bandhu - Marečková, Michaela
PY - 2018
TI - Spectral reflectance indices sense desiccation induced changes in the thalli of Antarctic lichen Dermatocarpon polyphyllizum
JF - Czech Polar Reports
VL - 8
IS - 2
SP - 249-259
EP - 249-259
PB - Masarykova univerzita
SN - 18050689
KW - desiccation
KW - lichens
KW - reflectance and water index
KW - protection mechanisms
KW - survival strategy
UR - http://www.sci.muni.cz/CPR/16cislo/Bartak_web.pdf
L2 - http://www.sci.muni.cz/CPR/16cislo/Bartak_web.pdf
N2 - Lichens, in polar and alpine regions, pass through repetitive dehydration and rehydration events over the years. The harsh environmental conditions affect the plasticity of lichen’s functional and structural features for their survival, in a species-specific way, and, thus, their optical and spectral characteristics. For an understanding on how dehydration affects lichens spectral reflectance, we measured visible (VIS) and near infrared (NIR) reflectance spectra of Dermatocarpon polyphyllizum, a foliose lichen species, from James Ross Island (Antarctica), during gradual dehydration from fully wet (relative water content (RWC) = 100%) to dry state (RWC = 0%), under laboratory conditions, and compared several derived reflectance indices (RIs) to RWC. We found a curvilinear relationship between RWC and range of RIs: water index (WI), photochemical reflectance index (PRI), normalized difference vegetation index (NDVI), modified chlorophyll absorption in reflectance indices (MCARI and MCARI1), simple ratio pigment index (SRPI), normalized pigment chlorophyll index (NPCI), and a new NIR shoulder region spectral ratio index (NSRI).
ER -
BARTÁK, Miloš, Kumud Bandhu MISHRA and Michaela MAREČKOVÁ. Spectral reflectance indices sense desiccation induced changes in the thalli of Antarctic lichen Dermatocarpon polyphyllizum. \textit{Czech Polar Reports}. Brno: Masarykova univerzita, 2018, vol.~8, No~2, p.~249-259. ISSN~1805-0689. Available from: https://dx.doi.org/10.5817/CPR2018-2-21.
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