Diurnal changes in photosynthetic activity of the biological
soil crust and lichen: Effects of abiotic factors
(Petuniabukta, Svalbard)

J 2014

Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)

SEHNAL, Luděk, Miloš BARTÁK a Peter VÁCZI

Základní údaje

Originální název

Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)

Název česky

Denní změny fotoszntetické aktivity biologické půdní krusty a lišejníku: Vliv abiotických faktorů (Zátoka Petunia, Špicberky)

Autoři

SEHNAL, Luděk (203 Česká republika, garant, domácí), Miloš BARTÁK (203 Česká republika, domácí) a Peter VÁCZI (703 Slovensko, domácí)

Vydání

Czech Polar Reports, Masarykova univerzita, 2014, 1805-0689

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10600 1.6 Biological sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

fulltext available here

Kód RIV

RIV/00216224:14310/14:00079515

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova česky

Špicberk; lišejník; biologická půdní krusta; photosyntéza; fluorescence; effektivní kvantový výtěžek; Cladonia rangiferina; Nostoc sp.

Klíčová slova anglicky

Spitsbergen; lichen; biological soil crusts; photosynthesis; fluorescence; effective quantum yield; Cladonia rangiferina; Nostoc sp.

Štítky

AKR, rivok

Příznaky

Recenzováno

Změněno: 28. 4. 2015 09:54, Ing. Andrea Mikešková

Anotace

ORIG CZ

V originále

In polar ecosystems, primary producers have to cope with a very harsh climate that limits the time available for growth and biomass production. In this study, diurnal measurement of photosynthetic processes in biological soil crust and a lichen were carried out in Petuniabukta, Spitsbergen. For field measurements, a method of induced fluorescence of chlorophyll was used. Measurements of photosynthetic activity were taken as repetitive measurements of effective quantum yield of photosystem II (PhiPSII). The short-term field measurements were carried out for 10 days in summer 2014. PhiPSII was recorded each 5 minutes as well as microclimatic data (air temperature, air humidity, photosynthetically active radiation - PAR). The microclimatic parameters were recorded by a datalogger. In general, physiological activity of both biological soil crust and a lichen showed daily courses. Tested lichen was Cladonia rangiferina and the most dominant species in biological soil crust was Nostoc sp. Typically, most of PhiPSII values ranged 0.6 – 0.7 in both model organisms. The results have shown that photosynthetic activity was strongly correlated with all observed abiotic factors in both study objects. Particularly important was the relation found between PAR and PhiPSII in biological soil crust. When the biological soil crust was exposed to high PAR doses of irradiation (about 2300 micromol m-2 s-1) photoinhibition of primary processes of photosynthesis was observed as PhiPSII decrease, while photosynthetic activity of lichen remained at same level. Furthermore, it has been demonstrated increasing that in situ photosynthetic activity increased in both biological soil crust and lichen with a decrease in temperature.

Česky

Byly sledovány primární fotoszntetické procesy biologické půdní krusy a lišejníku. Studie byla uskutečněna v terénu na Špicberkách.

Návaznosti

LM2010009, projekt VaV

Název: Projekt CzechPolar - České polární stanice: Stavba a operační náklady

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Czech Polar - České polární stanice: Stavba a operační náklady

Přiložené soubory

Sehnal-web.pdf

Vyhledat podobné dokumenty

Citovat

SEHNAL, Luděk, Miloš BARTÁK a Peter VÁCZI. Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard). Czech Polar Reports. Masarykova univerzita, 2014, roč. 4, č. 2, s. 158-167. ISSN 1805-0689.

@article{1230155,
   author = {Sehnal, Luděk and Barták, Miloš and Váczi, Peter},
   article_number = {2},
   keywords = {Spitsbergen; lichen; biological soil crusts; photosynthesis; fluorescence; effective quantum yield; Cladonia rangiferina; Nostoc sp.},
   language = {eng},
   issn = {1805-0689},
   journal = {Czech Polar Reports},
   title = {Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)},
   url = {http://www.sci.muni.cz/CPR/8cislo/Sehnal-web.pdf},
   volume = {4},
   year = {2014}
}

TY  - JOUR
ID  - 1230155
AU  - Sehnal, Luděk - Barták, Miloš - Váczi, Peter
PY  - 2014
TI  - Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard)
JF  - Czech Polar Reports
VL  - 4
IS  - 2
SP  - 158-167
EP  - 158-167
PB  - Masarykova univerzita
SN  - 18050689
KW  - Spitsbergen
KW  - lichen
KW  - biological soil crusts
KW  - photosynthesis
KW  - fluorescence
KW  - effective quantum yield
KW  - Cladonia rangiferina
KW  - Nostoc sp.
UR  - http://www.sci.muni.cz/CPR/8cislo/Sehnal-web.pdf
L2  - http://www.sci.muni.cz/CPR/8cislo/Sehnal-web.pdf
N2  - In polar ecosystems, primary producers have to cope with a very harsh climate that limits the time available for growth and biomass production. In this study, diurnal measurement of photosynthetic processes in biological soil crust and a lichen were carried out in Petuniabukta, Spitsbergen. For field measurements, a method of induced fluorescence of chlorophyll was used. Measurements of photosynthetic activity were taken as repetitive measurements of effective quantum yield of photosystem II (PhiPSII). The short-term field measurements were carried out for 10 days in summer 2014. PhiPSII was recorded each 5 minutes as well as microclimatic data (air temperature, air humidity, photosynthetically active radiation - PAR). The microclimatic parameters were recorded by a datalogger. In general, physiological activity of both biological soil crust and a lichen showed daily courses. Tested lichen was Cladonia rangiferina and the most dominant species in biological soil crust was Nostoc sp. Typically, most of PhiPSII values ranged 0.6 – 0.7 in both model organisms. The results have shown that photosynthetic activity was strongly correlated with all observed abiotic factors in both study objects. Particularly important was the relation found between PAR and PhiPSII in biological soil crust. When the biological soil crust was exposed to high PAR doses of irradiation (about 2300 micromol m-2 s-1) photoinhibition of primary processes of photosynthesis was observed as PhiPSII decrease, while photosynthetic activity of lichen remained at same level. Furthermore, it has been demonstrated increasing that in situ photosynthetic activity increased in both biological soil crust and lichen with a decrease in temperature.
ER  -

SEHNAL, Luděk, Miloš BARTÁK a Peter VÁCZI. Diurnal changes in photosynthetic activity of the biological soil crust and lichen: Effects of abiotic factors (Petuniabukta, Svalbard). \textit{Czech Polar Reports}. Masarykova univerzita, 2014, roč.~4, č.~2, s.~158-167. ISSN~1805-0689.

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