Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina
The daily, in situ gross photosynthetic patterns of Cladonia stellaris (Opiz.) Pouz. & Vězda. and Cladonia rangiferina (L.) Wigg. were monitored during portions of the 1977, 1978, and 1979 growing seasons at Anaktuvuk Pass, Alaska. Photosynthetic activity in both species closely paralleled atmos...
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Language: | English |
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Canadian Science Publishing
1983
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Online Access: | http://dx.doi.org/10.1139/b83-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/b83-073 |
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crcansciencepubl:10.1139/b83-073 2024-06-23T07:52:10+00:00 Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina Moser, Thomas J. Nash III, Thomas H. Link, Steven O. 1983 http://dx.doi.org/10.1139/b83-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/b83-073 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Botany volume 61, issue 3, page 642-655 ISSN 0008-4026 journal-article 1983 crcansciencepubl https://doi.org/10.1139/b83-073 2024-06-13T04:10:51Z The daily, in situ gross photosynthetic patterns of Cladonia stellaris (Opiz.) Pouz. & Vězda. and Cladonia rangiferina (L.) Wigg. were monitored during portions of the 1977, 1978, and 1979 growing seasons at Anaktuvuk Pass, Alaska. Photosynthetic activity in both species closely paralleled atmospheric moisture status, where peak photosynthetic rates were attained during or following sporadic summer rain. In addition, thallus absorption of moisture during extended periods of high atmospheric water vapor content gave rise to short periods of minimal photosynthetic activity. During late evening and early morning hours moistened thalli exhibited minimal or no photosynthetic activity, coinciding with consistent attenuation in solar radiation during these periods. Photosynthetic activity was not homogeneous throughout the thallus. The greatest activity occurred in the apical regions and decreased progressively into the basal regions. The apical 10-mm regions of C. stellaris and C. rangiferina thalli accounted for approximately 50% of their photosynthetic capabilities. The potential gross CO 2 assimilation of the apical 10-mm regions over 72 days of the 1978 growing season was estimated at approximately 35 g CO 2 ∙m −2 and 16 g CO 2 ∙m −2 for C. stellaris and C. rangiferina, respectively. Article in Journal/Newspaper Cladonia rangiferina Alaska Canadian Science Publishing Canadian Journal of Botany 61 3 642 655 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The daily, in situ gross photosynthetic patterns of Cladonia stellaris (Opiz.) Pouz. & Vězda. and Cladonia rangiferina (L.) Wigg. were monitored during portions of the 1977, 1978, and 1979 growing seasons at Anaktuvuk Pass, Alaska. Photosynthetic activity in both species closely paralleled atmospheric moisture status, where peak photosynthetic rates were attained during or following sporadic summer rain. In addition, thallus absorption of moisture during extended periods of high atmospheric water vapor content gave rise to short periods of minimal photosynthetic activity. During late evening and early morning hours moistened thalli exhibited minimal or no photosynthetic activity, coinciding with consistent attenuation in solar radiation during these periods. Photosynthetic activity was not homogeneous throughout the thallus. The greatest activity occurred in the apical regions and decreased progressively into the basal regions. The apical 10-mm regions of C. stellaris and C. rangiferina thalli accounted for approximately 50% of their photosynthetic capabilities. The potential gross CO 2 assimilation of the apical 10-mm regions over 72 days of the 1978 growing season was estimated at approximately 35 g CO 2 ∙m −2 and 16 g CO 2 ∙m −2 for C. stellaris and C. rangiferina, respectively. |
format |
Article in Journal/Newspaper |
author |
Moser, Thomas J. Nash III, Thomas H. Link, Steven O. |
spellingShingle |
Moser, Thomas J. Nash III, Thomas H. Link, Steven O. Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina |
author_facet |
Moser, Thomas J. Nash III, Thomas H. Link, Steven O. |
author_sort |
Moser, Thomas J. |
title |
Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina |
title_short |
Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina |
title_full |
Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina |
title_fullStr |
Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina |
title_full_unstemmed |
Diurnal gross photosynthetic patterns and potential seasonal CO 2 assimilation in Cladonia stellaris and Cladonia rangiferina |
title_sort |
diurnal gross photosynthetic patterns and potential seasonal co 2 assimilation in cladonia stellaris and cladonia rangiferina |
publisher |
Canadian Science Publishing |
publishDate |
1983 |
url |
http://dx.doi.org/10.1139/b83-073 http://www.nrcresearchpress.com/doi/pdf/10.1139/b83-073 |
genre |
Cladonia rangiferina Alaska |
genre_facet |
Cladonia rangiferina Alaska |
op_source |
Canadian Journal of Botany volume 61, issue 3, page 642-655 ISSN 0008-4026 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/b83-073 |
container_title |
Canadian Journal of Botany |
container_volume |
61 |
container_issue |
3 |
container_start_page |
642 |
op_container_end_page |
655 |
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1802643411375751168 |