EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology)
Microbial mats dominated by cyanobactena are the most abundant living forms in non-oceanic Antarctic ecosystems. The ultraviolet radiation increase may affect drastically the organisms living in the polar regions and especially those of terrestrial ecosystems exposed to full sunshine. The aim of thi...
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ftnipr:oai:nipr.repo.nii.ac.jp:00005368 2023-05-15T13:46:39+02:00 EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology) Antonio QUESADA Lynda GOFF Deneb KARENTZ 1998-02 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5368 http://id.nii.ac.jp/1291/00005368/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5368&item_no=1&attribute_id=18&file_no=1 en eng Proceeding Departamento de Biologia, Umversidad Autonoma de Madrid Department of Biology, University of California Department of Biology, University oj San Francisco National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5368 http://id.nii.ac.jp/1291/00005368/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 11, 98-111(1998-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5368&item_no=1&attribute_id=18&file_no=1 Antarctica cyanobacteria McMurdo Sound mycosporine-hke-aminoacids UVB Departmental Bulletin Paper P(論文) 1998 ftnipr 2023-02-25T20:13:31Z Microbial mats dominated by cyanobactena are the most abundant living forms in non-oceanic Antarctic ecosystems. The ultraviolet radiation increase may affect drastically the organisms living in the polar regions and especially those of terrestrial ecosystems exposed to full sunshine. The aim of this work was to investigate the effect of UV radiation on terrestrial Antarctic communities. Dominant species in these microbial assemblages belonged to the filamentous, non-heterocystous cyanobactena group (e g Phormidium, Lyngbya, Oscillatona, etc). Heterocystous (e g Nodular 10) and coccoid (e g Synechococcus) cyanobactena were subdommant although very abundant. We studied the effect of natural UV radiation on cyanobactenal mats, using a series of narrow band UV filters After two weeks of differential exposure to UV (PAR, PAR + UVA, PAR + UVB, PAR + UVA + UVB) population structure, pigment composition and physiological activities were analyzed. Although statistical analyses revealed that mats under the four UV regimes assayed were not significantly different in community structure nor in pigment composition, surface appearance of mats was different between treatments. Physiological analyses indicated that the photosynthesis/respiration balance might be affected by UV radiation. The apparent contradiction between analytical data of pigments and surface appearance can be explained by considering that UV regime might have induced changes in the position of the microrgamsms of the mat by mean of migration. This process is suggested to be one of the responses of escaping from an increasing UVB radiation environment. Report Antarc* Antarctic Antarctica McMurdo Sound Polar Biology Proceedings of the NIPR Symposium on Polar Biology National Institute of Polar Research Repository, Japan Antarctic McMurdo Sound |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Antarctica cyanobacteria McMurdo Sound mycosporine-hke-aminoacids UVB |
spellingShingle |
Antarctica cyanobacteria McMurdo Sound mycosporine-hke-aminoacids UVB Antonio QUESADA Lynda GOFF Deneb KARENTZ EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology) |
topic_facet |
Antarctica cyanobacteria McMurdo Sound mycosporine-hke-aminoacids UVB |
description |
Microbial mats dominated by cyanobactena are the most abundant living forms in non-oceanic Antarctic ecosystems. The ultraviolet radiation increase may affect drastically the organisms living in the polar regions and especially those of terrestrial ecosystems exposed to full sunshine. The aim of this work was to investigate the effect of UV radiation on terrestrial Antarctic communities. Dominant species in these microbial assemblages belonged to the filamentous, non-heterocystous cyanobactena group (e g Phormidium, Lyngbya, Oscillatona, etc). Heterocystous (e g Nodular 10) and coccoid (e g Synechococcus) cyanobactena were subdommant although very abundant. We studied the effect of natural UV radiation on cyanobactenal mats, using a series of narrow band UV filters After two weeks of differential exposure to UV (PAR, PAR + UVA, PAR + UVB, PAR + UVA + UVB) population structure, pigment composition and physiological activities were analyzed. Although statistical analyses revealed that mats under the four UV regimes assayed were not significantly different in community structure nor in pigment composition, surface appearance of mats was different between treatments. Physiological analyses indicated that the photosynthesis/respiration balance might be affected by UV radiation. The apparent contradiction between analytical data of pigments and surface appearance can be explained by considering that UV regime might have induced changes in the position of the microrgamsms of the mat by mean of migration. This process is suggested to be one of the responses of escaping from an increasing UVB radiation environment. |
format |
Report |
author |
Antonio QUESADA Lynda GOFF Deneb KARENTZ |
author_facet |
Antonio QUESADA Lynda GOFF Deneb KARENTZ |
author_sort |
Antonio QUESADA |
title |
EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology) |
title_short |
EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology) |
title_full |
EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology) |
title_fullStr |
EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology) |
title_full_unstemmed |
EFFECTS OF NATURAL UV RADIATION ON ANTARCTIC CYANOBACTERIAL MATS (19th Symposium on Polar Biology) |
title_sort |
effects of natural uv radiation on antarctic cyanobacterial mats (19th symposium on polar biology) |
publisher |
Proceeding |
publishDate |
1998 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5368 http://id.nii.ac.jp/1291/00005368/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5368&item_no=1&attribute_id=18&file_no=1 |
geographic |
Antarctic McMurdo Sound |
geographic_facet |
Antarctic McMurdo Sound |
genre |
Antarc* Antarctic Antarctica McMurdo Sound Polar Biology Proceedings of the NIPR Symposium on Polar Biology |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Sound Polar Biology Proceedings of the NIPR Symposium on Polar Biology |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=5368 http://id.nii.ac.jp/1291/00005368/ AA10819561 Proceedings of the NIPR Symposium on Polar Biology, 11, 98-111(1998-02) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5368&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766244976009674752 |