Effect of freezing on seaweed photosynthesis
The effect of freezing on photosynthesis was studied in a variety of brown and red seaweeds from the Gulf of Maine, USA. Photosynthesis in sublittoral fringe and rock pool species was adversely affected by a single 6 or 12h exposure to - 20??C even after a 7 d recovery period in sea water at 5??C, w...
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1989
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ftcalifstateuniv:oai:dspace.calstate.edu:10211.2/2810 2023-05-15T15:13:49+02:00 Effect of freezing on seaweed photosynthesis Davison, Ian R. Dudgeon, Steven R. Ruan, Hang-Ming 1989 http://hdl.handle.net/10211.2/2810 en eng Marine Ecology Progress Series doi.org/10.3354/meps058123 Marine Ecology Progress Series 58, 123-131. (1989) 0171-8630 http://hdl.handle.net/10211.2/2810 Copyright 1989 Inter-Research Science Center Photosynthesis Research Seaweed Article 1989 ftcalifstateuniv https://doi.org/10.3354/meps058123 2022-04-13T11:08:01Z The effect of freezing on photosynthesis was studied in a variety of brown and red seaweeds from the Gulf of Maine, USA. Photosynthesis in sublittoral fringe and rock pool species was adversely affected by a single 6 or 12h exposure to - 20??C even after a 7 d recovery period in sea water at 5??C, whereas most intertidal forms were unaffected by this treatment. Three h at -20??C resulted in an immediate reduction in photosynthesis of most intertidal seaweeds, with the degree of inhibition corresponding to zonation on the shore. For example, photosynthesis in the upper shore fucoid Fucus spiralis was unaffected by 3 h at - 20??C, whereas that of the low-intertidal Fucus edentatus was reduced by 97%. The percentage of frozen tissue water after 3 h at - 20??C was similar in all species, suggesting that differences in susceptibility to freezing are attributable to physiological tolerance rather than avoidance. Freezing intolerant species exhibited massive amino acid release on re-immersion in sea water following freezing. In contrast, amino acid release was much lower in freezing tolerant species. The release of amino acids is believed to be due to loss of plasmalemma integrity, suggesting that the freezing tolerance of seaweeds may be controlled by the plasmalemma. Overall, the results of this study suggest that freezing may play an important role in structuring sub-arctic and boreal intertidal communities. Freezing can operate in 2 ways: (1) as a disturbance excluding sub-littoral and rock pool species from the eulittoral and (2) as a physiological stress affecting relative competitive abilities of eulittoral forms via differential reduction in photosynthesis and hence growth. Article in Journal/Newspaper Arctic California State University (CSU): DSpace Arctic Marine Ecology Progress Series 58 123 131 |
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Open Polar |
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California State University (CSU): DSpace |
op_collection_id |
ftcalifstateuniv |
language |
English |
topic |
Photosynthesis Research Seaweed |
spellingShingle |
Photosynthesis Research Seaweed Davison, Ian R. Dudgeon, Steven R. Ruan, Hang-Ming Effect of freezing on seaweed photosynthesis |
topic_facet |
Photosynthesis Research Seaweed |
description |
The effect of freezing on photosynthesis was studied in a variety of brown and red seaweeds from the Gulf of Maine, USA. Photosynthesis in sublittoral fringe and rock pool species was adversely affected by a single 6 or 12h exposure to - 20??C even after a 7 d recovery period in sea water at 5??C, whereas most intertidal forms were unaffected by this treatment. Three h at -20??C resulted in an immediate reduction in photosynthesis of most intertidal seaweeds, with the degree of inhibition corresponding to zonation on the shore. For example, photosynthesis in the upper shore fucoid Fucus spiralis was unaffected by 3 h at - 20??C, whereas that of the low-intertidal Fucus edentatus was reduced by 97%. The percentage of frozen tissue water after 3 h at - 20??C was similar in all species, suggesting that differences in susceptibility to freezing are attributable to physiological tolerance rather than avoidance. Freezing intolerant species exhibited massive amino acid release on re-immersion in sea water following freezing. In contrast, amino acid release was much lower in freezing tolerant species. The release of amino acids is believed to be due to loss of plasmalemma integrity, suggesting that the freezing tolerance of seaweeds may be controlled by the plasmalemma. Overall, the results of this study suggest that freezing may play an important role in structuring sub-arctic and boreal intertidal communities. Freezing can operate in 2 ways: (1) as a disturbance excluding sub-littoral and rock pool species from the eulittoral and (2) as a physiological stress affecting relative competitive abilities of eulittoral forms via differential reduction in photosynthesis and hence growth. |
format |
Article in Journal/Newspaper |
author |
Davison, Ian R. Dudgeon, Steven R. Ruan, Hang-Ming |
author_facet |
Davison, Ian R. Dudgeon, Steven R. Ruan, Hang-Ming |
author_sort |
Davison, Ian R. |
title |
Effect of freezing on seaweed photosynthesis |
title_short |
Effect of freezing on seaweed photosynthesis |
title_full |
Effect of freezing on seaweed photosynthesis |
title_fullStr |
Effect of freezing on seaweed photosynthesis |
title_full_unstemmed |
Effect of freezing on seaweed photosynthesis |
title_sort |
effect of freezing on seaweed photosynthesis |
publisher |
Marine Ecology Progress Series |
publishDate |
1989 |
url |
http://hdl.handle.net/10211.2/2810 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
doi.org/10.3354/meps058123 Marine Ecology Progress Series 58, 123-131. (1989) 0171-8630 http://hdl.handle.net/10211.2/2810 |
op_rights |
Copyright 1989 Inter-Research Science Center |
op_doi |
https://doi.org/10.3354/meps058123 |
container_title |
Marine Ecology Progress Series |
container_volume |
58 |
container_start_page |
123 |
op_container_end_page |
131 |
_version_ |
1766344334833090560 |