Ocean acidification causes a community-wide bacterial pH stress response
Aquatic Sciences Meeting, Aquatic Sciences: Global And Regional Perspectives - North Meets South, 22-27 February 2015, Granada, Spain Anthropogenic CO2 emissions threaten the structure and function of marine food-webs by lowering oceanic pH. Despite their importance for biogeochemical cycling, physi...
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ftcsic:oai:digital.csic.es:10261/135840 2024-02-11T10:07:27+01:00 Ocean acidification causes a community-wide bacterial pH stress response Bunse, Carina Lundin, Daniel Dopson, Mark Karlsson, Christofer M.G. Palovaara, J. Vila-Costa, Maria Calvo, Eva María Marrasé, Cèlia Gasol, Josep M. Pinhassi, Jarone 2015-02-23 http://hdl.handle.net/10261/135840 unknown Association for the Sciences of Limnology and Oceanography http://www.sgmeet.com/aslo/granada2015/program.asp Sí 2015 Aquatic Sciences Meeting. Program Book: 46 (2015) http://hdl.handle.net/10261/135840 none comunicación de congreso http://purl.org/coar/resource_type/c_5794 2015 ftcsic 2024-01-16T10:16:59Z Aquatic Sciences Meeting, Aquatic Sciences: Global And Regional Perspectives - North Meets South, 22-27 February 2015, Granada, Spain Anthropogenic CO2 emissions threaten the structure and function of marine food-webs by lowering oceanic pH. Despite their importance for biogeochemical cycling, physiological responses of bacterioplankton to ocean acidification remain largely unknown. We conducted a mesocosm experiment with Mediterranean seawater treated with CO2 or/and nutrient enrichment and analyzed microbial responses. While community composition remained stable, bacterial community-wide expression analysis revealed that genes involved in respiration, photosynthesis and proton transport, e.g. proteorhodopsin, were significantly enriched in acidified mesocosms. In total, 40% of the transcripts enriched upon acidification were assigned to mechanisms maintaining pH homeostasis. This suggests that acidification-induced proton stress is counteracted by energetically costly proton extrusion mechanisms, purportedly leaving less energy for other metabolic processes. Taxonomic assignment of transcripts showed distinct gene expression patterns among dominant bacterial groups, but also viruses, caused by acidification. These previously unrecognized responses were not visible under phytoplankton bloom conditions that strongly stimulated bacterial growth. Hence, effects of ocean acidification could have particularly pronounced consequences for the energetics and ecosystem functioning of bacterioplankton in oligotrophic conditions Peer Reviewed Conference Object Ocean acidification Digital.CSIC (Spanish National Research Council) |
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Digital.CSIC (Spanish National Research Council) |
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Aquatic Sciences Meeting, Aquatic Sciences: Global And Regional Perspectives - North Meets South, 22-27 February 2015, Granada, Spain Anthropogenic CO2 emissions threaten the structure and function of marine food-webs by lowering oceanic pH. Despite their importance for biogeochemical cycling, physiological responses of bacterioplankton to ocean acidification remain largely unknown. We conducted a mesocosm experiment with Mediterranean seawater treated with CO2 or/and nutrient enrichment and analyzed microbial responses. While community composition remained stable, bacterial community-wide expression analysis revealed that genes involved in respiration, photosynthesis and proton transport, e.g. proteorhodopsin, were significantly enriched in acidified mesocosms. In total, 40% of the transcripts enriched upon acidification were assigned to mechanisms maintaining pH homeostasis. This suggests that acidification-induced proton stress is counteracted by energetically costly proton extrusion mechanisms, purportedly leaving less energy for other metabolic processes. Taxonomic assignment of transcripts showed distinct gene expression patterns among dominant bacterial groups, but also viruses, caused by acidification. These previously unrecognized responses were not visible under phytoplankton bloom conditions that strongly stimulated bacterial growth. Hence, effects of ocean acidification could have particularly pronounced consequences for the energetics and ecosystem functioning of bacterioplankton in oligotrophic conditions Peer Reviewed |
format |
Conference Object |
author |
Bunse, Carina Lundin, Daniel Dopson, Mark Karlsson, Christofer M.G. Palovaara, J. Vila-Costa, Maria Calvo, Eva María Marrasé, Cèlia Gasol, Josep M. Pinhassi, Jarone |
spellingShingle |
Bunse, Carina Lundin, Daniel Dopson, Mark Karlsson, Christofer M.G. Palovaara, J. Vila-Costa, Maria Calvo, Eva María Marrasé, Cèlia Gasol, Josep M. Pinhassi, Jarone Ocean acidification causes a community-wide bacterial pH stress response |
author_facet |
Bunse, Carina Lundin, Daniel Dopson, Mark Karlsson, Christofer M.G. Palovaara, J. Vila-Costa, Maria Calvo, Eva María Marrasé, Cèlia Gasol, Josep M. Pinhassi, Jarone |
author_sort |
Bunse, Carina |
title |
Ocean acidification causes a community-wide bacterial pH stress response |
title_short |
Ocean acidification causes a community-wide bacterial pH stress response |
title_full |
Ocean acidification causes a community-wide bacterial pH stress response |
title_fullStr |
Ocean acidification causes a community-wide bacterial pH stress response |
title_full_unstemmed |
Ocean acidification causes a community-wide bacterial pH stress response |
title_sort |
ocean acidification causes a community-wide bacterial ph stress response |
publisher |
Association for the Sciences of Limnology and Oceanography |
publishDate |
2015 |
url |
http://hdl.handle.net/10261/135840 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.sgmeet.com/aslo/granada2015/program.asp Sí 2015 Aquatic Sciences Meeting. Program Book: 46 (2015) http://hdl.handle.net/10261/135840 |
op_rights |
none |
_version_ |
1790606008084594688 |