Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy
The effects of increasing atmospheric CO2 on ocean ecosystems are a major environmental concern, as rapid shoaling of the carbonate saturation horizon is exposing vast areas of marine sediments to corrosive waters worldwide. Natural CO2 gradients off Vulcano, Italy, have revealed profound ecosystem...
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2014
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Online Access: | http://hdl.handle.net/10447/97925 https://doi.org/10.1007/s00248-014-0368-7 |
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ftunivpalermo:oai:iris.unipa.it:10447/97925 2024-02-11T10:07:37+01:00 Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy Kerfahi, D Hall Spencer, JM Tripathi, BM Lee, J Adams, JM MILAZZO, Marco Kerfahi, D Hall-Spencer, JM Tripathi, BM Milazzo, M Lee, J Adams, JM 2014 http://hdl.handle.net/10447/97925 https://doi.org/10.1007/s00248-014-0368-7 eng eng Springer Verlag New York Inc info:eu-repo/semantics/altIdentifier/wos/WOS:000334495000009 volume:67 firstpage:819 lastpage:828 numberofpages:10 journal:MICROBIAL ECOLOGY http://hdl.handle.net/10447/97925 doi:10.1007/s00248-014-0368-7 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84898544314 info:eu-repo/semantics/closedAccess TIDAL FLAT SEDIMENT OCEAN ACIDIFICATION SP NOV MICROBIAL COMMUNITIES PH GRADIENT GEN. NOV FORAMINIFERA ECOSYSTEM CARBON CORAL info:eu-repo/semantics/article 2014 ftunivpalermo https://doi.org/10.1007/s00248-014-0368-7 2024-01-23T23:25:19Z The effects of increasing atmospheric CO2 on ocean ecosystems are a major environmental concern, as rapid shoaling of the carbonate saturation horizon is exposing vast areas of marine sediments to corrosive waters worldwide. Natural CO2 gradients off Vulcano, Italy, have revealed profound ecosystem changes along rocky shore habitats as carbonate saturation levels decrease, but no investigations have yet been made of the sedimentary habitat. Here, we sampled the upper 2 cm of volcanic sand in three zones, ambient (median pCO(2) 419 mu atm, minimum Omega(arag) 3.77), moderately CO2-enriched (median pCO(2) 592 mu atm, minimum Omega(arag) 2.96), and highly CO2-enriched (median pCO(2) 1611 mu atm, minimum Omega(arag) 0.35). We tested the hypothesis that increasing levels of seawater pCO(2) would cause significant shifts in sediment bacterial community composition, as shown recently in epilithic biofilms at the study site. In this study, 454 pyrosequencing of the V1 to V3 region of the 16S rRNA gene revealed a shift in community composition with increasing pCO(2). The relative abundances of most of the dominant genera were unaffected by the pCO(2) gradient, although there were significant differences for some 5 % of the genera present (viz. Georgenia, Lutibacter, Photobacterium, Acinetobacter, and Paenibacillus), and Shannon Diversity was greatest in sediments subject to long-term acidification (> 100 years). Overall, this supports the view that globally increased ocean pCO(2) will be associated with changes in sediment bacterial community composition but that most of these organisms are resilient. However, further work is required to assess whether these results apply to other types of coastal sediments and whether the changes in relative abundance of bacterial taxa that we observed can significantly alter the biogeochemical functions of marine sediments. Article in Journal/Newspaper Ocean acidification IRIS Università degli Studi di Palermo Microbial Ecology 67 4 819 828 |
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Open Polar |
collection |
IRIS Università degli Studi di Palermo |
op_collection_id |
ftunivpalermo |
language |
English |
topic |
TIDAL FLAT SEDIMENT OCEAN ACIDIFICATION SP NOV MICROBIAL COMMUNITIES PH GRADIENT GEN. NOV FORAMINIFERA ECOSYSTEM CARBON CORAL |
spellingShingle |
TIDAL FLAT SEDIMENT OCEAN ACIDIFICATION SP NOV MICROBIAL COMMUNITIES PH GRADIENT GEN. NOV FORAMINIFERA ECOSYSTEM CARBON CORAL Kerfahi, D Hall Spencer, JM Tripathi, BM Lee, J Adams, JM MILAZZO, Marco Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy |
topic_facet |
TIDAL FLAT SEDIMENT OCEAN ACIDIFICATION SP NOV MICROBIAL COMMUNITIES PH GRADIENT GEN. NOV FORAMINIFERA ECOSYSTEM CARBON CORAL |
description |
The effects of increasing atmospheric CO2 on ocean ecosystems are a major environmental concern, as rapid shoaling of the carbonate saturation horizon is exposing vast areas of marine sediments to corrosive waters worldwide. Natural CO2 gradients off Vulcano, Italy, have revealed profound ecosystem changes along rocky shore habitats as carbonate saturation levels decrease, but no investigations have yet been made of the sedimentary habitat. Here, we sampled the upper 2 cm of volcanic sand in three zones, ambient (median pCO(2) 419 mu atm, minimum Omega(arag) 3.77), moderately CO2-enriched (median pCO(2) 592 mu atm, minimum Omega(arag) 2.96), and highly CO2-enriched (median pCO(2) 1611 mu atm, minimum Omega(arag) 0.35). We tested the hypothesis that increasing levels of seawater pCO(2) would cause significant shifts in sediment bacterial community composition, as shown recently in epilithic biofilms at the study site. In this study, 454 pyrosequencing of the V1 to V3 region of the 16S rRNA gene revealed a shift in community composition with increasing pCO(2). The relative abundances of most of the dominant genera were unaffected by the pCO(2) gradient, although there were significant differences for some 5 % of the genera present (viz. Georgenia, Lutibacter, Photobacterium, Acinetobacter, and Paenibacillus), and Shannon Diversity was greatest in sediments subject to long-term acidification (> 100 years). Overall, this supports the view that globally increased ocean pCO(2) will be associated with changes in sediment bacterial community composition but that most of these organisms are resilient. However, further work is required to assess whether these results apply to other types of coastal sediments and whether the changes in relative abundance of bacterial taxa that we observed can significantly alter the biogeochemical functions of marine sediments. |
author2 |
Kerfahi, D Hall-Spencer, JM Tripathi, BM Milazzo, M Lee, J Adams, JM |
format |
Article in Journal/Newspaper |
author |
Kerfahi, D Hall Spencer, JM Tripathi, BM Lee, J Adams, JM MILAZZO, Marco |
author_facet |
Kerfahi, D Hall Spencer, JM Tripathi, BM Lee, J Adams, JM MILAZZO, Marco |
author_sort |
Kerfahi, D |
title |
Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy |
title_short |
Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy |
title_full |
Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy |
title_fullStr |
Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy |
title_full_unstemmed |
Shallow Water Marine Sediment Bacterial Community Shifts Along a Natural CO2 Gradient in the Mediterranean Sea Off Vulcano, Italy |
title_sort |
shallow water marine sediment bacterial community shifts along a natural co2 gradient in the mediterranean sea off vulcano, italy |
publisher |
Springer Verlag New York Inc |
publishDate |
2014 |
url |
http://hdl.handle.net/10447/97925 https://doi.org/10.1007/s00248-014-0368-7 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000334495000009 volume:67 firstpage:819 lastpage:828 numberofpages:10 journal:MICROBIAL ECOLOGY http://hdl.handle.net/10447/97925 doi:10.1007/s00248-014-0368-7 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84898544314 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1007/s00248-014-0368-7 |
container_title |
Microbial Ecology |
container_volume |
67 |
container_issue |
4 |
container_start_page |
819 |
op_container_end_page |
828 |
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1790606264180408320 |