Minor impact of ocean acidification to the composition of the active microbial community in an Arctic sediment
Summary Effects of ocean acidification on the composition of the active bacterial and archaeal community within A rctic surface sediment was analysed in detail using 16S rRNA 454 pyrosequencing. Intact sediment cores were collected and exposed to one of five different pCO 2 concentrations [380 (pres...
| Published in: | Environmental Microbiology Reports |
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| Main Authors: | , , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2013
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/1758-2229.12087 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F1758-2229.12087 http://onlinelibrary.wiley.com/wol1/doi/10.1111/1758-2229.12087/fullpdf |
| Summary: | Summary Effects of ocean acidification on the composition of the active bacterial and archaeal community within A rctic surface sediment was analysed in detail using 16S rRNA 454 pyrosequencing. Intact sediment cores were collected and exposed to one of five different pCO 2 concentrations [380 (present day), 540, 750, 1120 and 3000 μatm] and RNA extracted after a period of 14 days exposure. Measurements of diversity and multivariate similarity indicated very little difference between pCO 2 treatments. Only when the highest and lowest pCO 2 treatments were compared were significant differences evident, namely increases in the abundance of operational taxonomic units most closely related to the H alobacteria and differences to the presence/absence structure of the P lanctomycetes . The relative abundance of members of the classes P lanctomycetacia and N itrospira increased with increasing pCO 2 concentration, indicating that these groups may be able to take advantage of changing pH or pCO 2 conditions. The modest response of the active microbial communities associated with these sediments may be due to the low and fluctuating pore‐water pH already experienced by sediment microbes, a result of the pH buffering capacity of marine sediments, or due to currently unknown factors. Further research is required to fully understand the impact of elevated CO 2 on sediment physicochemical parameters, biogeochemistry and microbial community dynamics. |
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