Next Article in Journal
Next Article in Special Issue
Previous Article in Journal
Previous Article in Special Issue
Minerals 2014, 4(1), 145-169; doi:10.3390/min4010145
Article

Effects of Elevated Carbon Dioxide and Salinity on the Microbial Diversity in Lithifying Microbial Mats

1,2
, 1
, 3
, 1
 and 1,*
Received: 9 January 2014; in revised form: 7 March 2014 / Accepted: 10 March 2014 / Published: 14 March 2014
(This article belongs to the Special Issue CO2 Sequestration by Mineral Carbonation: Challenges and Advances)
View Full-Text   |   Download PDF [792 KB, uploaded 14 March 2014]
Abstract: Atmospheric levels of carbon dioxide (CO2) are rising at an accelerated rate resulting in changes in the pH and carbonate chemistry of the world’s oceans. However, there is uncertainty regarding the impact these changing environmental conditions have on carbonate-depositing microbial communities. Here, we examine the effects of elevated CO2, three times that of current atmospheric levels, on the microbial diversity associated with lithifying microbial mats. Lithifying microbial mats are complex ecosystems that facilitate the trapping and binding of sediments, and/or the precipitation of calcium carbonate into organosedimentary structures known as microbialites. To examine the impact of rising CO2 and resulting shifts in pH on lithifying microbial mats, we constructed growth chambers that could continually manipulate and monitor the mat environment. The microbial diversity of the various treatments was compared using 16S rRNA gene pyrosequencing. The results indicated that elevated CO2 levels during the six month exposure did not profoundly alter the microbial diversity, community structure, or carbonate precipitation in the microbial mats; however some key taxa, such as the sulfate-reducing bacteria Deltasulfobacterales, were enriched. These results suggest that some carbonate depositing ecosystems, such as the microbialites, may be more resilient to anthropogenic-induced environmental change than previously thought.
Keywords: carbon sequestration; biological-induced mineralization; microbialites; microbial diversity carbon sequestration; biological-induced mineralization; microbialites; microbial diversity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

Ahrendt, S.R.; Mobberley, J.M.; Visscher, P.T.; Koss, L.L.; Foster, J.S. Effects of Elevated Carbon Dioxide and Salinity on the Microbial Diversity in Lithifying Microbial Mats. Minerals 2014, 4, 145-169.

AMA Style

Ahrendt SR, Mobberley JM, Visscher PT, Koss LL, Foster JS. Effects of Elevated Carbon Dioxide and Salinity on the Microbial Diversity in Lithifying Microbial Mats. Minerals. 2014; 4(1):145-169.

Chicago/Turabian Style

Ahrendt, Steven R.; Mobberley, Jennifer M.; Visscher, Pieter T.; Koss, Lawrence L.; Foster, Jamie S. 2014. "Effects of Elevated Carbon Dioxide and Salinity on the Microbial Diversity in Lithifying Microbial Mats." Minerals 4, no. 1: 145-169.


Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert