Biogeochemical Stratification and Carbonate Dissolution-Precipitation in Hypersaline Microbial Mats (Salt Pond, San Salvador, The Bahamas)
Microbial mat communities host complex biogeochemical processes and play a role in the formation of most carbonate rocks by influencing both carbonate precipitation and dissolution. In this study, the biogeochemistry of microbial mats from the hypersaline Salt Pond, San Salvador, Bahamas are describ...
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| Veröffentlicht in: | Aquatic geochemistry 2011-09, Vol.17 (4-5), p.397-418 |
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| creator | Puckett, Mary K McNeal, Karen S Kirkland, Brenda L Corley, Margaret E Ezell, John E |
| description | Microbial mat communities host complex biogeochemical processes and play a role in the formation of most carbonate rocks by influencing both carbonate precipitation and dissolution. In this study, the biogeochemistry of microbial mats from the hypersaline Salt Pond, San Salvador, Bahamas are described using scanning electron microscopy, X-ray diffraction, microelectrode profiling, fatty acid methyl esters, and carbon and nitrogen analyses. These microbial mats are distinctly layered both chemically and with regard to composition of microbial community, where significant (ρ |
| doi_str_mv | 10.1007/s10498-011-9141-4 |
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In this study, the biogeochemistry of microbial mats from the hypersaline Salt Pond, San Salvador, Bahamas are described using scanning electron microscopy, X-ray diffraction, microelectrode profiling, fatty acid methyl esters, and carbon and nitrogen analyses. These microbial mats are distinctly layered both chemically and with regard to composition of microbial community, where significant (ρ < 0.05) differences are noted between layers and cores. Furthermore, an oxic upper zone and an H2S-rich lower zone dominate the Salt Pond microbial mats, where H2S concentrations were measured approaching 8 mM. The high H2S concentrations along with the lacking evidence of mineral precipitation in SEM images point to the prevalence of carbonate dissolution. Moreover, the high concentrations of organics (3–9%) reveal that the mats are self-sourcing and can provide ample fuel to sustain the highly active heterotrophic (both aerobic and anaerobic) metabolism. 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In this study, the biogeochemistry of microbial mats from the hypersaline Salt Pond, San Salvador, Bahamas are described using scanning electron microscopy, X-ray diffraction, microelectrode profiling, fatty acid methyl esters, and carbon and nitrogen analyses. These microbial mats are distinctly layered both chemically and with regard to composition of microbial community, where significant (ρ < 0.05) differences are noted between layers and cores. Furthermore, an oxic upper zone and an H2S-rich lower zone dominate the Salt Pond microbial mats, where H2S concentrations were measured approaching 8 mM. The high H2S concentrations along with the lacking evidence of mineral precipitation in SEM images point to the prevalence of carbonate dissolution. Moreover, the high concentrations of organics (3–9%) reveal that the mats are self-sourcing and can provide ample fuel to sustain the highly active heterotrophic (both aerobic and anaerobic) metabolism. Seasonal differences in sulfide and oxygen concentrations in Salt Pond mats indicate that the carbonate dissolution and precipitation reactions are dynamic in this hypersaline lake.</description><subject>Biogeochemistry</subject><subject>Carbon</subject><subject>Carbonate rocks</subject><subject>Careers</subject><subject>Chemical precipitation</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Electrodes</subject><subject>Esters</subject><subject>fatty acid methyl esters</subject><subject>Freshwater</subject><subject>Geochemistry</subject><subject>Hydrogen sulfide</subject><subject>Hydrogeology</subject><subject>Hydrology/Water Resources</subject><subject>lakes</subject><subject>metabolism</subject><subject>microbial communities</subject><subject>nitrogen</subject><subject>Organic contaminants</subject><subject>Original Paper</subject><subject>oxygen</subject><subject>Ponds</subject><subject>Rocks</subject><subject>Salts</subject><subject>scanning electron microscopy</subject><subject>seasonal variation</subject><subject>Water Quality/Water Pollution</subject><subject>X-ray diffraction</subject><issn>1380-6165</issn><issn>1573-1421</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kc9qGzEQxkVpoanbB-ipopemELWalXalPTbunxQSGnByFmOt1lZYS64kB_IKferKbKGQQw7DDOj3fWjmI-Qt8E_AufqcgcteMw7AepDA5DNyAq0SDGQDz-ssNGcddO1L8irnO15B3vAT8ufcx42Ldut23uJEVyVh8WOdi4-BYhjoEtM6BiyOfvU5x-lwfGHXyVm_92XmfKAXD3uXMk4-OHrlbYprX_2usGR6usKp0OsYhjO6wlBruschpjN6s3X0HLe4w_zxNXkx4pTdm399QW6_f7tZXrDLXz9-Lr9cMhS9LAxEh1r1fd1FKz5Cg1p0YJ3ox5EjWjeMw7AeUFu-BoChVYqjBGxa7TQ0VizIh9l3n-Lvg8vF7Hy2bpowuHjIRh-9lVBQyfePyLt4SKF-zmjddn2j64UXBGaorpxzcqPZJ7_D9GCAm2M2Zs7G1JObYzZGVk0za3Jlw8al_8ZPid7NohGjwU3y2dyuGg6yhtm2vZLiLyBgm4s</recordid><startdate>20110901</startdate><enddate>20110901</enddate><creator>Puckett, Mary K</creator><creator>McNeal, Karen S</creator><creator>Kirkland, Brenda L</creator><creator>Corley, Margaret E</creator><creator>Ezell, John E</creator><general>Springer-Verlag</general><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QH</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>M2P</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope></search><sort><creationdate>20110901</creationdate><title>Biogeochemical Stratification and Carbonate Dissolution-Precipitation in Hypersaline Microbial Mats (Salt Pond, San Salvador, The Bahamas)</title><author>Puckett, Mary K ; 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In this study, the biogeochemistry of microbial mats from the hypersaline Salt Pond, San Salvador, Bahamas are described using scanning electron microscopy, X-ray diffraction, microelectrode profiling, fatty acid methyl esters, and carbon and nitrogen analyses. These microbial mats are distinctly layered both chemically and with regard to composition of microbial community, where significant (ρ < 0.05) differences are noted between layers and cores. Furthermore, an oxic upper zone and an H2S-rich lower zone dominate the Salt Pond microbial mats, where H2S concentrations were measured approaching 8 mM. The high H2S concentrations along with the lacking evidence of mineral precipitation in SEM images point to the prevalence of carbonate dissolution. Moreover, the high concentrations of organics (3–9%) reveal that the mats are self-sourcing and can provide ample fuel to sustain the highly active heterotrophic (both aerobic and anaerobic) metabolism. Seasonal differences in sulfide and oxygen concentrations in Salt Pond mats indicate that the carbonate dissolution and precipitation reactions are dynamic in this hypersaline lake.</abstract><cop>Dordrecht</cop><pub>Springer-Verlag</pub><doi>10.1007/s10498-011-9141-4</doi><tpages>22</tpages></addata></record> |
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| subjects | Biogeochemistry Carbon Carbonate rocks Careers Chemical precipitation Earth and Environmental Science Earth Sciences Electrodes Esters fatty acid methyl esters Freshwater Geochemistry Hydrogen sulfide Hydrogeology Hydrology/Water Resources lakes metabolism microbial communities nitrogen Organic contaminants Original Paper oxygen Ponds Rocks Salts scanning electron microscopy seasonal variation Water Quality/Water Pollution X-ray diffraction |
| title | Biogeochemical Stratification and Carbonate Dissolution-Precipitation in Hypersaline Microbial Mats (Salt Pond, San Salvador, The Bahamas) |
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