Matches in SemOpenAlex for { <https://semopenalex.org/work/W2528975138> ?p ?o ?g. }
- W2528975138 endingPage "29" @default.
- W2528975138 startingPage "14" @default.
- W2528975138 abstract "Understanding early organic matter (OM) alteration and preservation in marine carbonate-evaporite systems could improve understanding of carbon cycling and hydrocarbon source rock prediction in such environments. It is possible that organic-rich microbial mats are important contributors to preserved hydrocarbons and, to explore this, we examined changes in lipid composition in such a mat from a mesohaline intertidal lagoon, eastern Qatar. The mat reaches > 5 cm thickness over a carbonate mud substrate, rich in seagrass, gastropods and other small bioclasts. Clear lamination, with distinct downward colour changes from green to pink to brown, reflects different microbial mat communities. The layers contain spheroids of probable dolomite, the precipitation of which was plausibly bacterially-mediated. Lipids [n-alkanes, fatty acids (FAs), hopanoids, isoprenoid hydrocarbons, dialkyl glycerol diethers (DAGEs), and isoprenoid (0–4) and branched (Ia–IIIa) GDGTs] reflected the diverse mat-building phototrophic, heterotrophic and chemoorganotrophic microorganisms, as well as some likely allochthonous material (i.e. steroids, n-alkanols, high molecular weight n-alkanes). The lipids clearly documented the change in microbial community, with phytene(s) being the predominant hydrocarbon in the phototrophic surface layer. O2 and pH dropped significantly 0.2 cm below the mat surface, coincident with the predominance of Deltaproteobacteria and increased concentrations of archaeal and bacterial glycerol dialkyl glycerol tetraether lipids and C15/C16 and C16/C17 dialkyl glycerol ether lipids in the deeper layers. Archaeol, likely of methanogen origin, was most abundant in the deepest layer. Allochthonous inputs occurred throughout the mat, including abundant steroids, especially dinosterol and dinostanol, possibly related to periodic algal (dinoflagellate) blooms in the Arabian Gulf. Both n-alkanes and n-alkanols appeared to be derived from seagrass. OM content decreased in the deepest mat; this suggests an overall low preservation potential of OM in intertidal mesohaline-hypersaline mats of the Arabian Gulf, which in turn suggests that these are not the major source of hydrocarbons in microbially-dominated carbonate-evaporite systems." @default.
- W2528975138 created "2016-10-14" @default.
- W2528975138 creator A5014920645 @default.
- W2528975138 creator A5015162860 @default.
- W2528975138 creator A5015649490 @default.
- W2528975138 creator A5023007809 @default.
- W2528975138 creator A5030459624 @default.
- W2528975138 creator A5032398155 @default.
- W2528975138 creator A5054445215 @default.
- W2528975138 date "2016-12-01" @default.
- W2528975138 modified "2023-09-25" @default.
- W2528975138 title "Biogeochemistry of intertidal microbial mats from Qatar: New insights from organic matter characterisation" @default.
- W2528975138 cites W1251722559 @default.
- W2528975138 cites W1560632202 @default.
- W2528975138 cites W1788393526 @default.
- W2528975138 cites W1876299372 @default.
- W2528975138 cites W1943121318 @default.
- W2528975138 cites W1964934278 @default.
- W2528975138 cites W1966384168 @default.
- W2528975138 cites W1966617890 @default.
- W2528975138 cites W1968117522 @default.
- W2528975138 cites W1970767275 @default.
- W2528975138 cites W1973571626 @default.
- W2528975138 cites W1974627193 @default.
- W2528975138 cites W1976118957 @default.
- W2528975138 cites W1978119711 @default.
- W2528975138 cites W1979400645 @default.
- W2528975138 cites W1979948787 @default.
- W2528975138 cites W1984217874 @default.
- W2528975138 cites W1984575661 @default.
- W2528975138 cites W1985975904 @default.
- W2528975138 cites W1986899865 @default.
- W2528975138 cites W1987459157 @default.
- W2528975138 cites W1993686096 @default.
- W2528975138 cites W1996340910 @default.
- W2528975138 cites W1998496767 @default.
- W2528975138 cites W1999626549 @default.
- W2528975138 cites W1999685763 @default.
- W2528975138 cites W2003708013 @default.
- W2528975138 cites W2016833369 @default.
- W2528975138 cites W2018768946 @default.
- W2528975138 cites W2019806159 @default.
- W2528975138 cites W2021557246 @default.
- W2528975138 cites W2022261161 @default.
- W2528975138 cites W2028837171 @default.
- W2528975138 cites W2030998361 @default.
- W2528975138 cites W2031903624 @default.
- W2528975138 cites W2033657828 @default.
- W2528975138 cites W2036221853 @default.
- W2528975138 cites W2036811927 @default.
- W2528975138 cites W2036899326 @default.
- W2528975138 cites W2037263411 @default.
- W2528975138 cites W2039356062 @default.
- W2528975138 cites W2041000317 @default.
- W2528975138 cites W2041906387 @default.
- W2528975138 cites W2047959457 @default.
- W2528975138 cites W2048611368 @default.
- W2528975138 cites W2055736575 @default.
- W2528975138 cites W2063281347 @default.
- W2528975138 cites W2065059675 @default.
- W2528975138 cites W2066823311 @default.
- W2528975138 cites W2067332080 @default.
- W2528975138 cites W2074281500 @default.
- W2528975138 cites W2074808326 @default.
- W2528975138 cites W2075417561 @default.
- W2528975138 cites W2078067297 @default.
- W2528975138 cites W2084875806 @default.
- W2528975138 cites W2085863778 @default.
- W2528975138 cites W2088004136 @default.
- W2528975138 cites W2092468345 @default.
- W2528975138 cites W2094068583 @default.
- W2528975138 cites W2095666601 @default.
- W2528975138 cites W2097105739 @default.
- W2528975138 cites W2098678174 @default.
- W2528975138 cites W2103510337 @default.
- W2528975138 cites W2106747349 @default.
- W2528975138 cites W2110364701 @default.
- W2528975138 cites W2111641799 @default.
- W2528975138 cites W2112225789 @default.
- W2528975138 cites W2120650856 @default.
- W2528975138 cites W2122659712 @default.
- W2528975138 cites W2125793616 @default.
- W2528975138 cites W2128855956 @default.
- W2528975138 cites W2129961520 @default.
- W2528975138 cites W2130343346 @default.
- W2528975138 cites W2133720701 @default.
- W2528975138 cites W2134040669 @default.
- W2528975138 cites W2136440351 @default.
- W2528975138 cites W2138416369 @default.
- W2528975138 cites W2140361859 @default.
- W2528975138 cites W2142412499 @default.
- W2528975138 cites W2143869311 @default.
- W2528975138 cites W2144967262 @default.
- W2528975138 cites W2145311720 @default.
- W2528975138 cites W2147495909 @default.
- W2528975138 cites W2148847249 @default.
- W2528975138 cites W2149916005 @default.
- W2528975138 cites W2152006372 @default.