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作者:Sarah W. Keenan , Annette Summers Engel
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2017, Vol.196, pp.209-223
摘要:Abstract(#br)One of the most challenging problems in paleobiology is determining how bone transforms from a living tissue into a fossil. The geologic record is replete with vertebrate fossils preserved from a range of depositional environments, including wetland systems. However,...
作者:Sarah W. Keenan , Annette Summers Engel
来源:[J].Palaeogeography, Palaeoclimatology, Palaeoecology(IF 2.745), 2017, Vol.471, pp.48-57
摘要:Abstract(#br)The preservation of vertebrate fossils requires transformation of the original bioapatite mineral matrix, predominantly hydroxylapatite, during diagenesis into a thermodynamically more stable phase. Fossil bone geochemistry and structure provides a wealth of informat...
作者:Kathleen eBrannen-Donnelly , Annette Summers Engel
来源:[J].Frontiers in Microbiology, 2015, Vol.6
摘要:Unchanging physicochemical conditions and nutrient sources over long periods of time in cave and karst subsurface habitats, particularly aquifers, can support stable ecosystems, termed autochthonous microbial endokarst communities (AMEC). AMEC existence is unknown for other ...
作者:Annette Summers Engel , Gudrun Lisa Bovenkamp ...
来源:[J].Chemical Geology(IF 3.154), 2014, Vol.380, pp.1-6
摘要:Abstract(#br)Despite the tremendous importance for geologic systems, there is limited knowledge of sulfur-containing gas-phase geochemical reactions that take place at elevated temperatures, including up to 1000 K. This deficit is at least partly caused by a lack of suitable...
作者:Annette Summers Engel , Erick M. Swenson ...
来源:[J].Marine Pollution Bulletin(IF 2.531), 2014, Vol.87 (1-2), pp.57-67
摘要:Abstract(#br)We measured the concentration of petroleum hydrocarbons in 405 wetland sediment samples immediately before the April 2010 Deepwater Horizon disaster led to their broad-scale oiling, and on nine trips afterwards. The average concentrations of alkanes and PAHs were 604...
作者:Angela M. Green-García , Annette Summers Engel
来源:[J].Estuarine, Coastal and Shelf Science(IF 2.324), 2012, Vol.112, pp.153-161
摘要:Abstract(#br)Despite the ecological and economic importance of Thalassia testudinum (turtle grass) meadows along the Caribbean and Gulf of Mexico coasts, and recognition that microbial activities are critical to plant growth and health, the bacterial diversity of these habit...
作者:Justin E. Birdwell , Annette Summers Engel
来源:[J].Organic Geochemistry(IF 2.518), 2009, Vol.41 (3), pp.270-280
摘要:Abstract(#br)Chromophoric dissolved organic matter (CDOM) was examined using fluorescence and absorbance spectra from sulfidic cave and thermal and non-thermal surface-discharging spring waters. Many of the sites have a limited allochthonous supply of organic matter (OM) and cont...
作者:Annette Summers Engel , Maurizio G. Paoletti
来源:[J].International Journal of Speleology(IF 1.344), 2013, Vol.42 (3), pp.181-192
摘要:The microbial diversity of moonmilk, a hydrated calcium carbonate speleothem, was evaluated from two Italian caves to provide context for the food web of highly-specialized troglobitic beetles, Cansiliella spp. (Leptodirinae), with distinctive carbon and nitrogen isotope values i...
作者:Sarah W. Keenan , Annette Summers Engel , Ruth M. Elsey
来源:[J].Scientific Reports(IF 2.927), 2013, Vol.3 (2), pp.1635-1638
摘要:Abstract(#br)Among vertebrate gastrointestinal microbiome studies, complete representation of taxa is limited, particularly among reptiles. Here, we provide evidence for previously unrecognized host-microbiome associations along the gastrointestinal tract from the American alliga...

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