Geology and Geological Engineering

Dr. Sarah W. Keenan
Geobiology in Modern and Ancient Systems
Research Teaching People News & Links Publications CV

Publications

Peer-reviewed:

[# = graduate student; % = undergraduate student]
  1. Gladstone, N.S. #, Pieper, E.B., Keenan, S.W., Paterson, A.T., Slay, M., Dooley, K., Engel, A.S., and Niemiller, M.L. (2021). Discovery of the Blue Ridge Springsnail, Fontigens orolibas, Hubricht, 1957 (Gastropoda: Emmericiidae) in east Tennessee and its conservation implications. Freshwater Mollusk Biology and Conservation, in press.
  2. Emmons, A.L.#, Mundroff, A.Z., Keenan, S.W., Davoren, J., Andronowski, J., Carter, D. O., and DeBruyn, J.M. (2020). Characterizing the postmortem human bone microbiome from surface decomposed remains. PLoS One, 15:e0218636, DOI:10.1371/journal.pone.0218636.
  3. Fanter, C.E.#, Lin, Z., Keenan, S.W., Janzen, F.J., Mitchell, T.S., and Warren, D.E. (2020). Development-specific transcriptomic profiling suggests new mechanisms for anoxic survival in the ventricle of overwintering turtles. Journal of Experimental Biology, 223, DOI: 10.1242/jeb.213918.
  4. Keenan, S.W., Schaeffer, S. M., and DeBruyn, J.M. (2019). Spatial changes in soil stable isotopic composition in response to carrion decomposition. Biogeosciences, 16:3929-3939, DOI: 10.5194/bg-16-3929-2019.
  5. Keenan, S.W. and DeBruyn, J. M. (2019). Changes to vertebrate tissue stable isotope (δ15N) composition during decomposition. Scientific Reports, 9:9929, DOI: 10.1038/s41598-019-46368-5.
  6. Keenan, S.W., Pasteris, J.D., Wang, A., and Warren, D.E. (2019). Heterogeneous bioapatite carbonation in western painted turtles is unchanged after anoxia. Comparative Biochemistry and Physiology, Part A, 233: 74-83.
  7. Keenan, S.W., Emmons, A.L.#, Taylor, L.S.#, Phillips, G., Mason, A.R.#, Mundorff, A., Bernard, E.C., Davoren, J., and DeBruyn, J.M. (2018). Spatial impacts of a multi-individual grave on microbial and microfaunal communities and soil biogeochemistry. PLoS One, DOI: 10.1371/journal.pone/0208845.
  8. Odegard, D.T.#, Sonnenfelt, M.A.%, Bledsoe, J.G., Keenan, S.W., Hill, C.A.#, and Warren, D.E. (2018). Changes in the material properties of the shell during simulated aquatic hibernation in the anoxia-tolerant painted turtle. Journal of Experimental Biology, DOI: 10.1242/jeb.176990.
  9. Keenan, S.W., Schaeffer, S.M., Jin, V.L., and DeBruyn, J.M. (2018). Mortality hotspots: nitrogen cycling in forest soils during vertebrate decomposition. Soil Biology and Biochemistry, 121: 165-176.
  10. Keenan, S.W., Widga, C., DeBruyn, J.M., and Schaeffer, S.M. (2018). Nutrient hotspots through time: a field guide to modern and fossil taphonomy in East Tennessee in Engel, A.S. and Hatcher, B., eds., Field Guide 50: 2018 Southeastern Section Meeting Field Guide, pp. 61-74.
  11. Keenan, S.W. and Engel, A.S. (2017). Reconstructing diagenetic conditions of bone at the Gray Fossil Site, Tennessee, USA. Palaeogeography, Palaeoclimatology, Palaeoecology, 471: 48-57.
  12. Keenan, S.W. and Engel, A.S. (2017). Early diagenesis and recrystallization of bone. Geochimica et Cosmochimica Acta, 196: 209-223.
  13. Keenan, S.W. and Tellez, M. (2016). Trachemys scripta elegans (Red-eared slider) and Chrysemys picta bellii (Western painted turtle). Endoparasites. Herpetological Review, 47(3): 451-453.
  14. Keenan, S.W. (2016). From bone to fossil: a review of the diagenesis of bioapatite. American Mineralogist, 101: 1943-1951.
  15. Keenan, S.W., Engel, A.S., Roy, A., and Bovenkamp-Langlois, G.L. (2015). Evaluating the consequences of diagenesis and fossilization on bioapatite lattice structure and composition. Chemical Geology, 413: 18-27.
  16. Keenan, S.W., Hill, C.A., Kandoth, C., Buck, L.T., and Warren, D.E. (2015). Transcriptomic response of the western painted turtle heart and telencephalon to anoxia. PLoS One, DOI: 10.1371/journal.pone.0131669.
  17. Keenan, S.W. and Elsey, R.M. (2015). The good, the bad, and the unknown: microbial symbioses of the American alligator. Integrative and Comparative Biology, DOI: 10.1093/icb/icv006.
  18. Keenan, S.W., Niemiller, M.L., and Williams, B.W. (2014). Observations of Cambarus bartonii cavatus (Decapoda: Cambaridae) and ectosymbiotic branchiobdellidans (Annelida: Clitellata) in Cruze Cave, Knox County, Tennessee, USA. Speleobiology Notes, 6: 55-61.
  19. Keenan, S.W. and Ellwood, B.B. (2014). Geophysical evaluation of the Richland and Holloway Mounds, southeastern Louisiana, U.S.A. Geoarchaeology, 29: 312-325.
  20. Keenan, S.W. and Scannella, J.B. (2014). Paleobiological implications of a Triceratops bonebed from the Hell Creek Formation, Garfield County, northeastern Montana. In (Wilson, G.P., Clemens, W.A., Horner, J.R., and Hartman, J.H., eds.) Through the end of the Cretaceous in the type locality of the Hell Creek Formation in Montana and adjacent areas. Geological Society of America Special Paper 503. Pp.349-364.
  21. Keenan, S.W., Engel, A.S. and Elsey, R.M. (2013). The alligator gut microbiome and implications for archosaur symbioses. Scientific Reports, DOI: 10.1038/srep02877.

Other Publications:

  1. Keenan, S.W. (2019). Fossilization. Encyclopedia of Geology, 2nd Edition, Elsevier (in press).
  2. Keenan, S.W., Paterson, A.T., Niemiller, M.L., Slay, M.E., Clark, S.A., and Engel, A.S. (2017). Observations of the first stygobiont snail (Hydrobiidae, Fontigens sp.) in Tennessee. Proceedings of the 17th International Congress of Speleology, Sydney, Australia, pp. 91-94.
  3. Engel, A.S., Niemiller, M.L., Zigler, K.S., Stephen, C.D.R, Carter, E.T., Paterson, A.T., Keenan, S.W., and Taylor, S.J. (2017). Invertebrate and vertebrate cave fauna records for the Appalachian Valley and Ridge. Proceedings of the 17th International Congress of Speleology, Sydney, Australia, pp. 82-86.
  4. Keenan, S.W. (2013). Freshwater vertebrate animal metagenomics, Alligatorinae. In (Nelson, K., ed.) Encyclopaedia of Metagenomics. Springer, DOI: 10.1007/978-1-4614-6418-1_101-8.

Abstracts (last five years):

  1. DeVault, G.A.#* and Keenan, S.W. (2020). Using tooth wear and decomposition to interpret geochemistry in paleontological localities. Geological Society of America (online, poster, *presenter).
  2. Keenan, S.W. and DeBruyn, J. M. (2020). Surface and subsurface vertebrate decomposition result in protracted soil nitrogen stable isotopic enrichment. Rocky Mountain Section of Geological Society of America, Provo, UT (May, oral presentation, cancelled due to COVID).
  3. Cyrier, M.%* and Keenan, S.W. (2020). Impacts of seasonality on subsurface conditions in Rushmore Cave, South Dakota. Rocky Mountain Geobiology, Golden, CO (*presenter, cancelled due to COVID).
  4. Keenan, S.W. and DeBruyn, J. M. (2019). Quantifying the long-term impacts of animal decomposition on soil biogeochemical cycling. Geological Society of America, Phoenix, AZ (poster)
  5. Keenan, S.W. (2019). Temporal and spatial dynamics of animal decomposition in terrestrial systems. Geobiology Symposium, Banff, Canada (invited oral presentation).
  6. Driebergen, J.#* and Keenan, S.W. (2019). Cosmopolitan anuran assemblages: proxies for the effects of climate change? Society of Vertebrate Paleontology, Brisbane, Australia (*presenter).
  7. Emmons, A.L.#*, Keenan, S.W., Davoren, J., DeBruyn, J.M., Carter, D., and Mundorff, A.Z. (2019). DNA preservation in bone in a multi-individual burial. Proceedings of the American Academy of Forensic Sciences, Baltimore, MD (*presenter).
  8. Mason, A.R.#*, Keenan, S.W., Emmons, A.L.#, Taylor, L.S.#, Phillips, G., Mundorff, A.Z., Bernard, E.C., and DeBruyn, J.M. (2019). Spatial impact of a multi-individual grave on soil biochemistry and microbial ecology. Soil Science Society of America, San Diego, CA (*presenter).
  9. Keenan, S.W. and DeBruyn, J.M. (2018). Spatial and temporal soil responses to carrion decay. Goldschmidt, Boston, MA (poster).
  10. Emmons, A.L.#*, Keenan, S.W., Mason, A.#, Holand, K., Campagna, S., Davoren, J., DeBruyn, J.M, Mundorff, A. (2018). Edaphic and biogenic influences of skeletal DNA degradation in a multi-individual grave. International Society for Microbial Ecology, Leipzig, Germany (*presenter)
  11. Mason, A.R.#*, Keenan, S.W., Emmons, A.L.#, Taylor, L.S.#, Phillips, G., Mundorff, A.Z., Bernard, E.C., and DeBruyn, J.M. (2018). Spatial impact of a multi-individual grave on soil biochemistry and microbial ecology. American Society for Microbiology, Atlanta, GA (*presenter; winner of the ASM outstanding abstract award)
  12. Grimes, E.%*, Keenan, S.W., and DeBruyn, J.M. (2018). The enzymatic and geochemical composition of bone. Undergraduate Research Symposium and EUReKA (Exhibition of Undergraduate Research and Creative Achievements), University of Tennessee (*oral and poster presentations).
  13. Keenan, S.W. and DeBruyn, J.M. (2018). Temperature and microbial effects on nitrogen cycling at simulated mortality decomposition hotspots. Southeastern Geological Society of America, Knoxville, TN (oral presentation)
  14. Keenan, S.W., Widga, C., and DeBruyn, J.M. (2018). Reconstructing nutrient hotspots in time: insights from the Gray Fossil Site, Tennessee. Southeastern Geological Society of America, Knoxville, TN (oral presentation).
  15. Emmons, A.L.#*, Keenan, S.W., Taylor, L.S.#, Davoren, J., DeBruyn, J.M., Phillips, G., Bernard, E.C., and Mundorff, A.Z. (2018). Microbial ecology and soil geochemistry in a multi-individual grave. Proceedings of the American Academy of Forensic Sciences, Seattle, WA (*presenter).
  16. Keenan, S.W., Schaeffer, S.M, Jin, V.L., and DeBruyn, J.M. (2017). Soil biogeochemical cycling and isotope dynamics during vertebrate decomposition. Soil Science Society of America, Tampa, FL (oral presentation).
  17. Taylor, L.S.#*, Phillips, G., Keenan, S.W., Bernard, E.C., and DeBruyn, J.M. (2017). Nematode community succession in vertebrate carcass decomposition soil hot spots. Soil Science Society of America, Tampa, FL (*presenter).
  18. Keenan, S.W., Schaeffer, S.M., and DeBruyn, J.M. (2017). Stable isotope dynamics of vertebrate tissues during decomposition. International Society for Environmental Biogeochemistry, Cairns, Australia (oral presentation).
  19. Bernard, E.C.*, Phillips, G., Taylor, L.S.#, Keenan, S.W., and DeBruyn, J.M. (2017). Nematode assemblages and succession on and under beaver carcasses. Society of Nematologists, Williamsburg, VA (*presenter).
  20. Taylor, L.S.#*, Phillips, G., Keenan, S.W., Bernard, E.C., and DeBruyn, J.M. (2017). Spatial nematode community distributions associated with human decomposition in a mass grave. Society of Nematologists, Williamsburg, VA (*presenter).
  21. Engel, A.S.*, Niemiller, M.L., Zigler, K.S., Stephen, C.D.R, Carter, E.T., Paterson, A.T., Keenan, S.W., and Taylor, S.J. (2017). Invertebrate and vertebrate cave fauna records for the Appalachian Valley and Ridge. Proceedings of the 17th International Congress of Speleology, Sydney, Australia, pp. 82-86 (*presenter).
  22. Keenan, S.W., Paterson, A.T., Niemiller, M.L., Slay, M.E., Clark, S.A., and Engel, A.S.* (2017). Observations of the first stygobiont snail (Hydrobiidae, Fontigens sp.) in Tennessee. Proceedings of the 17th International Congress of Speleology, Sydney, Australia, pp. 91-94 (*presenter).
  23. Keenan, S.W., Schaeffer, S.M., Jin, V.L., and DeBruyn, J.M. (2017). Biogeochemistry of vertebrate decomposition in a forest ecosystem. Southeastern Biogeochemistry Symposium, Athens, GA.
  24. Emmons, A.L.#*, Keenan, S.W., Mundorff, A., Davoren, J., and DeBruyn, J.M. (2017). Skeletal DNA preservation and bone-associated microbes: the implications for DNA sampling strategies in forensic identification. Proceedings of the American Academy of Forensic Sciences, New Orleans, LA, p. 108-109 (*presenter).
  25. DeBruyn, J.M.*, Cobaugh, K.L., Moats, M., Stevens, J.D.#, and Keenan, S.W. (2016). Postmortem hot spots: soil microbial community succession below decomposing vertebrate mortalities. Soil Science Society of America, Phoenix, AZ (*presenter).
  26. Keenan, S.W., Hauther, K.A.#, and DeBruyn, J.M. (2016). Soil responses to a nutrient "hotspot": the biogeochemistry of vertebrate decomposition in a forest ecosystem. Midwest Geobiology, Cincinnati, OH (oral presentation).
  27. Keenan, S.W., Emmons, A.L.#, Mundorff, A., Davoren, J.M., and DeBruyn, J.M. (2016). Bone-associated microbes: implications for the long-term stability of bone in terrestrial systems. Geological Society of America, Denver, CO (oral presentation).
  28. Engel, A.S.*, Paterson, A.T., and Keenan, S.W. (2016). A little drop will do: surprises from epikarstic drip water microbiology. National Speleological Society Convention, Ely, NV (*presenter).
  29. Keenan, S.W., Paterson, A.T., Niemiller, M.L., Slay, M.E., and Engel, A.S. (2016). The first record of a stygobiontic cave snail (Hydrobiidae) from Tennessee. National Speleological Society Convention, Ely, NV (oral presentation).
  30. Keenan, S.W., and Engel, A.S. (2015). Thermodynamic predictions of bioapatite stability in environmental systems. GSA Abstracts with Programs, 47(7):461, session no. 180, Baltimore, MD (oral presentation).
  31. Keenan, S.W., Pasteris, J.D., Wang, A., and Warren, D.E. (2015). A mineralogical perspective on a physiological problem: bioapatite carbonation in the western painted turtle. Midwest Geobiology Symposium, Bloomington, IN (oral presentation).
  32. Engel, A.S.*, Harmon, D.%, Paterson, A.T., and Keenan, S.W. (2015). Cave dripwater microbiology reveals epikarstic biogeochemical cycling that can affect speleothem records. International Society of Environmental Biogeochemistry, Slovenia (*presenter).
  33. Keenan, S.W.+, Pasteris, J.D., Wang, A., and Warren, D.E. (2015). Mineralogical contributions to overwintering survival in the western painted turtle. St. Louis Ecology, Evolution, and Conservation, St. Louis, MO (+invited oral presentation).





Contact: Dept. of Geology and Geological Engineering, 501 E. Saint Joseph St., SDSMT, Rapid City, SD 57701
Phone: (605)394-2461 / Fax: (605)394-6703 / Email: sarah.keenan@sdsmt.edu / Updated: 20 April 2021