Vachula, R.S., Karp, A.T., Denis, E.H., Balascio, N.L., Canuel, E.A., Huang, Y., 2022. Spatially calibrating polycyclic aromatic hydrocarbons (PAHs) as proxies of area burned by vegetation fires: Insights from comparisons of historical data and sedimentary PAH fluxes. Palaeogeography. Palaeoclimatology. Palaeoecology, 596, 110995. Available at: https://doi.org/10.1016/j.palaeo.2022.110995
Karp A.T., Faith J.T., Marlon, J.R., Staver, A.C., (2021) Global response of fire activity to late Quaternary grazer extinctions. Science. 374, 1145-1148. Available at: https://www.science.org/doi/10.1126/science.abj1580
Staver A.C., Abraham J.O., Hempson G.P, Karp A.T., Faith J. T. (2021) The past, present, and future of herbivore impacts on savanna vegetation. Journal of Ecology. Available at: https://doi.org/10.1111/1365-2745.13685
Karp, A. T., Uno, K. T., Polissar, P. J., & Freeman, K. H. (2021). Late Miocene C4 grassland fire feedbacks on the Indian Subcontinent. Paleoceanography and Paleoclimatology, 36, e2020PA004106. Available at: https://doi.org/10.1029/2020PA004106
Polissar, P. J., Uno, K. T., Phelps, S. R., Karp, A. T., Freeman, K. H., & Pensky, J. L. (2021). Hydrologic Changes Drove the Late Miocene Expansion of C4 Grasslands on the Northern Indian Subcontinent. Paleoceanography and Paleoclimatology, 36, e2020PA004108. Available at: https://doi.org/10.1029/2020PA004108
Karp, A. T., Andrae, J. W., McInerney, F. A., Polissar, P. J., & Freeman, K. H. (2021). Soil carbon loss and weak fire feedbacks during Pliocene C4 grassland expansion in Australia. Geophysical Research Letters, 48, e2020GL090964. Available at: https://doi.org/10.1029/2020GL090964
Lyons, S.L., Karp A.T., Bralower T., Grice K., Schaeffer B., Gulick S., Morgan J., Freeman K. H. (2020) Organic Matter from the Chicxulub Crater Exacerbated the K-Pg Impact Winter PNAS Available at: https://doi.org/10.1073/pnas.2004596117
Karp A. T., Holman A. I., Hopper P., Grice K. and Freeman K. H. (2020) Fire Distinguishers: Refined interpretations of paleofire from polycyclic aromatic hydrocarbons. Geochim. Cosmochim. Acta 289, 93–113. Available at: https://doi.org/10.1016/j.gca.2020.08.024.
Karp A. T., Behrensmeyer A. K. and Freeman K. H. (2018) Grassland fire ecology has roots in the late Miocene. PNAS 115, 12130–12135. Available at: https://doi.org/10.1073/pnas.1809758115
Theses Karp A.T., (2020) The role of fire ecology in vegetation change during the Neogene: New applications of molecular and isotopic proxies for vegetation burning in the paleorecord. Pennsylvania State University. Ph.D. Dissertation.
Karp A.T., (2015) Using leaf wax biomarkers to constrain land-use change associated with Mississippian settlements. Washington University in St. Louis Senior Honors Papers
Presentations (selected abstracts)
Karp A.T., Uno., K.T., Berke, M.A., Russell. J.M., Scholz, Faith J. T., C.A., Staver A.C., (2021) Savanna Fire Activity Responds Heterogeneously to Rainfall Shifts During the African Humid Period. 2021 AGU Fall Meeting New Orleans, LA (Invited Oral Presentation)
Karp A.T., Andrae J.W.., McInerney, F.A., Polissar P.J., Freeman K.H. (2019) Molecular insights on fire ecology and carbon cycling during the Neogene C4 expansion in Australia. 2019 GSA Annual Meeting Phoenix Arizona (Invited Oral Presentation)
Karp A.T., Holman, A.I., Hopper, P., Grice, K., Freeman K.H. (2019) Refined paleo-fire interpretations from the distribution patterns and δ13C of fire-derived molecules. 2019 Goldschmidt Conference, Barcelona, Spain (Oral Presentation)
Karp A.T., Uno, K.T.,Polissar, P.J., Freeman K.H., (2018) Fire Distinguishers: Molecular and isotopic tools for identifying grassland burning in deep time. 2018 AGU Fall Meeting Washington, D.C. (Oral Presentation)
Karp A.T., Behrensmeyer A.K., Freeman K.H., (2017) Molecular evidence suggests an active fire-feedback triggered Late-Miocene C4 grassland expansion on the Indian Subcontinent. 2017 GSA Annual Meeting Seattle, WA (Oral Presentation)
Karp A.T., Miller R., Miko S., Ilijanić N., McClure S., Kennett D., Freeman K.H. (2017) Linking the Neolithic farmers of Dalmatia to their paleoenvironment: A preliminary carbon analysis of paleolake sediments. PSU Human Ecology Symposium (Poster Presentation)
Karp A.T., Suess M., Bradley A.S., (2014). Using leaf wax biomarkers to constrain land-use change associated with Mississippian settlements. 2014 Midwest Geobiology Symposium (Poster Presentation)
Invited Talks
"Molecular Approaches Shed Light on Wildfire Dynamics in Ancient Grasslands" EPS Nemmers Seminar Series, Department of Earth and Planetary Sciences, Northwestern University, IL, May 20th 2022
"Heterogenous savanna fire response to paleo-rainfall shifts" Plenary Speaker, PAGES Open Science Meeting, Virtual Conference May 18th 2022
"Herbivore-fire interactions across spatial and temporal scales" Davies Laboratory Seminar, Department of Organismic and Evolutionary Biology, Harvard University, MA, April 6th 2022
"Molecular answers to burning questions: Fire feedbacks in grassy ecosystems" Department of Earth and Planetary Science, Yale University, CT, March 5th 2022
"Isotopic answers to burning questions: Paleofire feedbacks in grassy ecosystems" Isotope Biogeochemistry, Michigan State University, MI, Oct 21st 2021
"Herbivore-fire interactions across spatial and temporal scales" YIBS Seminar Series. Yale Institute for Biospheric Studies. Yale University, October 2021
"Advances in interpreting polycyclic aromatic hydrocarbons (PAHs) as a paleo fire proxy" IPN Paleofire Seminar Series, International Paleofire Network (IPN), June 2021
"Burning Questions: The role of fire in the Neogene expansion of C4 grasslands" Pal(a)eo PERCs Early Career Virtual Seminar, October 2020
"Grassland fire ecology has roots in the late Miocene" Early Career Scientists Symposium, Stable isotopes in ecology, evolution, and conservation, Department of Ecology and Evolution, University of Michigan, March 2019
"Reconstructing paleo-fire feedbacks during the expansion of grassland ecosystems" Climate Dynamics Seminar Series, Earth System Science Center, Pennsylvania State University, February 2019 "Grassland fire ecology has roots in the late Miocene" Sprigg Center Seminar, Department of Earth Sciences, University of Adelaide, Australia , September 2018