Search Results - "Lukens, William E"

Carbon and oxygen isotopes in mummified wood reveal warmer and wetter winters in the Siberian Arctic 3000 years ago by Schubert, Brian A., Lukens, William E., Moore, Collin S., Zimov, Nikita, Zimov, Sergey A., Jahren, A. Hope

“…Paleoclimate reconstructions from the Holocene are important for defining baseline conditions in order to interpret and contextualize the effects of modern…”
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The evolution of hominoid locomotor versatility: Evidence from Moroto, a 21 Ma site in Uganda by MacLatchy, Laura M, Cote, Susanne M, Deino, Alan L, Kityo, Robert M, Mugume, Amon A T, Rossie, James B, Sanders, William J, Cosman, Miranda N, Driese, Steven G, Fox, David L, Freeman, April J, Jansma, Rutger J W, Jenkins, Kirsten E H, Kinyanjui, Rahab N, Lukens, William E, McNulty, Kieran P, Novello, Alice, Peppe, Daniel J, Strömberg, Caroline A E, Uno, Kevin T, Winkler, Alisa J, Kingston, John D

“…Living hominoids are distinguished by upright torsos and versatile locomotion. It is hypothesized that these features evolved for feeding on fruit from…”
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Reconstructing pH of Paleosols Using Geochemical Proxies by Lukens, William E., Nordt, Lee C., Stinchcomb, Gary E., Driese, Steven G., Tubbs, Jack D.

“…Soil pH is essential for understanding weathering, nutrient availability, and biological-edaphic relationships. However, standard pH measurement on soils…”
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Oldest evidence of abundant C 4 grasses and habitat heterogeneity in eastern Africa by Peppe, Daniel J, Cote, Susanne M, Deino, Alan L, Fox, David L, Kingston, John D, Kinyanjui, Rahab N, Lukens, William E, MacLatchy, Laura M, Novello, Alice, Strömberg, Caroline A E, Driese, Steven G, Garrett, Nicole D, Hillis, Kayla R, Jacobs, Bonnie F, Jenkins, Kirsten E H, Kityo, Robert M, Lehmann, Thomas, Manthi, Fredrick K, Mbua, Emma N, Michel, Lauren A, Miller, Ellen R, Mugume, Amon A T, Muteti, Samuel N, Nengo, Isaiah O, Oginga, Kennedy O, Phelps, Samuel R, Polissar, Pratigya, Rossie, James B, Stevens, Nancy J, Uno, Kevin T, McNulty, Kieran P

“…The assembly of Africa's iconic C grassland ecosystems is central to evolutionary interpretations of many mammal lineages, including hominins. C grasses are…”
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Seasonal Hydroclimate Recorded in High Resolution δ18O Profiles Across Pinus palustris Growth Rings by Lukens, William E., Narmour, Robert T., Schubert, Brian A.

“…Rainfall amount and intensity are increasing under anthropogenic climate change, but many instrument records span less than a century. The oxygen isotopic…”
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Pliocene Paleoenvironments in the Meade Basin, Southwest Kansas, U.S.A by Lukens, William E., Fox, David L., Snell, Kathryn E., Wiest, Logan A., Layzell, Anthony L., Uno, Kevin T., Polissar, Pratigya J., Martin, Robert A., Fox-Dobbs, Kena, Peláez-Campomanes, Pablo

“…Terrestrial paleoenvironmental reconstructions from the Pliocene Epoch (5.3–2.6 Ma) of the Neogene Period are rare from the North American continental…”
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The Early Miocene Critical Zone at Karungu, Western Kenya: An Equatorial, Open Habitat with Few Primate Remains by Lukens, William E., Lehmann, Thomas, Peppe, Daniel J., Fox, David L., Driese, Steven G., McNulty, Kieran P.

“…Early Miocene outcrops near Karungu, Western Kenya, preserve a range of fluvio-lacustrine, lowland landscapes that contain abundant fossils of terrestrial and…”
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The oxygen isotope value of whole wood, α-cellulose, and holocellulose in modern and fossil wood by Ren, Junbo, Schubert, Brian A., Lukens, William E., Xu, Chenxi

“…The oxygen isotope value (δ18O) of α-cellulose extracted from modern and fossil wood has been used widely to reconstruct climate throughout the Quaternary and…”
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Low oxygen isotope values of fossil cellulose indicate an intense monsoon in East Asia during the late Oligocene by Ren, Junbo, Schubert, Brian A., Lukens, William E., Quan, Cheng

“…The late Oligocene is an important deep-time analog for understanding future changes in the strength of the East Asian monsoon: it represents a climate warmer…”
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Paleovegetation and paleo-pedogenic properties from the upper Miocene Coffee Ranch fossil site in the North American Great Plains by Lukens, William E., Fox, David.L.

“…Modern physical and chemical soil properties can favor or exclude C3 and C4 plants, yet little is known regarding these relationships from deep-time records…”
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Alluvial landform and the occurrence of paleosols in a humid-subtropical climate have an effect on long-term soil organic carbon storage by Ferguson, Benedict, Lukens, William E., El Masri, Bassil, Stinchcomb, Gary E.

“…•SOC varied by alluvial bar, floodplain and terrace, in a humid-subtropical catchment.•Alluvial bars stored more SOC than floodplains, likely due to rapid…”
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Terrestrial evidence for the Lilliput effect across the Cretaceous-Paleogene (K-Pg) boundary by Wiest, Logan A., Lukens, William E., Peppe, Daniel J., Driese, Steven G., Tubbs, Jack

“…Recent research has demonstrated that the Lilliput effect (reduction of body size in biota associated with the aftermath of mass extinctions) affected all…”
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Sedimentology, stratigraphy, and paleoclimate at the late Miocene Coffee Ranch fossil site in the Texas Panhandle by Lukens, William E., Driese, Steven G., Peppe, Daniel J., Loudermilk, Michael

“…The late Miocene Coffee Ranch fossil assemblage contains some of the earliest evidence of C4 herbivory in North America. However, little is known regarding the…”
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Seasonal Hydroclimate Recorded in High Resolution δ 18 O Profiles Across Pinus palustris Growth Rings by Lukens, William E., Narmour, Robert T., Schubert, Brian A.

“…Abstract Rainfall amount and intensity are increasing under anthropogenic climate change, but many instrument records span less than a century. The oxygen…”
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Landscape evolution across the Cretaceous/Paleogene boundary in southwestern North Dakota, U.S.A by Wiest, Logan A., Lukens, William E., Driese, Steven G., Peppe, Daniel J., Forman, Steven L.

“…The Hell Creek Formation and overlying Fort Union Formation record a geologically rapid base-level rise that was approximately contemporaneous with the K/Pg…”
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Oldest evidence of abundant C4 grasses and habitat heterogeneity in eastern Africa by Peppe, Daniel J, Cote, Susanne M, Deino, Alan L, Fox, David L, Kingston, John D, Kinyanjui, Rahab N, Lukens, William E, MacLatchy, Laura M, Novello, Alice, Strömberg, Caroline A E, Driese, Steven G, Garrett, Nicole D, Hillis, Kayla R, Jacobs, Bonnie F, Jenkins, Kirsten E H, Kityo, Robert M, Lehmann, Thomas, Manthi, Fredrick K, Mbua, Emma N, Michel, Lauren A, Miller, Ellen R, Mugume, Amon A T, Muteti, Samuel N, Nengo, Isaiah O, Oginga, Kennedy O, Phelps, Samuel R, Polissar, Pratigya, Rossie, James B, Stevens, Nancy J, Uno, Kevin T, McNulty, Kieran P

“…A new habitat for hominoid emergence?The hominoid lineage underwent a major morphological change in the Miocene, acquiring strong hind legs and a more upright…”
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Paleopedology and paleogeomorphology of the early Oligocene Orella and Whitney Members, Brule Formation, White River Group, Toadstool Geologic Park, Nebraska by Lukens, William E

“…Understanding local and regional reactions to the global Eocene-Oligocene climate transition is a continuing challenge. The White River Group in the North…”
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Paleopedology and paleogeomorphology of the early Oligocene Orella and Whitney Members, Brule Formation, White River Group, Toadstool Geologic Park, Nebraska by Lukens, William E

“…Understanding local and regional reactions to the global Eocene-Oligocene climate transition is a continuing challenge. The White River Group in the North…”
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ONR Developing Technology Insertion Curriculum for New ST Component of DoD's Acquisition Workforce by LUKENS, WILLIAM E

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