Search Results - "Ostrom, Nathaniel E"

importance of abiotic reactions for nitrous oxide production by Zhu-Barker, Xia, Cavazos, Amanda R, Ostrom, Nathaniel E, Horwath, William R, Glass, Jennifer B

“…The continuous rise of atmospheric nitrous oxide (N₂O) is an environmental issue of global concern. In biogeochemical studies, N₂O production is commonly…”
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Mining the isotopic complexity of nitrous oxide: a review of challenges and opportunities by Ostrom, Nathaniel E., Ostrom, Peggy H.

“…Nitrous oxide (N₂O) is an important focus of international greenhouse gas accounting agreements and mitigation of emissions will likely depend on understanding…”
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Algal-fungal symbiosis leads to photosynthetic mycelium by Du, Zhi-Yan, Zienkiewicz, Krzysztof, Vande Pol, Natalie, Ostrom, Nathaniel E, Benning, Christoph, Bonito, Gregory M

“…Mutualistic interactions between free-living algae and fungi are widespread in nature and are hypothesized to have facilitated the evolution of land plants and…”
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Isotopic Fractionation by a Fungal P450 Nitric Oxide Reductase during the Production of N2O by Yang, Hui, Gandhi, Hasand, Ostrom, Nathaniel E, Hegg, Eric L

“…Nitrous oxide (N2O) is a potent greenhouse gas with a 100-year global warming potential approximately 300 times that of CO2. Because microbes account for over…”
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Microbial life at −13 °C in the brine of an ice-sealed Antarctic lake by Murray, Alison E, Kenig, Fabien, Fritsen, Christian H, McKay, Christopher P, Cawley, Kaelin M, Edwards, Ross, Kuhn, Emanuele, McKnight, Diane M, Ostrom, Nathaniel E, Peng, Vivian, Ponce, Adrian, Priscu, John C, Samarkin, Vladimir, Townsend, Ashley T, Wagh, Protima, Young, Seth A, Yung, Pung To, Doran, Peter T

“…The permanent ice cover of Lake Vida (Antarctica) encapsulates an extreme cryogenic brine ecosystem (−13 °C; salinity, 200). This aphotic ecosystem is anoxic…”
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Nitrous oxide from chemodenitrification: A possible missing link in the Proterozoic greenhouse and the evolution of aerobic respiration by Stanton, Chloe L., Reinhard, Christopher T., Kasting, James F., Ostrom, Nathaniel E., Haslun, Joshua A., Lyons, Timothy W., Glass, Jennifer B.

“…The potent greenhouse gas nitrous oxide (N2O) may have been an important constituent of Earth's atmosphere during Proterozoic (~2.5–0.5 Ga). Here, we tested…”
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Isotopologue fractionation during N2O production by fungal denitrification by Sutka, Robin L., Adams, Gerard C., Ostrom, Nathaniel E., Ostrom, Peggy H.

“…Identifying the importance of fungi to nitrous oxide (N2O) production requires a non‐intrusive method for differentiating between fungal and bacterial N2O…”
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Interlaboratory assessment of nitrous oxide isotopomer analysis by isotope ratio mass spectrometry and laser spectroscopy: current status and perspectives by Mohn, Joachim, Wolf, Benjamin, Toyoda, Sakae, Lin, Cheng-Ting, Liang, Mao-Chang, Brüggemann, Nicolas, Wissel, Holger, Steiker, Amy E., Dyckmans, Jens, Szwec, Lars, Ostrom, Nathaniel E., Casciotti, Karen L., Forbes, Matthew, Giesemann, Anette, Well, Reinhard, Doucett, Richard R., Yarnes, Chris T., Ridley, Anna R., Kaiser, Jan, Yoshida, Naohiro

“…RATIONALE In recent years, research and applications of the N2O site‐specific nitrogen isotope composition have advanced, reflecting awareness of the…”
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Isotopologue effects during N2O reduction in soils and in pure cultures of denitrifiers by Ostrom, Nathaniel E., Pitt, Adam, Sutka, Robin, Ostrom, Peggy H., Grandy, A. Stuart, Huizinga, Kristin M., Robertson, G. Philip

“…Site preference (SP), the difference in δ15N between the central and outer nitrogen atoms in N2O, is a powerful approach for apportioning fluxes of N2O from…”
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Evidence for the predominance of denitrification as a source of N2O in temperate agricultural soils based on isotopologue measurements by Opdyke, Matthew R., Ostrom, Nathaniel E., Ostrom, Peggy H.

“…Isotopologue values were used to quantify the contribution of denitrification to nitrous oxide (N2O) flux in agricultural and early successional fields in…”
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Isotopologue fractionation during microbial reduction of N2O within soil mesocosms as a function of water-filled pore space by Jinuntuya-Nortman, Malee, Sutka, Robin L, Ostrom, Peggy H, Gandhi, Hasand, Ostrom, Nathaniel E

“…Isotopologue analyses of N2O within soil mesocosm experiments were used to evaluate the influence of N2O reduction on isotope fractionation. We investigated…”
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Isotopologue data reveal bacterial denitrification as the primary source of N2O during a high flux event following cultivation of a native temperate grassland by Ostrom, Nathaniel E, Sutka, Robin, Ostrom, Peggy H, Grandy, A. Stuart, Huizinga, Kristin M, Gandhi, Hasand, von Fischer, Joseph C, Robertson, G. Philip

“…The source of N2O in terrestrial ecosystems has long been debated. Both nitrification and denitrification produce N2O but their relative importance remains…”
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Historical Associations of Molecular Measurements of Escherichia coli and Enterococci to Anthropogenic Activities and Climate Variables in Freshwater Sediment Cores by Brooks, Yolanda M, Baustian, Melissa M, Baskaran, Mark, Ostrom, Nathaniel E, Rose, Joan B

“…This study investigated the long-term associations of anthropogenic (sedimentary P, C, and N concentrations, and human population in the watershed), and…”
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Using Oxygen Isotopes of Phosphate To Trace Phosphorus Sources and Cycling in Lake Erie by Elsbury, Katy E, Paytan, Adina, Ostrom, Nathaniel E, Kendall, Carol, Young, Megan B, McLaughlin, Karen, Rollog, Mark E, Watson, Sue

“…Water samples collected during three sampling trips to Lake Erie displayed oxygen isotopic values of dissolved phosphate (δ18Op) that were largely out of…”
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Protocols for Assessing Transformation Rates of Nitrous Oxide in the Water Column by Bourbonnais, Annie, Frey, Claudia, Sun, Xin, Bristow, Laura A., Jayakumar, Amal, Ostrom, Nathaniel E., Casciotti, Karen L., Ward, Bess B.

“…Nitrous oxide (N 2 O) is a potent greenhouse gas and an ozone destroying substance. Yet, clear step-by-step protocols to measure N 2 O transformation rates in…”
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Improving process-based estimates of N2O emissions from soil using temporally extensive chamber techniques and stable isotopes by Smemo, Kurt A., Ostrom, Nathaniel E., Opdyke, Matthew R., Ostrom, Peggy H., Bohm, Sven, Robertson, G. Philip

“…Nitrous oxide (N 2 O) is an important greenhouse gas that is emitted from soil, but obtaining precise N 2 O source and sink strength estimates has been…”
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Using gas chromatography/isotope ratio mass spectrometry to determine the fractionation factor for H2 production by hydrogenases by Yang, Hui, Gandhi, Hasand, Shi, Liang, Kreuzer, Helen W., Ostrom, Nathaniel E., Hegg, Eric L.

“…Hydrogenases catalyze the reversible formation of H2, and they are key enzymes in the biological cycling of H2. H isotopes have the potential to be a very…”
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What can we learn from N2O isotope data? – Analytics, processes and modelling by Yu, Longfei, Harris, Eliza, Lewicka‐Szczebak, Dominika, Barthel, Matti, Blomberg, Margareta R.A., Harris, Stephen J., Johnson, Matthew S., Lehmann, Moritz F., Liisberg, Jesper, Müller, Christoph, Ostrom, Nathaniel E., Six, Johan, Toyoda, Sakae, Yoshida, Naohiro, Mohn, Joachim

“…The isotopic composition of nitrous oxide (N2O) provides useful information for evaluating N2O sources and budgets. Due to the co‐occurrence of multiple N2O…”
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Thermodynamic Constraints on Nitrogen Transformations and Other Biogeochemical Processes at Soil-Stream Interfaces by Hedin, Lars O., von Fischer, Joseph C., Ostrom, Nathaniel E., Kennedy, Brian P., Brown, Michael G., Robertson, G. Philip

“…There is much interest in biogeochemical processes that occur at the interface between soils and streams since, at the scale of landscapes, these habitats may…”
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Nitrous oxide in the Great Lakes: insights from two trophic extremes by Salk, Kateri R., Ostrom, Nathaniel E.

“…Freshwaters are a significant yet understudied component of the global nitrous oxide (N₂O) budget. Despite the potential importance of the Laurentian Great…”
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