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15 results on '"Frei, Rebecca J."'

1. Human domination of the global water cycle absent from depictions and perceptions

Author

Abbott, Benjamin W., Bishop, Kevin, Zarnetske, Jay P., Minaudo, Camille, Chapin, III, F. S., Krause, Stefan, Hannah, David M., Conner, Lafe, Ellison, David, Godsey, Sarah E., Plont, Stephen, Marçais, Jean, Kolbe, Tamara, Huebner, Amanda, Frei, Rebecca J., Hampton, Tyler, Gu, Sen, Buhman, Madeline, Sara Sayedi, Sayedeh, Ursache, Ovidiu, Chapin, Melissa, Henderson, Kathryn D., and Pinay, Gilles

Published
2019
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3. Bacterioplankton dispersal and biogeochemical function across Alaskan Arctic catchments

Author

Lee, Raymond M., primary, Griffin, Natasha, additional, Jones, Erin, additional, Abbott, Benjamin W., additional, Frei, Rebecca J., additional, Bratsman, Samuel, additional, Proteau, Mary, additional, Errigo, Isabella M., additional, Shogren, Arial, additional, Bowden, William B., additional, Zarnetske, Jay P., additional, and Aanderud, Zachary T., additional

Published
2022
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6. Megafire affects stream sediment flux and dissolved organic matter reactivity, but land use dominates nutrient dynamics in semiarid watersheds

Author

Crandall, Trevor, primary, Jones, Erin, additional, Greenhalgh, Mitchell, additional, Frei, Rebecca J., additional, Griffin, Natasha, additional, Severe, Emilee, additional, Maxwell, Jordan, additional, Patch, Leika, additional, St. Clair, S. Isaac, additional, Bratsman, Sam, additional, Merritt, Marina, additional, Norris, Adam J., additional, Carling, Gregory T., additional, Hansen, Neil, additional, St. Clair, Samuel B., additional, and Abbott, Benjamin W., additional

Published
2021
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7. Citizen science reveals unexpected solute patterns in semiarid river networks

Author

Jones, Erin Fleming, primary, Frei, Rebecca J., additional, Lee, Raymond M., additional, Maxwell, Jordan D., additional, Shoemaker, Rhetta, additional, Follett, Andrew P., additional, Lawson, Gabriella M., additional, Malmfeldt, Madeleine, additional, Watts, Rachel, additional, Aanderud, Zachary T., additional, Allred, Carter, additional, Asay, Allison Tuttle, additional, Buhman, Madeline, additional, Burbidge, Hunter, additional, Call, Amber, additional, Crandall, Trevor, additional, Errigo, Isabella, additional, Griffin, Natasha A., additional, Hansen, Neil C., additional, Howe, Jansen C., additional, Meadows, Emily L., additional, Kujanpaa, Elizabeth, additional, Lange, Leslie, additional, Nelson, Monterey L., additional, Norris, Adam J., additional, Ostlund, Elysse, additional, Suiter, Nicholas J., additional, Tanner, Kaylee, additional, Tolworthy, Joseph, additional, Vargas, Maria Camila, additional, and Abbott, Benjamin W., additional

Published
2021
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8. Tundra wildfire triggers sustained lateral nutrient loss in Alaskan Arctic

Author

Abbott, Benjamin W., primary, Rocha, Adrian V., additional, Shogren, Arial, additional, Zarnetske, Jay P., additional, Iannucci, Frances, additional, Bowden, William B., additional, Bratsman, Samuel P., additional, Patch, Leika, additional, Watts, Rachel, additional, Fulweber, Randy, additional, Frei, Rebecca J., additional, Huebner, Amanda M., additional, Ludwig, Sarah M., additional, Carling, Gregory T., additional, and O’Donnell, Jonathan A., additional

Published
2021
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9. Stream Dissolved Organic Matter in Permafrost Regions Shows Surprising Compositional Similarities but Negative Priming and Nutrient Effects

Author

Wologo, Ethan, primary, Shakil, Sarah, additional, Zolkos, Scott, additional, Textor, Sadie, additional, Ewing, Stephanie, additional, Klassen, Jane, additional, Spencer, Robert G. M., additional, Podgorski, David C., additional, Tank, Suzanne E., additional, Baker, Michelle A., additional, O'Donnell, Jonathan A., additional, Wickland, Kimberly P., additional, Foks, Sydney S. W., additional, Zarnetske, Jay P., additional, Lee‐Cullin, Joseph, additional, Liu, Futing, additional, Yang, Yuanhe, additional, Kortelainen, Pirkko, additional, Kolehmainen, Jaana, additional, Dean, Joshua F., additional, Vonk, Jorien E., additional, Holmes, Robert M., additional, Pinay, Gilles, additional, Powell, Michaela M., additional, Howe, Jansen, additional, Frei, Rebecca J., additional, Bratsman, Samuel P., additional, and Abbott, Benjamin W., additional

Published
2021
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10. Impact of Peat Extraction on Downstream Concentrations and Attenuation of Dissolved Organic Carbon and Nutrients

Author

Frei, Rebecca J., Shewan, Renae, Cao, Ming, Abbott, Benjamin W., and Olefeldt, David

Abstract

Horticultural peat extraction can mobilize dissolved organic matter (DOM) and inorganic nutrients (nitrogen and phosphorous) to surface waters, harming aquatic ecosystems and water quality. However, it is uncertain how peat extraction affects solute concentration across hydrological and seasonal conditions and how biogeochemical processing in downstream drainage networks responds. Over two years, we used repeated, spatially extensive sampling in stream networks of two mixed land‐use catchments (<200 km2) on the subhumid interior plains of western Canada. We used random forest models to disentangle the effects of land cover, hydrology, and temperature on water chemistry. Peatlands were the dominant source of DOM to streams, but we detected no substantial effect of peat extraction on DOM concentration or composition. Stream discharge was the most important predictor of DOM composition, with generally humic‐like DOM becoming fresher during snowmelt and summer base flow. We detected no effect from peat extraction on soluble reactive phosphorous (SRP) or nitrate (NO3−). However, total ammonia nitrogen (TAN) was an order of magnitude higher in subcatchments with >40% extracted peatland cover (median: 1.5 mg TAN L−1) compared to catchments with similar intact peatland cover. Mass balance analysis suggested that DOM and inorganic nutrients synchronously attenuated during low flows. During high flows, DOM and inorganic nitrogen were conservatively transported, while SRP was attenuated, likely sorbing to suspended particles. Our study suggests that excess TAN mobilized by peat extraction is utilized in headwaters during low flow but propagates downstream during high flow, with implications for eutrophication that land managers should consider. Peat extraction in a subhumid continental climate significantly increased stream ammonia concentration, but not carbon or phosphorusStream hydrology strongly influenced dissolved organic matter (DOM) composition, with low flows shifting DOM from aromatic to aliphaticHydrology affected the downstream persistence of DOM and nitrogen, which attenuated at low flows. Phosphorus was attenuated at all flows Peat extraction in a subhumid continental climate significantly increased stream ammonia concentration, but not carbon or phosphorus Stream hydrology strongly influenced dissolved organic matter (DOM) composition, with low flows shifting DOM from aromatic to aliphatic Hydrology affected the downstream persistence of DOM and nitrogen, which attenuated at low flows. Phosphorus was attenuated at all flows

Published
2024
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11. Subsea permafrost carbon stocks and climate change sensitivity estimated by expert assessment

Author

Sayedi, Sayedeh Sara, primary, Abbott, Benjamin W, additional, Thornton, Brett F, additional, Frederick, Jennifer M, additional, Vonk, Jorien E, additional, Overduin, Paul, additional, Schädel, Christina, additional, Schuur, Edward A G, additional, Bourbonnais, Annie, additional, Demidov, Nikita, additional, Gavrilov, Anatoly, additional, He, Shengping, additional, Hugelius, Gustaf, additional, Jakobsson, Martin, additional, Jones, Miriam C, additional, Joung, DongJoo, additional, Kraev, Gleb, additional, Macdonald, Robie W, additional, David McGuire, A, additional, Mu, Cuicui, additional, O’Regan, Matt, additional, Schreiner, Kathryn M, additional, Stranne, Christian, additional, Pizhankova, Elena, additional, Vasiliev, Alexander, additional, Westermann, Sebastian, additional, Zarnetske, Jay P, additional, Zhang, Tingjun, additional, Ghandehari, Mehran, additional, Baeumler, Sarah, additional, Brown, Brian C, additional, and Frei, Rebecca J, additional

Published
2020
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12. Human Health and Economic Costs of Air Pollution in Utah: An Expert Assessment

Author

Errigo, Isabella M., primary, Abbott, Benjamin W., additional, Mendoza, Daniel L., additional, Mitchell, Logan, additional, Sayedi, Sayedeh Sara, additional, Glenn, Jeffrey, additional, Kelly, Kerry E., additional, Beard, John D., additional, Bratsman, Samuel, additional, Carter, Thom, additional, Chaney, Robert A., additional, Follett, Andrew, additional, Freeman, Andrew, additional, Frei, Rebecca J., additional, Greenhalgh, Mitchell, additional, Holmes, Heather A., additional, Howe, Peter D., additional, Johnston, James D., additional, Lange, Leslie, additional, Martin, Randal, additional, Stacey, Audrey, additional, Tran, Trang, additional, and Wilson, Derrek, additional

Published
2020
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13. Predicting Nutrient Incontinence in the Anthropocene at Watershed Scales

Author

Frei, Rebecca J., primary, Abbott, Benjamin W., additional, Dupas, Remi, additional, Gu, Sen, additional, Gruau, Gerard, additional, Thomas, Zahra, additional, Kolbe, Tamara, additional, Aquilina, Luc, additional, Labasque, Thierry, additional, Laverman, Anniet, additional, Fovet, Ophelie, additional, Moatar, Florentina, additional, and Pinay, Gilles, additional

Published
2020
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14. A water cycle for the Anthropocene

Author

Abbott, Benjamin W., primary, Bishop, Kevin, additional, Zarnetske, Jay P., additional, Hannah, David M., additional, Frei, Rebecca J., additional, Minaudo, Camille, additional, Chapin, F.Stuart, additional, Krause, Stefan, additional, Conner, Lafe, additional, Ellison, David, additional, Godsey, Sarah E., additional, Plont, Stephen, additional, Marçais, Jean, additional, Kolbe, Tamara, additional, Huebner, Amanda, additional, Hampton, Tyler, additional, Gu, Sen, additional, Buhman, Madeline, additional, Sayedi, Sayedeh Sara, additional, Ursache, Ovidiu, additional, Chapin, Melissa, additional, Henderson, Kathryn D., additional, and Pinay, Gilles, additional

Published
2019
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15. Consequences of peatland disturbance for dissolved organic matter and nutrient transport and fate in northern catchments

Author

Frei, Rebecca J

Subjects
Peatlands, Catchment Hydrology, Biogeochemistry, Dissolved Organic Matter
Abstract

Abstract: Northern peatlands contain ~415 Pg of carbon (C) in soil organic matter and are significant sources of dissolved organic matter (DOM) in inland waters. DOM includes a range of molecules that are C-rich and may also contain nitrogen (N) and phosphorus (P). The escalating disturbance of peatlands due to climate and land use change disrupts DOM and nutrient composition, transport, and fate in inland waters. Dissolved organic C (DOC; the C component of DOM) plays a pivotal role in the global C cycle, and an overabundance of DOC, as well as excess N and P, can harm aquatic ecosystems and increase water treatment expenses. However, the impact of diverse peatland disturbances on DOM and nutrient export remains uncertain, as does the quality and bioavailability of DOM. Consequently, effectively managing peatland resources amidst changing conditions presents an ongoing challenge. This thesis employs field and lab investigations alongside literature synthesis to unravel the consequences of peatland disturbance on catchment and continental-scale C and nutrient export and fate. In my first study (Chapter 2), I examined how industrial peat extraction influenced DOC and nutrient export and fate in western Canadian stream networks. Studying 55 nested subcatchments (ranging from

Published
2023

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