Search Results - "Kolka, Randall"

Distribution and Uptake Dynamics of Mercury in Leaves of Common Deciduous Tree Species in Minnesota, U.S.A by Laacouri, Aicam, Nater, Edward A, Kolka, Randall K

“…A sequential extraction technique for compartmentalizing mercury (Hg) in leaves was developed based on a water extraction of Hg from the leaf surface followed…”
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Prairie strips improve biodiversity and the delivery of multiple ecosystem services from corn–soybean croplands by Schulte, Lisa A., Niemi, Jarad, Helmers, Matthew J., Liebman, Matt, Arbuckle, J. Gordon, James, David E., Kolka, Randall K., O’Neal, Matthew E., Tomer, Mark D., Tyndall, John C., Asbjornsen, Heidi, Drobney, Pauline, Neal, Jeri, Van Ryswyk, Gary, Witte, Chris

“…Loss of biodiversity and degradation of ecosystem services from agricultural lands remain important challenges in the United States despite decades of spending…”
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Accelerated microbial turnover but constant growth efficiency with warming in soil by Hagerty, Shannon B., van Groenigen, Kees Jan, Allison, Steven D., Hungate, Bruce A., Schwartz, Egbert, Koch, George W., Kolka, Randall K., Dijkstra, Paul

“…Whether rising temperatures will reduce global soil carbon stocks and enhance climate warming remains uncertain, in part because of a poor understanding of the…”
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Reduced substrate supply limits the temperature response of soil organic carbon decomposition by Fissore, Cinzia, Giardina, Christian P., Kolka, Randall K.

“…Controls on the decomposition rate of soil organic carbon (SOC), especially the more stable fraction of SOC, remain poorly understood, with implications for…”
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Fine-root growth in a forested bog is seasonally dynamic, but shallowly distributed in nutrient-poor peat by Iversen, Colleen M., Childs, Joanne, Norby, Richard J., Ontl, Todd A., Kolka, Randall K., Brice, Deanne J., McFarlane, Karis J., Hanson, Paul J.

“…Background and aims Fine roots contribute to ecosystem carbon, water, and nutrient fluxes through resource acquisition, respiration, exudation, and turnover,…”
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New Insights on Ecosystem Mercury Cycling Revealed by Stable Isotopes of Mercury in Water Flowing from a Headwater Peatland Catchment by Woerndle, Glenn E, Tsz-Ki Tsui, Martin, Sebestyen, Stephen D, Blum, Joel D, Nie, Xiangping, Kolka, Randall K

“…Stable isotope compositions of mercury (Hg) were measured in the outlet stream and in soil cores at different landscape positions in a 9.7-ha boreal…”
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Ecoenzymatic stoichiometry and microbial processing of organic matter in northern bogs and fens reveals a common P-limitation between peatland types by Hill, Brian H, Elonen, Colleen M, Jicha, Terri M, Kolka, Randall K, Lehto, LaRae L. P, Sebestyen, Stephen D, Seifert-Monson, Lindsey R

“…We compared carbon (C), nitrogen (N), and phosphorus (P) concentrations in atmospheric deposition, runoff, and soils with microbial respiration [dehydrogenase…”
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Warming drives a ‘hummockification’ of microbial communities associated with decomposing mycorrhizal fungal necromass in peatlands by Maillard, François, Fernandez, Christopher W., Mundra, Sunil, Heckman, Katherine A., Kolka, Randall K., Kauserud, Håvard, Kennedy, Peter G.

“…Summary Dead fungal mycelium (necromass) represents a critical component of soil carbon (C) and nutrient cycles. Assessing how the microbial communities…”
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Soil metabolome response to whole-ecosystem warming at the Spruce and Peatland Responses under Changing Environments experiment by Wilson, Rachel M., Tfaily, Malak M., Kolton, Max, Johnston, Eric R., Petro, Caitlin, Zalman, Cassandra A., Hanson, Paul J., Heyman, Heino M., Kyle, Jennifer E., Hoyt, David W., Eder, Elizabeth K., Purvine, Samuel O., Kolka, Randall K., Sebestyen, Stephen D., Griffiths, Natalie A., Schadt, Christopher W., Keller, Jason K., Bridgham, Scott D., Chanton, Jeffrey P., Kostka, Joel E.

“…In this study, a suite of complementary environmental geochemical analyses, including NMR and gas chromatography-mass spectrometry (GC-MS) analyses of central…”
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An appraisal of Indonesia’s immense peat carbon stock using national peatland maps: uncertainties and potential losses from conversion by Warren, Matthew, Hergoualc’h, Kristell, Kauffman, J. Boone, Murdiyarso, Daniel, Kolka, Randall

“…Background A large proportion of the world’s tropical peatlands occur in Indonesia where rapid conversion and associated losses of carbon, biodiversity and…”
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Review of Ecosystem Level Impacts of Emerald Ash Borer on Black Ash Wetlands: What Does the Future Hold? by Randall K. Kolka, Anthony W. D’Amato, Joseph W. Wagenbrenner, Robert A. Slesak, Thomas G. Pypker, Melissa B. Youngquist, Alexis R. Grinde, Brian J. Palik

“…The emerald ash borer (EAB) is rapidly spreading throughout eastern North America and devastating ecosystems where ash is a component tree. This rapid and…”
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Correction to: Assessing nutrient and sediment load reduction potential of vegetation by utilizing the nutrient tracking tool at the field and watershed scale in a Great Lakes priority watershed by Pawlowski, Ethan D., Karwan, Diana L., Kolka, Randall K.

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Litterfall mercury dry deposition in the eastern USA by Risch, Martin R., DeWild, John F., Krabbenhoft, David P., Kolka, Randall K., Zhang, Leiming

“…Mercury (Hg) in autumn litterfall from predominately deciduous forests was measured in 3 years of samples from 23 Mercury Deposition Network sites in 15 states…”
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Peat loss collocates with a threshold in plant-mycorrhizal associations in drained peatlands encroached by trees by Defrenne, Camille E, Moore, Jessica A M, Tucker, Colin L, Lamit, Louis J, Kane, Evan S, Kolka, Randall K, Chimner, Rodney A, Keller, Jason K, Lilleskov, Erik A

“…Drainage-induced encroachment by trees may have major effects on the carbon balance of northern peatlands, and responses of microbial communities are likely to…”
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Assessing nutrient and sediment load reduction potential of vegetation by utilizing the nutrient tracking tool at the field and watershed scale in a Great Lakes priority watershed by Pawlowski, Ethan D., Karwan, Diana L., Kolka, Randall K.

“…Purpose Nutrient and sediment pollution of surface waters remains a critical challenge for improving water quality. This study takes a user-friendly…”
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Peatland microbial community responses to plant functional group and drought are depth‐dependent by Lamit, Louis J., Romanowicz, Karl J., Potvin, Lynette R., Lennon, Jay T., Tringe, Susannah G., Chimner, Rodney A., Kolka, Randall K., Kane, Evan S., Lilleskov, Erik A.

“…Peatlands store one‐third of Earth's soil carbon, the stability of which is uncertain due to climate change‐driven shifts in hydrology and vegetation, and…”
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Effects of water table position and plant functional group on plant community, aboveground production, and peat properties in a peatland mesocosm experiment (PEATcosm) by Potvin, Lynette R, Kane, Evan S, Chimner, Rodney A, Kolka, Randall K, Lilleskov, Erik A

“…AIMS: Our objective was to assess the impacts of water table position and plant functional type on peat structure, plant community composition and aboveground…”
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Carbon dioxide emissions in relation to water table in a restored fen by Wille, E. Anu, Lenhart, Christian F., Kolka, Randall K.

“…Many peatlands have been drained for anthropogenic purposes, and there is high interest in restoring them for their carbon storage ability and critical…”
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Impacts of historical ditching on peat volume and carbon in northern Minnesota USA peatlands by Krause, Liam, McCullough, Kevin J., Kane, Evan S., Kolka, Randall K., Chimner, Rodney A., Lilleskov, Erik A.

“…Peatlands play a critical role in terrestrial carbon (C) storage, containing an estimated 30% of global soil C, despite occupying only 3% of global land area…”
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Evidence for older carbon loss with lowered water tables and changing plant functional groups in peatlands by Stuart, Julia E. M., Tucker, Colin L., Lilleskov, Erik A., Kolka, Randall K., Chimner, Rodney A., Heckman, Katherine A., Kane, Evan S.

“…A small imbalance in plant productivity and decomposition accounts for the carbon (C) accumulation capacity of peatlands. As climate changes, the continuity of…”
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