Now showing items 1-20 of 59

    • Seasonal Salinization Decreases Spatial Heterogeneity of Sulfate Reducing Activity 

      Schoepfer, Valerie A.; Burgin, Amy J.; Loecke, Terrance D.; Helton, Ashley M. (MDPI, 2019-04-02)
      Evidence of sulfate input and reduction in coastal freshwater wetlands is often visible in the black iron monosulfide (FeS) complexes that form in iron rich reducing sediments. Using a modified Indicator of Reduction in ...
    • Reply to Wassmann et al.: More data at high sampling intensity from medium- and intense-intermittently flooded rice farms is crucial 

      Kritee, Kritee; Rudek, Joseph; Proville, Jeremy; Adhya, Tapan K.; Loecke, Terrance D.; Nair, Drishya; Ahuja, Richie; Hamburg, Steven P. (National Academy of Sciences, 2019-01-22)
      Here, we briefly respond to critique of our study (1) by Wassmann et al. (2). A detailed response to their letter is available online (edf.org/riceN2O).
    • Mesophilic microorganisms build terrestrial mats analogous to Precambrian microbial jungles 

      Finke, N.; Simister, R. L.; O’Neil, A. H.; Nomosatryo, S.; Henny, C.; MacLean, L. C.; Canfield, D. E.; Konhauser, K.; Lalonde, S. V.; Fowle, David Allan; Crowe, S. A. (Nature Research, 2019-09-20)
      Development of Archean paleosols and patterns of Precambrian rock weathering suggest colonization of continents by subaerial microbial mats long before evolution of land plants in the Phanerozoic Eon. Modern analogues for ...
    • Mato Grosso, Brazil, ground reference data for crop years 2005-2013 (Dataset) 

      Kastens, Jude H.; Brown, J. Christopher; Coutinho, Alexandre Camargo; Bishop, Christopher R.; Esquerdo, Júlio César D. M. (2017)
      The points associated with ‘ground reference set 1’ and ‘ground reference set 2’ identify fields where agricultural cover information was obtained by Embrapa through farmer interviews. The points associated with ‘supplemental ...
    • Spatiotemporal predictions of soil properties and states in variably saturated landscapes 

      Franz, Trenton E.; Loecke, Terrance D.; Burgin, Amy J.; Zhou, Yuzhen; Le, Tri; Moscicki, David (American Geophysical Union, 2017-06-19)
      Understanding greenhouse gas (GHG) fluxes from landscapes with variably saturated soil conditions is challenging given the highly dynamic nature of GHG fluxes in both space and time, dubbed hot spots, and hot moments. On ...
    • Highway Infrastructure, Protected Areas, and Orchid Bee Distribution and Conservation in the Brazilian Amazon 

      Oliveira, Marcio Luiz de; Brown, John C.; Moreira, Marcelo P. (Scientific Research Publishing, 2017-07-28)
      Scientists regularly lament that development and habitat destruction in once isolated and distant areas are promoting species extinction before species can even be known by science. In the Brazilian Amazon, the government’s ...
    • Evidence for the Paleoethnobotany of the Neanderthal: A Review of the Literature 

      Shipley, Gerhard P.; Kindscher, Kelly (Hindawi Publishing Corporation, 2016-09-29)
      Our perception of our closest human relatives, the Neanderthals, has evolved in the last few decades from brutish ape-men to intelligent archaic human peoples. Our understanding and appreciation of their cultural sophistication ...
    • The role of interface organizations in science communication and understanding 

      Osmond, Deanna L.; Nadkarni, Nalini M.; Driscoll, Charles T.; Andrews, Elaine; Gold, Arthur J.; Broussard Allred, Shorna R.; Berkowitz, Alan R.; Klemens, Michael W.; Loecke, Terrance D.; McGarry, Mary Ann (Ecological Society of America, 2010-08-01)
      “Interface” organizations are groups created to foster the use of science in environmental policy, management, and education. Here we compare interface organizations that differ in spatial scale, modes of operation, and ...
    • Gila River Flow Needs Assessment 

      Gori, David; Sooper, Martha S.; Soles, Ellen S.; Stone, Mark; Morrison, Ryan; Turner, Thomas F.; Propst, David L.; Grafin, Gregg; Kindscher, Kelly (Western New Mexico University, 2016-02)
      The Nature Conservancy and a team of 14 academic partners (the project team) received funding from the Bureau of Reclamation’s WaterSMART program and the Desert Landscape Conservation Cooperative in 2012 to conduct this ...
    • Nitrous oxide emission from denitrification in stream and river networks 

      Beaulieu, Jake J.; Tank, Jennifer L.; Hamilton, Stephen K.; Wollheim, Wilfred M.; Hall, Robert O.; Burgin, Amy J. (National Academy of Sciences, 2011-11-11)
      Nitrous oxide (N2O) is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. Anthropogenic nitrogen (N) loading to river networks is a potentially important source of N2O via ...
    • Have we overemphasized the role of denitrification in aquatic ecosystems? A review of nitrate removal pathways 

      Burgin, Amy J.; Hamilton, Stephen K. (Ecological Society of America, 2007-03-01)
      The removal of nitrogen (N) in aquatic ecosystems is of great interest because excessive nitrate in groundwater and surface water is a growing problem. High nitrate loading degrades water quality and is linked to eutrophication ...
    • Nitrate removal in stream ecosystems measured by 15N addition experiments: Denitrification 

      Mullholland, Patrick J.; Hall, Robert O.; Sobota, Daniel J.; Dodds, Walter K.; Findlay, Stuart E. G.; Grimm, Nancy B.; Hamilton, Stephen K.; McDowell, William H.; O'Brien, Jonathan M.; Burgin, Amy J. (Association for the Sciences of Limnology and Oceanography, 2009-05-12)
      We measured denitrification rates using a field 15NO3− tracer-addition approach in a large, cross-site study of nitrate uptake in reference, agricultural, and suburban-urban streams. We measured denitrification rates in ...
    • Nitrate removal in stream ecosystems measured by 15N addition experiments: Total uptake 

      Hall, Robert O.; Tank, Jennifer L.; Sobota, Daniel J.; Mullholland, Patrick J.; O'Brien, Jonathan M.; Dodds, Walter K.; Webster, Jackson R.; Valett, H. Maurice; Burgin, Amy J. (Association for the Sciences of Limnology and Oceanography, 2009-05-12)
      We measured uptake length of 15NO3− in 72 streams in eight regions across the United States and Puerto Rico to develop quantitative predictive models on controls of NO3− uptake length. As part of the Lotic Intersite Nitrogen ...
    • Sediment nitrate manipulation using porewater equilibrators reveals potential for N and S coupling in freshwaters 

      Payne, E. K.; Burgin, Amy J.; Hamilton, Stephen K. (Inter Research, 2009-02-24)
      Anthropogenic nitrogen (N) loading to agricultural and populated landscapes has resulted in elevated nitrate (NO3–) concentrations in ground water, streams and rivers, ultimately causing problems in coastal marine environments ...
    • Restarting the conversation: challenges at the interface between ecology and society 

      Groffman, Peter M.; Stylinski, Cathlyn; Nisbet, Matthew C.; Duarte, Carlos M.; Jordan, Rebecca; Burgin, Amy J.; Previtali, M. Andrea; Coloso, James (Ecological Society of America, 2010-08-01)
      The exchange of information between researchers, resource managers, decision makers, and the general public has long been recognized as a critical need in environmental science. We examine the challenges in using ecological ...
    • Beyond carbon and nitrogen: how the microbial energy economy couples elemental cycles in diverse ecosystems 

      Burgin, Amy J.; Yang, Wendy H.; Hamilton, Stephen K.; Silver, Whendee L. (Ecological Society of America, 2011-02-01)
      Microbial metabolism couples elemental reactions, driving biogeochemical cycles. Assimilatory coupling of elemental cycles, such as the carbon (C), nitrogen (N), and phosphorus cycles, occurs when these elements are ...
    • Soil O2 controls denitrification rates and N2O yield in a riparian wetland 

      Burgin, Amy J.; Groffman, Peter M. (American Geophysical Union, 2012-02-01)
      [1] Wetland soil oxygen (O2) is rarely measured, which limits our understanding of a key regulator of nitrogen loss through denitrification. We asked: (1) How does soil [O2] vary in riparian wetlands? (2) How does this ...
    • The under-ice microbiome of seasonally frozen lakes 

      Bertilsson, Stefan; Burgin, Amy J.; Carey, Caylen C.; Fey, Samuel B.; Grossart, Hans-Peter; Grubisic, Lorena M.; Jones, Ian D.; Kirillin, Georgiy; Lennon, Jay T.; Shade, Ashley; Smyth, Robyn L. (Association for the Sciences of Limnology and Oceanography, 2013-10-21)
      Compared to the well-studied open water of the “growing” season, under-ice conditions in lakes are characterized by low and rather constant temperature, slow water movements, limited light availability, and reduced exchange ...
    • Iron clad wetlands: Soil iron-sulfur buffering determines coastal wetland response to salt water incursion 

      Schoepfer, Valerie A.; Bernhardt, Emily S.; Burgin, Amy J. (American Geophysical Union, 2014-10-25)
      Coastal freshwater wetland chemistry is rapidly changing due to increased frequency of salt water incursion, a consequence of global change. Seasonal salt water incursion introduces sulfate, which microbially reduces to ...
    • The Lotic Intersite Nitrogen Experiments: an example of successful ecological research collaboration 

      Jarecke; Dodds, Walter K.; Webster, Jackson R.; Crenshaw, C. L.; Helton, A. M.; O'Brien, Jonathan M.; Martí, E.; Tank, Jennifer L.; Burgin, Amy J. (University of Chicago Press, 2016-05-06)
      Collaboration is an essential skill for modern ecologists because it brings together diverse expertise, viewpoints, and study systems. The Lotic Intersite Nitrogen eXperiments (LINX I and II), a 17-y research endeavor ...