Now showing items 1-20 of 239

    • A watershed-scale, citizen science approach to quantifying microplastic concentration in a mixed land-use river 

      Barrows, Abigail P.; Christiansen, Katie S.; Bode, Emma T.; Hoellein, Timothy J. (2018-12)
      Microplastic (particles < 5 mm) pollution dynamics are well documented in oceans and increasingly studied in freshwater. We used a watershed-scale approach to examine spatial and temporal patterns in microplastic concentrations ...
    • Metagenomes from high-temperature chemotrophic systems reveal geochemical controls on microbial community structure and function 

      Inskeep, William P.; Rusch, Douglas B.; Jay, Zackary J.; Herrgard, Markus J.; Kozubal, Mark A.; Richardson, Toby H.; Macur, Richard E.; Hamamura, Natsuko; Jennings, Ryan deM.; Fouke, Bruce W.; Reysenbach, Anna-Louise; Roberto, Frank; Young, Mark J.; Schwartz, Ariel; Boyd, Eric S.; Badger, Jonathan H.; Mathur, Eric J.; Ortmann, Alice C.; Bateson, Mary M.; Geesey, Gill G.; Frazier, Marvin (2010-03)
      The Yellowstone caldera contains the most numerous and diverse geothermal systems on Earth, yielding an extensive array of unique high-temperature environments that host a variety of deeply-rooted and understudied Archaea, ...
    • The surface-atmosphere exchange of carbon dioxide in tropical rainforests: Sensitivity to environmental drivers and flux measurement methodology 

      Fu, Zheng; Gerken, Tobias; Bromley, Gabriel T.; Araújo, Alessandro; Bonal, Damien; Burban, Benoit; Ficklin, Darren L.; Fuentes, Jose D.; Goulden, Michael L.; Hirano, Takashi; Kosugi, Yoshiko; Liddell, Michael; Nicolini, Giacomo; Niu, Shuli; Roupsard, Olivier; Stefani, Paolo; Mi, Chunrong; Tofte, Zaddy; Xiao, Jingfeng; Valentini, Riccardo; Wolf, Sebastian; Stoy, Paul C. (2018-12)
      Tropical rainforests play a central role in the Earth system by regulating climate, maintaining biodiversity, and sequestering carbon. They are under threat by direct anthropogenic impacts like deforestation and the indirect ...
    • A New Global Storage-Area-Depth Data Set for Modeling Reservoirs in Land Surface and Earth System Models 

      Yigzaw, Wondmagegn; Li, Hong-Yi; Demissie, Yonas; Hejazi, Mohamad I.; Leung, L. Ruby; Voisin, Nathalie; Payn, Robert A. (2018-12)
      Reservoir storage‐area‐depth relationships are the most important factors controlling thermal stratification in reservoirs and, more broadly, the water, energy, and biogeochemical dynamics in the reservoirs and subsequently ...
    • Multiscale analysis of autotroph-heterotroph interactions in a high-temperature microbial community 

      Hunt, Kristopher A.; Jennings, Ryan deM.; Inskeep, William P.; Carlson, Ross P. (2018-09)
      Interactions among microbial community members can lead to emergent properties, such as enhanced productivity, stability, and robustness. Iron-oxide mats in acidic (pH 2–4), high-temperature (> 65 °C) springs of Yellowstone ...
    • Twenty-five years after: post-introduction association of Mecinus janthinus s.l. with invasive host toadflaxes Linaria vulgaris and Linaria dalmatica in North America 

      Tosevski, Ivo; Sing, Sharlene E.; De Clerck-Floate, Rosemarie; McClay, Alec; Weaver, David K.; Schwarzländer, Mark; Krstic, Oliver; Jovic, Jelena; Gassmann, A. (2018-07)
      Linaria vulgaris, common or yellow toadflax, and Linaria dalmatica, Dalmatian toadflax (Plantaginaceae), are Eurasian perennial forbs invasive throughout temperate North America. These Linaria species have been the targets ...
    • Running off the road: roadside non-native plants invading mountain vegetation 

      McDougall, Keith L.; Lembrechts, Jonas; Rew, Lisa J.; Haider, Sylvia; Cavieres, Lohengrin A.; Kueffer, Christoph; Milbau, Ann; Naylor, Bridgett J.; Nuñez, Martin A.; Pauchard, Aníbal; Seipel, Timothy F.; Speziale, Karina L.; Wright, Genevieve T.; Alexander, Jake M. (2018-06)
      Prevention is regarded as a cost-effective management action to avoid unwanted impacts of non-native species. However, targeted prevention can be difficult if little is known about the traits of successfully invading ...
    • Linking flux network measurements to continental scale simulations: Ecosystem gas exchange capacity along a European transect under non-water-stressed conditions 

      Owen, Katherine E.; Tenhunen, John; Reichstein, Markus; Wang, Quan; Falge, Eva; Geyer, Ralf; Xiao, Xiangming; Stoy, Paul C.; Ammann, Christof; Arain, M. Altaf; Aubinet, Marc; Aurela, Mika; Bernhofer, Christian; Chojnicki, Bogdan H.; Granier, Andre; Gruenwald, Thomas; Hadley, Julian; Heinesch, Bernard; Hollinger, David Y.; Knohl, Alexander; Kutsch, Werner L.; Lohila, Annalea; Meyers, Tilden P.; Moors, Eddy J.; Moureaux, Christine; Pilegaard, Kim; Saigusa, Nobuko; Verma, Shashi B.; Vesala, Timo; Vogel, Chris (2007-01)
      This paper examines long‐term eddy covariance data from 18 European and 17 North American and Asian forest, wetland, tundra, grassland, and cropland sites under non‐water‐stressed conditions with an empirical rectangular ...
    • Linking beaver dam affected flow dynamics to upstream passage of Arctic grayling 

      Cutting, Kyle A.; Ferguson, Jake M.; Anderson, Michelle L.; Cook, Kristen; Davis, Stacy C.; Levine, Rebekah (2018-12)
      Beaver reintroductions and beaver dam structures are an increasingly utilized ecological tool for rehabilitating degraded streams, yet beaver dams can potentially impact upstream fish migrations. We collected two years of ...
    • Perceptions, Experiences, and Priorities Supporting Agro-ecosystem Management Decisions Differ Among Agricultural Producers, Consultants, and Researchers 

      McKenzie, Sean C.; Parkinson, Hilary A.; Mangold, Jane M.; Burrows, Mary; Ahmed, Selena; Menalled, Fabian D. (2018-11)
      The sustainability of agriculture depends as much on the natural resources required for production as it does on the stakeholders that manage those resources. It is thus essential to understand the variables that influence ...
    • Deriving a light use efficiency model from eddy covariance flux data for predicting daily gross primary production across biomes 

      Yuan, Wenping; Liu, Shuguang; Zhou, Guangsheng; Zhou, Guoyi; Tieszen, Larry L.; Baldocchi, Dennis D.; Bernhofer, Christian; Gholz, Henry; Goldstein, Allen H.; Goulden, Michael L.; Hollinger, David Y.; Hu, Yueming; Law, Beverly E.; Stoy, Paul C.; Vesala, Timo; Wofsy, Steven C. (2007-04)
      The quantitative simulation of gross primary production (GPP) at various spatial and temporal scales has been a major challenge in quantifying the global carbon cycle. We developed a light use efficiency (LUE) daily GPP ...
    • Checklist of bees (Hymenoptera: Apoidea) from small diversified vegetable farms in south-western Montana 

      Delphia, Casey M.; Griswold, Terry; Reese, Elizabeth G.; O'Neill, Kevin M.; Burkle, Laura A. (2019-01)
      Background: Over three years (2013-2015), we sampled bees using nets and bowl traps on four diversified vegetable farms in Gallatin County, Montana, USA, as part of a study evaluating the use of wildflower strips for ...
    • Interannual variability of ecosystem carbon exchange: From observation to prediction 

      Niu, Shuli; Zheng, Fu; Yiqi, Luo; Stoy, Paul C.; Keenan, Trevor F.; Poulter, Benjamin; Zhang, Leiming; Piao, Shilong; Zhou, Xuhui; Zheng, Han; Han, Jiayin; Wang, Qiufeng; Yu, Guirui (2017-09)
      Aim Terrestrial ecosystems have sequestered, on average, the equivalent of 30% of anthropogenic carbon (C) emissions during the past decades, but annual sequestration varies from year to year. For effective C management, ...
    • Land management and land-cover change have impacts of similar magnitude on surface temperature 

      Luyssaert, Sebastiaan; Jammet, Mathilde; Stoy, Paul C.; Estel, Stephan; Pongratz, Julia; Ceschia, Eric; Churkina, Galina; Don, A.; Erb, K.; Ferlicoq, M.; Gielen, Bert; Grünwald, Thomas; Houghton, Richard A.; Klumpp, K.; Knohl, A.; Kolb, T.; Kuemmerle, T.; Laurila, T.; Lohila, A.; Loustau, Denis; Meyfroidt, P.; Moors, Eddy J.; Novick, Kimberly A.; Otto, J.; Pilegaard, Kim; Pio, C. A.; Rambal, Serge; Rebmann, C.; Ryder, J.; Suyker, Andrew E.; Varlagin, Andrej B.; Wattenbach, M.; Dolman, A. J. (2014-04)
      Anthropogenic changes to land cover (LCC) remain common, but continuing land scarcity promotes the widespread intensification of land management changes (LMC) to better satisfy societal demand for food, fibre, fuel and ...
    • Albedo estimates for land surface models and support for a new paradigm based on foliage nitrogen concentration 

      Hollinger, David Y.; Ollinger, S. V.; Richardson, Andrew D.; Meyers, T. P.; Dail, D. B.; Martin, M. E.; Scott, N. A.; Arkebauer, T. J.; Baldocchi, Dennis D.; Clark, K. L.; Curtis, P. S.; Desai, Ankur R.; Dragoni, Danilo; Goulden, Michael L.; Gu, Lianhong; Katul, Gabriel G.; Pallardy, S. G.; Paw U, Kyaw Tha; Schmid, H. P.; Stoy, Paul C.; Suyker, Andrew E.; Verma, Shashi B. (2010-02)
      Vegetation albedo is a critical component of the Earth's climate system, yet efforts to evaluate and improve albedo parameterizations in climate models have lagged relative to other aspects of model development. Here, we ...
    • Separation of Net Ecosystem Exchange into Assimilation and Respiration Using a Light Response Curve Approach: Critical Issues and Global Evaluation 

      Lasslop, Gitta; Reichstein, Markus; Papale, Dario; Richardson, Andrew D.; Arneth, Almut; Barr, Alan G.; Stoy, Paul C.; Wohlfahrt, Georg (2010-01)
      The measured net ecosystem exchange (NEE) of CO2 between the ecosystem and the atmosphere reflects the balance between gross CO2 assimilation [gross primary production (GPP)] and ecosystem respiration (Reco). For understanding ...
    • Productivity, Respiration, and Light-Response Parameters of World Grassland and Agroecosystems Derived From Flux-Tower Measurements 

      Gilmanov, Tagir G.; Aires, Luis M. I.; Barcza, Zoltan; Baron, Vern S.; Belelli, Luca; Beringer, Jason; Billesbach, David; Bonal, Damien; Bradford, James A.; Ceschia, Eric; Cook, D.; Corradi, Chiara A. R.; Frank, Albert B.; Gianelle, Damiano; Gimeno, Cristina; Gruenwald, Thomas; Guo, Haiqiang; Hanan, Niall; Haszpra, Laszlo; Heilman, J.; Jacobs, Adrie F. G.; Jones, Mike B.; Johnson, Douglas A.; Kiely, Gerard K.; Li, Shenggong; Magliulo, Vincenzo; Moors, Eddy; Nagy, Zoltan; Nasyrov, M.; Owensby, Clenton E.; Pintér, Krisztina; Pio, Casimiro; Reichstein, Markus; Sanz-Sanchez, Maria José; Scott, Russell L.; Soussana, Jean-Francois; Stoy, Paul C.; Svejcar, T.; Tuba, Zoltán; Zhou, Guangsheng (2010-01)
      Grasslands and agroecosystems occupy one-third of the terrestrial area, but their contribution to the global carbon cycle remains uncertain. We used a set of 316 site-years of CO2 exchange measurements to quantify gross ...
    • Upscaling as ecological information transfer: A simple framework with application to arctic ecosystem carbon exchange 

      Stoy, Paul C.; Williams, Mathew; Prieto-Blanco, Ana; Huntley, Brian; Baxter, Robert; Lewis, Philip (2009-06)
      Transferring ecological information across scale often involves spatial aggregation, which alters information content and may bias estimates if the scaling process is nonlinear. Here, a potential solution, the preservation ...
    • Artificial drainage and associated carbon fluxes (CO2/CH4) in tundra ecosystems 

      Merbold, L.; Kutsch, Werner L.; Kolle, O.; Zimov, S. A.; Corradi, C.; Stoy, Paul C.; Schulze, E.-D. (2009-11)
      Ecosystem flux measurements using the eddy covariance (EC) technique were undertaken in 4 subsequent years during summer for a total of 562 days in an arctic wet tundra ecosystem, located near Cherskii, Far‐Eastern Federal ...
    • Nocturnal Evapotranspiration in Eddy-Covariance Records from Three Co-Located Ecosystems in the Southeastern U.S.: Implications for Annual Fluxes 

      Novick, Kimberly A.; Oren, Ram; Stoy, Paul C.; Siqueira, Mario B. S.; Katul, Gabriel G. (2009-09)
      Nocturnal evapotranspiration (ETN) is often assumed to be negligible in terrestrial ecosystems, reflecting the common assumption that plant stomata close at night to prevent water loss from transpiration. However, recent ...