Smithsonian Environmental Research Center: Recent submissions

  • Nitrogen Dynamics in Two Created Riparian Wetlands over Space and Time 
    Bernal, Blanca; Anderson, Christopher J.; Mitsch, William J. (2017)
    AbstractTemporal and spatial variations of nitrogen (N) soil storages and fluxes were examined at two 1-ha created riverine wetlands in the U.S. Midwest. Soil N content (total N, organic-N, NO3-N, and NH4-N), N accumulation ...
  • Limits to soil carbon stability; Deep, ancient soil carbon decomposition stimulated by new labile organic inputs 
    Bernal, Blanca; McKinley, Duncan C.; Hungate, Bruce A.; White, Paul M.; Mozdzer, Thomas J.; Megonigal, J. Patrick (2016)
    Carbon (C) buried deep in soil (below 1 m) is often hundreds to thousands of years old, though the stability and sensitivity of this deep C to environmental change are not well understood. We examined the C dynamics in ...
  • Historical land use and stand age effects on forest soil properties in the Mid-Atlantic US 
    Yesilonis, Ian; Szlavecz, K.; Pouyat, Richard; Whigham, Dennis F.; Xia, L. (2016)
    The conversion of agriculture lands to forest has been occurring in parts of North America for decades. The legacy of management activity during this transition is reflected in soil physical and chemical properties years ...
  • Contributions of organic and inorganic matter to sediment volume and accretion in tidal wetlands at steady state 
    Morris, James T.; Barber, Donald C.; Callaway, John C.; Chambers, Randy; Hagen, Scott C.; Hopkinson, Charles S.; Johnson, Beverly J.; Megonigal, J. Patrick; Neubauer, Scott C.; Troxler, Tiffany; Wigand, Cathleen (2016)
    A mixing model derived from first principles describes the bulk density (BD) of intertidal wetland sediments as a function of loss on ignition (LOI). The model assumes the bulk volume of sediment equates to the sum of ...
  • Local and regional disturbances associated with the invasion of Chesapeake Bay marshes by the common reed <I>Phragmites australis</I> 
    Sciance, M. Benjamin; Patrick, Christopher J.; Weller, Donald E.; Williams, Meghan N.; McCormick, Melissa K.; Hazelton, Eric L. G. (2016)
    The invasion of wetlands by Phragmites australis is a conservation concern across North America. We used the invasion of Chesapeake Bay wetlands by P. australis as a model system to examine the effects of regional and local ...
  • Methane emissions from the trunks of living trees on upland soils 
    Wang, Zhi-Ping; Gu, Qian; Deng, Feng-Dan; Huang, Jian-Hui; Megonigal, J. Patrick; Yu, Qiang; Lü, Xiao-Tao; Li, Ling-Hao; Chang, Scott; Zhang, Yun-Hai; Feng, Jin-Chao; Han, Xing-Guo (2016)
    * Upland forests are traditionally thought to be net sinks for atmospheric methane (CH4). In such forests, in situ CH4 fluxes on tree trunks have been neglected relative to soil and canopy fluxes. * We measured in situ CH4 ...
  • First record and establishment of Branchiomma coheni (Polychaeta: Sabellidae) in the Atlantic Ocean and review of non indigenous species of the genus 
    Keppel, Erica; Tovar Hernández, Maria Ana; Ruiz, Gregory M. (2015)
    Sabellidae are among the most visible polychaetes of the hard substrate fouling communities and are colonizing new geographic areas. The fouling community was surveyed in 25 shallow coastal estuaries on the Atlantic and ...
  • Balancing watershed nitrogen budgets: accounting for biogenic gases in streams 
    Gardner, John R.; Fisher, Thomas R.; Jordan, Thomas E.; Knee, Karen L. (2016)
  • Global change accelerates carbon assimilation by a wetland ecosystem engineer 
    Caplan, Joshua S.; Hager, Rachel N.; Megonigal, J. Patrick; Mozdzer, Thomas J. (2015)
    The primary productivity of coastal wetlands is changing dramatically in response to rising atmospheric carbon dioxide (CO 2 ) concentrations, nitrogen (N) enrichment, and invasions by novel species, potentially altering ...
  • An automated monitoring and control system for flow-through co-cycling hypoxia and pH experiments 
    Burrell, Rebecca B.; Keppel, Andrew G.; Clark, Virginia M.; Breitburg, Denise L. (2016)
    Acidification research has exploded in recent years, however, experiments testing effects of co-cycling hypoxia and pH on ecological and physiological processes are rare, despite the pervasiveness and potential importance ...
  • Elevated CO<SUB>2</SUB> promotes long-term nitrogen accumulation only in combination with nitrogen addition 
    Pastore, Melissa A.; Megonigal, J. Patrick; Langley, J. Adam (2016)
    Biogeochemical models that incorporate nitrogen (N) limitation indicate that N availability will control the magnitude of ecosystem carbon uptake in response to rising CO2. Some models, however, suggest that elevated CO2 ...
  • Global prevalence and distribution of genes and microorganisms involved in mercury methylation 
    Podar, Mircea; Gilmour, Cynthia C.; Brandt, Craig C.; Soren, Allyson; Brown, Steven D.; Crable, Bryan R.; Palumbo, Anthony V.; Somenahally, Anil C.; Elias, Dwayne A. (2015)
    Mercury (Hg) methylation produces the neurotoxic, highly bioaccumulative methylmercury (MeHg). The highly conserved nature of the recently identified Hg methylation genes hgcAB provides a foundation for broadly evaluating ...
  • Interannual variation in submerged aquatic vegetation and its relationship to water quality in subestuaries of Chesapeake Bay 
    Patrick, Christopher J.; Weller, Donald E. (2015)
  • The ocean sampling day consortium 
    Kopf, Anna; Bicak, Mesude; Kottmann, Renzo; Schnetzer, Julia; Kostadinov, Ivaylo; Lehmann, Katja; Fernandez-Guerra, Antonio; Jeanthon, Christian; Rahav, Eyal; Ullrich, Matthias; Wichels, Antje; Gerdts, Gunnar; Polymenakou, Paraskevi; Kotoulas, Giorgos; Siam, Rania; Abdallah, Rehab Z.; Sonnenschein, Eva C.; Cariou, Thierry; O'Gara, Fergal; Jackson, Stephen; Orlic, Sandi; Steinke, Michael; Busch, Julia; Duarte, Bernardo; Caçador, Isabel; Canning-Clode, João; Bobrova, Oleksandra; Marteinsson, Viggo; Reynisson, Eyjolfur; Loureiro, Clara Magalhães; Luna, Gian Marco; Quero, Grazia Marina; Löscher, Carolin,R.; Kremp, Anke; DeLorenzo, Marie E.; Øvreås, Lise; Tolman, Jennifer; LaRoche, Julie; Penna, Antonella; Frischer, Marc; Davis, Timothy; Katherine, Barker; Meyer, Christopher P.; Ramos, Sandra; Magalhães, Catarina; Jude-Lemeilleur, Florence; Aguirre-Macedo, Ma; Wang, Shiao; Poulton, Nicole; Jones, Scott; Collin, Rachel; Fuhrman, Jed A.; Conan, Pascal; Alonso, Cecilia; Stambler, Noga; Goodwin, Kelly; Yakimov, Michael M.; Baltar, Federico; Bodrossy, Levente; Kamp, Van De; Frampton, Dion M. F.; Ostrowski, Martin; Van Ruth, Paul; Malthouse, Paul; Claus, Simon; Deneudt, Klaas; Mortelmans, Jonas; Pitois, Sophie; Wallom, David; Salter, Ian; Costa, Rodrigo; Schroeder, Declan C.; Kandil, Mahrous M.; Amaral, Valentina; Biancalana, Florencia; Santana, Rafael; Pedrotti, Maria Luiza; Yoshida, Takashi; Ogata, Hiroyuki; Ingleton, Tim; Munnik, Kate; Rodriguez-Ezpeleta, Naiara; Berteaux-Lecellier, Veronique; Wecker, Patricia; Cancio, Ibon; Vaulot, Daniel; Bienhold, Christina; Ghazal, Hassan; Chaouni, Bouchra; Essayeh, Soumya; Ettamimi, Sara; Zaid, El Houcine; Boukhatem, Noureddine; Bouali, Abderrahim; Chahboune, Rajaa; Barrijal, Said; Timinouni, Mohammed; El Otmani, Fatima; Bennani, Mohamed; Mea, Marianna; Todorova, Nadezhda; Karamfilov, Ventzislav; ten Hoopen, Petra; Cochrane, Guy; L'Haridon, Stephane; Bizsel, Kemal Can; Vezzi, Alessandro; Lauro, Federico M.; Martin, Patrick; Jensen, Rachelle M.; Hinks, Jamie; Gebbels, Susan; Rosselli, Riccardo; De Pascale, Fabio; Schiavon, Riccardo; dos Santos, Antonina; Villar, Emilie; Pesant, Stéphane; Cataletto, Bruno; Malfatti, Francesca; Edirisinghe, Ranjith; Silveira, Jorge A. Herrera; Barbier, Michele; Turk, Valentina; Tinta, Tinkara; Fuller, Wayne J.; Salihoglu, Ilkay; Serakinci, Nedime; Ergoren, Mahmut Cerkez; Bresnan, Eileen; Iriberri, Juan; Nyhus, Paul Anders Fronth; Bente, Edvardsen; Karlsen, Hans Erik; Golyshin, Peter N.; Gasol, Josep M.; Moncheva, Snejana; Dzhembekova, Nina; Johnson, Zackary; Sinigalliano, Christopher David; Gidley, Maribeth Louise; Zingone, Adriana; Danovaro, Roberto; Tsiamis, George; Clark, Melody S.; Costa, Ana Cristina; El Bour, Monia; Martins, Ana M.; Collins, R. E.; Ducluzeau, Anne-Lise; Martinez, Jonathan; Costello, Mark J.; Amaral-Zettler, Linda; Gilbert, Jack A.; Davies, Neil; Field, Dawn; Glöckner, Frank Oliver (2015)
    Ocean Sampling Day was initiated by the EU-funded Micro B3 (Marine Microbial Biodiversity, Bioinformatics, Biotechnology) project to obtain a snapshot of the marine microbial biodiversity and function of the world's oceans. ...
  • The Relationship Between Shoreline Armoring and Adjacent Submerged Aquatic Vegetation in Chesapeake Bay and Nearby Atlantic Coastal Bays 
    Patrick, Christopher J.; Weller, Donald E.; Ryder, Micah (2016)
    Shoreline armoring is an ancient and globally used engineering strategy to prevent shoreline erosion along marine, estuarine, and freshwater coastlines. Armoring alters the land water interface and has the potential to ...
  • Environmental factors influencing <SUP>d13</SUP>C and <SUP>d15</SUP>N in three Chesapeake Bay fishes 
    Davias, Lori A.; Kornis, Matthew S.; Breitburg, Denise L. (2014)
    Davias, L. A., Kornis, M. S., and Breitburg, D. L. Environmental factors influencing d13C and d15N in three Chesapeake Bay fishes. ICES Journal of Marine Science, doi:10.1093/icesjms/fst143. Stable isotope analysis has ...
  • Fine-scale vertical distributions of Mnemiopsis leidyi ctenophores: predation on copepods relative to stratification and hypoxia 
    Purcell, Je; Decker, Mb; Breitburg, Denise L.; Broughton, Kj (2014)
  • Controls on Temperature in Salmonid-Bearing Headwater Streams in Two Common Hydrogeologic Settings, Kenai Peninsula, Alaska 
    Callahan, Michael K.; Rains, Mark C.; Bellino, Jason C.; Walker, Coowe M.; Baird, Steven J.; Whigham, Dennis F.; King, Ryan S. (2015)
    Headwater streams are the most numerous in terms of both number and length in the conterminous United States and play important roles as spawning and rearing grounds for numerous species of anadromous fish. Stream temperature ...
  • Adaptation in marine invasion: a genetic perspective 
    Tepolt, Carolyn K. (2015)
    Genetic adaptation-heritable changes that alter an organism's performance-may facilitate invasion at several scales, but is seldom considered in predicting and managing marine invasions. However, a growing body of ...
  • Predator-mediated landscape structure: seasonal patterns of spatial expansion and prey control by Chrysaora quinquecirrha and Mnemiopsis leidyi 
    Breitburg, Denise L.; Burrell, Rebecca (2014)
    ABSTRACT: The scyphomedusa Chrysaora quinquecirrha and lobate ctenophore Mnemiopsis leidyi are dominant consumers in the planktivorous food web in Chesapeake Bay, USA, and are important predators throughout much of their ...

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