Don E Canfield
Affiliation: University of Southern Denmark
- Aquatic geomicrobiologyDonald E Canfield
Danish Center for Earth Science and Institute of Biology, University of Southern Denmark, Odense, Denmark
Adv Mar Biol 48:1-599. 2005
- Ocean productivity before about 1.9 Gyr ago limited by phosphorus adsorption onto iron oxidesChristian J Bjerrum
Danish Center for Earth System Science, Institute of Biology, University of Southern Denmark, Campusvej 55, DK 5230 Odense, Denmark
Nature 417:159-62. 2002....
- Calibration of sulfate levels in the archean oceanKirsten S Habicht
Danish Center for Earth System Science and Institute of Biology, University of Southern Denmark, Campusvej 55, DK 5230, Odense M, Denmark
Science 298:2372-4. 2002..Such low sulfate concentrations were maintained by volcanic outgassing of SO2 gas, and severely suppressed sulfate reduction rates allowed for a carbon cycle dominated by methanogenesis...
- Deposition and cycling of sulfur controls mercury accumulation in Isle Royale fishPaul E Drevnick
Department of Zoology, Miami University, Oxford, Ohio 45056, USA
Environ Sci Technol 41:7266-72. 2007..Therefore, reductions in anthropogenic sulfur emissions may provide a synergistic solution to the mercury problem in sulfate-limited freshwaters...
- Ferruginous conditions dominated later neoproterozoic deep-water chemistryDonald E Canfield
Nordic Center for Earth Evolution and Institute of Biology, Campusvej 55, University of Southern Denmark, 5230 Odense, Denmark
Science 321:949-52. 2008..These ferruginous conditions marked a return to ocean chemistry not seen for more than one billion years of Earth history...
- Sulfur isotopes in coal constrain the evolution of the Phanerozoic sulfur cycleDonald E Canfield
Institute of Biology and Nordic Center for Earth Evolution, University of Southern Denmark, 5230 Odense M, Denmark
Proc Natl Acad Sci U S A 110:8443-6. 2013..When applied to mass balance models, these results support previous interpretations of sulfur cycle operation and counter recent suggestions that sulfate has been a minor player in sulfur cycling through the Phanerozoic Eon...
- Early anaerobic metabolismsDon E Canfield
Nordic Centre for Earth Evolution NordCEE and Institute of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
Philos Trans R Soc Lond B Biol Sci 361:1819-34; discussion 1835-6. 2006..Conversely, an ecosystem based on oxygenic photosynthesis was also possible with complete removal of the oxygen by reaction with reduced species from the mantle...
- A cryptic sulfur cycle in oxygen-minimum-zone waters off the Chilean coastDon E Canfield
Institute of Biology and Nordic Center for Earth Evolution, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
Science 330:1375-8. 2010..This cryptic sulfur cycle is linked to anammox and other nitrogen cycling processes, suggesting that it may influence biogeochemical cycling in the global ocean...
- The evolution and future of Earth's nitrogen cycleDonald E Canfield
Institute of Biology and Nordic Center for Earth Evolution, University of Southern Denmark, Campusvej 55, Odense M, Denmark
Science 330:192-6. 2010....
- Animal evolution, bioturbation, and the sulfate concentration of the oceansDonald E Canfield
Nordic Center for Earth Evolution, and Institute of Biology, University of Southern Denmark, Odense M, Denmark
Proc Natl Acad Sci U S A 106:8123-7. 2009....
- Late-Neoproterozoic deep-ocean oxygenation and the rise of animal lifeDon E Canfield
Nordic Center for Earth Evolution NordCEE and Institute of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
Science 315:92-5. 2007..A prolonged stable oxic environment may have permitted the emergence of bilateral motile animals some 25 million years later...
- Vertical partitioning of nitrogen-loss processes across the oxic-anoxic interface of an oceanic oxygen minimum zoneLoreto De Brabandere
Nordic Center for Earth Evolution, Institute of Biology, University of Southern Denmark, Odense M, Denmark
Environ Microbiol 16:3041-54. 2014..Denitrification peaked deeper than anammox, likely reflecting a shift in the balance between this process and nitrate reduction to nitrite, governed by the relative availability of nitrate and nitrite...
- N2 production by the anammox reaction in the anoxic water column of Golfo Dulce, Costa RicaTage Dalsgaard
Department of Marine Ecology, National Environmental Research Institute, Vejlsøvej 25 PO Box 314, DK 8600 Silkeborg, Denmark
Nature 422:606-8. 2003..We therefore expect the anammox reaction to be a globally significant sink for oceanic nitrogen...
- Salinity responses of benthic microbial communities in a solar saltern (Eilat, Israel)Ketil Bernt Sørensen
Danish Center for Earth System Science, Institute of Biology, University of Southern Denmark, University of Odense, Odense, Denmark
Appl Environ Microbiol 70:1608-16. 2004..Unicellular and filamentous cyanobacteria metabolized at near-optimum rates at the in situ salinity, whereas the optimum salinity for anoxygenic phototrophs was between 100 and 120 per thousand...
- The transition to a sulphidic ocean approximately 1.84 billion years agoSimon W Poulton
Danish Center for Earth System Science, Institute of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
Nature 431:173-7. 2004..Sulphidic conditions may have persisted until a second major rise in oxygen between 0.8 to 0.58 Gyr ago, possibly reducing global rates of primary production and arresting the pace of algal evolution...
- Comment on "Physical model for the decay and preservation of marine organic carbon"Bernard P Boudreau
Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada
Science 319:1616; author reply 1616. 2008..Alternative models provide equally good fit to the observed temporal trend in decay rate constants...
- Anaerobic ammonium oxidation (anammox) in the marine environmentTage Dalsgaard
National Environmental Research Institute, Department of Marine Ecology, Vejlsøvej 25, P O Box 314, 8600 Silkeborg, Denmark
Res Microbiol 156:457-64. 2005..The process has now been found in a range of environments including marine sediments, sea ice and anoxic water columns, and it may be responsible for up to 50% of the global removal of fixed nitrogen from the oceans...
- Effect of low sulfate concentrations on lactate oxidation and isotope fractionation during sulfate reduction by Archaeoglobus fulgidus strain ZKirsten S Habicht
Danish Center of Earth System Science, University of Southern Denmark, Institute of Biology, Campusvej 55, DK 5230 Odense M, Denmark
Appl Environ Microbiol 71:3770-7. 2005..This could explain the shift in the metabolic pathway and the reduced growth yield and isotope fractionation at low sulfate levels...
- Active microbial sulfur disproportionation in the MesoproterozoicDavid T Johnston
Department of Geology and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20742, USA
Science 310:1477-9. 2005..These measurements imply that sulfur compound disproportionation was an active part of the sulfur cycle by 1300 Ma and that progressive Earth surface oxygenation may have characterized the Mesoproterozoic...
- Community composition of a hypersaline endoevaporitic microbial matKetil Bernt Sørensen
Department of Geology and Geophysics Post 701, 1680 East west Rd, University of Hawaii, Honolulu, HI 96822, USA
Appl Environ Microbiol 71:7352-65. 2005..Detected archaeal groups included organisms affiliated with the Methanosarcinales, the Halobacteriales, and uncultured groups of Euryarchaeota...