David  Myrold
David Myrold
Professor, Soil Microbiology, Forest Soils

Research projects are on N dynamics in forest ecosystems; use of stable isotopes for quantifying N cycle processes; ecology of Frankia in soil; functional diversity of soil microbial communities.

OSU Campus
Department of Crop and Soil Science
3127 Ag & Life Sciences Building
Corvallis, OR 97331
United States
(541) 737-5737


Classes Taught

I accept graduate students for Soil Science, Forest Science, or Microbiology.



Ph.D. 1984 Michigan State University, Microbiology
M.S. 1979 Washington State University, Soil science
B.S. 1977 Michigan Technological University, Forestry

Professional Experience:

1995-present: Professor, Department of Crop and Soil Science, Oregon State University
1989-1995: Associate professor, Department of Soil Science, Oregon State University
1984-1989: Assistant professor, Department of Soil Science, Oregon State University

Other Professional Experience

2011-present: Editorial Board, ISME Journal
2008-present: Editor, Soil Science Society of America Journal
2006-present: Editorial Board, FEMS Microbiology Ecology
2005-present: Subject Editor, Soil Biology & Biochemistry
2000: Visiting professor, Swedish University of Agricultural Sciences, Umeå, Sweden
1991-1992: Visiting assoc. prof., Department of Plant Physiology, University of Umeå, Umeå, Sweden


I accept graduate students for Crop and Soil Science


Journal Articles (2011-present)

Nesme, J., W. Achouak, S.N. Agathos, M. Bailey, P. Baldrian, D. Brunel, Å. Frostegård, T. Heulin, J.K. Jansson, E. Jurkevitch, K. Kruus, G.A. Kowalchuk, A. Lagares, H. Lappin-Scott, P. Lemanceau, D. Le Paslier, I. Mandic-Mulec, J.C. Murrell, D.D. Myrold, R. Nalin, P. Nannipieri, J.D. Neufeld , F. O’Gara, J.J. Parnell, A. Pühler, V. Pylro, J.L. Ramos, L.F.W. Roesch, M. Schloter, C. Schleper, A. Sczyrba, A. Sessitsch, S. Sjöling, J. Sørensen, S.J. Sørensen, C. Tebbe, E. Topp,  G. Tsiamis, J.D. van Elsas, G. van Keulen, F. Widmer, M. Wagner, T. Zhang, X. Zhang, L. Zhao, Y.-G. Zhu, T.M. Vogel, and P. Simonet. 2016. Back to the future of soil metagenomics. Front. Microbiol. 7:73. (doi:10.3389/fmicb.2016.00073)

Intanon, S., A.G. Hulting, D.D. Myrold, and C.A. Mallory-Smith. 2015. Short-term effects of soil amendment with meadowfoam seed meal on soil microbial composition and function. Appl. Soil Ecol. 89:85-92. (doi:10.1016/j.apsoil.2015.01.009)

Taylor, A.E., K. Taylor, B. Tennigkeit, M. Palatinszky, M. Stieglmeier, D.D. Myrold, C. Schleper, M. Wagner, and P.J. Bottomley. 2015. Comparison of inhibitory properties of C2 – C10 1-alkynes on ammonia oxidation in two Nitrososphaera species. Appl. Environ. Microbiol. 81:1942-1948. (doi:10.1128/AEM.03688-14)

Lu, X., P.J. Bottomley, and D.D. Myrold. 2015. Contributions of ammonia-oxidizing archaea and bacteria to nitrification in Oregon forest soils. Soil Biol. Biochem. 85:54-62. (doi:10.1016/j.soilbio.2015.02.034)

Giguere, A., A.E. Taylor, D.D. Myrold, and P.J. Bottomley. 2015. Nitrification responses of soil ammonia-oxidizing archaea and bacteria to ammonium concentrations. Soil Sci. Soc. Am. J. 79:1366-1374. (doi:10.2136/sssaj2015.03.0107) 

Myrold, D.D., L.H. Zeglin, and J.K Jansson. 2014. The potential of metagenomic, and other omic, approaches for understanding soil microbial processes. Soil Sci. Soc. Am. J. 78:3-10. (doi:10.2136/sssaj2013.07.0287dgs)

Högberg, M.N., S.A. Yarwood, and D.D. Myrold. 2014. Responses of fungal and bacterial community composition to N in natural and experimental boreal forest. Soil Biol. Biochem. 72:35-43. (doi:10.1016/j.soilbio.2014.01.014)

Davies, N., D. Field, L. Amaral-Zettler, M.S. Clark, J. Deck, A. Drummond, D.P. Faith, J. Geller, J. Gilbert, F.O. Glöckner, P. Hirsch, J.-A. Leong, C. Meyer, M. Obst, S. Planes, C. Scholin, A.P. Vogler, R.D. Gates, R. Toonen, V. Berteaux-Lecellier, M. Barbier, K. Barker, S. Bertilsson, M. Bicak, M.J. Bietz, J. Bobe, L. Bodrossy, A. Borja, J. Coddington, J. Fuhrman, G. Gerdts, R. Gillespie, K. Goodwin, P.C. Hanson, J.-M. Hero, D. Hoekman, J. Jansson, C. Jeanthon, R. Kao, A. Klindworth, R. Knight, R. Kottmann, M.S. Koo, G. Kotoulas, A.J. Lowe, V.T. Marteinsson, F.Meyer, N. Morrison, D.D. Myrold, E. Pafilis, S. Parker, J.J. Parnell, P.N. Polymenako, S. Ratnasingham, G.K. Roderick, N. Rodriguez-Ezpeleta, K. Schonrogge, N. Simon, N.J. Valette-Silver, Y. Springer, G.N. Stone, S. Stones-Havas, S.-A Sansone, K.M. Thibault, P. Wecker, A. Wichels, J.C. Wooley, T. Yahara, A. Zingone, and GOs-COS. 2014. The founding charter of the Genomic Observatories Network. GigaScience 3:2.  (doi:10.1186/2047-217X-3-2)

McGinnis, M.L., S.M. Holub and D.D. Myrold. 2014. Regional assessment of soil microbial functional diversity of Douglas-fir forests. Soil Sci. Soc. Am. J. 78:S125-S135. (doi:10.2136/sssaj2013.08.0349)

Hiltbrunner, E., Aerts, R., Bühlmann, T., Huss-Danell, K., Magnusson, B., Myrold, D.D., Reed, S.C., Sigurdsson, B.D., and Körner, C. 2014. Ecological consequences of the expansion of N2-fixing plants in cold biomes. Oecologia 176:11-24. (doi: 10.1007/s00442-014-2991-x)

Kaiser, M., T.A. Ghezzehei, M. Kleber, D.D. Myrold, and A.A. Berhe. 2014. Influence of calcium carbonate and charcoal applications on organic matter storage in silt-sized aggregates formed during a microcosm experiment. Soil Sci. Soc. Am. J. 78:1624–1631. (doi:10.2136/sssaj2014.04.0146)

Prestat, E., M.M. David, J. Hultman, N. Tas, R. Lamendella, J. Dvornik, R. Mackelprang, D.D. Myrold, A. Jumpponen, S. Tringe, E. Holman, K. Mavromatis, and J.K. Jansson. 2014. FOAM: Functional Ontology Assignments for Metagenomes: a Hidden Markov Model (HMM) database with environmental focus. Nucl. Acids Res. 42:e145. (doi: 10.1093/nar/gku702)

Yarwood, S.A., E.A. Brewer, R.R. Yarwood, K. Lajtha, and D.D. Myrold. 2013. The persistence of soil microbes: active community composition and capability to respond to litter addition after 12 years of no inputs. Appl. Environ. Microbiol. 79:1385-1392. (doi: 10.1128/AEM.03181-12) 

Zeglin, L.H., L.A. Kluber, and D.D. Myrold. 2013. The importance of amino sugar turnover to C and N cycling in organic horizons of old-growth Douglas-fir forest soils colonized by ectomycorrhizal mats. Biogeochem. 112:679-693. (doi: 10.1007/s10533-012-9746-8); Erratum (doi: 10.1007/s10533-012-9777-1) 

Zeglin, L.H., and D.D. Myrold. 2013. Fate of decomposed fungal cell wall material in organic horizons of old-growth Douglas-fir forest soils. Soil Sci. Soc. Am. J. 77:489-500. (doi: 10.2136/sssaj2012.0204) 

Taylor, A.E., Vajrala, N., Giguere, A.T., Gitelman, A.I.,. Arp, D.J., Myrold, D.D., Sayavedra-Soto, L., and Bottomley, P.J. 2013. Use of aliphatic n-alkynes to discriminate soil nitrification activities of ammonia-oxidizing thaumarchaea and bacteria. Appl. Environ. Microbiol. 79:6544-6551. (doi: 10.1128/AEM.01928-13) 

Zeglin, L.H., P.J. Bottomley, A. Jumpponen, C.W. Rice, M. Arango, A. Lindsley, A. McGowan, P. Mfompeb, and D.D. Myrold. 2013. Altered precipitation regime affects the function and composition of soil microbial communities on multiple time scales. Ecology 94:2334-2345. (doi: org/10.1890/12-2018.1) 

Kageyama, S.A., N.J. Posavatz, S.S. Jones, P.J. Bottomley, K. Cromack, Jr., and D.D. Myrold. 2013. Effects of disturbance scale on microbial communities in the Western Cascades of Oregon. Plant Soil 372:459-471. (doi: 10.1007/s11104-013-1760-7) 

Hanzel, J., D. Myrold, A. Sessitsch, K. Smalla, C.C. Tebbe, and K.U. Totsche. 2013. Microbial ecology of biogeochemical interfaces—diversity, structure, and function of microhabitats in soil. FEMS Microbiol. Ecol. 86: 1-2. (doi: 10.1111/1574-6941.12194)

Bottomley, P.J., D.D. Myrold, and Taylor, A.E. 2012. A consideration of the relative contributions of different microbial subpopulations to the soil N cycle. Front. Microbiol. 3:373. (doi:10.3389/fmicb.2012.00373)

Taylor, A.E., L.H. Zeglin, T.A. Wanzek, D.D. Myrold, and P.J. Bottomley. 2012. Dynamics of ammonia oxidizing archaea and bacteria populations and contributions to soil nitrification potentials. ISME J . 6:2024-2032 (doi: 10.1038/ismej.2012.51)

Keiluweit, M., J.J. Bougoure, L.H. Zeglin, D.D. Myrold, P.K. Weber, M. Kleber, J. Pett-Ridge, and P.S. Nico. 2012. Nano-scale investigation of the association of microbial nitrogen residues with iron (hydr)oxides in a forest soil O-horizon. Geochim. Cosmochim. Acta 95:213-226. (doi: 10.1016/j.gca.2012.07.001)

González-Pinzón, R., R. Haggerty, and D.D. Myrold. 2012. Measuring aerobic respiration in stream ecosystems using the resazurin-resorufin system. J. Geophys. Res. 117:G00N06. (doi: 10.1029/2012JG001965)

Zeglin, L.H., A.E. Taylor, D.D. Myrold, and P.J. Bottomley. 2011. Bacterial and archaeal amoA gene distribution covaries with soil nitrification properties across a range of land uses. Environ. Microbiol. Rep. 3:717-726. (doi 10.1111/j.1758-2229.2011.00290.x)

Kluber, L.A., J.E. Smith, and D.D. Myrold. 2011. Distinctive fungal and bacterial communities are associated with mats formed by ectomycorrhizal fungi. Soil Biol. Biochem. 43:1042-1050. (doi:10.1016/j.soilbio.2011.01.022)

Högberg, P., C. Johannisson, S.A. Yarwood, I. Callesen, F. Näsholm, D.D. Myrold, and M.N. Högberg. 2011. Recovery of ectomycorrhiza after ‘nitrogen saturation’ of conifer forest. New Phytol. 189: 515–525. (doi: 10.1111/j.1469-8137.2010.03485.x)

Journal Articles(2006-2011)

Chaia, E.E., and DD. Myrold. 2010. Variation of 15N natural abundance in leaves and nodules of actinorhizal shrubs in Northwest Patagonia. Symbiosis 50:97-105.

Kluber, L.A., K.M. Tinnesand, B.A. Caldwell, S.M. Dunham, R.R. Yarwood, P.J. Bottomley, and D.D. Myrold. 2010. Ectomycorrhizal mats alter forest soil biogeochemistry. Soil Biol. Biochem. 42:1607-1613.

Taylor, A.E., L.H. Zeglin, S. Dooley, D.D. Myrold, and P.J. Bottomley. 2010. Evidence for different contributions of archaea and bacteria to the ammonia-oxidizing potential of diverse Oregon soils. Appl. Environ. Microbiol. 76:7691-7698.

Yarwood, S.A., P.J. Bottomley, and D.D. Myrold. 2010. Soil microbial communities associated with Douglas-fir and red alder stands at high- and low-productivity forest sites in Oregon, USA. Microb. Ecol. 60:606-617.

Yarwood, S.A., D.D. Myrold, and M.N. Högberg. 2009. Termination of the tree belowground C allocation alters soil fungal and bacterial communities in a boreal forest. FEMS Microbiol. Ecol. 70:151-162.

Khan, A., D.D. Myrold, and A.K. Misra. 2009. Molecular diversity of Frankia from root nodules of Hippophae salicifolia (D.Don) found in Sikkim. Indian J. Microbiol. 49:196-200.

Chaer, G.M., M.F. Fernandes, D.D. Myrold, and P.J. Bottomley. 2009. Comparative resistance and resilience of soil microbial communities and enzyme activities in adjacent native forest and agricultural soils. Microb. Ecol. 58:414-424.

Anderson, M.D., R.W. Ruess, D.D. Myrold, and D.L. Taylor. 2009. Host species and habitat affect nodulation by specific Frankia genotypes in two species of Alnus in interior Alaska. Oecologia 160:619-630.

Chaer, G.M., M.F. Fernandes, D.D. Myrold, and P.J. Bottomley. 2009. Shifts in microbial community composition and physiological profiles across a gradient of induced soil degradation. Soil Sci. Soc. Am. J. 73:1327-1334.

Chaer, G.M., D.D. Myrold, and P.J. Bottomley. 2009. A soil quality index based on the equilibrium between soil organic matter and biochemical properties of undisturbed coniferous forest soils of the Pacific Northwest. Soil Biol. Biochem. 41:822-830.

Boyle-Yarwood, S.A., P.J. Bottomley, and D.D. Myrold. 2008. Community composition of ammonia-oxidizing bacteria and archaea in soils under stands of red alder and Douglas-fir in Oregon. Environ. Microbiol. 10:2956-2965.

Davis, J.H., S.M. Griffith, W.R. Horwath, J.J. Steiner, and D.D. Myrold. 2008. Denitrification and nitrate consumption in an herbaceous riparian area and perennial ryegrass seed cropping system. Soil Sci. Soc. Am. J. 72:1299-1310.

Kageyama, S.A., N. Ritchie Posavatz, K.E. Waterstripe, S.J. Jones, P.J. Bottomley, K. Cromack, Jr. and D.D. Myrold. 2008. Fungal and bacterial communities across meadow/forest transects in the Western Cascades of Oregon. Can. J. For. Res. 38:1053-1060.

Moore-Kucera, J., A.N. Azarenko, L. Brutcher, A. Chozinski, D.D. Myrold, and R. Ingham. 2008. In search of key soil functions to assess soil community management for sustainable sweet cherry orchards. Hortsci. 43:38-44.

Boyle, S.A., R.R. Yarwood, P.J. Bottomley, and D.D. Myrold. 2008. Bacterial and fungal contributions to soil nitrogen cycling under Douglas fir and red alder at two sites in Oregon. Soil Biol. Biochem. 40:443-451.

Davis, J.H., S.M. Griffith, W.R. Horwath, J.J. Steiner, and D.D. Myrold. 2007. Mitigation of shallow groundwater nitrate in a poorly drained riparian area and adjacent cropland. J. Environ. Qual. 36:628-637.

Khan, A., D.D. Myrold, and A.K. Misra. 2007. Distribution of Frankia genotypes of Alnus nepalensis with respect to altitude and soil characteristics in the Sikkim Himalayas. Physiol. Plant. 130:364–371.

Myrold, D.D. 2007. Recent advances in soil nitrogen cycling and microbial community analysis. Korean J. Soil Sci. and Fertilizers 40:5-9.

Myrold, D.D., and N.J. Ritchie Posavatz. 2007. Potential importance of bacteria and fungi in nitrate assimilation in soil. Soil Biol. Biochem. 39:1737-1743.

Högberg, M.N., P. Högberg, and D.D. Myrold. 2007. Is microbial community composition in boreal forest soils determined by pH, C-to-N ratio, the trees, or all three? Oecologia 150:590-601.

Cliff, J.B., P.J. Bottomley, D.J., Gaspar, and D.D. Myrold. 2007. Nitrogen mineralization and assimilation at millimeter scales. Soil Biol. Biochem. 39:823-826.

Williams, M.A., D.D. Myrold, and P.J. Bottomley. 2007. Carbon flow from 13C-labeled clover and ryegrass residues into a residue-associated microbial community under field conditions. Soil Biol. Biochem. 39:819-822.

Wallenstein, M.D., D.D. Myrold, M. Firestone, and M. Voytek. 2006. Environmental controls on denitrifying communities and denitrification rates: Insights from molecular methods. Ecol. Applic. 16:2143-2152.

Bottomley, P.J., R.R. Yarwood, S.A. Kageyama, K.E. Waterstripe, M.A. Williams, K. Cromack, Jr., and D.D. Myrold. 2006. Responses of soil bacterial and fungal communities to reciprocal transfers of soil between adjacent coniferous forest and meadow vegetation in the Cascade Mountains of Oregon. Plant Soil 289:35-45.

Brant, J.B., E.W. Sulzman, and D.D. Myrold. 2006. Microbial community utilization of added carbon substrates in response to long-term carbon input manipulation. Soil Biol. Biochem. 38:2219–2232.

Brant, J.B., D.D. Myrold, and E.W. Sulzman. 2006. Root controls on soil microbial community structure in forest soils. Oecologia 148:650-659.

Williams, M.A., D.D. Myrold, and P.J. Bottomley. 2006. Distribution and fate of 13C-labeled root and straw residues from ryegrass and crimson clover in soil under western Oregon field conditions. Biol. Fertil. Soils 42:523–531.

Boyle, S.A., J.J. Rich, P.J. Bottomley, K. Cromack, Jr., and D.D. Myrold. 2006. Reciprocal transfer effects on denitrifying community composition and activity at forest and meadow sites in the Cascade Mountains of Oregon. Soil Biol. Biochem. 38:870-878.

Davis, J.M., S.M. Griffith, W. Horwath, J.J. Steiner, and D.D. Myrold. 2006. Fate of nitrogen-15 in a perennial ryegrass seed field and herbaceous riparian area. Soil Sci. Soc. Am. J. 70:909-919.

Williams, M.A., D.D. Myrold, and P.J. Bottomley. 2006. Carbon flow from 13C-labeled straw and root residues into the phospholipids fatty acids of a soil microbial community under field conditions. Soil Biol. Biochem. 38:759-768.

Högberg, M.N., D.D. Myrold, R. Giesler, and P. Högberg. 2006. Contrasting patterns of soil N cycling in model ecosystems of Fennoscandian boreal forests. Oecologia 147:96-107.

Book Chapters (2011-present)

Bottomley, P.J., and D.D. Myrold. 2015. Biological nitrogen fixation: The return of N to the soil. p. 447-470. In Soil Microbiology, Ecology, and Biochemistry, 4th Edition (E.A. Paul, ed.). Academic Press, San Diego, CA.

Myrold, D.D., and P. Nannipieri. 2014. Classical techniques versus omics approaches. p. 179-187. In Omics in Soil Science (P. Nannipieri, G. Pietramellara, and G. Renella, eds.). Caister Academic Press, Hethersett, UK.

Myrold, D.D., J. Pett-Ridge, and P.J. Bottomley. 2011. Nitrogen mineralization and assimilation at millimeter scales. p. 91-114. In Research on Nitrification and Related Processes, Part B (M.G. Klotz and L.Y. Stein, eds.) Methods in Enzymology, Vol. 496. Elsevier, Inc., Academic Press, Burlington.

Book Chapters 2006-2010

Cole, J.R., D.D. Myrold, C.H. Nakatsu, P.R. Owens, G. Kowalchuk, C. Tebbe, and J.M. Tiedje. 2010. Development of soil metadata standards for international DNA sequence databases. p.5-8. In Proceedings of the 19th World Congress of Soil Science, Soil Solutions for a Changing World (R.J. Gilkes and N. Prakongkep, eds.). Published on DVD, http://www.iuss.org, Symposium 2.3.2: Gene expression and proteomics in soil, 2010 Aug 1-6. Brisbane, Australia: IUSS. (ISBN 978-0-646-53783-2)

Myrold, D.D., and P.J. Bottomley. 2008. Nitrogen mineralization and immobilization. p. 157-172. In Nitrogen in Agricultural Soils (W. Raun and J.S. Schepers, eds.). American Society of Agronomy, Madison, WI.

Myrold, D.D., P.J. Bottomley, M.N. Högberg, P. Högberg, and E.W. Sulzman. 2007. Linking microbial communities to activity in soil with molecular and stable isotope techniques. p. 85-86. In Linking Management to Global Climate Challenges: The Proceedings of the International Symposium on Forest Soils and Ecosystem Health (Z. Xu, C.E. Johnson, C. Chen, and T.J. Blumfield, eds.). Centre for Forestry and Horticulture Research, Griffith University, Brisbane, Australia. (ISBN 978-1-921291-16-6)

Myrold, D.D. 2007. Quantification of nitrogen transformations. p. 687-696. In Manual of Environmental Microbiology, 3rd Edition (C.J. Hurst, R.L. Crawford, J.L. Garland, D.A. Lipson, A.L. Mills, and L.D. Stetzenbach, eds.). ASM Press, Washington, DC.

Drury, C.F., D.D. Myrold, E.G. Beauchamp, and W.D. Reynolds. 2007. Denitrification techniques for soils. p. 471-493. In Soil Sampling and Methods of Analysis, 2nd Edition (M.R. Carter and E.G. Gregorich, eds.). CRC Press, Taylor & Francis Group, Boca Raton, FL.

Bottomley, P.J., and D.D. Myrold. 2007. Biological nitrogen fixation: The return of N to the soil. p. 365-387. In Soil Microbiology, Ecology, and Biochemistry, 3rd Edition (E.A. Paul, ed.). Academic Press, Burlington, MA.