Postdoc Research Associate
Postdoc Research Associate


Robert (Bob) Danczak studies the dynamics of natural organic matter across ecosystem types, integrates microbiological and natural organic matter data, and develops novel ecological tools for the Subsurface Research project. He has extensive research expertise in microbial ecology, metagenomics, bioinformatics, cheminformatics, and biogeochemistry. 

Research Interest

  • Evaluating the ecological processes that impact microbial communities within and across scales.
  • Combining various omics techniques to derive new understanding of biogeochemical processes.
  • Applying ecological theory to better understand how assemblages of molecular formulas develop in natural environments.


  • PhD in Microbiology, The Ohio State University, 2018
  • BA in Biology and Biochemistry, Hiram College, 2013

Awards and Recognitions

  • Outstanding Performance Award, Earth and Biological Sciences Directorate, PNNL (2020)



  • Danczak RE, RA Daly, MA Borton, JC Stegen, S Roux, KC Wrighton, et al. 2020. “Ecological Assembly Processes Are Coordinated between Bacterial and Viral Communities in Fractured Shale Ecosystems.” mSystems DOI: 10.1128/mSystems.00098-20
  • Toyoda JG, AE Goldman, RK Chu, RE Danczak, RA Daly, et al. 2020. “WHONDRS Summer 2019 Sampling Campaign: Global River Corridor Surface Water FTICR-MS and Stable Isotopes. Environmental System Science Data Infrastructure for a Virtual Ecosystem; Worldwide Hydrobiogeochemistry Observation Network for Dynamic River Systems (WHONDRS) DOI: 10.15485/1603775
  • Danczak RE, AE Goldman, RK Chu, JG Toyoda, VA Garayburu-Caruso, et al. 2020. “Ecological theory applied to environmental metabolomes reveals compositional divergence despite conserved molecular properties.” bioRxiv DOI: 10.1101/2020.02.12.946459
  • Danczak RE, RK Chu, SJ Fansler, AE Goldman, EB Graham, MM Tfaily, et al. 2020. ”Unification of Environmental Metabolomics with Metacommunity Ecology.” bioRxiv DOI: 10.1101/2020.01.31.929364


  • Danczak RE, Johnston MD, Kenah C, Slattery M, Wilkins MJ. “Capability for arsenic mobilization in groundwater is distributed across broad phylogenetic lineages.” PloS one DOI: 10.1371/journal.pone.0221694


  • Danczak RE, Johnston MD, Kenah C, Slattery M, Wilkins MJ. “Microbial cohesion mediates community turnover in unperturbed aquifers.” mSystems DOI: 10.1128/mSystems.00066-18