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Dr. Emma J. Rosi

Aquatic Ecologist | PhD, University of Georgia

Expertise
freshwater, invasive species, human impacts

845 677-7600 x232

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Emma Rosi is advancing our understanding of how land use, urbanization, and climate change shape freshwater ecosystems, with projects exploring environmental contaminants such as pharmaceutical and personal care products, aging wastewater infrastructure, environmental implications of agricultural GMOs, and the effects of dams.

Rosi directs the Baltimore Ecosystem Study (BES), a National Science Foundation Long Term Ecological Research site. As part of BES, Rosi is exploring the role that failing wastewater infrastructure plays in polluting streams and creating antibiotic-resistant ‘superbugs’. She is also revealing how prescription and illicit drugs that enter our waterways impact freshwater quality and aquatic life.

In addition to her work on human-driven threats to freshwaters, Rosi co-leads a long-term project, in collaboration with Yale University, investigating how wildebeest and hippos shape the food web in the Kenyan reach of Africa’s Mara River.

Rosi is a leader in the field of freshwater science and has conducted research on the role of  emerging contaminants shaping these systems.  Rosi serves on the  US Environmental Protection Agency’s Science Advisory Board and her research has implications for our understanding of anthropogenic stressors on freshwater ecosystems. 
 
Fate of Environmental Proteins (eProteins) from Genetically Engineered Crops in Streams is Controlled by Water pH and Ecosystem Metabolism
Brandão-Dias, Pedro F. P., Emma J. Rosi, Arial Shogren, Jennifer L. Tank, David T. Fischer, and Scott P. Egan. 2021. “Fate of Environmental Proteins (eProteins) from Genetically Engineered Crops in Streams Is Controlled by Water PH and Ecosystem Metabolism”. Environmental Science & Technology 55 (8). American Chemical Society (ACS): 4688-97. doi:10.1021/acs.est.0c05731.
Exposure to a common antidepressant alters crayfish behavior and has potential subsequent ecosystem impacts
Reisinger, Alexander J., Lindsey S. Reisinger, Erinn K. Richmond, and Emma J. Rosi. 2021. “Exposure to a Common Antidepressant Alters Crayfish Behavior and Has Potential Subsequent Ecosystem Impacts”. Ecosphere 12 (6). Wiley. doi:10.1002/ecs2.3527.
A century of change: Reconstructing the biogeochemical history of Hubbard Brook
Likens, Gene E., Donald C. Buso, Emily S. Bernhardt, and Emma J. Rosi. 2021. “A Century of Change: Reconstructing the Biogeochemical History of Hubbard Brook”. Hydrological Processes 35 (6). Wiley. doi:10.1002/hyp.14256.
Predicting high-frequency variation in stream solute concentrations with water quality sensors and machine learning
Green, M. B., L. H. Pardo, S. W. Bailey, J. L. Campbell, W. H. McDowell, E. S. Bernhardt, and Emma J. Rosi. 2020. “Predicting High-Frequency Variation in Stream Solute Concentrations With Water Quality Sensors and Machine Learning”. Hydrological Processes.
Nutrients and Pharmaceuticals Structure Bacterial Core Communities in Urban and Montane Stream Biofilms
Ogata, E. M., M. A. Baker, Emma J. Rosi, T. B. Smart, D. Long, and Z. T. Aanderud. (2025) 2020. “Nutrients and Pharmaceuticals Structure Bacterial Core Communities in Urban and Montane Stream Biofilms”. Frontiers in Microbiology 11.
Theoretical Perspectives of the Baltimore Ecosystem Study: Conceptual Evolution in a Social-Ecological Research Project
Pickett, Steward T. A., M. L. Cadenasso, M. E. Baker, L. E. Band, C. G. Boone, G. L. Buckley, Peter M. Groffman, et al. (2025) 2020. “Theoretical Perspectives of the Baltimore Ecosystem Study: Conceptual Evolution in a Social-Ecological Research Project”. Bioscience 70 (4): 297-314+.
Towards more realistic estimates of DOM decay in streams: Incubation methods, light, and non-additive effects
Kelso, Julia E., Emma J. Rosi, and Michelle A. Baker. 2020. “Towards More Realistic Estimates of DOM Decay in Streams: Incubation Methods, Light, and Non-Additive Effects”. Freshwater Science 39 (3). University of Chicago Press: 559-75. doi:10.1086/710218.
Urban ecology as an integrative science and practice.
Pickett, Steward T. A., Morgan Grove, Shannon L. LaDeau, Emma J. Rosi, and Mary L. Cadenasso. 2020. “Urban Ecology As an Integrative Science and Practice”. In Urban Ecology: Its Nature and Challenges, 122-43. CABI. doi:10.1079/9781789242607.0122.
A River of Bones: Wildebeest Skeletons Leave a Legacy of Mass Mortality in the Mara River, Kenya
Subalusky, Amanda L., Christopher L. Dutton, Emma J. Rosi, Linda M. Puth, and David M. Post. 2020. “A River of Bones: Wildebeest Skeletons Leave a Legacy of Mass Mortality in the Mara River, Kenya”. Frontiers in Ecology and Evolution 8. Frontiers Media SA. doi:10.3389/fevo.2020.00031.
Food web controls on mercury fluxes and fate in the Colorado River, Grand Canyon
Walters, D. M., W.F. Cross, T.A. Kennedy, C.V. Baxter, R.O. Hall, and Emma J. Rosi. 2020. “Food Web Controls on Mercury Fluxes and Fate in the Colorado River, Grand Canyon”. Science Advances 6 (20). American Association for the Advancement of Science (AAAS): eaaz4880. doi:10.1126/sciadv.aaz4880.

Current Projects