Dr. Emma J. Rosi

Aquatic Ecologist | PhD, University of Georgia

Expertise
freshwater, invasive species, human impacts

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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. 
 
A review of allochthonous organic matter dynamics and metabolism in streams
Tank, J.L., Emma J. Rosi-Marshall, N.A. Griffiths, S.A. Entrekin, and M.L. Stephen. 2010. “A Review Of Allochthonous Organic Matter Dynamics And Metabolism In Streams”. J. N. Am. Benthol. Soc. 29: 118-146. http://www.caryinstitute.org/reprints/Tank_2010_JNABS.pdf.
The role of federal agencies in the application of scientific knowledge
Pouyat, Richard V., Kathleen C. Weathers, Richard Haeuber, Gary M. Lovett, A.M. Bartuska, Lynn M. Christenson, Stuart E. G. Findlay, et al. 2010. “The Role Of Federal Agencies In The Application Of Scientific Knowledge”. Front. Ecol. Environ. 8: 322-328.
Seasonal variation in nutrient limitation of microbial biofilms colonizing organic and inorganic substrata in streams
Hoellein, T.J., J.L. Tank, John J. Kelly, and Emma J. Rosi-Marshall. 2010. “Seasonal Variation In Nutrient Limitation Of Microbial Biofilms Colonizing Organic And Inorganic Substrata In Streams”. Hydrobiologia 649: 331-345.
Short-term effects of the 2008 high-flow experiment on macroinvertebrates in the Colorado River below Glen Canyon Dam, Arizona
Rosi-Marshall, Emma J., Theodore A. Kennedy, Dustin W. Kincaid, Wyatt F. Cross, H.A.W. Kelly, Kathrine E. Behn, T. White, Robert O. Hall, and Colden V. Baxter. 2010. “Short-Term Effects Of The 2008 High-Flow Experiment On Macroinvertebrates In The Colorado River Below Glen Canyon Dam, Arizona”. U.S. Geological Survey Open-File Report 2010-1031.
Invasion and production of New Zealand mud snails in the Colorado River, Glen Canyon
Cross, Wyatt F., Emma J. Rosi-Marshall, Kathrine E. Behn, Theodore A. Kennedy, Robert O. Hall, A.E. Fuller, and Colden V. Baxter. 2010. “Invasion And Production Of New Zealand Mud Snails In The Colorado River, Glen Canyon”. Biol. Invasions 12: 3033-3043. doi:10.1007/s10530-010-9694-y.
Occurrence of maize detritus and a transgenic insecticidal protein (Cry1Ab) within the stream network of an agricultural landscape
Tank, J.L., Emma J. Rosi-Marshall, Todd V. Royer, M.R. Whiles, N.A. Griffiths, T.C. Frauendorf, and D.J. Treering. 2010. “Occurrence Of Maize Detritus And A Transgenic Insecticidal Protein (Cry1Ab) Within The Stream Network Of An Agricultural Landscape”. Proc. Nat. Acad. Sci. 107: 17645-17650. doi:10.1073/pnas.1006925107.
Dissolved organic carbon in streams from artificially drained and intensively farmed watersheds in Indiana, USA
Warrner, T. J., Todd V. Royer, J.L. Tank, N.A. Griffiths, Emma J. Rosi-Marshall, and M.R. Whiles. 2009. “Dissolved Organic Carbon In Streams From Artificially Drained And Intensively Farmed Watersheds In Indiana, Usa”. Biogeochemistry 95: 295-307.
Microbial respiration and decomposition of conventional and genetically-engineered corn detritus in Midwestern US agricultural streams
Griffiths, N.A., J.L. Tank, Todd V. Royer, C.P. Chambers, M.A. Evans-White, T.C. Frauendorf, Emma J. Rosi-Marshall, and M.R. Whiles. 2009. “Microbial Respiration And Decomposition Of Conventional And Genetically-Engineered Corn Detritus In Midwestern Us Agricultural Streams”. Ecol. Appl. 19: 133-142.
Rapid decomposition of maize detritus in agricultural headwater streams
Griffiths, N.A., J.L. Tank, Todd V. Royer, Emma J. Rosi-Marshall, M.R. Whiles, C.P. Chambers, T.C. Frauendorf, and M.A. Evans-White. 2009. “Rapid Decomposition Of Maize Detritus In Agricultural Headwater Streams”. Ecological Applications 19 (1): 133 - 142. doi:10.1890/07-1876.1.
Response of secondary production by macroinvertebrates to large wood addition in three Michigan streams
Entrekin, S.A., J.L. Tank, Emma J. Rosi-Marshall, T.J. Hoellein, and G.A. Lamberti. 2009. “Response Of Secondary Production By Macroinvertebrates To Large Wood Addition In Three Michigan Streams”. Freshwater Biol. 54: 1741-1758.
Temporal variation of substratum-specific rates of N uptake and metabolism and their relative contribution at the stream-reach scale
Hoellein, T.J., J.L. Tank, Emma J. Rosi-Marshall, and S.A. Entrekin. 2009. “Temporal Variation Of Substratum-Specific Rates Of N Uptake And Metabolism And Their Relative Contribution At The Stream-Reach Scale”. J. N. Am. Benthol. Soc. 28: 305-318.
Are Rivers Just Big Streams? A pulse method to quantify nitrogen demand in a large river
Tank, J.L., Emma J. Rosi-Marshall, M. A. Baker, and Robert O. Hall. 2008. “Are Rivers Just Big Streams? A Pulse Method To Quantify Nitrogen Demand In A Large River”. Ecology 89 (10): 2935 - 2945. doi:10.1890/07-1315.1.
Coarse particulate organic matter transport in low-gradient streams of the Upper Peninsula of Michigan
Cordova, Jean M., Emma J. Rosi-Marshall, J.L. Tank, and G.A. Lamberti. 2008. “Coarse Particulate Organic Matter Transport In Low-Gradient Streams Of The Upper Peninsula Of Michigan”. Journal Of The North American Benthological Society 27 (3): 760 - 771. doi:10.1899/06-119.1.
Functional redundancy of stream macroconsumers despite differences in catchment land use
Schofield, K. A., C.M. Pringle, J.L. Meyer, and Emma J. Rosi-Marshall. 2008. “Functional Redundancy Of Stream Macroconsumers Despite Differences In Catchment Land Use”. Freshwater Biology 53 (12): 2587 - 2599. doi:10.1111/fwb.2008.53.issue-1210.1111/j.1365-2427.2008.02085.x.
Responses in organic matter accumulation and processing to an experimental wood addition in three headwater streams
Entrekin, S.A., J.L. Tank, Emma J. Rosi-Marshall, T.J. Hoellein, and G.A. Lamberti. 2008. “Responses In Organic Matter Accumulation And Processing To An Experimental Wood Addition In Three Headwater Streams”. Freshwater Biology 53 (8): 1642 - 1657. doi:10.1111/fwb.2008.53.issue-810.1111/j.1365-2427.2008.01984.x.
Controls on spatial and temporal variation of nutrient uptake in three Michigan headwater streams
Hoellein, T.J., J.L. Tank, Emma J. Rosi-Marshall, S.A. Entrekin, and G.A. Lamberti. 2007. “Controls On Spatial And Temporal Variation Of Nutrient Uptake In Three Michigan Headwater Streams”. Limnology And Oceanography 52 (5): 1964 - 1977. doi:10.4319/lo.2007.52.5.1964.
Macroinvertebrate secondary production in 3 forested streams of the upper Midwest, USA
Entrekin, S.A., Emma J. Rosi-Marshall, J.L. Tank, T.J. Hoellein, and G.A. Lamberti. 2007. “Macroinvertebrate Secondary Production In 3 Forested Streams Of The Upper Midwest, Usa”. Journal Of The North American Benthological Society 26 (3): 472 - 490. doi:10.1899/06-071.1.
Quantity, controls and functions of large woody debris in Midwestern USA streams
Cordova, Jean M., Emma J. Rosi-Marshall, A. M. Yamamuro, and G.A. Lamberti. 2007. “Quantity, Controls And Functions Of Large Woody Debris In Midwestern Usa Streams”. River Research And Applications 23 (1): 21 - 33. doi:10.1002/(ISSN)1535-146710.1002/rra.v23:110.1002/rra.963.
Toxins in transgenic crop byproducts may affect headwater stream ecosystems
Rosi-Marshall, Emma J., J.L. Tank, Todd V. Royer, M.R. Whiles, M.A. Evans-White, C.P. Chambers, N.A. Griffiths, J. Pokelsek, and M.L. Stephen. 2007. “Toxins In Transgenic Crop Byproducts May Affect Headwater Stream Ecosystems”. Proceedings Of The National Academy Of Sciences 104 (41): 16204 - 16208. doi:10.1073/pnas.0707177104.
Ecological Responses to Trout Habitat Rehabilitation in a Northern Michigan Stream
Rosi-Marshall, Emma J., Ashley H. Moerke, and G.A. Lamberti. 2006. “Ecological Responses To Trout Habitat Rehabilitation In A Northern Michigan Stream”. Environmental Management 38 (1): 99 - 107. doi:10.1007/s00267-005-0177-3.