Jay F. Martin

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Profile

Jay F. Martin

Professor

martin.1130@osu.edu

614-247-6133

Office:

230C Agricultural Engineering

590 Woody Hayes Drive

Professional Information

Degrees & Credentials:

B.S., Purdue University, Environmental Engineering

M.S., University of Florida, Systems Ecology

PhD, Louisiana State University, Oceanography and Coastal Sciences

Research Area(s):

Water

Ecological Engineering

Systems Ecology

Ecological Modeling

Watershed Modeling

Green Infrastructure

Extension Specialization(s):

Stakeholder engagement

Biography:

Jay Martin is a professor of ecological engineering who analyzes and integrates human and natural systems. As a faculty member in the Department of Food, Agricultural and Biological Engineering and a Faculty co-lead for Healthy Land and Water Systems in the OSU Sustainability Institute, he seeks to use natural systems to improve water quality and increase sustainability. His interdisciplinary research links field studies, watershed models, and socio-economic analyses with stakeholder groups to investigate connections between downstream water quality and management practices in upstream watersheds. Currently, Dr. Martin is leading a $5M USDA-NIFA project to establish a Public-Private Partnership with crop consultants and farmers, to identify fields with elevated nutrient levels where management practices will be installed and monitored in an effort to reduce nutrient runoff. He is also leading an interdisciplinary research team to evaluate the impacts of a large green infrastructure project, "Blueprint Columbus," on water, communities, ecosystems, economics and public health within the City of Columbus. Outside of Ohio, Dr. Martin's other research has included Mayan agroecosystems in southern Mexico, biodigesters in Costa Rica, Andes wetlands in Colombia, and the use of algae as a soil amendment by O'ahu farmers in Hawaii. As of 2019, he has published over 70 peer-reviewed articles, successfully advised over 35 Graduate Students and Post Docs, and been awarded more than $17M to support his research program. He is certified as a Senior Ecologist by the Ecological Society of America and a registered Professional Engineer in Ohio.

Google Scholar

Works

Books

Mitsch, WJ, Martin, JF, Lower Olentangy River Ecosystem Restoration. Pre-Fifth Avenue dam removal conditions and prediction for dam removal effects Wilma H. Schiermeier Olentangy River Wetland Research Park. 2012.

Journal Articles

Hu, C.; Ludsin, S.A.; Martin, J.F.; Dittmann, E. et al., "Mycosporine-like amino acids (MAAs)-producing Microcystis in Lake Erie: Development of a qPCR assay and insight into its ecology." Harmful algae 77 (2018) 1-10-1-10

Irwin, N.B.; Irwin, E.G.; Martin, J.F.; Aracena, P., "Constructed wetlands for water quality improvements: Benefit transfer analysis from Ohio." Journal of environmental management 206 (2018) 1063-1071-1063-1071

Marie Gildow, Noel Aloysius, Seyoum Gebremariam, Jay Martin, "Fertilizer placement and application timing as strategies to reduce phosphorus loading to Lake Erie" Journal of Great Lakes Research 42 6 (2016) 1281â€“1288-1281â€“1288

Wendong Zhang, Robyn S. Wilson, Elizabeth Burnett, Elena G. Irwin, Jay F. Martin, "What motivates farmers to apply phosphorus at the â€œrightâ€� time? Survey evidence from the Western Lake Erie Basin" Journal of Great Lakes Research 42 6 (2016) 1343â€“1356-1343â€“1356

Nawa Raj Baral, David M. Wituszynski, Jay F. Martin, Ajay Shah, "Sustainability assessment of cellulosic biorefinery stillage utilization methods using emergy analysis" Energy 109 (2016) 13â€“28-13â€“28

Tamkin, A., Martin, J., Castano, J., Ciotola, R., Rosenblum, J., Bisesi, M., "Impact of organic loading rates on the performance of variable temperature biodigesters" Ecological Engineering 78 (2015) 87-94-87-94

James Rosenblum, Michael Bisesi, Juan Castano, Abigal Tamkin, Richard Ciotola, Jiyoung Lee & Jay Martin, "Influence of seasonal fluctuation and loading rates on microbial and chemical indicators during semicontinuous anaerobic digestion" Environmental Technology 12 10.1080/09593330.2014.986537 (2014) 12-24-12-24

Juan M. Castano, Jay F. Martin, Richard Ciotola, "Performance of a Small-Scale, Variable Temperature Fixed Dome Digester in a Temperate Climate" Energies 7 (2014) 5701-5716-5701-5716

Schlea, D., Martin, J.F., Ward, A., Brown, L., Suter, S., "Stormwater retention and water table responses of retrofit rain gardens" Journal of Hydrologic Engineering 19 (2014) 05014002-05014002

Richard Ciotola *, Jay Martin, Abigail Tamkin, Juan Castano, James Rosenblum, Michael Bisesi, Jiyoung Lee, "The Influence of Loading Rate and Variable Temperatures on Microbial Communities in Anaerobic Digesters" Energies 7 (2014) 785-803-785-803

James Rosenblum, Juan Castano, Jiyoung Lee, Jay Martin and Michael Bisesi, "The Impact of Inoculum-Substrate Ratios on Microbial Levels during Psychrophilic Anaerobic Digestion" Journal of Environmental Science and Engineering A 2 (2013) 625-636-625-636

Richard Ciotola *, Jay Martin, Juan Castano, Jiyoung Lee, Frederick Michel, "Microbial Community Response to Seasonal Temperature Variation in a Small-Scale Anaerobic Digester" Energies 6 (2013) 5182-5199-5182-5199

Gomez,Eddie; Martin,Jay; Michel,Frederick,C, "Effects of organic loading rate on reactor performance and archaeal community structure in mesophilic anaerobic digesters treating municipal sewage sludge" WASTE MANAGEMENT & RESEARCH 29 11 (2011) 1117-1123-1117-1123

Martin, J.F., Roy*, E.D., Diemont, S.A.W., Ferguson, B.G., "Traditional Ecological Knowledge (TEK): Ideas, Inspiration, and Designs for Ecological Engineering" Ecological Engineering 36 7 (2010) 839-849-839-849

Wahl, M.D., Brown, L.C., Soboyejo, A.O., Martin, J.F., Dong, B., "Quantifying the Hydraulic Performance of Treatment Wetlands Using the Moment Index" Ecological Engineering 36 (2010) 1691-1699-1691-1699

Lansing, S., Martin, J.F., Botero, R.B., Da Silva, T.N., Da Silva, E.D., "Methane Production in Low-Cost, Co-Digestion Systems Treating Manure and Used Cooking Grease" Bioresource Technology 101 (2010) 4362-4370-4362-4370

Morgan*, J.A., Martin, J.F., Bouchard, V., "Identifying plant species with root associated bacteria that promote nitrification and denitrification in ecological treatment systems" Wetlands 28 (2008) 220-231-220-231

Lansing*, S., Viquez, J., Martinez, H., Botero, R., Martin, J., "Optimizing electricity generation and waste transformations in a low-cost, plug-flow anaerobic digestion system" Ecological Engineering 34 (2008) 332-348-332-348

Diemont,Stewart,AW; Martin,Jay,F; Levy-Tacher,Samuel,I; Nigh,Ronald,B; Lopez,Pedro,Ramirez; Golicher,J,Duncan, "Lacandon Maya forest management: Restoration of soil fertility using native tree species" ECOLOGICAL ENGINEERING 28 3 (2006) 205-212-205-212

Lansing,Stephanie,L; Martin,Jay,F, "Use of an ecological treatment system (ETS) for removal of nutrients from dairy wastewater" ECOLOGICAL ENGINEERING 28 3 (2006) 235-245-235-245

Martin, J.F., *Diemont, S.A.W, Powell, E., Stanton, M., Levy-Tacher, S., "Evaluating and comparing the sustainability of three agricultural methods with emergy analysis" Agriculture, Ecosystems, and Environment 115 (2006) 128-140-128-140

Lansing*, S.L., Martin, J.F., "Use of an ecological treatment system (ETS) for removal of nutrients from dairy wastewater" Ecological Engineering 28 (2006) 235-245-235-245

Smialek, J., Bouchard, V., Lippman, B., Quigley, M., Granata, T., Martin, J., Brown,L., "Effect of a woody (Salix nigra) and herbaceous (Juncus effusus) macrophyte species and methane dynamics and denitrification" Wetlands 26 2 (2006) 509-517-509-517

*Holland, J.F., Martin, J.F., Granata, T.C., Bouchard, V., Quigley, M., Brown, L., "Analysis and modeling of suspended solids from high-frequency monitoring of a stormwater treatment wetland" Ecological Engineering 24 3 (2005) 159-176-159-176

*Holland, J.F., Martin, J.F., Granata, T., Bouchard, V., Quigley, M., Brown, L., "Effects of wetland depth and flow rate on residence time distribution characteristics" Ecological Engineering 23 3 (2004) 189-203-189-203

Martin, J.F., *Hofherr, E. Quigley, M., "Effects of Typha latifolia transpiration and harvesting on nitrate concentrations in surface water of wetland microcosms" Wetlands 23 4 (2003) 835-844-835-844

Beck, T., Quigley, M.F., Martin, J.F., "Emergy evaluation of food production in urban residential landscapes" Urban Ecosystems 5 (2001) 187-207-187-207

Bruce G. Ferguson, Ph.D.; Stewart A Diemont, PhD; Rigoberto Alfaro-Arguello, MS; Jay F Martin, PhD; José Nahed Toral, PhD; David Álvarez-Solís, PhD; René Pinto-Ruíz, PhD, "Sustainability of Holistic and Conventional Cattle Ranching in the Seasonally Dry Tropics of Chiapas, Mexico" Agricultural Systems

Richard Ciotola *, Jay Martin, Juan Castano, Jiyoung Lee, Frederick Michel, "Microbial Community Response to Seasonal Temperature Variation in a Small-Scale Anaerobic Digester" Energies

Scavia, Donald; Kalcic, Margaret; Muenich, Rebecca; Read, Jennifer; Aloysius, Noel; Arnold, Jeffrey; Boles, Chelsie; Confesor, Rem; DePinto, Joseph; Gildow, Marie; Martin, Jay; Redder, Todd; Robertson, Dale; Sowa, Scott; White, Michael; Yen, Haw,, "Multiple models guide strategies for agricultural nutrient reductions"

Juan M. Castano *, Jay F. Martin, Richard Ciotola, "Performance of a small scale, variable temperature fixed dome digester in a temperate climate" energies

Tsung-Ta David Hsu, Jay F. Martin, William J. Mitsch and Jiyoung Lee, "Towards sustainable protection of public health: The role of an urban wetland as a frontline safeguard of pathogen and antibiotic resistance spread" Ecological Engineering

Chapters

"Accounting for environmental sustainability with emergy analysis" In Encyclopedia of Soil Science. 2007.

"Environmental accounting of agricultural sustainability using emergy analysis" In UNESCO-Encyclopedia of Life Support Systems. Theme: Systems Analysis and Modeling in Food and Agriculture. Edited by K.C. Ting, D.H.Fleisher, L.F. Rodriguez. 2007.

"Habitat changes in the Mississippi Delta: future scenarios and alternatives" In Landscape Simulation Modeling: A spatially explicit, dynamic approach. Edited by R. Costanza and A. Voinov. 2004.

"Impact of sea level rise on coastal landscapes" In Integrated Assessment of the Climate Change Impacts on the Gulf Coast Region-Foundation Document. Edited by Ning, Z.H., R. E. Turner, T. Doyle, and K. Abdollahi. 2003.

"Simulating coastal environments with landscape models: Applications in the Mississippi Delta and Lake Erie" In Ecological Forecasting: New Tools for Coastal and Ecosystem Management. Edited by N.J. Valette-Silver and D. Scavia. 2003.

"Wetlands sedimentation and ecological engineering" In Encyclopedia of Soil Science. 2002.

"Simulating with STELLA" In Modeling for all scales. Edited by Odum, H.T. and Odum, E.C.. 2000.

"Landscape modeling in coastal Louisiana: regional mechanisms of land loss" In Recent research in coastal Louisiana. Edited by Rozas, L.P., Nyman, A., Proffitt, C.E., Rabalais, N.N., Reed, D.J., Turner, R.E.. 1999.

Conferences

Pease, L.A.; Fausey, N.R.; Martin, J.F.; Brown, L.C., "Climate, landscape, and management effects on nitrate and soluble phosphorus concentrations in subsurface drainage discharge in the western lake erie basin" 2016.

Gomez, E., Martin, J., Michel, F., "Effects of Organic Loading Rate on Reactor Performance and Archaeal Community Structure in Mesophilic Anaerobic Digesters Treating Municipal Sewage Sludge" Proceendings of the 7th International ORBIT 2010 Conference. Heraklion, Crete, June 29 - July 3 2010.

Lansing, S.; Martin, J.F.; Botero, R.B., "Optimizing small-scale anaerobic digestion in Costa Rica through co-digestion" 2009.

Alfaro, R., Diemont, S., Ferguson, B., Martin, J., "The ranching for sustainability club: Grass roots change for dairy production in Chiapas, Mexico" Proceedings for the 5th Biennial Emergy Research Conference 2009.

Lansing, Stephanie L., Jay F. Martin and Raúl Botero Botero, "Methane production and water quality improvements in agricultural biodigesters in Costa Rica" American Society of Agricultural and Biological Engineers International Conference Proceedings 2006.

*Keppler, A., Martin, J.F., "Using living machines for the treatment and utilization of dairy washwater" American Society of Agricultural and Biological Engineers annual conference 2004.

*Coffman, R., Martin, J.F., "The sustainability of an agricultural roof garden" Greening Rooftops For Sustainable Communities 2004.

*Diemont, S.A.W., Martin, J.F., Levy-Tacher, S., "Emergy analysis of Lacandon Maya agroforestry in Chiapas, Mexico" Proceedings of the 3rd Biennial Emergy Research Conference 2004.

Martin, J.F., *Hofherr, E., "Effects of macrophyte water uptake on nitrogen removal from wetland treatment systems" Proceedings from the annual International Ecological Engineering Conference 2001.

Martin, J.F., "The transformity of riverine sediments in the Mississippi Delta" Emergy Synthesis: Theory and Applications of Emergy Methodology: Proceedings from the First Biennial Emergy Analysis Research Conference 2001.

Ko, J-Y., Martin, J.F., and Day, J.W., "Embodied energy and emergy analysis of wastewater treatment using wetlands" Emergy Synthesis: Theory and Applications of Emergy Methodology: Proceedings from the First Biennial Emergy Analysis Research Conference 2000.

Martin, J.F., "Emergy analyses of river diversions within the Mississippi delta" Proceedings from the annual meeting of the Intl. Society for the Systems Sciences 1998.

Presentations

"Update on Watershed Modeling in Western Lake Erie Watersheds." In Ohio Directors Meeting. 2019.

"Predicting Impacts of the NOAA-NWS Runoff Risk Advisory Forecast on Water Quality with Multiple SWAT Watershed Models in the Western Lake Erie basin, USA." In Annual International Meeting of the American Society of Agricultural and Biological Engineers (ASABE). 2019.

"Modeling Phosphorus Delivery Rates: Manure vs. Inorganic Fertilizer." In Annual International Meeting of the American Society of Agricultural and Biological Engineers (ASABE). 2019.

"Forming Public-Private Partnerships to Identify and Manage Agricultural Fields with Elevated Phosphorus in the Western Lake Erie Basin." In Annual International Meeting of the American Society of Agricultural and Biological Engineers (ASABE). 2019.

"Shifting Demographics: Modeling the Impact of Future Changes in the Farming Community within the Maumee River Watershed." In Annual International Meeting of the American Society of Agricultural and Biological Engineers (ASABE). 2019.

"Early Returns on Green Infrastructure Retrofits: Blueprint Columbus 2 Years After." In American Ecological Engineering Society Conference. 2019.

"Deglobalization and Its Discontents in Interconnected Regional Food, Energy, and Water Systems." In American Geophysical Union (fall meeting). 2017.

"Using Watershed Models and Human Behavioral Analyses to identify Management Options to Reduce Lake Erie’s Harmful Algal Blooms." In American Geophysical Union. 2017.

"Floraciones de Algas Tóxicas en Lago Erie (Toxic Algal Blooms in Lake Erie)." In National Congress of Environmental Sciences. 2017.

"Simulating historical land management impacts on Maumee River phosphorus loading trends." In International Association for Great Lakes Research Annual Meeting. 2017.

"Modeling the Impact of Manure Application Practices: Phosphorous Discharge from the Maumee Watershed." In International Society for Great Lakes Resaerch Annual Meeting. 2017.

"Projection and Adoption of Management Plans to Reduce Lake Erie's Harmful Algal Blooms." In International Society for Great Lakes Resaerch Annual Meeting. 2017.

"The role of farmer efficacy in improving water quality." In International Association for Great Lakes Research Annual Meeting. 2017.

"The impacts of changes in future Maumee watershed phosphorus loads on water quality in the Maumee Bay of the Western Lake Erie Basin using validated lake models." In 18th Research Symposium of the Association of 1890 Research Directors. 2017.

"Nutrient Application and Algal Blooms: Farmer Decisions Regarding the Use of Best Management Practices in Lake Erie’s Maumee River Watershed." In 2016 American Geophysical Union. 2016.

"Reducing Lake Erie’s Harmful Algal Blooms: Projection and Adoption of Management Plans." In 2016 American Geophysical Union. 2016.

"Measuring Hydrocarbons in Stormwater with Carbon Isotopes.." In Water Management Association of Ohio Conference. 2016.

"Stormwater green streets: lessons learned and expected outcomes in Ohio." In 45th Annual Water Management Association of Ohio Conference. 2016.

"Measuring Hydrocarbons with Carbon Isotopes." In American Ecological Engineering Society Annual Meeting. 2016.

"Assessing the Resource Use and Sustainability of an Urban Learning Garden." In American Ecological Engineering Society. 2013.

"Evaluation of Impact of Cropland Best Management Practices on Reactive Dissolved Phosphorus Load Entering Lake Erie." In American Ecological Engineering Society. 2013.

"Impacts of Crop Management Practices in the Maumee Watershed on Dissolved Phosphorus Inputs to Lake Erie." In 2013 International Association of Great Lakes Researchers Ann. Mtg.. 2013.

"Modeling Public Health Effects of Climate Change: Predicting Human Exposure to Microcystin from Lake Erie." In American Ecological Engineering Society. 2013.

"Quantification of Hydrocarbon in Urban Stormwater: Comparison of Stable Isotopes Analysis with Current Methodologies." In American Ecological Engineering Society. 2013.

"CHANS Research:The â€˜Rightâ€™ Practices & the â€˜Rightâ€™ Questions." In American Geophysical Union. 2012.

"Toward Development of a Coupled Human-Natural Systems Model to Understand Climate Impacts on the Lake Erie Ecosystem." In American Geophysical Union. 2012.

"Comparing recovery in psychrophilic lab-scale biodigesters of differing organic loading rates." In Ecosummit 2012. 2012.

"Coupled human and natural systems: human behavioural responses to changing ecosystem conditions." In Ecosummit 2012. 2012.

"Nutrient retention in residential retrofitted rain gardens." In Ecosummit 2012. 2012.

"Restoring water storage and purification with rain gardens." In Ecosummit 2012. 2012.

"Ecological engineering: designing and restoring ecosystem services." In Ecosummit 2012. 2012.

"The prosperous way down." In Ecosummit 2012. 2012.

"Pathogen Removal by Constructed Riparian Wetlands during Variable Hydrologic Conditions in Central Ohio." In Ecosummit 2012. 2012.

"Peak Oil, Ecological Engineering, Indigenous Knowledge: Problems, Opportunities, Ideas." In American Society of Agricultural and Biological Engineers. 2012.

"Retrofit bioretention cells: Water quantity and quality." In American Society of Agricultural and Biological Engineers. 2012.

"Comparing Recovery of Psychrophilic Lab-Scale Digesters of Different Organic Loading Rates." In American Ecological Engineering Society Annual Conference. 2012.

"Water Balance of Retrofit, Right of Way Rain Gardens." In American Ecological Engineering Society Annual Conference. 2012.

"Modeling Hydrologic and Ecological Factors Impacting Phosphorus Movement from Agricultural Fields to Rivers in NW Ohio." In American Ecological Engineering Society Annual Conference. 2012.

"Evolution of Upstream Human Behavior and Downstream Ecosystem Services in a Changing Climate." In American Ecological Engineering Society Annual Conference. 2012.

"Influence of Seasons and Loading Rates on the Level of Fecal Indicator Organisms During Continuos Style Anaerobic Digesters." In American Ecological Engineering Society Annual Conference. 2012.

"Urban Agriculture on the University Campus: Design and Impacts." In Annual Meeting of the American Ecological Engineering Society. 2012.

"Nutrient Retention in Retrofitted Residential Rain Gardens." In American Ecological Engineering Society Annual Conference. 2012.

"Predicting Net Economic Gains based on Willingness to pay and cost of Water Quality Improvements." In Annual conference of the American Ecological Engineering Society. 2012.

"Interactions Between Human Decisions, Biophysical Processes, and Ecosystem Services: Maumee Watershed and Bay." In Maumee Area of Concern (AOC) Summit. 2012.

"Comparing Recovery in Psychrophilic Lab-Scale Digesters." In COE/KSA Undergraduate Research Forum. 2012.

"Traditional Ecological Knowledge (TEK): Ideas and Inspiration to Design and Restore Ecosystems." In Society of Ecological Restoration World Conference 2011. 2011.

"The Effects of Aging Manure on Biodigester Performance." In American Ecological Engineering Conference 2011 conference. 2011.

"A hydrological study of rain gardens." In American Ecological Engineering Society 2011 conference. 2011.

"A hydrological and water quality study of a rain garden network in Westerville, Ohio." In Ohio Stormwater Conference. 2011.

"The Effect of the Inoculum Substrate Ratio on the Microbial Community Composition during Start-Up a Small-Scale Anaerobic Digester." In American Ecological Engineering Society 2011 conference. 2011.

"Gas production in fixed dome digesters in temperate climates." In American Ecological Engineering Society 2011 Conference. 2011.

"Keynote Panel: "Engineering for Ecosystem Services and a Sustainable Society"." In American Ecological Engineering Society Conference 2011. 2011.

"Effects of Organic Loading Rate on Reactor Performance and Archaeal Community Structure in Mesophilic Anaerobic Digesters Treating Municipal Sewage Sludge." In American Ecological Engineering Society 2011 Conference. 2011.

"Stormwater Control Methods (SCM): Assessment." In American Ecological Engineering Society 2011 conference. 2011.

"Rain Gardens as a retro-fit solution to residential stormwater management problems." In American Ecological Engineering Society 2011 conference. 2011.

"Emergy Evaluation of Urban Community Food Production." In OARDC annual conference. 2011.

"Rain Gardens: A Partnership Neighborhood Project." In 9th Annual Central Ohio Stormwater and Erosion Control Expo. 2011.

"Add later." In OARDC annual meeting. 2011.

"Metodos Sustenibles de Escorentia en Zonas Urbanos." In Expo Aqua-International Water Conference. 2010.

"Ecological Engineering Approaches to Storm water Management." In Graduate Seminar. 2010.

"EFFECT OF ORGANIC LOADING RATE ON REACTOR PERFORMANCE AND ARCHAEAL COMMUNITY STRUCTURE IN MESOPHILIC ANAEROBIC DIGESTERS TREATING BIOSOLIDS." In ORBIT. 2010.

"Microbial Community Analysis of Ambient Temperature Anaerobic Digestors." In American Ecological Engineering Society Annual Meeting. 2010.

"Gas Production Analysis of a Fixed-Dome Digester Operated Under Temperate Climates in Central Ohio." In American Ecological Engineering Society Annual Meeting. 2010.

"Transforming Anaerobic Digestion with the â€˜Model Tâ€™ of digesters." In American Ecological Engineering Society Annual Meeting. 2010.

"Rain Gardens." In Olentangy Wetland Research Park Seminar Series. 2010.

"Mi Trabajo en Engineria Ecologico." In Graduate Seminar, Universidad de Technologia de Pereira. 2010.

"Devloping the â€˜Model Tâ€™ of Anaerobic Digesters." In Decentralized Waste Treatment Conference-Waste to Energy. 2010.

"Rain garden networks: impacts on water quality." In American Ecological Engineering Society Annual Meeting. 2010.

"Devloping the â€˜Model Tâ€™ of Anaerobic Digesters." In OARDC Bioenergy Conference. 2009.

"Emergy Analysis of Biogas Production and Utilization in Costa Rica.." In American Ecological Engineering Society Annual Conference. 2009.

"Mapping a Dynamic Social-Ecological â€œLandscapeâ€� for Large Lakes: System Perturbations and the Role of Ecological Engineering." In American Ecological Engineering Society. 2009.

"Unstable Social-ecological Equilibria: The effects of Invasive Species and Ecosystem Restoration on Nutrient Manangement Compromise in Lake Erie." In American Society of Landscape Ecology. 2009.

"Restoring Natural System Functions to Sustain the World's River Deltas. International Symposium on Climate Change and Food Security in South Asia. Dhaka, Bangladesh, 25-30 August, 2008. Invited.." In International Symposium on Climate Change and Food Security in South Asia. 2008.

"Optimizing Methane Production and Electricity Generation in Small-Scale Agricultural Digesters in Costa Rica." In American Ecological Engineering. 2008.

"Pathogen Removal by Constructed Riparian Wetlands During Variable Hydrologic Conditions in Central Ohio." In American Ecological Engineering. 2008.

"Modeling Relationships Between Ecological Processes and Human Development Patterns within Lacustrine Ecosystems." In American Ecological Engineering. 2008.

"Hydrologic pulsing and riparian freshwater wetlands." In Society of Wetland Scientist Annual Meeting. 2008.

"Emergy Analysis of Sediments and Agriculture: Implications to the Arrowhead Region of Minnesota." In The Concept of Time in Sustainability of Northeast Minnesota. 2008.

"The ranching for sustainability club: Grass roots change for dairy production in Chiapas, Mexico." In Fifth Bienniel Emergy Research Conference. 2008.

"Agroecosystems." In American Ecological Engineering Society Annual Meeting. 2007.

"Optimizing Electricity Generation and Wastewater Treatment in Small-Scale Digesters." In American Society of Agricultural and Biological Engineers. 2007.

"The effects of organic soil admentments in bioretention soil mixes on the removal of total petroleum hydrocarbons from simulated stormwater." In American Ecological Engineering Society. 2007.

"Pathogen removal by constructed wetlands under steady flow and pulsing hydrologic conditions in central Ohio." In American Ecological Engineering Society. 2007.

"Developing a certification in Ecological Design." In American Ecological Engineering Society. 2007.

"Modeling relantionships between ecological processes and human development patterns within lacustrine ecosystems." In American Ecological Engineering Society. 2007.

"Effects of feedstock composition on methane production and waste water treatment in low-tech anaerobic digesters." In American Ecological Engineering Society. 2007.

"Effects of different concentrations of dairy wastewater on an ecological treatment system." In American Ecological Engineering Society. 2007.

"Anaerobic biodigester technology for smaller scale waste flows in temperate climates." In American Ecological Engineering Society. 2007.

"Gas production and water quality analysis of agricultural biodigesters in Costa Rica." In American Society of Agricultural and Biological Engineers annual conference. 2006.

"Removal of pathogenic and indicator bacteria from dairy wastewater using an ecological treatment system." In American Ecological Engineering Society. 2006.

"Sustainable energy production and water treatment with agricultural biodigesters in Costa Rica." In American Ecological Engineering Society. 2006.

"Plant community design and successional patterns in indigenous agroforestry systems of Chiapas, Mexico." In American Ecological Engineering Society. 2006.

"Designing Agricultural Systems for the Prosperous Way Down: Guidance from Cuba." In American Ecological Engineering Society. 2006.

"Biocomplexity of Large Lakes? Models of Lake Erie Natural-Human Interactions." In IAGLR. 2006.

"Self-organization of an ecological system treating dairy washwater." In American Society of Agricultural and Biological Engineers annual meeting. 2005.

"Wetland creation for water quality improvement in Costa Rica." In American Ecological Engineering Society annual meeting. 2005.

"Comparison of Denitrification rates between two plant species used in Ecological Treatment Systems." In American Ecological Engineering Society annual meeting. 2005.

"Will indigenous Maya forest management give us new tools for restoring and conserving tropical rainforests?." In American Ecological Engineering Society annual meeting. 2005.

"An ecological treatment system for dairy washwater." In Ohio Composting and Manure Management seminar. 2005.

"Emergy and ecosystem management." In American Society of Agricultural and Biological Engineers. STREAMS Conference. 2004.

"Water treatment systems." In American Society of Agricultural and Biological Engineers. STREAMS Conference. 2004.

"Emergy and ecosystem management." In CIRIT (clusters of interdisciplinary research on International themes) Seminar Series. 2004.

"Ecosystem health and sustainability of an indigenous agroforestry system in Chiapas, Mexico." In American Ecological Engineering Society Annual Conference. 2004.

"Use of an ecological treatment system (ETS) for removal of nutrients, solids and pathogens from dairy wash-water." In American Ecological Engineering Society Annual Conference. 2004.

"The treatment of dairy wastewater at different loading rates with an ecologically engineered system." In American Ecological Engineering Society Annual Conference. 2004.

"Creating a module for ecological engineering design courses." In American Ecological Engineering Society Annual Conference. 2004.

"Comparing the resources and sustainability of three agricultural methods with emergy analysis." In Third Biennial Emergy Analysis Research Conference. 2004.

"Emergy analysis of Lacadon Maya agroforesty in Chiapas, Mexico." In Third Biennial Emergy Analysis Research Conference. 2004.

"Effects of water level and flow rate on wetland hydraulic efficiency." In American Ecological Engineering Society Annual Meeting. 2003.

"Development of a General Ecological Model for the Sandusky Watershed." In American Ecological Engineering Society Annual Meeting. 2003.

"Studying the Effect of Macrophyte Transpiration and Harvesting on Nitrate Concentrations in Wetland Treatment Systems." In American Society of Ecological Engineering conference. 2003.

"Treating and Utilizing Dairy Washwater with an Ecological Engineered Treatment System." In American Ecological Engineering Society Annual Meeting. 2003.

"Preliminary Assessment of Lacandon Maya Agroecosystems. Ohio Latin Americanist Conference. February 28. Columbus, Ohio.." 2003.

"An Ecologically engineered system to treat dairy washwater. Institute of Biological Engineering annual conference, University of Georgia. January 17-19, Athens, Georgia.." In Institute of Biological Engineering annual conference. 2003.

"Assessing coastal management plans using watershed spatial models for the Mississippi delta, USA, and the Usumacinta/Grijalva delta, Mexico. ECSA-35 (ERF) Symposium on "Scientific Research as a Strategy to Support Estuarine & Coastal Management" April 28." 2003.

"Effect of plant species on denitrification and methane emissions in constructed wetlands. April 5. Ohio Academy of Science, Findlay, Ohio.." 2003.

"Lacandon Maya Agriculture: An Ecologically Engineered Indigenous System." In American Ecological Engineering Society Annual Meeting. 2003.

"Manipulations of natural system functions within the Mississippi Delta." In Dissertation symposium for the advancement of coastal, estuarine, and great lakes science. 2002.

"Ecological methods to treat and utilize waste water." In the Instituto de Ecologia, A.C.. 2002.

"Effects of introducing varying densities of large woody debris on fish communities of a warmwater stream." In American Ecological Engineering Society Annual Meeting. 2002.

"Developing a watershed model to quantify water quality and habitat impacts of land use change." In American Ecological Engineering Society Annual Meeting. 2002.

"Effects of pulsing events upon wetland nutrient dynamics and water quality." In American Ecological Engineering Society Annual Meeting. 2002.

"Maya agroforestry in southern Mexico and Guatemala." In Ohio Latin Americanist Conference. 2002.

"Creating new ecological engineering courses: Lessons learned." In American Society of Ecological Engineering conference. 2002.

"Creating New Ecological Engineering Courses: Lessons Learned. American Society of Ecological Engineering conference, University of Vermont. April 28-30, 2002, Burlington, Vermont.." 2002.

"Effects of macrophyte water uptake on nitrogen removal from wetland treatment systems." In Proceedings from the annual International Ecological Engineering Conference. 2001.

"Modeling the effects of sea level rise across delta landscapes." In Biennial Conference of the Estuarine Research Federation. 2001.

"The effect of varying densities of large woody debris on fish communities in urban streams." In Fourth Annual North Carolina Stream Restoration Conference. 2001.

"Applying emergy analysis to river diversions: Lessons learned." In Second Biennial Emergy Analysis Research Conference. 2001.

"Drivers of nutrient hotspots in agriculturally dominated watersheds.." In International Association for Great Lakes Research Annual Meeting.

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