David Tilley

David R. Tilley is an ecological engineer and systems-oriented environmental scholar whose work connects ecological design, environmental accounting, innovation, and emerging forms of artificial intelligence. His research and teaching focus on how ecological intelligence can help society better understand, design, and manage human-dominated environments. Building on long-standing work in ecological engineering, green infrastructure, living architecture, and emergy-based systems analysis, he now explores how generative AI and related digital tools can expand environmental problem solving, education, and nature-based design. This direction is reflected in his recent publication on the use of multimodal generative AI in ecological engineering, in his course ENST 283 AI for Environmental Good, and in applied sustainability collaborations related to greener data-center futures.

Tilley, D. 2025. Using the Multimodal Features of Generative AI to Advance Ecological Engineering. Journal of Ecological Engineering Design, 3(https://doi.org/10.70793/jeed.17). https://journals.uvm.edu/jeed/article/id/17/https://doi.org/10.70793/jeed.17 

Explores how generative AI (ChatGPT-4) can advance ecological engineering through multimodal capabilities such as image analysis, spatial reasoning, coding, and teaching support. Demonstrations include plant disease detection, forest image analysis, and student assessment. The paper highlights CustomGPTs and AI agents as tools for modeling, design, monitoring, and public engagement.

Thompson, R., S. Tjaden, D. Tilley, 2022. Stormwater retention of an in-series system composed of a green roof, constructed wetland and bioretention cell for a single-family home. ASCE Journal of Sustainable Water in the Built Environment 8(1): 04021023

Tilley D.R., 2021. The World Needs Massive Ubiquitous Environmental Innovation and Entrepreneurship to Remedy Its Predicament. Environ Sci Ecol: Curr Res 2: 1042

Schumann, L.M., D.R. Tilley, 2022. Experimental evidence for delayed stormwater runoff from building roofs covered with suspended vine canopies. Journal of Living Architecture 9(1): 1-19 doi.org/10.46534/jliv.2022.09.01.001 

Mo, Y., M. Kearney, J. C. Alexis Riter, F. Zhao, D. Tilley, 2018. Assessing biomass of diverse coastal marsh ecosystems with combined ground, airborne, and spaceborne remote sensing data. International Journal of Applied Earth Observation and Geoinformation

Yi, H., R. Srinivasan, W.W. Braham, D.R. Tilley, 2017. An ecological understanding of net-zero energy building: Evaluation of sustainability based on emergy theory. J. Cleaner Production 143: 654-671 10.1016/j.jclepro.2016.12.059

Yi, H., W.W. Braham, D.R. Tilley, R. Srinivasan, 2017. Measuring ecological characteristics of environmental building performance: Suggestion of an information-network model and indices to quantify complexity, power, and sustainability of energetic organization. Ecological Indicators 83: 201-217 doi.org/10.1016/j.ecolind.2017.07.056

Yi, H., W.W. Braham, D.R. Tilley, R. Srinivasan, 2017. A metabolic network approach to building performance: Information building modeling and simulation of biological indicators. J. Cleaner Production 165: 1133-1162 doi.10.1016/j.jclepro.2017.07.082

Campbell, E.T., D.R. Tilley, 2016. Relationships between renewable emergy storage or flow and biodiversity: A modeling investigation. Ecological Modelling 340: 134-148 10.1016/j.ecolmodel.2016.08.004

Brown, M.T., D.E. Campbell, D.R. Tilley, 2015. Emergy synthesis 8: Emergy and environmental accounting: Theories, applications, and methodologies. Ecological Modelling 315: 1-3 doi.org/10.1016/j.ecolmodel.2015.08.018

Matt, S., D.R. Tilley, P. Shrewsbury, 2015. Arthropod habitat of green facades in the humid, temperate climate of eastern North America. Journal of Living Architecture 2(3): 1-41 greeninfrastructurefoundation.org/jliv

Williamson, T.R., Tilley, D.R., E.T. Campbell, 2015. Emergy Analysis to Evaluate the Sustainability of Two Oyster Aquaculture Systems in the Chesapeake Bay. Ecological Engineering http://dx.doi.org/10.1016/j.ecoleng.2015.09.052

Winfrey, B.K., D.R. Tilley, 2015. An emergy-based treatment sustainability index for evaluating waste treatment systems. J. Cleaner Production doi.org/10.1016/j.jclepro.2015.05.074

Williamson, T.R., Tilley, D.R., Y. Tao, 2015. Valve activity in cultured oysters exposed to sudden increases in salinity. J Aquacul Research 1(3): 012 

Izursa, J.L., D.R. Tilley, 2015. Dynamic Eco-industrial Model of Forest Rich Developing Nations: Application to the Bolivian Forestry Sector and National Economy. J. Environmental Accounting and Management 3(1): 1-26

Tilley, D.R., 2015. Transformity dynamics related to maximum power for improved emergy yield estimations. Ecological Modelling 315: 96-107 http://dx.doi.org/10.1016/j.ecolmodel.2014.10.035

Winfrey, B.K., R.W. Nairn, D.R. Tilley, W.H.J. Strosnider, 2014. Emergy and carbon footprint analysis of the construction of passive and active treatment systems for net alkaline mine drainage. Mine Water and Environment Nov. 1, DOI:10.1007/s10230-014-0304-6

Campbell, E.T., D.R. Tilley, 2014. The eco-price: how environmental emergy equates to currency. Ecosystem Services Available on-line 1.7.2014 dx.doi.org.proxyum.researchport.umd.edu/10.1016/j.ecoser.2013.12.002

Campbell, E.T., D.R. Tilley, 2014. Valuing ecosystem services from Maryland forests using environmental accounting. Ecosystem Services Available on-line Dec. 4, 2013 http://dx.doi.org/10.1016/j.ecoser.2013.10.003

Hudson, A.R., D.R. Tilley, 2014. Assessment of uncertainty in emergy evaluations using Monte Carlo simulations. Ecological Modelling 271(10): 52-61 http://dx.doi.org/10.1016/j.ecolmodel.2013.05.018

Izursa, J.L., D.R. Tilley, P.C. Kangas, 2014. Sustainability of certified tropical forestry using emergy analysis. J. Environmental Accounting and Management 2(1): 73-89 DOI:10.5890/JEAM.2014.03.006

Li, L., Lu, H., Tilley, D.R., G. Qiu, 2014.  Effect of time scale on accounting for renewable emergy in ecosystems located in humid and arid climates. Ecological Modelling 287: 1-8 http://dx.doi.org/10.1016/j.ecolmodel.2014.05.001

Moss, A., S. Lansing, D.R. Tilley, K.H. Klavon, 2014. Assessing the sustainability of small-scale anaerobic digestion systems with the introduction of the emergy efficiency index (EEI) and adjusted yield ratio (AYR). Ecological Engineering 64: 391–407 dx.doi.org/10.1016/j.ecoleng.2013.12.008

Tilley, D.R., 2014. Exploration of Odum’s Dynamic Emergy Accounting for Suggested Refinements. Ecological Modelling 279: 36-44 DOI:10.1016/j.ecolmodel.2014.01.031

Tilley, D.R., S. Matt, J. Price, L. Schumann, P. Kangas, 2014. Vegetation characteristics of green facades, green cloaks and naturally colonized walls of wooden barns located in the Mid-Atlantic Region of North America. Journal of Living Architecture 1(3): 1-34 livingarchitecturemonitor.com/fullarchive

Li, L., D.R. Tilley, Lu, H., Ren, H., Qiu, G. 2013. Comparison of energy systems minimodel to a process-based eco-physiological model for simulating forest growth. Ecological Modelling 263: 32-41 http://dx.doi.org/10.1016/j.ecolmodel.2013.04.019

Li, L., Lu, H., Tilley, D.R., Ren, H., Shen, W., 2013. The maximum empower principle: an invisible hand controlling the self-organizing development of forest ecosystems in south China. Ecological Indicators 29: 278-292 DOI: 10.1016/j.ecolind.2012.12.033

Tilley, D.R. 2011. Dynamic accounting of emergy cycling. Ecological Modelling 222(20-22): 3724-3742 doi:10.1016/j.ecolmodel.2011.09.007

Vassallo, P., C. Paoli, D.R. Tilley, M. Fabiano, 2009. Energy and resource basis of an Italian coastal resort region integrated using emergy synthesis. J. Environmental Management 91(1): 277-289 doi:10.1016/j.jenvman.2009.08.017  

Felix, E., D.R. Tilley 2009. Integrated energy, environmental and financial analysis of ethanol production from cellulosic switchgrass. Energy 34(4): 410-436 doi:10.1016/j.energy.2008.10.013 

Felix, E., D.R. Tilley, G.K. Felton, E. Flamino, 2008. Biomass production of hybrid poplar (Populus spp.) grown on municipal biosolids. Ecological Engineering (33)1: 8-14

Tilley, D.R., M. Ahmed, J. Son, H. Badrinarayanan, 2007. Hyperspectral reflectance response of freshwater macrophytes to salinity in a brackish treatment marsh. Journal of Environmental Quality 36(3): 773-779

Tilley, D.R., V. Comar, 2006.  Emergy-based simulation to assess Brazil’s long-term carrying capacity: electricity and population. Population and Environment 27: 307-326

Tilley, D.R. 2006. National metabolism and communications technology development in the United States: 1790 to 2000. Environment and History 12(2): 165-190

Tilley, D.R., M.T. Brown, 2006.  Dynamic emergy accounting for assessing the environmental benefits of a subtropical wetland stormwater management system.  Ecological Modelling 192: 327-361

Tilley, D.R., J. Mentzer, 2006. Soil uptake of carbon monoxide emitted in the exhaust of a gasoline powered engine. J. Air & Waste Management Association 56: 115-120

Tilley, D.R., 2004. Howard T. Odum’s contribution to the laws of energy.  Ecological Modelling 178(1-2): 121-125

Tilley, D.R., M. Ahmed, J. Son, H. Badrinarayanan, 2003.  Hyperspectral reflectance of emergent macrophytes as an indicator of water column ammonia in an oligohaline, subtropical marsh. Ecological Engineering 21(2-3): 153-163.

Tilley, D.R., W.T. Swank, 2003.  EMERGY-based environmental systems assessment of a multi-purpose temperate mixed-forest watershed of the Southern Appalachian Mountains, USA.  Journal of Environmental Management 69(3): 213-227

Tilley, D.R., 2003. Industrial ecology and ecological engineering: opportunities for symbiosis. J. Industrial Ecology 7(2): 13-32

Brown MT, McMahan EA, Mitsch WJ, Diamond C, Winasrky I, Chandler R, Carstenn S, McLachlan-Karr J, Nixon S, Tilley DR, (and 63 others), 2003. Prof. Howard T. Odum 1924-2002.  Energy 28(4): 293-301

Tilley, D.R., H. Badrinarayanan, R. Rosati and J. Son, 2002.  Constructed wetlands as recirculation filters in large-scale shrimp aquaculture.  Aquacultural Engineering 26(2): 81-109.

Tilley, D.R., M.T. Brown, 1998. Wetland networks for stormwater management in subtropical urban watersheds.  Ecological Engineering 10(2):131-158.

1. Brown, M.T., D. Campbell, D.S. Kang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.), 2013. Emergy Synthesis 7: Theory and Applications of the Emergy Methodology. University of Florida Center for Environmental Policy, Gainesville.
2. Brown, M.T., D. Campbell, S.L. Huang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.) 2011. Emergy Synthesis 6: Theory and Applications of the Emergy Methodology. University of Florida Center for Environmental Policy, Gainesville. 610 pp. (ISBN: 978-0-9707325-5-2) 
3. Brown, M.T., D. Campbell, S.L. Huang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.) 2009. Emergy Synthesis 5: Theory and Applications of the Emergy Methodology. University of Florida Center for Environmental Policy, Gainesville. 612 pp. (ISBN 978-0-9707325-4-5)
4. Brown, M.T., D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.) 2007. Emergy Synthesis 4: Theory and Applications of the Emergy Methodology. University of Florida Center for Environmental Policy, Gainesville. 390 pp. (ISBN 0-9707325-3-8)
5. Brown, M.T., D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.) 2005. Emergy Synthesis 3: Theory and Applications of the Emergy Methodology. University of Florida Center for Environmental Policy, Gainesville. 572 pp. (ISBN 0-9707325-2-X)
6. Brown, M.T., H.T. Odum, D.R. Tilley and S. Ulgiati, (eds.) 2003. Emergy Synthesis 2: Theory and Applications of the Emergy Methodology.  University of Florida, Center for Environmental Policy, Gainesville. 432 pp. (ISBN 0-9707325-1-1) 
7. Brown, M.T., S. Brandt-Williams, D.R. Tilley and S. Ulgiati, (eds.), 2000. Emergy Synthesis: Theory and Applications of the Emergy Methodology. Center for Environmental Policy, University of Florida, Gainesville. 328 pp. (ISBN 0-9707325-0-3) 

Braham, W.W., M. Hou, S. Prabhakaran, D. Tilley, 2023. Embodied carbon in biogenic and earth materials: Accounting for the work of the biogeosphere in construction materials, in Rahman Azari (ed.), The Routledge Handbook on Embodied Carbon in the Built Environment (Routledge). eISBN: 9781003277927

Winfrey, B.K., D.R. Tilley, 2013. Comparison of principles for allocating emergy to recycled materials in natural and managed ecosystems. In: Emergy Synthesis 7: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, D.S. Kang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.). Center for Environmental Policy, Gainesville, FL. 

Campbell, E.T., D.R. Tilley, 2013. Valuing Ecosystem Services from Maryland Forests. In: Emergy Synthesis 7: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, D.S. Kang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.). Center for Environmental Policy, Gainesville, FL. 

Tilley, D.R., 2012. Green wall research. In: The Rise of Living Architecture. Green Roofs for Healthy Cities, Toronto. p. 70

Tilley, D.R., 2011. Mathematical Revisions to Odum’s Dynamic Emergy Accounting. In: Emergy Synthesis 6: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, S.L. Huang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.). Center for Environmental Policy, Gainesville, FL. pp. 583-598 (ISBN: 978-0-9707325-5-2)

Campbell, E.T., D.R. Tilley, 2011. Emergy Synthesis for Valuing the Hydrologically Driven Ecosystem Services of Forest Lands. In: Emergy Synthesis 6: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, S.L. Huang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.). Center for Environmental Policy, Gainesville, FL. pp. 105-110 (ISBN: 978-0-9707325-5-2)

Price, J., D.R. Tilley, 2011. Emergy evaluation of a green facade. In: Emergy Synthesis 6: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, S.L. Huang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.). Center for Environmental Policy, Gainesville, FL. pp. 213-222 (ISBN: 978-0-9707325-5-2)

Winfrey, B.K., D.R. Tilley 2011. A New Index for Comparing Wastewater Treatment Scenarios. In: Emergy Synthesis 6: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, S.L. Huang, E. Ortega, T. Rydberg, D.R. Tilley, S. Ulgiati (eds.). Center for Environmental Policy, Gainesville, FL. pp. 223-238 (ISBN: 978-0-9707325-5-2)

Tilley, D.R., E. Felix, 2009. Perpetuation of partial transformities through sequential analyses for refined emergy accounting and index development. In: Emergy Synthesis 5: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati, eds).  Center for Environmental Policy, Gainesville, FL. pp. 569-580

Schramski, J.R., D.R. Tilley, T.L. Carter, N. Rustagi, 2009. Comparative Emergy Synthesis for Green Engineering. In: Emergy Synthesis 5: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati, eds).  Center for Environmental Policy, Gainesville, FL. pp. 207-222

Rustagi, N., D.R. Tilley, J.R. Schramski, 2009. Total energy requirements of a living extensive green roof. In: Emergy Synthesis 5: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati, eds).  Center for Environmental Policy, Gainesville, FL. pp. 223-234

Schumann, L.S., D.R. Tilley, 2009. Emergy Evaluation of a Green Cloak:  A Lightweight Alternative to Conventional Green Roofs. In: Emergy Synthesis 5: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati, eds). Center for Environmental Policy, Gainesville, FL. pp. 235-244

Martin, J.F., D.R. Tilley, 2007. Accounting for environmental sustainability with emergy analysis. In: Encyclopedia of Soil Science (Lal, R. ed.). Taylor & Francis, New York Available at: http://www.informaworld.com/10.1081/E-ESS-120041214

Tilley, D.R., J.F. Martin, 2006. Environmental accounting of agricultural sustainability using emergy analysis. In: Systems Analysis and Modeling in Food and Agriculture, Encyclopedia of Life Support Systems (EOLSS) (K.C. Ting, D.H. Fleisher, L.F. Rodriguez, eds.) United Nations Educational, Scientific and Cultural Organization (UNESCO), Eolss Publishers, Oxford, UK. (http://www.eolss.net)

Comar, V., D.R. Tilley, E. Felix, M.V. Turdera, M. C. Neto, 2005. Comparative emergy evaluation of Castorbean (Ricinus communis L.) production systems in Brazil and the U.S. In: Advances in Energy Studies: Energy-ecology issues in Latin America. (E. Ortega and S. Ulgiati, eds.). UNICAMP, Grafica da Universidade Estadual de Campinas, Brazil.

Tilley, D.R. 2005. Historical solar emergy use in the United States and its relation to technological development.  In: Emergy Synthesis 3: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati, eds).  Center for Environmental Policy, Gainesville, FL.

Ganeshan, P. and D.R. Tilley, 2005. Emergy evaluation of air biofilters for carbon monoxide removal. In: Emergy Synthesis 3: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati, eds).  Center for Environmental Policy, Gainesville, FL.

Izursa, J.L. and D.R. Tilley, 2005. Emergy analysis of Bolivia’s natural gas. In: Emergy Synthesis 3: Theory and Applications of the Emergy Methodology. (M.T. Brown, D. Campbell, V. Comar, S.L. Huang, T. Rydberg, D.R. Tilley, S. Ulgiati, eds).  Center for Environmental Policy, Gainesville, FL.

Tilley, D.R. 2003.  Spectral transformities for solar radiation reaching the Earth.  In: Emergy Synthesis 2: Theory and Applications of the Emergy Methodology. (M.T. Brown, H.T. Odum, D.R. Tilley and S. Ulgiati, eds).  Center for Environmental Policy, Gainesville, FL. 

Tilley, D.R. and M.T. Brown, 2000.  The hierarchical pattern of energy flow in ecological-economic systems representing three geographic scales.  In: Emergy Synthesis: Theory and Applications of the Emergy Methodology. (M.T. Brown, S. Brandt-Williams, D.R. Tilley and S. Ulgiati, eds). Center for Environmental Policy, University of Florida, Gainesville.

Martin, J.F. and D.R. Tilley, 2000.  Simulating with STELLA©.  In: Modeling for All Scales: An Introduction to Systems Simulation, H.T. Odum and E.C. Odum. Academic Press, San Diego. 

Brown, M.T., S. Brandt-Williams, D.R. Tilley and S. Ulgiati, 2000. Emergy synthesis: An introduction. In: Emergy Synthesis: Theory and Applications of the Emergy Methodology. Brown, M.T., S. Brandt-Williams, D.R. Tilley and S. Ulgiati, (eds.).  Center for Environmental Policy, University of Florida, Gainesville.

1. Tilley, D.R., 2024. Custom GPT’s as a Teaching Assistant. University of Maryland Teaching & Learning Transformation Center: Artificial Intelligence Learning Community, College Park. 
2. Tilley, D.R., 2023. A Nature-Based Academic Journey in Ecological Engineering: How a Launch from Wetlands Can Land You in Eco-Socio-Artificial Space. H.T. Odum Center for Wetlands, University of Florida, Water, Wetlands, and Watersheds Seminar https://youtube.com/live/ptROyDQmPUk?feature=share
3. Tilley, D.R., 2023. AI: YOUR PAST & FUTURE. Lecture given to CPET100 College Park Scholars: Environment, Technology & Economy First-Year Colloquium I, University of Maryland College Park
4. Tilley, D.R., 2023. Eco-Space-Time Continuum: Adaptation to Nature-based Systems! and their Rhythms? Lecture given to PLSC 425 Green Roofs and Urban Sustainability, University of Maryland College Park
5. Tilley, D.R., 2022. Self-designing the green economy: how to foster more environmental innovation and entrepreneurship. Lecture given to PLSC 425 Spring 2022 University of Maryland College Park
6. Tilley, D.R., 2022. Greening DuVal High School’s (Lanham, MD) campus and curriculum with cool green shelters and environmental entrepreneurship. Lecture to the DuVal HS Environmental Club.
7. Tilley, D.R., 2019. How did I get here? Danger, mentors and pivots. My Story for the UMD STEWARDS co-hort. November 13, 2019.
8. Tilley, D.R., 2015 (invited panel). What’s new in green roof and wall research in North America. CitiesAlive: 13^th Annual Green Roof and Wall Conference, Brooklyn, NY October.
9. Tilley, D.R., 2014 (invited panel). What green roof and wall research is going on at North America’s universities? Wet Living Architecture: the case for an eco-hydrologic network of green roofs, wetlands, rain gardens and other water storing technologies in the built environment. CitiesAlive: 12^th Annual Green Roof and Wall Conference, Nashville, November 12-14 Available online: http://www.citiesalive2014.webcast.guru
10. Tilley, D.R., 2014 (invited). Ecological Engineering: History, Principles and Current Research. Colloquium on Engineering, Ecology and Landscape, Department of Landscape Architecture, Graduate School of Design, Harvard University, Boston April 25^th
11. Tilley, D.R., 2014 (invited). After Growth: urban adaptation to the rhythms of cyclical power from renewable energy systems. Colloquium on After Growth: Designing the Environmental Settlement, Masters in Environmental Building Design, School of Architecture, University of Pennsylvania, April 11^th, Philadelphia
12. Tilley, D.R., 2014 (invited). Energy-based approaches to valuing the ecological benefits of ecologically engineered systems in urban environments: experiences in North America. JINSHI Conference, School of Environment, Beijing Normal University, China June 20^th
13. Tilley, D.R., 2014 (invited). Energy, Emergy, Water Use, and Plant Growth of Living Architecture: experiences with green roofs, green walls and wetland gardens in the built environment of North America. School of Environment and Energy, Peking University, Shenzhen, China, June 16^th
14. Tilley, D.R., 2014 (invited). Energy, Emergy, Water Use, and Plant Growth of Living Architecture: experiences with green roofs, green walls and wetland gardens in the built environment of North America. South China Botanical Garden, Chinese Academy of Sciences, China, June 18^th
15. Tilley, D.R., 2013 (invited panel). Energy/Water Conservation with Green Walls Technology. Cities Alive: 11th Annual Green Roof and Wall Conference, CitiesAlive.org San Francisco Oct. 23-26
16. Tilley, D.R., J.W. Price, S. Matt, B. Marrow, 2013 (invited). Thermal and growth properties of green facades. Cities Alive: 11th Annual Green Roof and Wall Conference, CitiesAlive.org San Francisco Oct. 23-26
17. Tilley, D.R., 2012 (invited panel). Modelling unsustainability reduction in the current century: indicators and policies. 4th International Ecosummit: Ecological Sustainability—Restoring the Planet’s Ecosystem Services, Columbus, OH http://www.ecosummit2012.org/conference-program.html
18. Tilley, D.R., E.T. Campbell, 2012 (invited). Emergy basis for paying land stewards to produce ecosystem services. 4th International Ecosummit: Ecological Sustainability—Restoring the Planet’s Ecosystem Services, Columbus, OH http://www.ecosummit2012.org/conference-program.html
19. Tilley, D.R., 2012 (invited). The vitality of ecotechnological fundamentalism for prosperity. 4th International Ecosummit: Ecological Sustainability—Restoring the Planet’s Ecosystem Services, Columbus, OH http://www.ecosummit2012.org/conference-program.html
20. E.T. Campbell, Tilley, D.R., 2012 (invited). Emergy and Biodiversity. 4th International Ecosummit: Ecological Sustainability—Restoring the Planet’s Ecosystem Services, Columbus, OH http://www.ecosummit2012.org/conference-program.html
21. Tilley, D.R., 2011 (invited panel). The Effects of Indoor Greening and Current Research: Leading Experts from Around the Globe Panel Discussion. 9th Annual Green Roofs for Healthy Cities, CitiesAlive.org Philadelphia Nov. 30-Dec. 1
22. Tilley, D.R., A.H. Baldwin, P.C. Kangas, S. Lansing, 2011 (invited). Energy & Environmental Solutions through Ecological Engineering Design. ENST Department Workshop for Anhui University (China). October 19.
23. Tilley, D.R., J.W. Price, 2011 (invited). Green Infrastructure for Improved Thermal
    Performance of Buildings. Green Building Tools for Energy Savings and Climate Protection, Metropolitan Washington Council of Governments, Regional Best Practices Workshop. May 5, 2011
24. Tilley, D.R., J.W. Price, 2011 (invited). Effects of Vertical Vegetation on Thermal
    Balance of Buildings. Metropolitan Washington Council of Governments, Department of Environmental Programs. June 9, 2011
25. Tilley, D.R., 2010 (invited panel). Future Directions on Greening the Green Roof System for Climate Change – Emergy, Embodied Energy, Renewables, Thermal Efficiency, Sequestration. 8th Annual Green Roof and Walls Conference, Cities Alive, Vancouver
26. Tilley, D.R., A. Gardner, M. Simon, M. Binder, K. Herold, B. Williams, 2010 (invited). Living Systems for Energy and Water Conservation in the Built Environment. Maryland Water Resources Research Symposium, College Park. October 28th.
27. Tilley, D.R., 2010 (invited). WaterShed for Water: Intellectual & Ecological Inspirations. University of Maryland School of Architecture, Planning and Preservation: Solar Decathlon Fall 2010 Kick-off Symposium.
28. Tilley, D.R., A. Gardner, M. Simon, M. Binder, K. Herold, B. Williams, 2010 (invited). Water-Wise Through Living Systems for the Built Environment. University of Maryland Clark School of Engineering Sustainability Workshop, College Park, MD
29. Tilley, D.R., J.W. Price, 2010 (invited). Thermal properties of green facades. American Society of Landscape Architecture Annual Meeting and Expo, Washington, D.C. September 19th.
30. Tilley, D.R., P. Kangas, J. Price, P.J. Klavon, 2009 (invited). Energy Solutions through Ecological Engineering Design. Maryland-Asia Environmental Partnership, College Park, MD
31. Tilley, D.R., 2009 (invited). Ecological Engineering and Energy Accounting: Design and Decision-making to promote the free services of ecosystems. Ecologie Fonctionnelle et Biogéochimie des Sols, SupAgro-INRA-IRD (Montpellier, France)
32. Tilley, D.R., 2008 (invited). Gray to Green: vine canopies for covering hot urban surfaces. The Green Living Workshop. Hunt Valley, MD. August 20.
33. Tilley, D.R., 2007 (invited). Environmental Accounting: Emergy and Systems Ecology Perspective for National Statistics. Seminar given to China's National Bureau of Statistics, Department of Social Science & Technology Statistics organized by Triway Enterprise, Inc., Arlington, VA.
34. Tilley, D.R., 2007 (invited). Designing and Appreciating Ecosystem Services for an Energy-constrained Planet: Green Cloaks and Ecological Investment Corporations. Smithsonian Environmental Research Center, August 9, Edgewater, MD
35. Tilley, D.R., 2007 (invited). Green Opportunities for Ecosystems that Solve Environmental Problems. Keynote Address given to American Water Resources Association, Mid-Atlantic Conference, Green opportunities for a Blue Resource: an economic perspective, September 19-21, Newark, DE
36. Tilley, D.R., 2007 (invited). Ecological Investment Corporation: A Market-based System that Encourages Land Stewards to Produce Ecosystem Services for Consumers. Maryland Emergy LDI Workshop, August 29, 2007, Maryland Department of Natural Resources, Annapolis, MD
37. Tilley, D.R., 2007 (invited). Progress on the Campus Greenhouse Gas Emissions Inventory, University of Maryland, Office of Sustainability, College Park, MD
38. Tilley, D.R., 2007 (invited). Emergy for Integrated Systems Evaluation: national metabolism and bio-fuels. Systems & Engineering Ecology Group, University of Georgia, Athens, GA
39. Tilley, D.R., 2007 (invited). When are Technologies Truly “Green”? Technologies for the Green Industry, Maryland Cooperative Extension, Baltimore, MD.
40. Tilley, D.R., 2007 (invited). Emergy Accounting for Estimating the Ecological Return on Restoration Investment. Biohabitats, Inc. Baltimore, MD
41. Tilley, D.R. 2006 (invited). Ecological Engineering: Sustainable Design for New Nature-Human Symbioses. TARDIS 2006: Trans-Atlantic Research & Development Interchange on Sustainability, September 11-13, 2006, Estes Park, CO. Sponsored by USEPA-Office of Research and Development and the Austrian Federal Ministry of Education.
42. Tilley, D.R. 2006 (invited). Wastewater treatment wetlands ecology and design: Lessons for ditch management. Ditch Project Symposium: Improved Management of Agricultural Drainage Ditches for Water Quality Protection, University of Maryland, College Park.
43. Tilley, D.R. A.H. Baldwin, E. Felix, P. Ganeshan, E. Jenkins, J. Mentzer and L. Schumann, 2006 (invited). Ecological Engineering Design, Modeling and Assessment of Energy, Wetlands and Air for Nature-Humanity Symbiosis. University of Maryland Natural Resource Sciences and Landscape Architecture, College Park, Md.
44. Tilley, D.R. A.H. Baldwin, E. Felix, P. Ganeshan, J.L. Izursa, J. Mentzer and E. Poynter Jenkins 2005 (invited). Ecological engineering and wetland hyperspectral radiometry. University of Maryland Center for Environmental Science, Appalachian Lab, Frostburg.
45. Tilley, D.R., A.H. Baldwin, and E. Poynter Jenkins, 2005 (invited). Detection of nitrogen fertilization in freshwater marshes based on partial least squares regression of hyperspectral reflectance. University of Maryland Center for Environmental Science, Horn Point Lab, Cambridge.
46. Tilley, D.R., 2005 (invited). Derivation of transformities for co-products from black-box systems by uncovering latent structures: a partial least squares regression solution to the allocation problem. March 24, 2005. Environmental Engineering Sciences, Systems Seminar, University of Florida, Gainesville.
47. Tilley, D.R., E. Felix, P. Ganeshan, J.L. Izursa, J. Mentzer and E. Poynter, 2004 (invited). Emergy, Ecology, Economy and Industry: A systems perspective for their integration. Development: Ecology, Economics, Ethics Seminar (MEES 608N) hosted by the Ecological Economics Group, University of Maryland, College Park.
48. Tilley, D.R., 2004 (invited).  Ecological engineering: an energy basis for the design of sustainable systems of environment and humanity. The Center for Science Exploration, Hampshire College, Five Colleges, Inc., Amherst, Massachusetts.
49. Tilley, D.R., 2003 (invited). Ecosystems, Energy and Emergy: Evolving Ecological Engineering Designs.  University of Maryland Center for Environmental Science, Chesapeake Bay Laboratory, Solomons.
50. Tilley, D.R., 2002 (invited). SpaceShip Earth: Connections, Power and Nature. University of Maryland Civicus Student Group (BSOS 399P).
51. Tilley, D.R., 2002 (invited).  Energy systems models for quantifying the network connections between ecology and economy: the case of ecosystem management in the Southern Appalachians.  Development: Ecology, Economics, Ethics Seminar (MEES 608N) hosted by the Ecological Economics Group, University of Maryland, College Park.
52. Tilley, D.R., 2002 (invited).  Emergy-based spatial, temporal and optimization simulation models for ecosystem management of forested watersheds.  Biological Resources Engineering Department Seminar, University of Maryland, College Park.
53. Tilley, D.R. 2001 (invited).  Ecological decision-making using emergy synthesis: the case of the US Forest Service Ecosystem Management Demonstration Project. Environmental Sciences Seminar, The Ohio State University, Columbus.
54. Tilley, D.R., 2000 (invited). Energy systems models for synthesizing the ecological-economic interface between National Forests and regional economies.  The Swedish University for Agricultural Sciences, Uppsala.
55. Swank, W.T. and D.R. Tilley, 2000 (invited). Watershed management contributions to land stewardship: case studies in the Southeast. U.S. Forest Service, Rocky Mountain Research Station Conference on Land Stewardship in the 21^st Century: the contributions of watershed management, March 13-16, 2000, Tucson, AZ.
56. Tilley, D.R., 1996 (invited).  Wetland networks and simulation models for managing stormwater in south Dade County.  St. John’s River Water Management District, Palatka, Florida.
57. Tilley D.R., 2023. THE ENERGETIC AND TRANSFORMATIONAL MAGIC OF THE H.T. ODUM CENTER FOR WETLANDS DURING THE 1990's, Presentation at the 23nd Annual Meeting of Am. Eco. Eng. Soc. (AEES) and 50th Anniversary of the H.T. Odum Center for Wetlands, Tampa June 2023
58. Tilley D.R., N. Cloyd, K. Sonneveldt, 2022. An eco-entrepreneurial learning journey to commercialize an eco-innovation: epiphanies & excitement, failure & anxiety, success & learning. Presentation at the 22nd Annual Meeting of Am. Eco. Eng. Soc. (AEES), Baltimore June 2022
59. Tilley, D.R., 2015. Resilience of ecologically engineered systems based on emergy information theory.  15th Annual American Ecological Engineering Society Meeting, Stillwater, Oklahoma. 
60. Thompson, R., D.R. Tilley, 2015. Retention and Thermal Performance of a Thin Sloped Green Roof on a Sustainable Home. CitiesAlive: 13th Annual Green Roof and Wall Conference, Brooklyn. 
61. Tjaden, S., D.R. Tilley, 2015. A Coupled Analysis of Moisture and Thermal Heat Transfer within a Thin Green Roof System. CitiesAlive: 13th Annual Green Roof and Wall Conference, Brooklyn.
62. Tilley, D.R, R. Thompson, S. Tjaden, 2014. Water sustainability of living architecture in a residential home and stormwater runoff from a sloped green roof. CitiesAlive: 12^th Annual Green Roof and Wall Conference, Nashville. Available: http://www.citiesalive2014.webcast.guru
63. Tilley, D.R., S. Tjaden, S.,, R. Thompson, 2014. Water sustainability with living architecture: integrative design of a green roof, a constructed wetland, and a rain garden. CitiesAlive: 12^th Annual Green Roof and Wall Conference, Nashville. Available: http://www.citiesalive2014.webcast.guru
64. R. Thompson, S. Tjaden, Tilley, D.R., 2014. Stormwater benefits of a thin modular green roof. CitiesAlive: 12^th Annual Green Roof and Wall Conference, Nashville. Available: http://www.citiesalive2014.webcast.guru
65. Tilley, D.R. 2014. Serious learning games for ecological design. 14th Annual American Ecological Engineering Society Meeting, June 2014, Charleston, SC.
66. Williamson, T.R., D.R. Tilley, 2014. Evaluating the sustainability and natural subsidy of the oyster aquaculture industry in Maryland. 14th Annual American Ecological Engineering Society Meeting, June 2014, Charleston, SC.
67. Tjaden, S., D.R. Tilley, 2014. Stormwater runoff from a sloped greenroof located in the Mid-Atlantic region of North America. 14th Annual American Ecological Engineering Society Meeting, June 2014, Charleston, SC
68. Bresee, A., D. Erbe, C. Omkar, S. Paulson, H. Koliji, D. Tilley, 2014. Double-sided modular living green wall. 14th Annual American Ecological Engineering Society Meeting, June 2014, Charleston, SC
69. Tjaden, S., D.R. Tilley, 2013. Integrated Water & Energy Monitoring of the Living Technologies of WaterShed; The 2011 Solar Decathlon Winning Sustainable Home. 13th Annual American Ecological Engineering Society Meeting, June 2013, Lansing, MI
70. Williamson, T.R., D.R. Tilley, Y. Tao, 2013. The effect of sphagnum moss, UV-C sterilization, and an Algal Turf Scrubber in a Recirculating Aquaculture System.  13th Annual American Ecological Engineering Society Meeting, June 2013, Lansing, MI.  
71. Winfrey, B.K. and D.R. Tilley, 2013. Improvements to Dynamic Emergy Accounting of Cycling Material. 13th Annual American Ecological Engineering Society Meeting, June 2013, Lansing, MI.  
72. Moss, A.R., S.A. Lansing, D.R. Tilley, K.H. Klavon, 2013. Sustainability of Small- Scale Anaerobic Digestion Systems for Generating Methane from Waste in Temperate and Tropical Climates. 13th Annual American Ecological Engineering Society Meeting, June 2013, Lansing, MI.  
73. Tilley, D.R., 2013. Sustainability metrics for living architecture. 13th Annual American Ecological Engineering Society Meeting, June 2013, Lansing, MI.  
74. Tilley, D.R., J.W. Price, S. Matt, B. Marrow 2012. Energy Benefits of Green Facades. 10th Annual Green Roof for Healthy Cities: CitiesAlive.org, Chicago.
75. Winfrey, B.K. and D.R. Tilley. 2012. Comparison of Principles for Allocating Emergy to Recycled Materials in Natural and Managed Ecosystems (Presentation) Emergy and Environmental Accounting 7th Biennial Conference, January 2012, Gainesville, FL.  
76. Campbell, E.T. and D.R. Tilley. 2012. Fair payment prices and public values of ecosystem services based on emergy synthesis (Presentation) Emergy and Environmental Accounting 7th Biennial Conference, January 2012, Gainesville, FL.  
77. Campbell, D.E., E.T. Campbell, H.F. Lu and D.R. Tilley. 2012. Emergy and non-market value (Poster) Emergy and Environmental Accounting 7th Biennial Conference, January 2012, Gainesville, FL.  
78. Winfrey, B.K. and D.R. Tilley. 2012. Recycling of Mass and Emergy in Natural and Human-Dominated Systems. 12th Annual American Ecological Engineering Society Meeting, June 2012, Syracuse, NY.  
79. Tilley, D.R., J.W. Price, S. Matt, 2011. Heat Flux, Water Use, and Plant Growth of Vertical Living Architecture. 9th Annual Green Roof for Healthy Cities: CitiesAlive.org, Philadelphia.
80. Tilley, D.R., J.W. Price, E. Campbell, L.M. Schumann, 2010. Emergy synthesis for valuing the ecosystem services of green walls and other vegetated building envelope technologies. 10th Annual meeting to the American Ecological Engineering Society, Quebec
81. Tilley, D.R., J.W. Price, 2010. Effects of Vertical Vegetation on Thermal Balance of Buildings. 8th Annual Green Roofs and Walls Conference, Vancouver.
82. Tilley, D.R., 2010. Dynamic Emergy Accounting: a review, mathematical revisions, & implications for modeling emergy recycling. 6th Biennial Emergy Research Conference, January 14-16, 2010. University of Florida Center for Environmental Policy, Gainesville
83. Price, J., D.R. Tilley, 2010. Emergy evaluation of a green facade. 6th Biennial Emergy Research Conference, January 14-16, 2010. University of Florida Center for Environmental Policy, Gainesville
84. Winfrey, B.K., D.R. Tilley, 2010. A Comparison of the Total Emergy Requirements and Human Risks of Treating Municipal Wastewater to Background Conditions using Conventional Systems and Wetlands. 6th Biennial Emergy Research Conference, January 14-16, 2010. University of Florida Center for Environmental Policy, Gainesville
85. Campbell, E.T., D.R. Tilley, 2010. Emergy synthesis of hydrologic ecosystem services from forest lands. 6th Biennial Emergy Research Conference, January 14-16, 2010. University of Florida Center for Environmental Policy, Gainesville
86. Schumann, L.M., D.R. Tilley, 2008. Green vine canopies for restoring ecological benefits to all urban surfaces. 8^th Annual meeting of the American Ecological Engineering Society, June 11-13, Blacksburg, VA.
87. Tilley, D.R., E. Felix, 2008. Perpetuation of partial transformities through sequential analyses for refined emergy accounting and index development. 5th Biennial Emergy Research Conference, January 31-February 2, 2008.  University of Florida Center for Environmental Policy, Gainesville
88. Izursa, J.L., D.R. Tilley, P. Kangas, 2008. Measurement of the sustainability of tropical certified forestry using emergy analysis. 5th Biennial Emergy Research Conference, January 31-February 2, 2008. University of Florida Center for Environmental Policy, Gainesville
89. Rustagi, N., D.R. Tilley, J. Schramski, 2008. Emergy analysis of living green roofs. 5th Biennial Emergy Research Conference, January 31-February 2, 2008.  University of Florida Center for Environmental Policy, Gainesville
90. Schumann, L.M., D.R. Tilley, 2008. Emergy evaluation of a green cloak: a lightweight alternative to conventional green roofs. 5th Biennial Emergy Research Conference, January 31-February 2, 2008.  University of Florida Center for Environmental Policy, Gainesville
91. Schramski, J.R., D.R. Tilley, T.L. Carter, 2008. Data Collection, Assumptions, and Synthesis for Comparative Embodied Energy Analysis for Green Engineering. 5th Biennial Emergy Research Conference, January 31-February 2, 2008.  University of Florida Center for Environmental Policy, Gainesville
92. Felix, E., D.R. Tilley, 2007. Ecological modeling of cellulosic production systems for bioenergy. ASABE International Meeting, June, Minneapolis, MN.
93. Tilley, D.R., 2007. Implications of pulsing dynamics on sustainability. 7^th Annual meeting of the American Ecological Engineering Society, May 22-24, Manhattan, KS.
94. Agarwal, N., S. Ahearn, S. Khan, D. Marcin, D. Venkatachari, R. Vocke III, M. Shofnos, E. Skoda, N. Soni, D.R. Tilley, 2007. Bacterial resistant to common antibiotics in Maryland wetlands. 7^th Annual meeting of the American Ecological Engineering Society, May 22-24, Manhattan, KS.
95. Agarwal, N., S. Ahearn, S. Brooks, J. Hart, S. Khan, D. Marcin, D. Venkatachari, R. Vocke III, M. Shofnos, E. Skoda, N. Soni, D.R. Tilley, 2006. Antibiotic resistant Escherichia coli in non-tidal wetlands of Maryland. 9^th Annual Wetlands and Watershed Workshop, October 23-26, Atlantic City, New Jersey.
96. Tilley, D.R., L.M. Schumann, A.H. Baldwin, 2006. Partial least squares modeling of wetland plant hyperspectral reflectance for heavy metal detection. ASABE International Meeting, July 9-12, Portland, Oregon.
97. Schumann, L.M., D.R. Tilley, 2006. Lightweight green roof technology for temperature control of existing sloped roof buildings.  Sixth Annual meeting of the American Ecological Engineering Society, April 13-14, Berkeley, CA.
98. Tilley, D.R., 2006. Coal mine carbon monoxide control using air biofilters: feasibility and design considerations. Sixth Annual meeting of the American Ecological Engineering Society, April 13-14, Berkeley, CA.
99. Felix, E., D.R. Tilley, G. Felton, 2006. Modeling above-ground biomass production of hybrid poplar tree (Populus spp.) farm using biosolids as a remediation tool. Sixth Annual meeting of the American Ecological Engineering Society, April 13-14, Berkeley, CA.
100. Tilley, D.R., 2006. Partial least squares regression for co-product allocation in emergy-based environmental accounting. 4th Biennial Emergy Research Conference, January 19-21, 2006.  University of Florida Center for Environmental Policy, Gainesville.
101. Felix, E., D.R. Tilley, 2006. Environmental accounting of ethanol production from switchgrass (Panicum virgatum) in the U.S. using emergy evaluation. 4th Biennial Emergy Research Conference, January 19-21, 2006.  University of Florida Center for Environmental Policy, Gainesville.
102. Poynter, E.E., D.R. Tilley, A.H. Baldwin, 2005. Quantification of sub-surface water nitrogen levels in tidal freshwater marshes using hyperspectral reflectance. (Paper No. 051044) ASAE International Meeting, July 17-20, 2005, Tampa, Florida.
103. Felix, E.R., D.R. Tilley, V. Comar, M.V. Turdera, M.C. Neto, 2005. Environmental accounting of Castorbean (Ricinus communis L.) production systems in the U.S. and Brazil using emergy evaluation. (Paper No. 058020) ASAE International Meeting, July 17-20, 2005, Tampa, Florida.
104. Tilley, D.R., P. Ganeshan, J. Mentzer, 2005. Environmental accounting for soil ecosystem work performed to remove carbon monoxide from engine exhaust. (Paper No. 057019) ASAE International Meeting, July 17-20, 2005, Tampa, Florida.
105. Tilley, D.R., A.H. Baldwin, E.P. Jenkins, 2005. Modeling emergent macrophyte response to nitrogen fertilization based on partial least squares regression of hyperspectral leaf reflectance. 26^th Annual Meeting of Society of Wetland Scientists, June 6-9, 2005, Charleston, S.C.,
106. Tilley, D.R., E.P. Jenkins, A.H. Baldwin, 2005. Partial least squares regression modeling of wetland hyperspectral reflectance to detect response to nitrogen fertilization. Fifth Annual meeting of the American Ecological Engineering Society, May 18-20, Columbus, OH.
107. Tilley, D.R., P. Kangas, A.H. Baldwin, 2005. Ecological Engineering at the University of Maryland: adapting to a dynamic system. Panel Session: Developing Fundamental Ecological Engineering Knowledge, Fifth Annual meeting of the American Ecological Engineering Society, May 18-20, Columbus, OH.
108. Jenkins, E.P., A.H. Baldwin, D.R. Tilley, 2005. Modeling vegetation characteristics using hyperspectral reflectance and partial least squares regression in tidal freshwater marshes. Fifth Annual meeting of the American Ecological Engineering Society, May 18-20, Columbus, OH.
109. Ganeshan, P. and D.R. Tilley, 2004. Biofilter removal of carbon monoxide from air-mixed and engine-generated sources under various operating conditions. Bioscience Research and Technology Review Day, University of Maryland, College Park, November 4.
110. Tilley, D.R., H. Badrinarayanan, J.H. Son, 2004. Development of an ecosystem model (MARSHDO) for assessing oxygen demand in a recirculating shrimp aquaculture treatment wetland. 2004 ASAE/CSAE Annual International Meeting, Ottawa, Ontario, Canada, August 1-4.
111. Tilley, D.R. and P. Ganeshan, 2004. Control of Lethal Poisons with Soil Ecosystem Machinery. Fourth annual meeting of the American Ecological Engineering Society, June 9-11, Fayetteville, AR. www.aeesociety.org
112. Tilley, D.R., 2004. Solar transformities of modern technologies estimated from historical emergy use in the United States. 3^rd Biennial Emergy Research Conference, January 29-31, 2004.  Center for Environmental Policy, Department of Environmental Engineering Sciences, University of Florida, Gainesville.
113. Ganeshan P. and D.R. Tilley, 2004. Emergy Evaluation of Air Biofilters for Carbon Monoxide. 3^rd Biennial Emergy Research Conference, January 29-31, 2004.  Center for Environmental Policy, Department of Environmental Engineering Sciences, University of Florida, Gainesville.
114. Izursa J.L.  and D.R. Tilley, 2004. Emergy Analysis of Bolivian Natural Gas. 3^rd Biennial Emergy Research Conference, January 29-31, 2004.  Center for Environmental Policy, Department of Environmental Engineering Sciences, University of Florida, Gainesville.
115. Tilley, D.R. and P. Ganeshan, 2003. Environmental accounting of air biofiltration using an emergy-based life-cycle assessment approach.  AVS 50^th International Symposium and Exhibition, November 2-7, 2003, Baltimore, Maryland.
116. Ganeshan, P. and D.R. Tilley, 2003. Carbon monoxide removal rates of biofilters. Third annual meeting of the American Ecological Engineering Society, May 28-30, College Park, MD.  www.bre.umd.edu/aees2003/
117. Izursa, J.L. and D.R. Tilley, 2003. Emergy analysis of the Bolivian forest system. Third annual meeting of the American Ecological Engineering Society, May 28-30, College Park, MD. www.bre.umd.edu/aees2003/
118. Tilley, D.R., M. Ahmed, J.H. Son, H. Badrinarayanan, 2003. Narrow waveband reflectance of emergent macrophytes as an indicator of wetland water quality. Third annual meeting of the American Ecological Engineering Society, May 28-30, College Park, MD. www.bre.umd.edu/aees2003/
119. Jones, K.D., E. Hanna, D.R. Tilley, 2003. Evaluation of an Ecological Engineering Approach to Shoreline Restoration at Loyola Beach, Texas. Third annual meeting of the American Ecological Engineering Society, May 28-30, College Park, MD. www.bre.umd.edu/aees2003/
120. Tilley, D.R. 2002. Ecological engineering: Designing the ecosystem hardware and software for industrial ecology.  American Ecological Engineering Society Second Annual Meeting, April 28-30, Burlington, VT.
121. Tilley, D.R., W.T. Swank, M.T. Brown, 2001. Emergy synthesis for decision support in ecosystem management of forested watersheds. 2nd Biennial Emergy Research Conference, September 20-22, Gainesville, FL
122. Tilley, D.R. 2001. Wavelength specific solar transformities for solar radiation reaching the Earth. 2nd Biennial Emergy Research Conference, September 20-22, Gainesville, FL
123. Tilley, D.R. and M.T. Brown, 2000. Hierarchical pattern of energy diversity in ecological economic systems. Advances in Energy Studies: Exploring Supplies, Constraints, and Strategies, 2nd International Workshop. May 23-27, Porto Venere - La Spezia, Italy.
124. Tilley, D.R., 1999.  Ecological engineering and south Texas.  8th Annual South Texas Environmental Conference, Oct. 20-22, Corpus Christi, TX.
125. Tilley, D.R., 1999. The power of empower spectra in emergy evaluation: interpolating and extrapolating solar transformities and explaining system pulsing. First Biennial Emergy Analysis Research Conference, Sept. 2-4, Gainesville, FL.
126. Tilley, D.R., 1999. Simulating the temporal dynamics of solar transformity. First Biennial Emergy Analysis Research Conference, Sept. 2-4, Gainesville, FL.
127. Romitelli, M.S. and D.R. Tilley, 1999. Valuing estuarine ecosystems based on contributions from work upstream. 15th Biennial International Conference: Estuarine Research Federation ’99.  Sept. 25-30. New Orleans, LA
128. Tilley, D.R., 1998. Emergy basis of ecosystem management: valuing the work of nature and humanity. 42nd Annual meeting of the International Society for the Systems Sciences, Atlanta, GA.
129. Tilley, D.R. and M.T. Brown, 1997. Valuation of benefits derived from ecologically engineered stormwater wetlands.  Ecological Society of America 82nd annual meeting, Albuquerque, N.M.
130. Tilley, D.R., 1997.  Using emergy to evaluate ecosystem management. Wine Spring Creek ecosystem management project annual meeting, USDA Forest Service, Coweeta Hydrologic Lab, Otto, N.C.
131. Tilley, D.R., 1996.  Value of wetlands used to process stormwaters in coastal zones.  Fall joint meeting of the Atlantic Estuarine Research Society and the Southeast Estuarine Research Society, Pine Knoll Shores, N.C.
132. Brown, M.T., M.S. Romitelli, and D.R. Tilley, 1996. Introduction, application and potential of emergy to synthesize information on ecosystem management. Coweeta LTER (Long-term Ecological Research) Annual Meeting, Athens, GA.
133. Tilley, D.R. and M.T. Brown, 1996. Ecological engineering of wetland networks for stormwater management in low-relief, urbanized coastal watersheds. Ecological Summit 96, Copenhagen, Denmark.
134. Tilley, D.R. and M.T. Brown, 1995. An ecological engineering approach to watershed planning in urbanized south Dade County, Florida. Fourth Biennial Stormwater Research Conference, Clearwater, Florida.

Co-created and co-hosted the podcast Legacy of Howard T. Odum and Systems Ecology with Dr. Mark Brown (University of Florida). The series features interviews with Odum’s former students and colleagues to preserve his intellectual legacy and discuss the evolution and future of systems ecology. Episodes are shared via YouTube.

Tilley, D. (2025, June). Dr. Mark T. Brown, systems ecologist, emeritus professor University of Florida. Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=2-7qgGxqcLU

Tilley, D., Brown, M. (2024, November). Dr. Robert Knight, is an environmental scientist/systems ecologist and environmental entrepreneur. His research and practice focused on wetland engineering and science.. Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=0HhyTZqJ4Uk

Tilley, D., Brown, M. (2024, November). Dr. Shuli Huang, retired professor of Urban Ecology and Emergy Science, University of Taipei. Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=C34qZ7H9DYs

Tilley, D., Brown, M. (2024, June). Dr. Dan Campbell: Coastal ecologist and emergy scientist retired from Office of Research Development at US EPA (Episode #8). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=TOiSt5Ddea8

Tilley, D. (2024, June). Dr. Kathy Ewel is a Professor Emeritus at the University of Florida's School of Forest Resources and Conservation (Episode #7). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=ZvMg5r1Y9G8

Tilley, D., Brown, M. (2024, April). Dr. James Zucchetto: Systems ecologist & Energy engineer from the National Academies of Science (Episode #9). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=lDZg_-mn9F0

Tilley, D., Brown, M. (2024, March). Dr. William J. Mitsch: Pioneering wetland ecologist and ecological engineer from the Ohio State University (Episode #10). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=ahG9X_7zTz4

Tilley, D., Brown, M. (2024, March). Dr. Suzanne Bayley, Famed wetland ecologist from the University of Alberta (episode #6). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=BJmhU65IYh8

Tilley, D., Brown, M. (2024, March). Dr. Ariel Lugo: Famed forest hydroecologist, Director of the International Institute of Tropical Forestry, USDA Forest Service, Puerto Rico (Episode #5). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=m3oshBegmgs&t=3s

Tilley, D., Brown, M. (2024, February). Dr. Walter Boynton, Famed estuarine ecologist and ecosystem modeler from the University of Maryland Center for Environmental Science (Episode #4). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=lwHtbRZdlRQ

Tilley, D., Brown, M. (2024, February). Dr. John Day: Famed watershed ecologist and ecological engineer from Louisiana State University (Episode #3). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=BNxPe7AHu04&t=6s

Tilley, D., Brown, M. (2024, February). Dr. Charlie Hall Famed systems ecologist and energy analysts from the State University of New York: Environmental Science and Forestry (Episode #2). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=l64CRPbf024&t=12s

Tilley, D., Brown, M. (2024, January). Dr. Pat Kangas: Long-time systems ecologist, ecological engineering pioneer and Odum historian (Episode #1). Legacy of Howard T. Odum and Systems Ecology. https://www.youtube.com/watch?v=ih56ZtGE-e4