Villy Christensen is an ecosystem model with a background in fisheries science . He is known for his work as a project leader and core developer of Ecopath , an ecosystem modeling software widely used in fisheries management .  Ecopath was originally an initiative of the NOAA , but was originally developed at the UBC Fisheries Center of the University of British Columbia . In 2007, it was named as one of the biggest scientific breakthroughs in NOAA’s 200-year history. The citation states that Ecopath “revolutionized scientists’ ability worldwide to understand complex marine ecosystems”. 
Christensen did his Ph.D. under Sven Erik Jørgensen at Copenhagen University . Jeffrey Polovina initiated the Ecopath approach in the early 1980s.  Christensen, along with Daniel Pauly and others, has been involved in the subsequent development of Ecopath since 1990.  
Christensen currently facilitates international workshops on Ecopath around the world. He is a professor at the UBC Fisheries Center at the University of British Columbia , specializing in ecosystem modeling . His main project is with the Sea Around Us Project working on “database-driven ecosystem model construction”, with the aim of using “global, spatial databases to parameterize, balance and fit ecosystem models”.  This work includes exchange Developing a dynamic model of biomass over time in the Chesapeake Bay area, as well as how marine protected areas can be optimally Positioned. He is also director of the Lenfest Ocean Futures Project,  where a visualization system is being developed to support decision making in ecosystem-based fisheries management . This system combines Blender , a 3D-gaming engine, with Ecopath .    
- Wilson RW, Millero FJ, Taylor JR, Walsh PJ, Christensen V, Jennings S and Grosell M (2009) “Contribution of Fish to the Marine Inorganic Carbon Cycle” Science , 323 (5912) 359-362. (This article provides a first estimate of global fish biomass)
- Pauly D , Christensen V, Dalsgaard J, Froese R and Torres F (1998) “Fishing down marine food webs” [ permanent dead link ] Science , 279 : 860-863.
- Pauly D and Christensen V (1995) “Primary production required to sustain global fisheries” Nature 374 (6519): 255-257.
- Christensen V (1996) “Managing fisheries involving top predator and prey species components” [ permanent dead link ] Review in Fish Biology and Fisheries , 6 : 417-442. (First published description of “fishing on the food web” concept)
- Christensen V (1995) “Ecosystem maturity – towards quantification” Ecological Modeling , 77 : 3-32.
- Christensen V and Pauly D (1992) “ECOPATH II – A software for balancing steady-state ecosystem models and calculating network characteristics” Ecological Modeling , 61 : 169-185. (Third-most cited paper in this journal)
- Refereed publications
- Non-refereed publications
- Books and reports
- Jump up^ Ecopath with ECOSYMMain website.
- Jump up^ NOAA:ECOPATH Modeling: An Ecosystem Approach to Fisheries ManagementTop ten breakthroughs.
- Jump up^ Polovina JJ and Marten, GG (1982) “A comparative study of fish yields from various tropical ecosystems”. In: Pauly D and Murphy GI (Eds.)Theory and Management of Tropical Fisheries. ICLARM Conference Proceedings9, 255-286.
- Jump up^ Christensen V and Pauly D (1992)”ECOPATH II – A software for equilibrium steady-state ecosystem computing and calculating network characteristics” Ecological Modeling,61: 169-185.
- Jump up^ Christensen V and Walters CJ (2004)”Ecopath with Ecosim: Methods, Capabilities and Limitations” Ecological Modeling 172, 109-139
- ^ Jump up to:a b Dr. Villy Christensen UBC website. Retrieved June 17, 2009.
- Jump up^ Lenfest Ocean Futures Project
- Jump up^ MDM / UBC Ocean Viz Fisheries CollaborationYoutube.
- Jump up^ Fish Population Data Visualization BlenderNation, 9 April 2008
- Jump up^ Ocean120MB video.
- Jump up^ Ocean Summits and Virtual Fish: Games for a Sustainable Future