Villy Christensen

Villy Christensen ((C)Martin Dee)

  • Professor, PhD (Copenhagen)

Contact

  • Email: v.christensen {at}  oceans.ubc.ca
  • Office phone +1 (604) 822 5751
  • Institute for the Oceans and Fisheries, The University of British Columbia, 2202 Main Mall, Vancouver BC, Canada V6T 1Z4

Teaching:

  • I teach the (3 credit) UBC graduate ecosystem modeling course Fish 501 annually. Next time is for 3 weeks in the summer semester, May 15 – June 2, 2017.
  • I co-teach the (6 credit) graduate course Fish 520
  • I also co-teached (the 3 credit) ENVR 300 in the winter semester 2014/15
  • I regularly teach ecosystem modeling outside UBC, see www.ecopath.org or contact me.
  • I am currently preparing a new course on System Dynamics for ENVR 4xx/Fish 5xx.
  • To arrange courses elsewhere: contact me.

Notable research activities:

  • 2016: Core faculty for CREATE Ocean Leaders
  • 2015: Description of global ocean model published
  • 2014: Published study of global fish biomass trends
  • 2014: Published new habitat capacity model, since used for numerous studies
  • 2014: Published study that estimates the Peruvian fisheries sector contribution to GDP
  • 2012: First iteration of the the first food web model of life in the global ocean presented at AAAS. Read about this in ScienceLive and listen to Science podcast. Includes estimates of global fish biomass and the first appearance of the Oracle
  • 2011: A study presented at AAAS 2011 found that the world’s predatory fish have declined by 2/3 over the last hundred years while prey fish have more than doubled. Listen to Science podcast.  A previous, related study was referenced in an editorial in The New York Times
  • 2009: Co-author of study describing the contribution of fish to the marine inorganic carbon cycle (Science 2009) providing a first estimate of global fish biomass
  • 2008-: Integration of ecological and value modeling: value chain approach integration in EwE
  • 2006- Leading development of new EwE6, including coupling to 3D-gaming engine for visualization, design of decision-support system, single-player game, and videos (Chesapeake)
  • 2004- Developing methodology for database-driven ecosystem model generation; applied to all the world’s large marine ecosystems (Christensen et al. 2008, 2009)
  • 2001-3: Developed methodology for quantification of how fish biomass and exploitation pressure has changed regionally; applied to the North Atlantic, West Africa, and the South China Sea (Christensen et al., 2003, 2004, 2003)
  • 1998: Co-author of “fishing down marine food webs” (Pauly et al. 1998)
  • 1996: First published description of “fishing down the food web” concept (Christensen 1996)
  • 1995: Co-author of “primary production required to sustain global fisheries” (Pauly & Christensen 1995)
  • 1994: First quantification of ecosystem maturity (Christensen 1994), since then applied and elaborated further by many researchers
  • 1993: Published description of how to calculate ‘primary production required for fisheries’ (Christensen & Pauly 1993)
  • 1992: Published description of Ecopath II (Christensen & Pauly 1992). This paper was recognized by Ecological Modelling in Dec 2008 as the third-most cited paper in the journal’s history (out of 5020)
  • 1991: Evaluation of fisheries potential for tropical and subtropical areas globally (Christensen et al. 1991)
  • 1990: Project leader for Ecopath development since 1990

Publications:

Graduate student activities:

  • May soon have an opening for a PhD student, but currently on hold.
  • Other openings are possible, but require funding availability.

Post-Doctoral fellowship:

  • A post-doc position for spatial ecosystem modeling is open for September 1, 2017. See notice.

Thesis/fellowship topics related to ecosystem modeling and management are of interest, but contingent on funding.