Jason Walker
IGERT in Urban Ecology Fellow, School of Life Sciences/Plant Biology
School of Life Sciences/Plant Biology
Arizona State University
PO Box 874501
Tempe, AZ 85287-4501
USA
Titles
- IGERT in Urban Ecology Fellow, School of Life Sciences/Plant Biology
Journal Articles
2011
Majumdar, A., C. Gries and J. S. Walker. 2011. A non-stationary spatial generalized linear mixed model approach for studying plant diversity. Journal of Applied Statistics 38(9):1935-1950. DOI: 10.1080/02664763.2010.537650. (link )
2010
Walker, J. S. and E. Shochat. 2010. Scalar effects of vegetation on bird communities in an urbanizing desert ecosystem. Urban Ecosystems 13:155-167. DOI: 10.1007/s11252-009-0112-0. (link )
2009
Walker, J. S., N. B. Grimm, J. M. Briggs, C. Gries and L. Dugan. 2009. Effects of urbanization on plant species diversity in central Arizona. Frontiers in Ecology and the Environment 7(9):465-470. DOI: 10.1890/080084. (link )
2008
Walker, J. S., R. C. Balling, J. M. Briggs, M. V. Katti, P. S. Warren and E. A. Wentz. 2008. Birds of a feather: Interpolating distribution patterns of urban birds. Computers, Environment and Urban Systems 32(1):19-28. DOI: 10.1016/j.compenvurbsys.2007.02.001. (link )
Walker, J. S. and T. Blaschke. 2008. Object-based land-cover classification for the Phoenix metropolitan area: Optimization versus transportability. International Journal of Remote Sensing 29(7):2021-2040. DOI: 10.1080/01431160701408337. (link )
2007
Baker, L. A., L. B. Byrne, A. Felson and J. S. Walker. 2007. Effects of human choices on characteristics of urban ecosystems. Bulletin for the Ecological Society of America 88(4):404-409. DOI: 10.1890/0012-9623(2007)88[404:SEOHCO]2.0.CO;2.
Walker, J. S. and J. M. Briggs. 2007. An object-oriented approach to urban forest mapping with high-resolution, true-color aerial photography. Photogrammetric Engineering and Remote Sensing 73(5):577-583. (link )
2006
Warren, P. S., C. Tripler, D. Bolger, S. H. Faeth, N. Huntly, C. A. Lepczyk, J. L. Meyer, C. Parker, E. Shochat and J. S. Walker. 2006. Urban food webs: Predators, prey, and the people who feed them. Bulletin of the Ecological Society of America 87(4):387-393. DOI: 10.1890/0012-9623(2006)87[387:UFWPPA]2.0.CO;2. (link )
Posters
2007
Majumdar, A., C. Gries, J. S. Walker and N. B. Grimm. 2007. A nonstationary spatial generalized linear mixed model approach for studying plant diversity. Poster presented at the January 10, 2007 CAP LTER Ninth Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ.. (link )
Schwartzmann, E. and J. S. Walker. 2007. Differing avian connections to a semi-arid ecosystem. San Jose McEnery Conference Center. Poster presented at the August 6-10, 2007 Ecological Restoration in a Changing World at the 92nd Annual Meeting of the Ecological Society of America held with the Society for Ecological Restoration 18th International Conference, San Jose, CA.
Schwartzmann, E. and J. S. Walker. 2007. The shadowing of avian diversity. Poster presented at the January 10, 2007 CAP LTER Ninth Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ.. (link )
Walker, J. S. 2007. Money grows trees: A socio-ecological path analysis. Poster presented at the January 10, 2007 CAP LTER Ninth Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ.. (link )
2006
Bang, C., R. J. Bills, J. M. Briggs, M. A. Diiorio, L. Dugan, R. E. Erickson, S. R. Earl, S. H. Faeth, M. J. Feldner, C. Gries, N. B. Grimm, E. J. Holmes, D. Hope, J. P. Kaye, A. P. Kinzig, C. Kochert, A. Majumdar, C. L. Redman, E. L. Shock, Q. Stewart, J. C. Stutz, M. S. Tseng, J. S. Walker, S. Whitcomb and X. Zhuo. 2006. Survey 200: CAP LTER's approach to extensive field monitoring. Poster presented at the 20-23 September 2006 LTER All Scientist Meeting, YMCA of the Rockies, Estes Park, CO. (link )
Dugan, L., J. S. Walker, C. Gries, M. F. Wojciechowski and L. R. Landrum. 2006. The effects of urbanization on plant species richness in and around a rapidly growing desert city. Poster presented at the 6-11 August 2006 91st Annual Meeting of the Ecological Society of America, Memphis, TN.
Ruddell, D. M., A. Gustafson, J. S. Walker and S. L. Harlan. 2006. Plans for the 2006 Phoenix area social survey. Poster presented at the 19 January 2006 CAP LTER 8th Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ. (link )
Ruddell, D. M., A. Gustafson, J. S. Walker and S. L. Harlan. 2006. The Phoenix area social survey (PASS): New possibilities for LTER cross-disciplinary research in the social and ecological sciences. Poster presented at the September 20-23 LTER All Scientist Meeting, YMCA of the Rockies, Estes Park, CO. (link )
Walker, J. S. and E. Banzhaf. 2006. Urban tree cover of Leipzig, Germany. Poster presented at the 19 January 2006 CAP LTER 8th Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ. (link )
Walker, J. S. and T. Blaschke. 2006. A high-resolution urban landcover classification scheme for Phoenix. Poster presented at the 19 January 2006 CAP LTER 8th Annual Poster Symposium, Global Institute of Sustainability, Arizona State University, Tempe, AZ. (link )
Walker, J. S. and H. Schaafsma. 2006. Biological impacts of human migration to a desert city. Poster presented 8-12 January at the Ecological Society of America meeting, Ecology in an Era of Globalization: Challenges and Opportunities for Environmental Scientists in the Americas, Merida, Yucatan, Mexico.
Walker, J. S. and H. Schaafsma. 2006. Ecological impacts of prehistoric and modern Phoenicians. Poster presented February at the Annual Meeting of the Graduates in Earth, Life and Social Sciences Research Symposium, Arizona State University, Tempe, AZ.
2005
Walker, J. S. 2005. Birds of a feather: A story of urban and exurban avian population biology. Poster presented at the 19 January 2005 CAP LTER Seventh Annual Poster Symposium, International Institute of Sustainability, Arizona State University, Tempe, AZ. (link )
Walker, J. S. 2005. Socio-economics drive urban forest structure. Poster presented 11 February 2005, Graduates in Earth, Life, and Social Sciences Symposium, Arizona State University, Tempe, AZ.
2004
Walker, J. S. and J. M. Briggs. 2004. Hierarchical image analysis of Phoenix. Poster presented 20 February 2004, Graduates in Earth, Life, and Social Sciences Symposium, Arizona State University, Tempe, AZ.
Walker, J. S. and J. M. Briggs. 2004. Hierarchical image analysis of Phoenix's urban forest structure. Poster presented at July 30-August 7, 2004, 89th Annual Meeting of the Ecological Society of America, Portland, OR. (link )
Walker, J. S. and J. M. Briggs. 2004. Remote sensing of Phoenix's urban forest with high-resolution aerial photography. Poster presented at the 23 February 2004 Sixth Annual CAP LTER Poster Symposium, Center for Environmental Studies, Arizona State University. Tempe, AZ.
2003
Walker, J. S., J. M. Briggs and C. Gries. 2003. Socio-economic influences on urban forest structure in Phoenix. Poster presented September 2004 at the annual LTER All Scientists Meeting, Seattle, WA.
Presentations
2007
Walker, J. S. and J. M. Briggs. 2007. Money grows trees: a socio-ecological path analysis. Presentation at the August 6-10, 2007 Ecological Restoration in a Changing World at the 92nd Annual Meeting of the Ecological Society of America held in conjunction with the Society for Ecological Restoration 18th International Conference, San Jose, CA.
2006
Walker, J. S. 2006. Ecological transformation via urbanization. Presentation at September 18 CAP LTER All Scientist Meeting, Graduate Student Summer Research Presentations, Global Institute of Sustainability, Arizona State University, Tempe, AZ.
Walker, J. S., L. Dugan, C. Gries and J. M. Briggs. 2006. Urban succession: Phoenix. Presentation at the 6-11 August 2006 symposium, "The Urban Food Web: How Humans Alter the State and Interactions of Trophic Dynamics" at the 91st Annual Meeting of the Ecological Society of America, Memphis, TN.
Walker, J. S. and H. Schaafsma. 2006. Ecological effects of human migration to a desert city. Presentation 8-12 January at the Ecological Society of America meeting, Ecology in an Era of Globalization: Challenges and Opportunities for Environmental Scientists in the Americas, Merida, Mexico.
2005
Walker, J. S. and J. M. Briggs. 2005. An object-oriented classification of an arid urban forest with true-color aerial photography. Presentation14-16 March 2005, 5th International Symposium of Remote Sensing of Urban Areas, Arizona State University, Tempe, AZ.
Walker, J. S. and J. M. Briggs. 2005. Successional dynamics of the urban forest in the Phoenix metropolitan. Presentation 7-12 August 2005 90th Annual Meeting of the Ecological Society of America, Montreal, Canada.
2004
Walker, J. S. 2004. A fine-scaled remote sensing methodology for Phoenix's urban ecosystem. Presentation at CAP LTER's 1st annual Urban Community Ecology Symposium, Tempe, AZ.
Walker, J. S. 2004. Classifying Phoenix's urban forest structure. Presentation at the 21 February 2004, CAP LTER 1st Annual Urban Community Ecology Symposium, Tempe, AZ.
Walker, J. S. 2004. Phoenix's urban forest. Presentation at Berlin-Seattle-Phoenix Urban Ecology Workshop, Seattle, WA.
Conference Papers
2005
Walker, J. S. and J. M. Briggs. 2005. An object-oriented classification of an arid urban forest with true-color aerial photography. Arizona State University, Tempe, AZ. Proceedings of the March 14-16, 2005 ISPRS WG VII/1 Human Settlements and Impact Analysis 3rd International Symposium.
Thesis (PhD)
2008
Walker, J. S. 2008. Human-induced vegetation dynamics and avain responses in a rapidly expanding desert metropolis. PhD dissertation. Arizona State University. (link )