Douglas Thomas Bolger

Academic Appointments

Professor and Chair of Environmental Studies
Adjunct Professor of Biological Sciences

An ecologist and conservation biologist interested in how human land-use affects animal and plant populations, Professor Bolger has research projects that examine the impact of residential development in the coastal sage scrub ecosystem of southern California, and of agricultural intensification in landscapes surrounding national parks in Africa. Professor Bolger is the Director of the Environmental Studies Africa Foreign Studies Program.

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Wild-ID Download

This link, Wild-ID, will begin a download of the Wild-ID software and documentation. Wild-ID is a multi-platform application for pattern extraction and matching for use in photographic mark-recapture studies. It requires Java 1.5 or higher. (Most Mac OSX, Windows, and Linux systems satisfy this requirement. The download is the same for all systems)

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106 Steele
HB 6182
Biological Sciences
Environmental Studies
B.S. Rutgers University
Ph.D. University of California at San Diego

Selected Publications

Morrison, T.A., and D.T. Bolger. 2014. Connectivity and bottlenecks in a migratory wildebeest population. Oryx.

Morrison, T.A., and D.T. Bolger. 2012. Seasonal range fidelity in a tropical migratory ungulate. Journal of Animal Ecology. 81: 543-552.

Bolger, D.T., T.A. Morrison, B. Vance, D. Lee, & H. Farid. 2012. A computer-assisted system for photographic mark–recapture analysis. Methods in Ecology and Evolution. 3:813-822.

Morrison, T.A., J. Yoshizaki, J.D. Nichols, D.T. Bolger. 2011. Estimating survival in photographic capture-recapture studies: overcoming misidentification error. In press, Methods in Ecology and Evolution.

Wolkovich, E.M., D. Lipson, R.A. Virginia, K. Cottingham, and D.T. Bolger. 2009. Grass invasion causes rapid increases in ecosystem carbon and nitrogen storage in a semi-arid shrubland. Global Change Biology. 16: 1351–1365.

Bolger, D.T., W.D. Newmark, T.A. Morrison and D.F. Doak. 2008. The need for integrative approaches to understand and conserve migratory ungulates. Ecology Letters, 11: 63-77.

Bolger, D.T. 2007. Spatial and temporal variation in the Argentine ant edge effect: Implications for the mechanism of edge limitation. Biological Conservation, 136:295-305.

Bolger, D T, M A Patten, and D C Bostock, “Avian Reproductive Failure in Response to an Extreme Climatic Event,” Oecologia 142:3 (January 2005) 398-406.

Lowe W.H., K.H. Nislow, and D.T. Bolger, 2004. Stage-specific and interactive effects of sedimentation and trout on a headwater stream salamander. Ecological Applications 14: 164-172.

Crooks, K., A. Suarez, and D.T. Bolger, 2004. Avian assemblages along a gradient of urbanization in a highly fragmented landscape. Biological Conservation 115: 451-462.

Patten, M.A. and D.T. Bolger. 2003. Variation in Top-down Control of Avian Reproductive Success Across a Fragmentation Gradient. Oikos 101:479-488.

Bolger, D.T. 2002. Fragmentation effects on birds in southern California: Contrast to the top-down paradigm. Studies in Avian Biology 25:141-157.

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Works in progress

Photographic mark-recapture studies of giraffe and wildebeest populations in the Tarangire-Manyara Ecosystem of northern Tanzania.