Doug Braun

PhD student – graduated 2013

Degrees: BSc Biology (SFU)


My PhD explored how biological and environmental processes govern animal population dynamics and how this information can be used to inform management and conservation. Specifically, my research aimed to discover how life history, habitat and climate interact to affect productivity and the strength of density-dependence of populations. I study sockeye salmon populations throughout the Fraser Basin, British Columbia, which inhabit physically diverse freshwater environments and have evolved extraordinary diversity in life histories. Some of these populations have experienced dramatic declines in abundance in recent years, the reasons for which are not well understood. By identifying the processes that drive productivity and density dependence we can better understand how to conserve salmon populations in the face of climate change, habitat alteration and exploitation.

Braun, D.C. & Reynolds, J.D. (2012).  Cost-effective variable selection in habitat surveys.  Methods in Ecology & Evolution 3, 388-396. pdf

Connors, B.M., Braun, D.C., Peterman, R.M., Cooper, A.B., Reynolds, J.D., Dill, L.M., Ruggerone, G.T. & Krkosek, M. (2012). Migration links ocean-scale competition and local ocean conditions with exposure to farmed salmon to shape wild salmon dynamics.  Conservation Letters 2012, 1-9. pdf

Braun, D.C. & Reynolds, J.D. (2011).  Relationships between habitat characteristics and breeding population densities in sockeye salmon (Oncorhynchus nerka).  Canadian Journal of Fisheries and Aquatic Sciences 68, 758-767. pdf

Verspoor, J.J., Braun, D.C. & Reynolds, J.D.  (2010).  Quantitative links between Pacific salmon and stream periphyton.  Ecosystems 13, 1020-1034. DOI: 10.1007/s10021-010-9371-0.  pdf

Verspoor, J.J., Braun, D.C., Stubbs, M.M., & Reynolds, J.D. (2011). Persistent ecological effects of a salmon-derived nutrient pulse on stream invertebrate communities.  Ecosphere 2, 1-17. pdf