Norris, Ryan - University of Guelph - Department of Integrative Biology

个人简介

I'm an ecologist interested in behaviour, conservation, and evolution of migratory animals. Our lab addresses a variety of topics including effects of climate change and habitat loss throughout the annual cycle in seabirds and songbirds, the role of migration networks and seasonal interactions in predicting changes in population size, the development of optimal conservation plans for a range of migratory species, the costs and benefits of migration, and life-history trade-offs between different periods of the annual cycle. My research integrates behavioural and demographic field research with landscape ecology, theoretical and empirical modeling, and biogeochemistry. Our lab conducts field research in a number of locations including Algonquin Park, the BC Pacific coast, Costa Rica, the Bay of Fundy, and right here on the University of Guelph campus. Education B.E.S. - University of Waterloo (1998) M.Sc. - York University (2000) Ph.D. - Queen's University (2004) NSERC/Killam Postdoc, University of British Columbia (2006)

研究领域

Migration represents one of the most complex and fascinating behaviours in nature. Found in a wide variety of taxa including insects, fish, reptiles, mammals, and birds, migration can span thousands of kilometres and occur over multiple life-history stages and habitats. Identifying the factors that influence individual success and population abundance requires knowledge of how events are linked throughout the migratory cycle. The primary obstacle, thus far, has been the inability to track individuals over large geographic distances, resulting in research that has been limited to isolated stages of the migratory cycle. This has made it challenging to determine how populations are spatially connected between periods and for understanding how events in one season carry-over to influence success in subsequent seasons. Novel technologies, such as stable isotopes, trace elements and radio-telemetry are beginning to bridge these gaps by providing the ability to integrate life-history and demographic information throughout the migratory cycle. The long term goals of my research are: (1) understand how events within and between seasons interact with behaviour and habitat quality to influence population abundance and life-histories, and (2) parameterize and develop a set of predictive models that can be used to test aspects of life-history evolution and population dynamics in migratory animals, (3) develop and refine sets of accurate and non-invasive methods to track individuals over large geographic distances, and finally (4) apply year-round populations models to construct optimal conservation plans that can be used for a variety of species worldwide.

近期论文

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Elliott, KH, Betini, GS & Norris, DR. 2016. Fear and carry-over effects: predator presence during the non-breeding period influences condition and subsequent reproductive output. Journal of Animal Ecology 85: 507-515. Derbyshire, R, Strickland, D & Norris, DR. 2015. Experimental evidence and 43 years of monitoring data support the food limitation hypothesis in a boreal food-caching songbird. Ecology 96: 3005-3015. Betini, GS, Fitzpatrick, MJ & Norris, DR. 2015. Experimental evidence for the effect of habitat loss on the dynamics of migratory networks. Ecology Letters 18: 526-534. DeLuca, WV, Woodworth, BK, Rimmer, C, Taylor, PD, Marra, PP, McFarland, K, Bearhop, S, Mackenzie, SA & Norris, DR. 2015. Transoceanic migration by a 12g songbird. Biology Letters 11: 20141045. Flockhart, DTT, Pichancourt, JB, Norris, DR & Martin TG. 2015. Unravelling the annual cycle in a migratory animal: breeding-season habitat loss drives declines of monarch butterflies. Journal of Animal Ecology 84: 155-165. Betini, GS, Prodan, L, Griswold, CK & Norris, DR. 2014. Body size, carry-over effects, and survival in a seasonal environment: population consequences. Journal of Animal Ecology 83: 1313-1321. Flockhart, D.T.T., L.I. Wassenaar, K.A. Hobson, T.G. Martin, M.B. Wunder, and D.R. Norris. 2013. Tracking multi-generational colonization of the breeding grounds by monarch butterflies in eastern North America. Proceedings of the Royal Society, London: Biological Sciences 280 (1768): 20131087 Betini, G.S., C.G. Griswold, and D.R. Norris. 2013. Density-mediated carry-over effects explain variation in breeding output across time in a seasonal population. Biology Letters 9(5): 20130582. Mouritsen, H., R. Derbyshire, J. Stakkeicken, B. Frost, O. Mouritsen, and D.R. Norris. 2013. An experimental displacement and over 50 years of tag-recoveries show that monarch butterflies are not true navigators. Proceedings of the National Academy of Sciences, USA 110(18): 7348-7353. Betini, G.S., C.G. Griswold, and D.R. Norris. 2013. Carry-over effects, sequential density dependence and the dynamics of populations in a seasonal environment. Proceedings of the Royal Society, London: Biological Sciences 280: 20130110.