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Carsten Rahbek, PhD Patterns of Diversity Yesterday, Today, and Tomorrow

Carsten Rahbek, PhD Patterns of Diversity Yesterday, Today, and Tomorrow. scholar.google.com. Ryan Burner Community Ecology 23 April 2013. Education University of Copenhagen, Denmark, Biology, B.Sc., 1988 University of Wisconsin, USA, visiting graduate student, 1990 - 1991

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Carsten Rahbek, PhD Patterns of Diversity Yesterday, Today, and Tomorrow

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  1. Carsten Rahbek, PhDPatterns of DiversityYesterday, Today, and Tomorrow scholar.google.com Ryan Burner Community Ecology 23 April 2013

  2. Education University of Copenhagen, Denmark, Biology, B.Sc., 1988 University of Wisconsin, USA, visiting graduate student, 1990 - 1991 University of Copenhagen, Denmark, Zoology, M.Sc., 1992 Smithsonian Institution, NMNH, Research Fellow 1993 - 1995 University of Copenhagen, Denmark, Biogeography, PhD, 1995

  3. Appointments Currently: Professor and Director, Center for Macroecology, Evolution and Climate at University of Copenhagen and President-Elect, International Biogeography Society 2005-present. Full Professor, Department of Biology, Univ. of Copenhagen, Denmark; 2001-2005. Professor MSO, Zoological Museum, Univ. of Copenhagen, Denmark; 1995-2005. Head of the Copenhagen Bird Ringing Centre & Curator of Birds; 1998-2001. Associate Professor, Zoological Museum, Univ. of Copenhagen, Denmark; 1995-1998. Assistant Professor, Zoological Museum, Univ. of Copenhagen, Denmark. http://blog.ujjvalpanchal.com/

  4. Research Interests • Patterns of species distribution, species range sizes, species assemblages, species richness and • Mechanisms that determine these patterns • “contemporary and historical factors or perhaps also just a bit of chance” “Center for Macroecology, Evolution and Climate” Shahid Naeem; http://macroecology.ku.dk/

  5. Early Work • A survey of the montane forest avifauna of the Loja province, southern Ecuador; 1991. H. Bloch, M. K. Poulsen, C. Rahbek, J. F. Rasmussen • Lista de aves del Parque Nacional Podocarpus 1992. J. F. Rasmussen, M. K. Poulsen, C. Rahbek, H. Bloch • Avian body weights from southern Equador 1993. C. Rahbek, H. Bloch, M. K. Poulsen, J. F. Rasmussen Orange-headed Tanager wikipedia.com

  6. Species Richness, Gradients, Patterns, and Mechanisms • The elevational gradient of species richness: a uniform pattern? 1995. C. Rahbek • 493 citations, beginning of a major theme in his work • The relationship among area, elevation, and regional species richness in neotropical birds 1997. C. Rahbek biogeography.org

  7. Species Richness, Gradients, Patterns, and Mechanisms • The functional biogeography of species: biogeographical species roles of birds in Wallacea and the West Indies 2013. D. W. Carstensen, B. Dalsgaard, J. C. Svenning, C. Rahbek, J. Fjeldså, W. J. Sutherland, J. M. Olesen • The role of mountain ranges in the diversification of birds 2012. J. Fjeldså, R. C. K. Bowie, C. Rahbek • Dispersion fields, diversity fields and null models: uniting range sizes and species richness 2010. M. K. Borregaard, C. Rahbek • Predicting continental-scale patterns of bird species richness with spatially explicit models 2007. C. Rahbek, N. J. Gotelli, R. K. Colwell, G. L. Entsminger, T. Rangel, G. R. Graves • s J. Fjeldså N. Sanders w/ CR G. Graves R. Colwell N. Gotelli

  8. Conservation and Biogeography • Species richness and endemism in South American birds: implications for the design of networks of nature reserves 1997. J. Fjeldså, C. Rahbek • Continent-wide conservation priorities and diversification processes 1998. J. Fjeldså, C. Rahbek • Priorities for conservation in Bolivia, illustrated by a continent-wide analysis of bird distributions 1998. J. Fjeldså, C. Rahbek • Conserving biodiversity in a world of conflicts 2007. M. B. Araújo, C Rahbek x Holt et al. 2012

  9. Redrawing Wallace’s Eco-regionsby Taxa,using Phylogenetic Relationships Holt et al. (2012)

  10. Recent Focus • On “the effect of climate change, the role of scale and conceptual formulation, and practical design of null- and predictive models that allow direct testing of hypotheses related to patterns of diversity” • Views his theoretical work as informing conservation priority setting and hypothesis testing

  11. Effects of Climate Change on Species Diversity • Habitat stability affects dispersal and the ability to track climate change 2012. C. Hof, M. Brändle, D. M. Dehling, M. Munguía, R. Brandl, M. B. Araújo, C. Rahbek • Using species co‐occurrence networks to assess the impacts of climate change 2011. M. B. Araújo, A. Rozenfeld, C. Rahbek, P. A. Marquet • Additive threats from pathogens, climate and land-use change for global amphibian diversity 2011. C. Hof, M. B. Araújo, W. Jetz, C. Rahbek

  12. Habitat Stability, Dispersal, and the ability to trackClimate Change Hof et al. 2012

  13. Elevational Gradients in Species Diversity • A major recurring theme in Carsten Rahbek’s research, and my focus for the rest of this presentation

  14. Gradients in Species Diversity • The patterns and causes of elevational diversity gradients 2012. N. J. Sanders, C. Rahbek • Contrasting patterns of phylogenetic assemblage structure along the elevational gradient for major hummingbird clades 2011. J. L. Parra, C. Rahbek, J. A. McGuire, C. H. Graham • Elevational zonation of afrotropical forest bird communities along a homogeneous forest gradient 2009. T. S. Romdal, C. Rahbek • Scale effects and human impact on the elevational species richness gradients 2008. D. Nogués-Bravo, M. B. Araújo, T. Romdal, C. Rahbek • The Mid‐Domain Effect: There’s a Baby in the Bathwater 2005. R. K. Colwell, C Rahbek, NJ Gotelli • The Mid‐Domain Effect and Species Richness Patterns: What Have We Learned So Far? 2004 R. K. Colwell, C. Rahbek, N. J. Gotelli

  15. Latitudinal Gradients in Species Diversity • One of the ‘most universal biogeographic patterns’ Marine Fish Species by Latitude Pacific Atlantic From Rohde (1978) and Rohde (1993), combined in Rohde (2011)

  16. Latitudinal and Elevational Gradients Similarities -Generally declining diversity -Generally declining temperatures -Generally declining vegetation cover and primary productivity Differences -Seasonality -Location of humidity peak -Scale -Replication

  17. What Pattern? A First Question From Rahbek (1995) From Rahbek (1995)

  18. The Richness/Elevation RelationshipLocally Raw Data Standardized From Rahbek (1995), citing Terborgh (1977)

  19. The Richness/Elevation RelationshipContinent Wide Raw Data Standardized From Rahbek (1995)

  20. Simple Models of Observed Distributions Rahbek (1997)

  21. Models predicting a monotonic decline Monotonic Richness/ Productivity Rapoport’s ‘Rule’ Rahbek (1997)

  22. Models predicting a hump-shaped distribution Hump-shaped Species/ Productivity relationship Rahbek (1997)

  23. Models predicting a hump-shaped distribution Bounded Random Geographical Ranges Rahbek (1997)

  24. Simple Models of Observed Distributions Rahbek (1997)

  25. Sampling Effects: multiple draws from the same data set Range of Elevational Gradient (m) Spatial Grain Size (km^2) Rahbek (2008)

  26. Sampling Effects: multiple draws fro the same data set Range of Elevational Gradient (m) Spatial Grain Size (km^2) Rahbek (2008)

  27. Sampling Effects: multiple draws from the same data set Range of Elevational Gradient (m) 1 25 81 Rahbek (2008) Spatial Grain Size (km^2)

  28. Worldwide Average Human Impact by Elevation Human Impact Index Percent Original Vegetation Rahbek (2008)

  29. Proposed Mechanisms • Some of the most frequently tested: • climate and productivity • source-sink dynamics • mass and area effects • disturbance • geometric factors • evolutionary history • competition N. J. Sanders and C. Rahbek (2012)

  30. Thanks science.ku.dk

  31. For Future Reference Colwell, R. K., et al. (2004). "The Mid‐Domain Effect and Species Richness Patterns: What Have We Learned So Far?" The American Naturalist163(3): E1-E23. Colwell, R. K., et al. (2005). "The Mid‐Domain Effect: There’s a Baby in the Bathwater." The American Naturalist166(5): E149-E154. Hof, C., et al. (2012). "Habitat stability affects dispersal and the ability to track climate change." Biology letters8(4): 639-643. Holt, B. G., et al. (2013). "An Update of Wallace’s Zoogeographic Regions of the World." Science339(6115): 74-78. Nogués-Bravo, D., et al. (2008). "Scale effects and human impact on the elevational species richness gradients." Nature453(7192): 216-219. Rahbek, C. (1995). "The elevational gradient of species richness: a uniform pattern?" Ecography18(2): 200-205. Rahbek, C. (1997). "The relationship among area, elevation, and regional species richness in neotropical birds." The American Naturalist149(5): 875-902. Rohde, Klaus (2011). Latitudinal Gradients in Species Diversity: Why are there so many species in the tropics? [Internet]. Version 1. Clinical Sciences. Available from: http://clinicalsciences.wordpress.com/article/latitudinal-gradients-in-species-xk923bc3gp4-56/. Sanders, N. J. and C. Rahbek (2012). "The patterns and causes of elevational diversity gradients." Ecography35(1): 1-3.

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