H. Bradley Shaffer

UCLA La Kretz Center Director and Distinguished Professor

Department of Ecology and Evolutionary Biology, UCLA La Kretz Center for California Conservation Science


(310) 825-3836

La Kretz Hall, Suite 300
Los Angeles, CA 90095-1496

Personal Website

Bio

Education

1982 – PhD – University of Chicago – Evolutionary Biology
1976 – BS – University of California, Berkeley – Zoology

Research Interests

Evolutionary biology, ecology and conservation biology of amphibians and reptiles. Recent research projects include comparative phylogeography of amphibians and reptiles in California and the central U.S., systematics of freshwater turtles and tortoises in Australia, California, and the rest of the globe, and conservation genetics of endangered California amphibians and reptiles. Recently, we have focused a great deal of ecological and genetical work on the California tiger salamander, an endangered species native to central California grassland habitat.

Projects

2017 Call for Research Proposals

The UCLA La Kretz Center for California Conservation Science and the UC Natural Reserve System Stunt Ranch Santa Monica Mountains Reserve are pleased to announce their annual call for student research proposals. We invite undergraduate, graduate and postdoctoral researchers to consider applying for this funding opportunity. Because Stunt Ranch is now administratively a part of...

UCLA Grand Challenges

The UCLA Grand Challenges (GC) is a multi-year initiative that identifies, incentivizes, and finds solutions for the toughest environmental problems addressing our city, and by extension, our world. La Kretz Director Brad Shaffer is a founding member of the GC steering committee, where he works closely with Associate Vice Chancellor and GC leader Mark Gold...

Publications

Turtles of the World: Annotated Checklist and Atlas of Taxonomy, Synonymy, Distribution, and Conservation Status (8th Ed.)

Turtle Taxonomy Working Group [A. G. J. Rhodin,, J. B. Iverson, R. Bour, U. Fritz, A. Georges, H. B. Shaffer, and P. P. van Dijk]

Published Work | 2017 | Chelonian Research Monographs 7: 292 pp.


Efficient screening for ‘genetic pollution’ in an anthropogenic crested newt hybrid zone

B. Wielstra, T. Burke, R.K. Butlin, O. Schaap, H.B. Shaffer, K. Vrieling, and J. W. Arntzen

Published Work | 2016 | Conservation Genetics Resources 8:553-560


Phylogeny and temporal diversification of the New World pond turtles (Emydidae)

P.Q. Spinks, R.C. Thomson, E. McCartney-Melstad, and H. B. Shaffer

Published Work | 2016 | Molecular Phylogenetics and Evolution 103:85-97


Individual fluctuations in toxin levels affect breeding site fidelity in a chemically defended amphibian

GM Bucciarelli, DB Green, HB Shaffer, LB Kats

Published Work | 2016 | Proc. R. Soc. B 283 : 20160468


Do ecological niche models accurately identify climatic determinants of species ranges?

C.A. Searcy and H. B. Shaffer

Published Work | 2016 | American Naturalist 187:423-435


Exon capture optimization in amphibians with large genomes

E. McCartney-Melstad, G. G. Mount, and H. B. Shaffer

Published Work | 2016 | Molecular Ecology Resources 16:1084-1094


Hybridization and endangered species protection in the molecular era

R.K. Wayne and H. B. Shaffer

Published Work | 2016 | Molecular Ecology 25:280-289


Advances in climate models from CMIP3 to CMIP5 do not change predictions of future habitat suitability for California reptiles and amphibians

A. N. Wright, M. W. Schwartz, R. J. Hijmans, and H. Bradley Shaffer

Published Work | 2016 | Climatic Change 134:579-591


Ecological equivalency as a tool for endangered species management

C. A. Searcy, H. B. Rollins and H. B. Shaffer

Published Work | 2016 | Ecological Applications 26:94-103


Amphibian molecular ecology and how it has informed conservation

E. McCartney-Melstad and H. B. Shaffer

Published Work | 2015 | Molecular Ecology 24:5084-5109



Turtles and tortoises of the world during the rise and global spread of humanity: first checklist and review of extinct Pleistocene and Holocene chelonians. In: Rhodin, A.G.J., Pritchard, P.C.H., van Dijk, P.P., Sau- mure, R.A., Buhlmann, K.A., Iverson, J.B., and Mittermeier, R.A. (Eds.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group

Turtle Extinctions Working Group [Rhodin, A.G.J., Thomson, S., Georgalis, G., Karl, H.-V., Danilov, I.G., Takahashi, A., De La Fuente, M.S., Bourque, J.R., Delfino M., Bour, R., Iverson, J.B, Shaffer, H. B., and Van Dijk, P.P.].

Published Work | 2015 | Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs 5(8):000e.1–66



Desert Tortoises in the Genomic Age: Population Genetics and the Landscape

H. B. Shaffer, E. McCartney-Melstad, P. Ralph, G. Bradburd, E. Lundgren, J. Vu, B. Hagerty, F. Sandmeier, C. Weitzman, R. Tracy

Progress Report | 2015


Conservation genetics and genomics of amphibians and reptiles

H. B. Shaffer, M, Gidiş E. McCartney-Melstad, K. M. Neal, H. M. Oyamaguchi, M. Tellez, and E. M. Toffelmier

Published Work | 2015 | Annual Reviews of Animal Biosciences 3:113-138


Determinants of size at metamorphosis in an endangered amphibian and their projected effects on population stability

C.A. Searcy, H. Snass, and H. B. Shaffer

Published Work | 2015 | Oikos 124:724-731.


Multiple sources of uncertainty affect metrics for ranking conservation risk under climate change

A. N. Wright, R. J. Hijmans, M. W. Schwartz, and H. B. Shaffer

Published Work | 2015 | Diversity and Distributions 21:111-122


Cryptic diversity in metropolis: Confirmation of a new leopard frog species (Anura: Ranidae) from New York City and surrounding Atlantic Coast regions

J. A. Feinberg, C. E. Newman, G. J. Watkins-Colwell, M. D. Schlesinger, B. Zarate, B. R. Curry, H. B. Shaffer, and J. Burger.

Published Work | 2014 | PLoS ONE 9(10): e108213.


Field of genes

H. B. Shaffer

Published Work | 2014 | BOOM: The journal of California 4:133-138



Multilocus phylogeny of the New-World mud turtles (Kinosternidae) supports the traditional classification of the group

P. Q. Spinks, R. C. Thomson, M. Gidis, and H. B. Shaffer

Published Work | 2014 | Molecular Phylogenetics and Evolution 76:254-260


Field validation supports novel niche modeling strategies in a cryptic endangered amphibian

C. A. Searcy and H. B. Shaffer

Published Work | 2014 | Ecography 37:983-992


The advantages of going large: genome-wide SNPs clarify the complex population history and systematics of the threatened western pond turtle

P.Q. Spinks, R. C. Thomson, and H. B. Shaffer

Published Work | 2014 | Molecular Ecology 23:2228-2241


Incorporating model complexity and spatial sampling bias into ecological niche models of climate change risks faced by 90 California vertebrate species of concern

D. L. Warren, A. N. Wright, S. N. Seifert, and H. B. Shaffer

Published Work | 2014 | Diversity and Distributions 20:334-343


Delayed life history effects, multilevel selection, and evolutionary trade-offs in the California tiger salamander

C. A. Searcy, L. N. Gray, P. C. Trenham and H. B. Shaffer

Published Work | 2014 | Ecology 95:68-77


Genomics in ecology, evolution and systematics

H. B. Shaffer and M. D. Purugganan

Published Work | 2013 | Annual Review of Ecology, Evolution and Systematics 44:1-4


Effects of tail-clipping on survivorship and growth of larval salamanders

R.L. Polich, C. A. Searcy and H. B. Shaffer

Published Work | 2013 | J. Wildlife Management 77:1420-1425


Misleading phylogenetic inferences based on single-exemplar sampling in the turtle genus Pseudemys

P. Q. Spinks, R, C. Thomson, G. B. Pauly, C. E. Newman, G. Mount and H. B. Shaffer

Published Work | 2013 | Molecular Phylogenetics and Evolution 68:269-281



Short hydroperiod decreases fitness of nonnative salamanders in California

J. R. Johnson, M. E. Ryan, S. J. Micheletti, and H. B. Shaffer

Published Work | 2013 | Animal Conservation 16:556-565


Evolution and Conservation

H. B. Shaffer

Published Work | 2013 | pp. 766-773 in The Princeton Guide to Evolution, J. Losos, Editor In Chief. Princeton University Press


Habitat features determine the basking distribution of introduced red-eared sliders and native western pond turtles

M. R. Lambert, S. N. Nielsen, A. N. Wright, R. C. Thomson, and H. B. Shaffer

Published Work | 2013 | Chelonian Conservation and Biology 12:192-199


Lethal effects of water quality on threatened California salamanders but not on co-occurring hybrid salamanders

M. E. Ryan, J. R. Johnson, B. M. Fitzpatrick, L. J. Lowenstine, A. M. Picco and H. B. Shaffer

Published Work | 2013 | Conservation Biology 27:95-102


Microhabitat use and migration distance of an endangered grassland amphibian

C. A. Searcy, Gabbai-Saldate, E., and H. B Shaffer

Published Work | 2013 | Biological Conservation 158:80-87


Turtles of the world, 2012 update: annotated checklist of taxonomy, synonymy, distribution, and conservation status

Turtle Taxonomy Working Group [P. P. van Dijk, J. B. Iverson, H. B. Shaffer, R. Bour and A. G. J. Rhodin]

Published Work | 2012 | In: Rhodin, A.G.J., Pritchard, P.C.H., van Dijk, P.P., Saumure, R.A., Buhlmann, K.A., Iverson, J.B., and Mittermeier, R.A. (Eds.). Conservation Biology of Freshwater Turtles and Tortoises: A Compilation Project of the IUCN/SSC Tortoise and Freshwater Turtle Specialist Group. Chelonian Research Monographs No. 5, pp. 000.243–000.328


Parallel tagged amplicon sequencing reveals major lineages and phylogenetic structure in the North American tiger salamander (Ambystoma tigrinum) species complex

E. M. O’Neil, R. Schwartz, C. T. Bullock, J. S. Williams, H. B. Shaffer, X. Aguilar-Miguel, G. Parra-Olea, and D. W. Weisrock

Published Work | 2012 | Molecular Ecology 22:111-129