Brendan Hodkinson (Graduate Student)
PhD, Graduated: May 2011
I study fundamental principles of ecology and evolution using the unique symbiotic structures known as lichens.
Lichen Biodiversity: In order to better understand the ecological and evolutionary processes involved in diversification, I study lichen-forming fungi using molecular phylogenetics in concert with traditional analytical methods. This work has led to the description or redefinition of numerous taxa and has provided insight into how organisms interact with one another and their surroundings through time. I am continuing to develop bioinformatic tools to manage and manipulate large data sets for ecological and evolutionary inference. Since much remains to be discovered about the overall diversity of lichenized fungi, systematic regional inventories are still crucial for the advancement of the field. To address this need, I routinely organize and/or contribute to lichen inventories, including several projects that are ongoing in eastern North America.
The Lichen as a Microcosm: I am also conducting pioneering research on the consortia of non-photobiont bacteria that are associated with lichens. There is an ever-increasing body of evidence suggesting that lichens exist not simply as dual partnerships of fungi and algae, but as microcosms comprised of diverse assemblages of specific microbial lineages. Through my research I have detected an undescribed lineage of bacteria (‘LAR1’) that has been found almost exclusively in association with lichens. My more recent projects involve high-throughput pyrosequencing to examine these communities in terms of both ecology and physiology. As part of this work I am continuing to develop tools (e.g., primers, protocols, programs, and scripts) that can be widely applied to the study of ecology and evolution.
Hodkinson, B. P., N. R. Gottel, C. W. Schadt, and F. Lutzoni. In press. Photoautotrophic symbiont and geography are major factors affecting highly structured and diverse bacterial communities in the lichen microbiome. Environmental Microbiology.
Hodkinson, B. P., and J. C. Lendemer. 2011. Molecular analyses reveal semi-cryptic species inXanthoparmelia tasmanica. Bibliotheca Lichenologica 106: 115-126.
Hodkinson, B. P., and J. C. Lendemer. 2011a. Punctelia eganii, a new species in the P. rudecta group with a novel secondary compound for the genus. Opuscula Philolichenum 9: 35-38.
Lücking, R., B. P. Hodkinson, A. Stamatakis, and R. A. Cartwright. 2011. PICS-Ord: Unlimited Coding of Ambiguous Regions by Pairwise Identity and Cost Scores Ordination. BMC Bioinformatics 12: 10.
Lücking, R., F. Seavey, R. Common, S. Q. Beeching, O. Breuss, W. R. Buck, L. Crane, M. Hodges, B. P.Hodkinson, E. Lay, J. C. Lendemer, R. T. McMullin, J. A. Mercado-Díaz, M. P. Nelsen, E. Rivas Plata, W. Safranek, W. B. Sanders, H. P. Schaefer Jr., and J. Seavey. 2011. The lichens of Fakahatchee Strand Preserve State Park, Florida: Proceedings from the 18th Tuckerman Workshop. Bulletin of the Florida Museum of Natural History 49(4): 127-186.
Schmull, M., J. Miadlikowska, M. Pelzer, E. Stocker-Wörgötter, V. Hofstetter, E. Fraker, B. P. Hodkinson, V. Reeb, M. Kukwa, H. T. Lumbsch, F. Kauff, and F. Lutzoni. 2011. Phylogenetic affiliations of members of the heterogeneous lichen-forming genus Lecidea sensu Zahlbruckner (Lecanoromycetes, Ascomycota). Mycologia 103: 10.3852/10-234.
Hodkinson, B. P. 2010. A First Assessment of Lichen Diversity for One of North America’s ‘Biodiversity Hotspots’ in the Southern Appalachians of Virginia. Castanea 75(1): 126-133.
Hodkinson, B. P. 2010a. Lichenological Diversity. The Bryologist 113(4): 828-829.
Hodkinson, B. P., J. C. Lendemer, and T. L. Esslinger. 2010. Parmelia barrenoae, a macrolichen new to North America and Africa. North American Fungi 5(3): 1-5.
Lendemer, J. C., and B. P. Hodkinson. 2010. A new perspective on Punctelia subrudecta in North America: previously-rejected morphological characters corroborate molecular phylogenetic evidence and provide insight into an old problem. The Lichenologist 42(4): 405-421.
Hodkinson, B. P., and F. Lutzoni. 2009. A microbiotic survey of lichen-associated bacteria reveals a new lineage from the Rhizobiales. Symbiosis 49(3): 163-180.
Lendemer, J. C., and B. P. Hodkinson. 2009. The Wisdom of Fools: new molecular and morphological insights into the North American apodetiate species of Cladonia. Opuscula Philolichenum 7: 79-100.
Lendemer, J. C., and B. P. Hodkinson. 2009a. Stretching the boundaries: A range extension for Buellia wheeleri R.C. Harris. Evansia 26(4): 172-176.
Schoch, C. L., G.-H. Sung, F. López-Giráldez, J. P. Townsend, J. Miadlikowska, V. Hofstetter, B. Robbertse, P. B. Matheny, F. Kauff, Z. Wang, C. Gueidan, R. M. Andrie, K. Trippe, L. M. Ciufetti, A. Wynns, E. Fraker, B. P. Hodkinson, G. Bonito, R. Yahr, J. Z. Groenewald, M. Arzanlou, G. S. de Hoog, P. W. Crous, D. Hewitt, D. H. Pfister, K. Peterson, M. Gryzenhout, M. J. Wingfield, A. Aptroot, S.-O. Suh, M. Blackwell, D. M. Hillis, G. W. Griffith, L. A. Castlebury, A. Y. Rossman, H. T. Lumbsch, R. Lücking, B. Büdel, A. Rauhut, P. Diederich, D. Ertz, D. M. Geiser, K. Hosaka, P. Inderbitzin, J. Kohlmeyer, B. Volkmann-Kohlmeyer, L. Mostert, K. O’Donnell, H. Sipman, J. D. Rogers, R. A. Shoemaker, J. Sugiyama, R. C. Summerbell, W. Untereiner, P. Johnston, S. Stenroos, A. Zuccaro, P. Dyer, P. Crittenden, M. S. Cole, K. Hansen, J. M. Trappe, F. Lutzoni, and J. W. Spatafora. 2009. The Ascomycota Tree of Life: A Phylum Wide Phylogeny Clarifies the Origin and Evolution of Fundamental Reproductive and Ecological Traits. Systematic Biology 58(2): 224-239.
2008 & earlier
McCormick, M. K., D. F. Whigham, D. Sloan, K. O’Malley, and B. Hodkinson. 2006. Orchid-fungus fidelity: a marriage meant to last? Ecology 87(4): 903-911.
Miadlikowska, J., F. Kauff, V. Hofstetter, E. Fraker, M. Grube, J. Hafellner, V. Reeb, B. P. Hodkinson, M. Kukwa, R. Lücking, G. Hestmark, M. Garcia Otalora, A. Rauhut, B. Büdel, C. Scheidegger, E. Timdal, S. Stenroos, I. Brodo, G. Perlmutter, D. Ertz, P. Diederich, J. C. Lendemer, P. May, C. L. Schoch, A. E. Arnold, C. Gueidan, E. Tripp, R. Yahr, C. Robertson, and F. Lutzoni. 2006. New insights into classification and evolution of the Lecanoromycetes (Pezizomycotina, Ascomycota) from phylogenetic analyses of three ribosomal RNA- and two protein-coding genes. Mycologia 98(6): 1088-1103.
Swaddle, J. P., M. G. Cathey, M. Correll, and B. P. Hodkinson. 2005. Socially transmitted mate preferences in a monogamous bird: a non-genetic mechanism of sexual selection. Proceedings of the Royal Society of London B: Biological Sciences 272(1567): 1053-1058.
Selected Additional Works
Hodkinson, B. P. 2011. Molecular Phylogenetics Workshop. American Bryological and Lichenological Society Meeting.
Hodkinson, B. P., N. R. Gottel, C. W. Schadt, and F. Lutzoni. 2011. The Lichen Microbiome: Greater ecological complexity revealed by pyrosequencing. American Bryological and Lichenological Society Meeting.
Hodkinson, B. P., and J. C. Lendemer. 2011. Lichens of the Dismal Swamp: A case study on the role of floristics in advancing the fields of systematics, ecology, and biogeography. American Bryological and Lichenological Society Meeting.
Cartwright, R., B.[P.]Hodkinson, A. Stamatakis, and R. Lücking. 2010. Extracting Phylogenetic Information from Ambiguous Regions through Multidemensional Scaling of Pairwise Likelihoods. In:Evolution 2010: Conference Program. Portland State University, Portland, Oregon, pg. 132 (abs. 901).
Hodkinson, B. P., and F. Lutzoni. 2010. Do lichens harbor their own rhizobia? A large-scale phylogenetic survey of lichen-associated bacteria from the order Rhizobiales. Inoculum 61(4): 55-56.
Hodkinson, B. P., and J. C. Lendemer. 2010. How do you solve a problem like Xanthoparmelia? Molecular analyses reveal semi-cryptic species in an Australasian-American ‘disjunct’ taxon. In: Botany 2010. Botanical Society of America, St. Louis, Missouri, abs. 355.
Lendemer, J. C., R. C. Harris, and B. P. Hodkinson. 2010. Connecting the dots: progress and problems in assessing lichen biodiversity and biogeography in the coastal plain of southeastern North America. In:Botany 2010. Botanical Society of America, St. Louis, Missouri, abs. 30.
Lendemer, J. C., B. P. Hodkinson, and M. Piercey-Normore. 2010. Cladonia Systematics: What can we infer from morphology and molecules? In: Botany 2010. Botanical Society of America, St. Louis, Missouri, abs. 1052.
Hodkinson, B. P., and F. Lutzoni. 2009. Secret alliances: Patterns of association between lichens and non-photobiont bacteria. In: Botany and Mycology 2009: Abstract Book. Botanical Society of America, Granville, Ohio, pg. 249.
Hodkinson, B. P., and F. Lutzoni. 2008. Lichen-associated non-photobiont bacteria: the third symbiont?Inoculum 59(4): 34. [Student Presentation Award: best student conference paper]
Hodkinson, B. P., T. M. Loveless, P. E. Bishop, and F. Lutzoni. 2008. Nitrogen-fixing non-photobiont bacteria and lichens: an alternative lifestyle? In: The 6th IAL Symposium and Annual ABLS Meeting: Lichenological Abstracts. T. H. Nash III and M. R. D. Seaward (eds.). American Bryological and Lichenological Society and the International Association for Lichenology, Tempe, AZ, pg. 30.
Hodkinson, B. P., and F. Lutzoni. 2007. Non-photosynthetic bacteria and the lichen symbiosis. In: ABLS Meeting, 2007, Xalapa, México: Abstracts. E. De Luna (ed.). INECOL, Xalapa, México, abs. O10. [A. J. Sharp Award: best student conference paper]
Hodkinson, B. P., and M. A. Case. 2007. Lichen ecology in coastal ravines. In: ABLS Meeting, 2007, Xalapa, México: Abstracts. E. De Luna (ed.). INECOL, Xalapa, México, abs. P03.
Hodkinson, B. P., F. M. Lutzoni, T. M. Loveless, and P. E. Bishop. 2006. Non-photosynthetic bacteria and the lichen symbiosis. In: 5th International Symbiosis Society Congress: Program, Abstracts, Participants. M. Bright, M. Horn, D. Zook, S. Lücker, and I. Kolar (eds.). Promare, Gdynia, Poland, pg. 95.
“Little progress can be made if new techniques are used only
“Your observations are important to others” (Fortune Cookie, 2009).