stigall@ohio.edu
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   My research interests lie in the area of evolutionary paleobiology. In particular, I am interested in determining the impact of paleobiogeographic and paleoecological controls of macroevolutionary phenomena, principally speciation and cladogenesis. Several current research projects focus on the interplay between biogeographic changes and faunal dynamics of brachiopod and bivalve species during the Late Devonian and Late Ordovician Richmondian Invasion.

   Papers recently published in PLoS ONE demonstrated that rampant species invasions during the Late Devonian “mass extinction” were one of the primary causes of biodiversity decline during this interval. This article was covered by various internet, radio, and in newspaper outlets. A few of these articles are online here: Science, NSF, MSNBC, Discovery News, Voice of America, Columbus Dispatch.

   A major NSF supported research initiative in my lab at this time is examining the stability of species' niches over evolutionary time using ecological niche modeling methods to examine biogeographic change in articulate brachiopod species preserved in the Late Ordovician rocks around Cincinnati, Ohio. This work combines phylogenetics and GIS methods to examine invasive species phenomenon during key intervals in the history of life. Investigating the role of species invasions in mediating long term ecological and evolutionary processes such as speciation and biodiversity crises in the geologic past provides a framework within which to assess the long term impact of modern invasive species. A second NSF funded initiative focuses on digitizing and georeferencing Cincinnatian museum collections for outreach and research purposes.

   Additional research interests center on development of quantitative methods for paleobiogeography and arthropod paleobiology, phylogeny, and evolutionary history, particularly of crustaceans. Current projects involve the taphonomy, ontogeny, and evolution of conchostraca (clam shrimp) of Jurassic freshwater lakes from Antarctica, Namibia, and similar deposits.

>¤ Stigall, A.L. 2012. Invasive species and evolution. Evolution: Education and Outreach.

>¤ Walls, B.J., and Stigall, A.L. 2012. A field based analysis of the accuracy of niche models applied to the fossil record. Paleontological Contributions.

>¤ Stigall, A.L. 2012. Using ecological niche modeling to evaluate niche stability in deep time. Journal of Biogeography.

>¤ Stigall, A.L. 2012. Speciation collapse and invasive species dynamics during the Late Devonian “Mass Extinction.” GSA Today, 22 (1): 4-9.

>¤ Malizia, R.W., and Stigall, A.L. 2011. Niche stability in Late Ordovician articulated brachiopod species before, during, and after the Richmondian Invasion. Palaeogeography, Palaeoclimatology, Palaeoecology, 311:154-170.

>¤ Stigall, A.L. 2011. Application of niche modeling to analyze biogeographic patterns in Palaeozoic brachiopods: Evaluating niche stability in deep time. Memoirs of the Association of Australasian Palaeontologists. 41:229-255.

>¤ Walls, B.J., and Stigall, A.L. 2011. Analyzing niche stability and biogeography of Late Ordovician brachiopod species using ecological niche modeling. Palaeogeography, Palaeoclimatology, Palaeoecology, 299:15-29.

>¤ Stigall, A.L. 2010. Invasive species and biodiversity crises: Testing the link in the Late Devonian. PLoS ONE, 5(12): e15584. doi:10.1371/journal.pone.0015584.

>¤ Dudei, N.L., and Stigall, A.L. 2010. Using ecological niche modeling to assess biogeographic and niche response of brachiopod species to the Richmondian Invasion (Late Ordovician) in the Cincinnati Arch. Palaeogeography, Palaeoclimatology, Palaeoecology, 296: 28-47.

>¤ Mapes, R.H., Hembree, D.I., Rasor, R.E., Stigall, A.L., Goiran, C., and deForges, B.R. 2010. “Nautilus (Cephalopoda) taphonomy and sedimentology of a subtidal, carbonate dominated, nearshore environment.” Palaios, 25: 656-670.

>¤ Stigall, A.L. 2010. Using GIS to assess the biogeographic impact of species invasions on native brachiopods during the Richmondian Invasion in the Type-Cincinnatian (Late Ordovician, Cincinnati region). Palaeontologia Electronica, 13: 5A, 19 p. http://palaeo-electronica.org/2010_1/207/index.html.

>¤ Stigall, A.L. 2010. Integrating GIS and phylogenetic biogeography to assess species-level biogeographic patterns: A case study of Late Devonian faunal dynamics. In P. Upchurch, A. McGowan, and C. Slater, (eds.), Palaeogeography and Palaeobiogeography: Biodiversity in Space and Time. CRC Press, expected publication June, 2010.

>¤ Maguire, K.C., and Stigall, A.L. 2009. Distribution of fossil horses in the Great Plains during the Miocene and Pliocene: An ecological niche modeling approach. Paleobiology, 35: 587-611.

>¤ Maguire, K.C., and Stigall, A.L. 2008. Paleobiogeography of Miocene Equinae of North America: A phylogenetic biogeographic analysis of the relative roles of climate, vicariance, and dispersal. Palaeogeography, Palaeoclimatology, Palaeoecology, 267: 175-184.

>¤ Stigall, A.L., and Hartman, J.H. 2008. A new spinicaudatan genus (Crustacea: "Conchostraca") from the Late Cretaceous of Madagascar. Palaeontology, 51(5): 1053-1067.

>¤ Hendricks, J.R., Lieberman, B.S., and Stigall, A.L. 2008. Using GIS to study the paleobiogeographic and macroevolutionary patterns in soft-bodied Cambrian arthropods. Palaeogeography, Palaeoclimatology, Palaeoecology, 264:163-175.

>¤ Stigall, A.L., Babcock, L.E., Briggs, D.E.G., and Leslie, S.A. 2008. Taphonomy of lacustrine interbeds in the Kirkpatrick Basalt (Jurassic), Antarctica. Palaios, 23(4): 344-355.

>¤ Stigall, A.L., and Lieberman, B.S. 2006. Quantitative Paleobiogeography: GIS, Phylogenetic Biogeographic Analysis, and Conservation Insights. Journal of Biogeography, 33 (12): 2051-2060.

>¤ Lieberman, B.S., and Stigall Rode, A.L., editors. 2005. Paleobiogeography: Generating New Insights into the Coevolution of the Earth and Its Biota. The Paleontological Society Papers, volume 11, 158 p.

>¤ Rode, A.L., and Lieberman, B.S. 2004. Using GIS to unlock the interactions between biogeography, environment, and evolution in Middle and Late Devonian brachiopods and bivalves. Palaeogeography, Palaeoclimatology, Palaeogeography, 211(3-4): 345-359.

>¤ Brame, H.R., expected 2013. Analyzing niche stability levels among Late Ordovician taxa of the Type Cincinnatian using ecological niche modeling.

>¤ Wright, D.F., expected 2012. The origin and impact of Upper Ordovician invasive brachiopods: a phylogenetic biogeographic approach.

>¤ Malizia, R.M., 2012. Analyzing niche stability in Late Ordovician articulated brachiopods during the Richmondian Invasion.

>¤ Dudei, N.L., 2009. The impact of the Richmondian Invasion on paleobiogeographic distribution of taxa in the Late Ordovician C4 sequence (Richmondian Stage, Cincinnati, Ohio) including a comparison of range reconstruction methods; MS thesis.

>¤ Swisher, R.E., 2009. Paleobiogeographical and evolutionary analysis of Late Ordovician C5 sequence brachiopod species with special reference to rhynchonellid taxa; MS thesis.

>¤ Walls, B.J., 2009. Quantitative paleobiogeography of Maysvillian (Late Ordovician) brachiopod species on the Cincinnati Arch: A test of niche modeling methods for paleobiogeographic reconstruction; MS thesis.

>¤ Maguire, K.C., 2008. Paleobiogeography of Miocene to Pliocene Equinae of North America: A phylogenetic biogeographic and niche modeling approach; MS thesis.

>¤ GEOL 1010: Introduction to Geology

>¤ GEOL 2550: Historical Geology

>¤ GEOL 3/5410: Principles of Paleontology

>¤ GEOL 4/5430: Paleobiogeography

>¤ GEOL 4/5480: Paleoecology

>¤ GEOL 4/5540: Carbonate Depositional Systems I

>¤ GEOL 4/5540A: Carbonate Depositional Systems II: Carbonates of San Salvador, Bahamas

>¤ Paleontology Society

>¤ Palaeontological Association

>¤ Geological Society of America

>¤ International Biogeography Society

>¤ Society for Sedimentary Geology (SEPM)

>¤ Ohio University's Interdepartmental Paleontology Program

>¤ OHIO Center for Ecology and Evolutionary Studies

>¤ The Paleontology Portal