研究领域

I investigate environmental changes in the geologic and historic past, and the extent to which they have affected evolution and paleobiogeography, including changes in evolutionary rates, communities, and organismal morphology. The originations and extinctions of fossil taxa and their ecology/paleoecology are used to identify evolutionary, paleoceanographic, paleoclimatic and tectonic trends through time. Current research projects are listed below.

My students and I investigate environmental changes of the geological and historical past. The originations, extinctions and diversity of taxa, together with their ecology/paleoecology, are used to identify evolutionary, biogeographic, paleoceanographic, paleoclimatic and tectonic trends through time. Current research projects include the rise of the Isthmus of Panama, paleobiogeography of Caribbean deepsea benthic foraminifera, seagrass history and environmental changes in Florida Bay, the Gulf of Mexico oil spill, and degradation of coastal environments with human occupation (Panama) and sea-level change (SW Florida).

近期论文

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Collins, L.S., Aubry, M.-P., Berggren, W.A., and Coates, A.G. Regional correlation and paleoenvironments of tropical Neogene sequences of coastal Ecuador and Central America. Stratigraphy, in preparation. Collins, L.S., Cheng, J., Hayek, L., and Buzas, M.B., Seagrass changes in Florida Bay, 4,000 years ago to present. Palaeogeography, Palaeoclimatology, and Palaeoecology, in preparation. Collins, L.S., Geary, D.H., and Grossman, E.L., Variability of modern foraminiferal stable isotope ratios in Caribbean shallow waters: a framework for Neogene studies, in review for Palaeogeography, Palaeoclimatology, Palaeoecology. Gurocak-Orhun, O. [BS student], and Collins, L.S. Paleoenvironments of the Late Miocene Tuira Formation, Darien, Panama, in review for.Journal of Foraminiferal Research. Leon-Rodriguez, L. [MS student], and Collins, L.S. Neogene benthic foraminifera of Pacific Costa Rica – Panama, Journal of Foraminiferal Research, in preparation. Leon-Rodriguez, L. [MS student], and Collins, L.S. Rapid Pleistocene tectonic uplift of the Pacific margin of western Panama – eastern Costa Rica. Geology, in revision. Collins, L.S., and O’dea, A. Dedication to Anthony G. Coates, in O’dea, A., and Collins, L.S. (Eds.), Environmental, Ecological and Evolutionary Change in Seas Across the Isthmus of Panama. Bulletin of Marine Science, Special Issue, v. 89, no. 4, p. 767-768. O’dea, A., and Collins, L.S. (Editors). Environmental, Ecological and Evolutionary Change in Seas Across the Isthmus of Panama. Bulletin of Marine Science, v. 89, no. 4, p. 769-1035. O’dea, A., and Collins, L.S. Introduction, in O’dea, A., and Collins, L.S. (Eds.), Environmental, Ecological and Evolutionary Change in Seas Across the Isthmus of Panama. Bulletin of Marine Science, Special Issue, v. 89, no. 4, p. 769-777. Smith, C.J. [MS student], Collins, L.S., and Hayek, Lee-Ann. Biogeographic effects of the closing Central American Seaway on benthic foraminifera of Venezuela. Bulletin of Marine Science, Special Issue “Environmental, Ecological and Evolutionary Change in Seas Across the Isthmus of Panama,” O’Dea, A., & Collins, L.S. (Eds.), v. 89, no. 4, 921-936. Fourqurean, J.W., Kendrick, G.A., Collins, L.S., Chambers, R.M., and Vanderklift, M.A. Carbon, nitrogen and phosphorus storage in subtropical seagrass meadows: examples from Florida Bay and Shark Bay. Marine and Freshwater Research, 63: 967-983. Cheng, J. [PhD student], Collins, L.S., and Holmes, C.. Four thousand years of habitat change in Florida Bay, as indicated by benthic foraminifera. Journal of Foraminiferal Research, v. 42, no. 1, 3-17. Wachnicka, A. [PhD student], Collins, L.S., and Gaiser, E. Response of Diatom Assemblages to 130 years of environmental change in Florida Bay (U.S.A.). Journal of Paleolimnology, v. 49, no. 1, p. 83-101, DOI 10.1007/s10933-011-9556-3. Wachnicka, A. [PhD student], Gaiser, E., and Collins, L.S. Correspondence of historic salinity fluctuations in Florida Bay, USA, to atmospheric variability and anthropogenic activities. Journal of Paleolimnology, v. 49, no. 1, pp. 103-115, DOI 10.1007/s10933-011-9534-9. Smith, C. J. [MS student], Collins, L.S., Jaramillo, C., and Quiroz, L.I. Marine paleoenvironments of Neogene formations of north-cental Falcón State, Venezuela. Journal of Foraminiferal Research, v. 40, no. 3, p. 566-582. Wachnicka, A. [PhD student], Gaiser, E., Collins, L.S., Frankovitch, T., and Boyer, J. Distribution of diatoms and development of diatom-based models for inferring salinity and nutrient concentrations in Florida Bay (U.S.A.) and adjacent coastal wetlands. Estuaries and Coasts, DOI 10.1007/s12237-010-9283-4. Collins, L.S. Chapter 18. Micropaleontology of Central America, 17 pp. in Bundschuh, J., and Alvarado, G.E. (editors), Central America – Geology, Hazards and Resources: Balkema, The Netherlands, 1265 pp. Jain, S. [PhD student], and Collins, L.S. Trends in Caribbean paleoproductivity related to the Neogene closure of the Central American Seaway. Marine Micropaleontology, v. 63, pp. 57-74. Jain, S. [PhD student], Collins, L.S., and Hayek, L.-A. Relationship of benthic foraminiferal diversity to paleoproductivity in the Neogene Caribbean. Palaeogeography, Palaeoclimatology, Palaeoecology, v. 255, p. 223-245. Jackson, J.B.C., Jung, P., Coates, A.G., and Collins, L.S. 2007. Diversidad y extinción de moluscos de América tropical y surgimiento del istmo de Panamá. In: Leigh, Egbert G., Jr., Herre, Edward Allen, Jackson, Jeremy B. C. and Santos-Granero, Fernando, Ecología y evolución en los trópicos. Panama: Editora Nova Art, pp.328-332. Coates, A.G., McNeill, D.F., Aubry, M.-P., Berggren, W.A., and Collins, L.S. An introduction to the geology of the Bocas del Toro Archipelago, Panama. Caribbean Journal of Science, v. 41, no. 3, pp. 374-391. Coates, A.G., L.S. Collins, M.-P. Aubry, and W.A. Berggren. The geology of the Darien, Panama, and the late Miocene-Pliocene collision of the Panama arc with northwestern South America. Geological Society of America, Bulletin, v. 116, no. 11/12, pp. 1327-1344. Coates, A.G., M.-P. Aubry, W.A. Berggren,. L.S. Collins, and M. Kunk. Early Neogene history of the Central American arc from Bocas del Toro, western Panama. Geological Society of America, Bulletin, v. 115, no. 3, pp. 271-287. Cunningham, Kevin J., and L.S. Collins. Controls on facies and sequence stratigraphy of an upper Miocene carbonate ramp and platform, Melilla basin, NE Morocco. Sedimentary Geology, v. 146, no. 3/4, p. 285-304. Buzas, M.B., L.S. Collins, and S.J. Culver. Latitudinal difference in biodiversity caused by higher tropical rate of increase. Proceedings of the National Academy of Sciences, v. 99, no. 12, pp. 7841-7843.