RECENT PUBLICATIONS:

2000                        Horn, S.P., Orvis, K.H., Kennedy, L.M., and Clark, G.M.  Prehistoric Fires in the Highlands of the Dominican Republic: Evidence from Charcoal in Soils and Sediments. Caribbean Journal of Science  36(1–2): 10–18. 

2000                        Orvis, K.H. and Horn, S.P.  Quaternary Glaciers and Climate on Cerro Chirripó, Costa Rica.  Quaternary Research 54: 24–37.

2000                        Lafon, C.W., Huston, M.A., and Horn, S.P. Effects of Agricultural Soil Loss on Forest Succession Rates and Tree Diversity in East Tennessee.  Oikos, 90: 431–441..  

2000                        Sanford, Jr., R.L. and Horn, S.P.  Holocene Rain-forest Wilderness: A Neotropical Perspective on Humans as an Exotic, Invasive Species.  Pp. 68–173 In Cole, D.N., and McCool, S.F. (Eds.), Proceedings: Wilderness Science in a Time of Change, Vol. 3.  Ogden, Utah: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station.

2000                        League, B.L. and Horn, S.P. A 10,000 Year Record of Páramo Fires in Costa Rica.  Journal of Tropical Ecology, 16: 747–752.

2000                        Horn, S.P.  Review of Paramos: A Checklist of Plant Diversity, Geographical Distribution, and Botanical Literature by J. Luteyn.  Mountain Research and Development 20(1): 99–100.

2001                        Horn, S.P. and Kennedy, L.M.  Pollen Evidence of Maize Cultivation 2700 Years Ago at La Selva Biological Station, Costa Rica.  Biotropica 33(1): 191–196.

2001                        Clement, R.M. and Horn, S.P. PreColumbian Land Use History in Costa Rica: A 3000-year Record of Forest Clearance, Agriculture, and Fires from Laguna Zoncho. The Holocene 11(4): 419–426

2001                        Horn, S.P., Kennedy, L.M, and Orvis, K.H.  Vegetation Recovery Following a High Elevation Fire in the Dominican Republic.  Biotropica 33(4): 701–708.

2001                        Horn, S.P. The Age of the Hule Explosion Crater, Costa Rica, and the Timing of Subsequent Tephra Eruptions: Evidence from Lake Sediments.  Revista Geológica de America Central  24: 57–66.

2001                        Horn, S.P.  Review of Flora of the Gran Desierto and Río Colorado of Northwestern Mexico, by R.S. Felger.  Journal of Ethnobiology 21(2): 129–131.

2001                        Horn, S.P.  Review of Life in the Treetops: Adventures of a Woman in Field Biology, by M.D. Lowman.  The Geographical Review 91(4): 737–739.

2002                        Clark, G.M., Horn, S.P., and Orvis, K.H.  High-Elevation Savanna Landscapes in the Cordillera Central, Dominican Republic, Hispaniola: Dambos in the Caribbean?  Mountain Resesarch and Development 22(3): 288–295.

2002                        Presentación.  Pp. ix–xi In Monge-Nájera, J., Gómez F., P. and Rivas R., M.  Biología General.  San José, Costa Rica: Editorial Universidad Estatal y Distancia.

2003                        Horn, S.P., Sanford, Jr., R.L., Dilcher, D., Lott, T.A., Renne, P. R., Wiemann, M.C., Cozadd, D., and Vargas, O.  Pleistocene Plant Fossils in and Near La Selva Biological Station, Costa Rica.  Biotropica 35(3): 434–441.  

2003                        Haberyan, K.A., Horn, S.P., and Umaña V., G.  Basic Limnology of 51 Lakes in Costa Rica.  Revista de Biología Tropical 51(1): 107–122.

2004                        Speer, J.H., Orvis, K.H, Grissino-Mayer, H.D., Kennedy, L.M., and Horn, S.P.  Assessing the Dendrochronological Potential of Pinus occidentalis Swartz in the Cordillera Central of the Dominican Republic.  The Holocene 14(4): 563–569.

2004                        Lane, C.S., Horn, S.P., and Mora, C.I.  Stable Carbon Isotope Ratios in Lake and Swamp Sediments as a Proxy for Prehistoric Forest Clearance and Crop Cultivation in the Neotropics.  Journal of Paleolimnology 32: 375–381.

2004                        Arford, M.R. and Horn, S.P.  Pollen Evidence of the Earliest Maize Agriculture in Costa Rica.  Journal of Latin American Geography 3(1): 108-115.

2005                        Driese, S.G., Li, Z-H, and Horn, S.P.  Late Pleistocene and Holocene Climate and Geomorphic Histories Interpreted from 23,000 14C yr B.P. Paleosol and Floodplain Soils, Southeastern West Virginia, USA.  Quaternary Research 63: 136–149.

2005                        Haberyan, K.A., and Horn, S.P.  2005.  Diatom Paleoecology of Laguna Zoncho, Costa Rica. Journal of Paleolimnology 33: 361–369.

2005                        Anchukaitis, K., and Horn, S.P.  2005.  A 2000-year Reconstruction of Forest Disturbance From Southern Pacific Costa Rica.  Palaeogeography, Palaeoclimatology, Palaeoecology 221: 35–54.

2005                        Orvis, K.H., Lane, C.S., and Horn, S.P.  Laboratory Production of Vouchered Reference Charcoal From Small Woody Samples and Non-woody Plant Tissues.  Palynology 29: 1–11.

2005                        Kennedy, L.M., Horn, S.P., and Orvis, K.H.  Modern Pollen Spectra from the Highlands of the Cordillera Central, Dominican Republic.  Review of Palaeobotany and Palynology 137: 51–68.

2005                        M. Kappelle and S. Horn (Eds.). Páramos de Costa Rica.  Santo Domingo, Costa Rica.: Insitituto Nacional de Biodiversidad, INBio. 

2005                        Horn, S.P., Orvis, K.H., and Haberyan, K.A.  Limnología de Las Lagunas Glaciales en el Páramo del Chirripó, Costa Rica.  (Limnology of Glacial Lakes in the Chirripó Páramo of Costa Rica.).  Pp. 161–181 In Kappelle, M. and Horn, S. (Eds.), Páramos de Costa Rica.  Santo Domingo, Costa Rica.: Insitituto Nacional de Biodiversidad, INBio. 

2005                        Orvis, K.H. and Horn, S.P.  Los Glaciares Cuaternarios y el Clima del Cerro Chirripó, Costa Rica (Quaternary Glaciers and Climate of Cerro Chirripó, Costa Rica).  Pp. 185–213 In Kappelle, M. and Horn, S. (Eds.), Páramos de Costa Rica.  Santo Domingo, Costa Rica.: Insitituto Nacional de Biodiversidad, INBio.

2005                        Horn, S.P. and League, B.L.  Registros de Sedimentos Lacustres de la Vegetación del Holoceno y Historia del Fuego en el Páramo de Costa Rica.  (Lake-Sediment Records of Holocene Vegetation and Fire History in the Costa Rican Páramos.).  Pp. 253–273 In Kappelle, M. and Horn, S. (Eds.), Páramos de Costa Rica.  Santo Domingo, Costa Rica.: Insitituto Nacional de Biodiversidad, INBio.

2005                        Haberyan, K.A. and Horn, S.P.  Un Registro de Diatomeas Que Cubre 10.000 Años, del Lago de las Morrenas 1, Parque Nacional Chirripó, Costa Rica (A 10,000-year Diatom Record from Lago de las Morrenas 1, Chirripó National Park, Costa Rica).  Pp. 275–285 In Kappelle, M. and Horn, S. (Eds.), Páramos de Costa Rica.  Santo Domingo, Costa Rica.: Insitituto Nacional de Biodiversidad, INBio.

2005                        Kappelle, M., Haberyan, K.A., and Horn, S.P.  Algas Fósiles y Recientes de los Páramos de Costa Rica.  (Fossil and Recent Algae from the Costa Rican Páramos).  Pp. 331–341 In Kappelle, M. and Horn, S. (Eds.), Páramos de Costa Rica.  Santo Domingo, Costa Rica.: Insitituto Nacional de Biodiversidad, INBio.

2005                        Horn, S.P. Dinámica de L Vegetación Después de Fuegos Recientes en los Páramos de Buenavista y Chirripó, Costa Rica (Vegetation Dynamics Following Recent Fires in the Buenavista and Chirripó Páramos of Costa Rica.).  Pp. 631–655 In Kappelle, M. and Horn, S. (Eds.), Páramos de Costa Rica.  Santo Domingo, Costa Rica.: Insitituto Nacional de Biodiversidad, INBio.

2006                        Kennedy, L.M., Horn, S.P., and Orvis, K.H.  A 4000-yr Record of Fire and Forest History from Valle de Bao, Cordillera Central, Dominican Republic.  Palaeogeography, Palaeoecology, Palaeoclimatology 231: 279–290.

                                Horn, S.P.  Pre-Columbian Maize Agriculture in Costa Rica: Pollen and Other Evidence from Lake and Swamp Sediments.  In  Staller, J., Tykot, R., and Benz, B.  (Eds.), Histories of Maize: Multidisciplinary Approaches to the Prehistory, Biogeography, Domestication, and Evolution of Maize.  San Diego, CA: Elsevier Press, forthcoming.

                                Horn, S.P.  Late Quaternary Lake and Swamp sediments:  Climate and environment.  In Bundschuh, J. and Alvarado I., G.E.  (Eds.), Central America: Geology, Resources, Hazards.  Leiden, The Netherlands: Balkema Publishers (Taylor & Francis Group), forthcoming.