@inbook {1419,
	title = {Late quaternary lake and swamp sediments: records of climate and environment},
	booktitle = {Central America: Geology, Resources, Hazards},
	volume = {1},
	year = {2007},
	note = {id: 622},
	month = {2007},
	pages = {423-441},
	publisher = {Taylor \& Francis/Balkema},
	organization = {Taylor \& Francis/Balkema},
	address = {Leiden, The Netherlands},
	author = {Horn, S. P.},
	editor = {Bundschuh, J.}
}
@inbook {1418,
	title = {Pre-Columbian maize agriculture in Costa Rice: Pollen and other evidence from lake and swamp sediments},
	booktitle = {Histories of Maize: Multidisciplinary Approaches to the Prehistory, Biogeography, Domestication, and Evolution of Maize},
	year = {2006},
	note = {id: 1113},
	month = {2006},
	pages = {367-380},
	publisher = {Elsevier Press},
	organization = {Elsevier Press},
	address = {San Diego, CA},
	author = {Horn, S. P.},
	editor = {Staller, J.}
}
@article {456,
	title = {A 2000-year reconstruction of forest disturbance from southern Pacific Costa Rica},
	journal = {Palaeogeography Palaeoclimatology Palaeoecology},
	volume = {221},
	year = {2005},
	note = {id: 1112; 931QJ Times Cited:14 Cited References Count:114},
	pages = {35-54},
	abstract = {We reconstruct prehistoric and historic human forest disturbance and vegetation change in southern Pacific Costa Rica, in the vicinity of the Las Cruces Biological Station and the La Amistad International Park and Biosphere Reserve. Pollen and charcoal in sediments from Laguna Santa Elena reveal a nearly continuous record of human alteration of these tropical forests over the past two millennia. The basal portion of the core shows nearly intact premontane forests approximately 1800 cal. year B.P., although there is evidence of human presence on the landscape in the form of maize pollen and charcoal. Clearing for agriculture resulted in the dominance of disturbance taxa in the watershed beginning at least 1400 cal. year B.P. The pollen record reveals a possible, brief hiatus in human occupation of the watershed at approximately 540 cal. year B.P., although secondary succession began to occur in the Laguna Santa Elena watershed prior to that time, beginning about 700 cal. year B.P. Three eruptions of nearby Volcan Baru which we date to approximately 610, 1080, and 1440 cal. year B.P., apparently had little direct effect on the prehistoric populations in the immediate vicinity of the lake. Historic and modern land clearance has perpetuated a modem vegetation assemblage of disturbance and successional taxa, (c) 2005 Elsevier B.V. All rights reserved.},
	issn = {0031-0182},
	doi = {10.1016/J.Palaeo.2005.02.003},
	author = {Anchukaitis, K. J. and Horn, S. P.}
}
@article {865,
	title = {Stable carbon isotope ratios in lake and swamp sediments as a proxy for prehistoric forest clearance and crop cultivation in the Neotropics},
	journal = {Journal of Paleolimnology},
	volume = {32},
	year = {2004},
	note = {881ycTimes Cited:30Cited References Count:36},
	month = {Nov},
	pages = {375-381},
	abstract = {Close correspondence between stable carbon isotope ratios (delta(13)C), pollen, and charcoal profiles in sediment cores from Laguna Zoncho and Machita swamp, Costa Rica, shows that prehistoric forest clearance and crop cultivation can be detected in the stable carbon isotope ratios of total organic carbon (delta(13)C(TOC)). Analyses of delta(13)C(TOC) complement evidence from pollen, charcoal, and phytoliths and provide a proxy that is sensitive to the intensity and/or proximity to core sites of prehistoric forest clearance and agriculture in watersheds. Stable carbon isotope analyses are particularly useful in situations in which other evidence of forest clearance and agriculture is limited.},
	issn = {0921-2728},
	doi = {10.1007/s10933-004-0259-x},
	author = {Lane, C. S. and Horn, S. P. and Mora, C. I.}
}
