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Paleoecological Studies at Lake Patzcuaro on the West-Central Mexican Plateau and at Chalco in the Basin of Mexico1

Published online by Cambridge University Press:  20 January 2017

W. A. Watts  and
J. Platt Bradbury
W. A. Watts
Affiliation:
Department of Botany, Trinity College, Ireland, and Limnological Research Center, University of Minnesota, Minneapolis, Minnesota 55455
J. Platt Bradbury
Affiliation:
U.S. Geological Survey, Denver, Colorado 80225
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Abstract

A 1520-cm sediment core from Lake Patzcuaro, Michoacan, Mexico, is 44,000 yr old at the base. All parts of the core have abundant pollen of Pinus (pine), Alnus (alder), and Quercus (oak) with frequent Abies (fir). The interval dated from 44,000 to 11,000 yr ago has a homogeneous flora characterized by abundant Juniperus (juniper) pollen and frequent Artemisia (sagebrush). It is believed to represent an appreciably drier and colder climate than at present. The Holocene at Lake Patzcuaro is characterized by a moderate increase in Pinus pollen and the loss of Juniperus pollen, as the modern type of climate succeeded. Alnus was abundant until about 5000 yr ago; its abrupt decrease with the first appearance of herbaceous weed pollen may reflect the cutting of lake-shore and stream-course alder communities for agricultural purposes, or it may simply reflect a drying tendency in the climate. Pollen of Zea (corn) appears at Lake Patzcuaro along with low peaks of chenopod and grass pollen at 3500 yr B.P. apparently recording a human population large enough to modify the natural environment, as well as the beginning of agriculture. A rich aquatic flora in this phase suggests eutrophication of the lake by slope erosion. In the most recent period corn is absent from the sediments, perhaps reflecting a change in agricultural practices. The environment changes at Lake Patzcuaro are similar to and correlate with those in the Cuenca de Mexico, where diatom stratigraphy from the Chalco basin indicates fluctuations in lake levels and lake chemistry in response to variations in available moisture. Before 10,000 yr ago climates there were cool and dry, and the Chalco basin was occupied by a shallow freshwater marsh that drained north to Lake Texcoco, where saline water accumulated by evaporation. Increases in effective moisture and possible melting of glaciers during the Holocene caused lake levels to rise throughout the Cuenca de Mexico, and Lake Texcoco flooded the Chalco basin with brackish water. After 5000 yr ago such flooding decreased, and shallow freshwater ponds and marshes were restored in the Chalco basin. This environmental change coincides with the appearance of Zea pollen and suggests cultural control of lake levels and salinity.

Type
Research Article
Information
Quaternary Research , Volume 17 , Issue 1 , January 1982 , pp. 56 - 70
Copyright
University of Washington

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Footnotes

1

Contribution 166, Limnological Research Center, University of Minnesota.

References

Bloomfield, K. Valastro, S. (1974). Late Pleistocene eruptive history of Nevado de Toluca volcano, Central Mexico. Geological Society of America Bulletin 85, 901–906.Google Scholar
Bonny, A.P. (1978). The effect of pollen recruitment processes on pollen distribution over the sediment surface of a small lake in Cumbria. Journal of Ecology 66, 385–416.Google Scholar
Bradbury, J.P. (1971). Paleolimnology of Lake Texcoco, Mexico. Evidence from diatoms. Limnology and Oceanography 16, 180–200.Google Scholar
Chadwick, R. (1971). Archaeological synthesis of Michoacan and adjacent regions. Handbook of Middle American Indians Wauchope, R. Eckholm, G.F. Bernal, I. Vol. II,University of Texas Press. Austin. 657–693Archaeology of Northern Meso-America, pt. 2.Google Scholar
Cholnoky, B.J. (1968). Die Oekologie der Diatomeen in Binnengewässern Cramer.Google Scholar
CLIMAP project members, . 1976. The surface of the Ice-Age Earth. Science 191, 1131–1136.CrossRefGoogle Scholar
Coe, M.D. (1964). The chinampas of Mexico. Scientific American 277, 90–98.Google Scholar
Cowgill, U.M. Hutchinson, G.E. Raček, A.A. Goulden, C.E. Patrick, R. Tsukada, M. (1966). The history of Laguna de Petenxil, a small lake in northern Guatemala. Connecticut Academy of Arts and Sciences Memoir 17, 1–126.Google Scholar
Davis, M.B. (1969). Climatic changes in southern Connecticut recorded by pollen deposition at Rogers Lake. Ecology 50, 409–422.Google Scholar
Deevey, E.S. (1944). Pollen analysis and Mexican archaeology: and attempt to apply the method. American Antiquity 10, 135–149.Google Scholar
Flannery, K.V. (1967). Vertebrate fauna and hunting patterns. The Prehistory of the Tehuacan Valley Byers, D.S. R. S. Peabody Foundation, University of Texas Press. Austinchapter 8.Google Scholar
Flores Mata, G. Jiménez López, J. Madrigal Sánchez, X. Moncayo Ruiz, F. Takaki Takaki, F. (1971). Tipos de vegetación de la Republica Mexicana Secretaria de Ricursos Hidraulicos. Mexico City(map and handbook).Google Scholar
González Quintero, L. Fuentes Mata, M. (1980). El Holoceno de la porción central de la Cuenca del Valle de México Memorias, III Coloquio sobre Paleobotánica y PalinologíaInstituto Nacional de Antropología e HistoriaColección Científica, Prehistoria No. 86 113–132.Google Scholar
Heine, K. Ohngemach, D. (1976). Die Pleistozän-Holozän-Grenze in Mexiko. Münster. Forsch. Geol. Paläont 38/39, 229–251.Google Scholar
Hutchinson, G.E. Patrick, R. Deevey, E.S. (1956). Sediment of Lake Patzcuaro, Michoacan, Mexico. Geological Society of America Bulletin 67, 1491–1504.CrossRefGoogle Scholar
Leavenworth, W.C. (1946). A preliminary study of the vegetation of the region between Cerro Tancitaro and the Rio Tepaltepec, Michoacán, México. American Midland Naturalist 36, 137–205.Google Scholar
Liddicoat, J.C. Coe, R.S. Lambert, P.W. Valastro, S. (1979). Paleomagnetic record in late Pleistocene and Holocene dry lake deposits at Tlapacoya, Mexico. Geophys. J. R. astr. Society 59, 367–377.CrossRefGoogle Scholar
Lorenzo, J.L. González Quintero, L. (1970). El más antiguo Teosinte. Boletín I.N.A.H. 42, 41–43.Google Scholar
Martinez, M. 3rd. ed. Las Pinaceas Mexicanas 1963 Universidad Nacional Autonoma de México.Google Scholar
Matheny, R.T. Gurr, D.L. (1979). Ancient hydraulic techniques in the Chiapas Highlands. American Scientist 67, 441–457.Google Scholar
McNeish, R.S. (1972). The Prehistory of the Tehuacán Valley: Chronology and Investigation Vol. 4,University of Texas Press. Austin.Google Scholar
Mirambell, L. (1978). Tlapacoya, a Late Pleistocene site in Central Mexico. Early Man in America Bryan, A.L. Dept. of Anthropology, University of Alberta. Edmonton. 221–230.Google Scholar
Mitchell, G.F. (1965). Littleton Bog, Tipperary: An Irish vegetational record. Geological Society of America Special Paper 84, 1–16.Google Scholar
Mooser, F. (1967). Tefracronología de la Cuenca de Mexico para los últimos treinta mil años. Bol. Inst. 30, 12–15Nac. Antropol. Hist..Google Scholar
Niederberger, C. (1979). Early sedentary economy in the basin of Mexico. Science 203, 131–142.Google Scholar
Palerm, A. (1968). The agricultural basis of urban civilization in Mesoamerica. Man in Adaption, the Cultural Present Cohen, Y.A. Aldine. Chicago. 348–361.Google Scholar
Parsons, J.R. (1974). The development of a prehistoric complex society: A regional perspective from the Valley of Mexico. Journal of Field Archaeology 1, 81–108.Google Scholar
Raynor, G.E. Odgen, E.C. Hayes, J.V. (1972). Dispersion and deposition of corn pollen from experimental sources. Agronomy Journal 64, 420–427.Google Scholar
Richardson, J.L. Harvey, T.J. Holdship, S.A. (1978). Diatoms in the history of shallow east African lakes. Polskie Archiwum Hydrobiologii 25,1/2 341–353.Google Scholar
Saporito, M.S. (1975). Chemical and mineral studies of a core from Lake Patzcuaro, Mexico. M.S. Thesis University of Minnesota.Google Scholar
Sears, P.B. (1952). Palynology in southern North America. Geological Society of America Bulletin 63, 521–530Part 1.Google Scholar
Sears, P.B. Clisby, K.H. (1955). Palynology in southern North America. Geological Society of America Bulletin 66, 521–530Part 4.CrossRefGoogle Scholar
Tsukada, M. (1964). Pollen morphology and indentification III. Modern and fossil tropical pollen with emphasis on Bombacaceae. Pollen et Spores 6, 393–462.Google Scholar
Tsukada, M. Rowley, J.R. (1964). Identification of modern and fossil maize pollen. Grana Palynologica 5, 406–412.Google Scholar
Tsukada, M. Deevey, E.S. (1967). Pollen analyses in Guatemala and El Salvador. Quaternary Palaeoecology Cushing, E.J. Wright, H.E. Jr.. Yale University Press. New Haven, Connecticut. 303–331.Google Scholar
Vaughan, H.H. (1979). Prehistoric disturbance of vegetation in the area of Lake Yaxha, Peten, Guatemala. Ph.D. dissertation University of Florida. Gainesville.Google Scholar
Vivo Escoto, J.A. (1964). Weather and climate in Mexico and Central America. Handbook of Middle American Indians Wauchope, R. volume 1,University of Texas Press. Austin. 187–215Natural Environment and Early Cultures.Google Scholar
Webb, T. III. 1974. Corresponding patterns of pollen and vegetation in lower Michigan: a comparison of quantitative data. Ecology 55, 17–28.Google Scholar