2011 GSA Annual Meeting in Minneapolis (912 October 2011)
Paper No. 161-2
Presentation Time: 8:40 AM-8:55 AM


NEVLE, R.J., School of Earth Sciences, Stanford University, Stanford, CA 94305-2210, rnevle@stanford.edu, BIRD, D.K., Geological and Environmental Sciences, Stanford University, Stanford, CA 94305-2115, RUDDIMAN, W.F., Environmental Sciences, University of Virginia, Charlottesville, VA 22903, DULL, R.A., Department of Geography, University of Texas, Austin, TX 78712, and STINCHCOMB, G.E., Department of Geology, Baylor University, Waco, TX 76798-7354

Massive, pandemic-induced mortality in the Americas during European conquest yielded profound changes in human-landscape interaction identifiable in paleoecological and paleoclimatic records. Our recent synthesis of proxies of Neotropical fire and climate and atmospheric greenhouse gas concentrations and 13C/12C (Nevle et al., 2011) indicates a period of reduced biomass burning accompanied by >5 Gt C sequestration into terrestrial biomass after A.D. 1500. This finding is consistent with a major reduction in Neotropical landscape management by fire accompanied by massive reforestation. Reforestation of abandoned, previously humanized landscapes in Neotropical watersheds likely resulted in reduced surface runoff and sediment load and a consequent decrease in quantities of terrigenous sediment transported to marine and lacustrine basins. Future paleoecological and field investigations and ongoing review of extant paleoecological and paleoclimate proxy data will help to delineate the scale and intensity of ecological-hydrological changes resulting from reduced Neotropical landscape management after A.D. 1500.

2011 GSA Annual Meeting in Minneapolis (912 October 2011)
General Information for this Meeting
Session No. 161
The History of Humans and the Hydrologic System: Exploring Relationships between Cultures, Climate, and Hydrology through Time I
Minneapolis Convention Center: Room 101FG
8:00 AM-12:00 PM, Tuesday, 11 October 2011

Geological Society of America Abstracts with Programs, Vol. 43, No. 5, p. 399

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