Fire-reliant subsistence economies and anthropogenic coniferous ecosystems in the Pre-Columbian northern American Southwest

Archaeologists working in the vast coniferous uplands of the American Southwest have commonly assumed that the subsistence economies of the prehistoric peoples who dwelt there focused on corn (Zea mays) agriculture, the erratic yields of which were supplemented with the unintensive collection of wil...

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Bibliographic Details
Published in:Vegetation history and archaeobotany 2014-05, Vol.23 (Suppl 1), p.S135-S151
Main Authors: Sullivan, Alan P., Forste, Kathleen M.
Format: Article
Language:English
Subjects:
Agricultural management
America and Arctic regions
Anthropogenic factors
Anthropology
Archaeology
Biogeosciences
Biomass
Biomass burning
Burning
Canyons
Climate Change
Controlled burning
Corn
Cultivation
DISCUSSION
Earth and Environmental Science
Earth Sciences
Economic conditions
Ecosystems
Environmental studies
Fire ecology
Flora
Forest fires
Grain cultivation
Methodology and general studies
Niches
North America
Paleontology
Pinyon juniper
Plants
Plants (botany)
Pollen
Prehistory and protohistory
Prescribed fire
Productivity
Subsistence farming
Sustainable agriculture
Sustainable practices
Understory
Woodlands
Zea mays
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Summary:Archaeologists working in the vast coniferous uplands of the American Southwest have commonly assumed that the subsistence economies of the prehistoric peoples who dwelt there focused on corn (Zea mays) agriculture, the erratic yields of which were supplemented with the unintensive collection of wild plants. In this paper, we develop an alternative to this orthodox view, in which we posit that human-controlled burning of understory biomass was a vegetation-community and successional-stage management strategy intended to propagate wild plants in bulk quantities. By comparing the relative frequencies and ubiquities of macrobotanical remains recovered from a variety of storage and consumption contexts with pollen frequencies from production and processing contexts, we show that the systematic encouragement of ruderals in pyrogenic resource patches ("niches") was a sustainable practice that overcame natural limitations to biomass productivity and corn cultivation in pinyon-juniper (Pinus edulis and Juniperus sp.) woodlands. Importantly, these analyses indicate that low-intensity burning was a key aspect of fire-reliant subsistence economies that generated anthropogenic ecosystems whose composition and productivity were markedly different from today's.
ISSN:0939-6314
1617-6278
DOI:10.1007/s00334-014-0434-6