Long-distance wood procurement and the Chaco florescence
نویسندگان
چکیده
منابع مشابه
Long-distance wood procurement and the Chaco florescence.
First documented during a military reconnaissance in 1849, Chaco Canyon and the Ancestral Pueblo society that flourished therein [850–1140 Common Era (CE)] have been the focus of archaeological investigation for more than a century. Beginning in the early ninth century CE, the inhabitants of farming communities lining a 14-km stretch of the lower canyon in present-day northwest New Mexico erect...
متن کاملEleventh-century shift in timber procurement areas for the great houses of Chaco Canyon.
An enduring mystery from the great houses of Chaco Canyon is the origin of more than 240,000 construction timbers. We evaluate probable timber procurement areas for seven great houses by applying tree-ring width-based sourcing to a set of 170 timbers. To our knowledge, this is the first use of tree rings to assess timber origins in the southwestern United States. We found that the Chuska and Zu...
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OBJECTIVE Evaluate the addition of long-distance heart procurement on a heart transplant program and the status of heart transplant recipients waiting list. METHODS Between September 2006 and October 2012, 72 patients were listed as heart transplant recipients. Heart transplant was performed in 41 (57%), death on the waiting list occurred in 26 (36%) and heart recovery occurred in 5 (7%). Ini...
متن کاملEPO: A Knowledge Based System for Wood Procurement Management
Enso-Gut&t is a Finnish company operating in pulp and paper industry. It has 1200 employees and its annual turnover is 700 million US Dollars. For its factories and sawmills it requires more. than 600 million cubic feet of timber as raw material annually, equalling to about 4CQNXl truckloads. Most of the timber is loaded from forests located all around Finland. About 85% of the logs are transpo...
متن کاملEvidence of large-scale source-sink dynamics and long-distance dispersal among Wood Thrush populations.
Source-sink dynamics are commonly thought to occur among Wood Thrush (Hylocichla mustelina) and other songbird populations, allowing for the persistence of populations with negative growth rates ("sinks") through immigration from populations with positive growth rates ("sources"). Knowledge of source-sink dynamics is important for management and conservation because the removal of source habita...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2015
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1521904113