scholarly journals Confirming a Cultural Association at the La Prele Mammoth Site (48CO1401), Converse County, Wyoming

2020 ◽  
Vol 85 (3) ◽  
pp. 554-572 ◽  
Author(s):  
Madeline E. Mackie ◽  
Todd A. Surovell ◽  
Matthew O'Brien ◽  
Robert L. Kelly ◽  
Spencer Pelton ◽  
...  
Keyword(s):  
North America ◽  
Residue Analysis ◽  
Spatial Association ◽  
Spatial Distributions ◽  
New Work ◽  
Microwear Analysis ◽  
Close Proximity ◽  
Terminal Pleistocene ◽  
Small Tool

Archaeologists have long subjected Clovis megafauna kill/scavenge sites to the highest level of scrutiny. In 1987, a Columbian mammoth (Mammuthus columbi) was found in spatial association with a small artifact assemblage in Converse County, Wyoming. However, due to the small tool assemblage, limited nature of the excavations, and questions about the security of the association between the artifacts and mammoth remains, the site was never included in summaries of human-killed/scavenged megafauna in North America. Here we present the results of four field seasons of new excavations at the La Prele Mammoth site that confirm the presence of an associated cultural occupation based on geologic context, artifact attributes, spatial distributions, protein residue analysis, and lithic microwear analysis. This new work identified a more extensive cultural occupation including the presence of multiple discrete artifact clusters in close proximity to the mammoth bone bed. This study confirms the presence of a second Clovis mammoth kill/scavenge site in Wyoming and shows the value in revisiting proposed terminal Pleistocene kill/scavenge sites.

Aquaculture in North America: An Assessment of Future Prospects

1982 ◽  
Vol 39 (1) ◽  
pp. 151-154 ◽  
Author(s):  
P. A. Larkin
Keyword(s):  
North America ◽  
Large Scale ◽  
Geographical Location ◽  
Aquatic Environments ◽  
Future Prospects ◽  
Growing Period ◽  
Close Proximity ◽  
Cheap Alternative ◽  
Alternative Sources ◽  
Simple Technology

The farming of aquatic environments is already a large-scale world enterprise involving relatively simple technology, but aquacultural production in North America is only a small part of the world total. Aquaculture is only economically rewarding where high rates of production over a long growing period can be coupled with close proximity to large markets in which there are few cheap alternative sources of protein. Much of North American aquaculture is aimed at meeting demands of recreational fishermen rather than as a way of producing food. There are many opportunities for development of aquaculture in North America and it seems reasonable to project substantial increases in production in the next two decades.Key words: aquaculture, geographical location, North America, future prospects, economics

The State of Scientific Inquiry in Colonial Spanish America During the Enlightenment: A Preliminary Bibliography

1975 ◽  
Vol 31 (4) ◽  
pp. 488-500
Author(s):  
Leo M. Jacques
Keyword(s):  
North America ◽  
Scientific Knowledge ◽  
Scientific Inquiry ◽  
Time Lag ◽  
Spanish America ◽  
The Other ◽  
Spanish American ◽  
Scholarly Journals ◽  
The Enlightenment ◽  
Close Proximity

The scientific contributions of native scholars in the Americas have often been overlooked or neglected. The simultaneous discoveries of European scientists reached a wider audience because of the number of education centers in close proximity. The existence of several scholarly journals also facilitated the rapid dispensation of new scientific knowledge. Although Spanish American scholars lived far from the centers of European knowledge, there was no appreciable time lag between European discoveries and their circulation in Spain's colonies. On the other hand, Spanish American discoveries were unknown in Europe or North America except to a handful of prominent scholars.

Human biogeography and climate change in Siberia and Arctic North America in the fourth and fifth millennia BP

1990 ◽  
Vol 330 (1615) ◽  
pp. 665-670 ◽  
Keyword(s):  
North America ◽  
The Arctic ◽  
Polar Regions ◽  
Before Present ◽  
Yenisei River ◽  
Northeastern Asia ◽  
Time Period ◽  
The Yenisei River ◽  
Historical Relation ◽  
Small Tool

This paper explores the relation between the geographic shifts in prehistoric hunting populations and changes in climate between 4500 and 3000 before present (BP) within the polar regions from the Yenisei River in Siberia to Greenland. We have chosen this time period because major human geographic changes occurred over much of northeastern Asia and northern North America, and because these changes appear to be linked, at least in part, to a palaeoclimatic fluctuations. The cultures under consideration have been termed the Early and Middle Neolithic (Syalakh and Bel’kachi) in Siberia and the Arctic Small Tool Tradition (with such local variants as Denbigh, Independence I, Pre-Dorset, and Sarqaq) in North America. Despite these terminological differences, these groups shared such a close similarity in their technology and adaptive patterns that they must have once shared a direct historical relation.

scholarly journals A new genus of horse from Pleistocene North America

2017 ◽  
Author(s):  
Peter D. Heintzman ◽  
Grant D. Zazula ◽  
Ross D.E. MacPhee ◽  
Eric Scott ◽  
James A. Cahill ◽  
...  
Keyword(s):  
North America ◽  
New World ◽  
New Genus ◽  
Single Species ◽  
Geographic Range ◽  
Crown Group ◽  
Limb Bones ◽  
Morphometric Analyses ◽  
Extinction Event ◽  
Terminal Pleistocene

AbstractThe extinct “New World stilt-legged”, or NWSL, equids constitute a perplexing group of Pleistocene horses endemic to North America. Their slender distal limb bones resemble those of Asiatic asses, such as the Persian onager. Previous palaeogenetic studies, however, have suggested a closer relationship to caballine horses than to Asiatic asses. Here, we report complete mitochondrial and partial nuclear genomes from NWSL equids from across their geographic range. Although multiple NWSL equid species have been named, our palaeogenomic and morphometric analyses support the idea that there was only a single species of middle to late Pleistocene NWSL equid, and demonstrate that it falls outside of crown group Equus. We therefore propose a new genus, Haringtonhippus, for the sole species H. francisci. Our combined genomic and phenomic approach to resolving the systematics of extinct megafauna will allow for an improved understanding of the full extent of the terminal Pleistocene extinction event.

scholarly journals Scale and strength of oak–mesophyte interactions in a transitional oak–hickory forest

2018 ◽  
Vol 48 (11) ◽  
pp. 1366-1372 ◽  
Author(s):  
David Allen ◽  
Christopher W. Dick ◽  
Ethan Strayer ◽  
Ivette Perfecto ◽  
John Vandermeer
Keyword(s):  
North America ◽  
Census Data ◽  
Spatial Association ◽  
Acer Rubrum ◽  
Forest Plot ◽  
Eastern North America ◽  
Red Maple ◽  
Growth And Survival ◽  
Shade Tolerant Species ◽  
Compositional Changes

Forests in eastern North America are undergoing rapid compositional changes as they experience novel climate, disturbance, and pest conditions. One striking pattern is the replacement of canopy oaks (Quercus spp.) by mesic, fire-sensitive, shade-tolerant species like red maple (Acer rubrum L.). To gain insight into the successional patterns driving stand-level canopy oak replacement, we ask two questions: (i) What is the spatial association of oak and mesophyte recruitment compared with oak and mesophyte overstory individuals, and (ii) How do oaks and mesophytes differentially respond to canopy openings. We analyzed census data from a 23 ha forest plot surveyed in 2003, 2008, and 2014. We show that oak recruits are negatively associated with overstory red maples and black cherries (Prunus serotina Ehrh.), whereas mesophytic recruits were positively associated with overstory oaks. Second, we found that proximity to a dead overstory tree increased growth and survival for black cherries, increased growth for red maples, but had no effect on oaks. Black cherries and red maples are therefore better suited than oaks to take advantage of canopy openings and the moderate light available under adult oaks. These same fine scale competitive processes are contributing to canopy oak replacement across eastern North America.

scholarly journals Winter Storm Tracks and Related Weather in the NCEP Climate Forecast System Weeks 3–4 Reforecasts for North America

2019 ◽  
Vol 34 (3) ◽  
pp. 751-772 ◽  
Author(s):  
Katherine E. Lukens ◽  
Ernesto Hugo Berbery
Keyword(s):  
North America ◽  
Weather Prediction ◽  
Storm Track ◽  
Storm Tracks ◽  
Spatial Distributions ◽  
Climate Forecast ◽  
Winter Weather ◽  
Forecast System ◽  
Climate Forecast System ◽  
Ncep Climate Forecast System

Abstract This article examines to what extent the NCEP Climate Forecast System (CFS) weeks 3–4 reforecasts reproduce the CFS Reanalysis (CFSR) storm-track properties, and if so, whether the storm-track behavior can contribute to the prediction of related winter weather in North America. The storm tracks are described by objectively tracking isentropic potential vorticity (PV) anomalies for two periods (base, 1983–2002; validation, 2003–10) to assess their value in a more realistic forecast mode. Statistically significant positive PV biases are found in the storm-track reforecasts. Removal of systematic errors is found to improve general storm-track features. CFSR and Reforecast (CFSRR) reproduces well the observed intensity and spatial distributions of storm-track-related near-surface winds, with small yet significant biases found in the storm-track regions. Removal of the mean wind bias further reduces the error on average by 12%. The spatial distributions of the reforecast precipitation correspond well with the reanalysis, although significant positive biases are found across the contiguous United States. Removal of the precipitation bias reduces the error on average by 25%. The bias-corrected fields better depict the observed variability and exhibit additional improvements in the representation of winter weather associated with strong-storm tracks (the storms with more intense PV). Additionally, the reforecasts reproduce the characteristic intensity and frequency of hazardous strong-storm winds. The findings suggest a potential use of storm-track statistics in the advancement of subseasonal-to-seasonal weather prediction in North America.

Regional variation in the terminal Pleistocene and early Holocene radiocarbon record of eastern North America

2013 ◽  
Vol 79 (2) ◽  
pp. 175-188 ◽  
Author(s):  
D. Shane Miller ◽  
Joseph A.M. Gingerich
Keyword(s):  
North America ◽  
Regional Variation ◽  
Probability Distributions ◽  
Younger Dryas ◽  
Eastern North America ◽  
Northeastern United States ◽  
Radiocarbon Dates ◽  
Terminal Pleistocene ◽  
The Relationship ◽  
Data Result

AbstractIn this paper we use radiocarbon dates to evaluate the signature of the Younger Dryas Chronozone (YDC) in eastern North America. Using an approach that examines radiocarbon dates by region, we argue that the northeastern United States shows a better overall representation of radiocarbon dates when compared to the Mid-Atlantic and Southeast. These data result in a peak in summed probability distributions during the YDC, which is often interpreted as evidence of population growth. Further examination of these distributions, however, illustrates that differential standard deviations, varying sample size, and the effect of taphonomic and research biases likely overwhelm any demographic signatures in our study sample. Consequently, the frequency of radiocarbon dates by itself is insufficient for understanding the relationship between climate, culture and demography in eastern North America.

scholarly journals Footprints preserve terminal Pleistocene hunt? Human-sloth interactions in North America

2018 ◽  
Vol 4 (4) ◽  
pp. eaar7621 ◽  
Author(s):  
David Bustos ◽  
Jackson Jakeway ◽  
Tommy M. Urban ◽  
Vance T. Holliday ◽  
Brendan Fenerty ◽  
...  
Keyword(s):  
North America ◽  
Terminal Pleistocene
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