Measuring Late Quaternary Ursid Diminution in the Midwest

  title={Measuring Late Quaternary Ursid Diminution in the Midwest},
  author={Steve Wolverton and R. Lee Lyman},
  journal={Quaternary Research},
  pages={322 - 329}
Paleobiologists generally agree that within the past 10,000 yr North American black bears (Ursus americanus) have decreased in body and tooth size. Some researchers infer that diminution was gradual and continuous; thus, one might infer that a specimen is old if it is larger than an average-size modern bear. Ursid remains recovered in the 1950s from Lawson Cave, Missouri, that are larger than some modern bears have been reported to date to the late Pleistocene, but association with modern taxa… 

Comments on Late Quaternary Ursids from the Texas/Oklahoma Southern Plains, with documentation of the last known native Black Bear (Ursus Americanus) from the Texas Hill Country /

The black bear (Ursus americanus) is one of many species that has been considered as experiencing a decline in size since the Pleistocene. Age has perhaps not been fully appreciated as a factor

Late Pleistocene Remains of an American black bear (Ursus americanus) and Two Small Vertebrates from an Oklahoma Ozark Cave

The serendipitous discovery of fossil bear bones in a cave in northeastern Oklahoma prompted us to excavate and describe the fossils and their geologic, chronologic, and biogeographic context. We

Characteristics of Late Holocene American Black Bears in Missouri: Evidence From Two Natural Traps

Abstract Remains of 22 American black bears (Ursus americanus) were excavated from 2 natural trap caves in Missouri during the late 1950s. Age, sex, and size characteristics based on analysis of

A Partially Articulated Black Bear (Ursus americanus) from Late Quaternary Deposits in the Tonto National Forest, Central Arizona

  • Michael R. Pasenko
  • Environmental Science
    Journal of the Arizona-Nevada Academy of Science
  • 2018
The Red Creek bear indicates a continued presence of black bears from the late Quaternary to the present in central Arizona.

Paleozoological stable isotope data for modern management of historically extirpated Missouri black bears (Ursus americanus)

Human population growth and intensification of resource extraction during the 19 century changed the American landscape. Deforestation, residential sprawl and hunting activities impacted the behavior

Ecogeographic size variation in small-bodied subfossil primates from Ankilitelo, southwestern Madagascar.

  • K. MuldoonE. Simons
  • Geography, Environmental Science
    American journal of physical anthropology
  • 2007
In general, the primates from Ankilitelo are indeed larger than their modern counterpart, however, these differences fit an ecoregional model of size variation, whereby ankleilitelo species are comparable in size to living forms inhabiting e coregions present near the cave today.

Climate effects on mammalian body size and grassland composition inferred from late Quaternary grazers in the Great Plains of North America

Several mammalian taxa exhibited a diminution during the Pleistocene-Holocene transition. Two hypotheses have been proposed to explain this phenomenon: (1) human hunting and (2) climate change along

Natural-trap ursid mortality and the Kurtén Response.

  • Steve Wolverton
  • Environmental Science, Geography
    Journal of human evolution
  • 2006

Illinoian to Late Wisconsinan stratigraphy at Woodbridge, Ontario

Near Woodbridge, northwest of Toronto, Ontario, a 15 metre-high railroad cut and associated borrow pit, first excavated in 1962, exposed a multiple till sequence and intervening fossiliferous



An Ice Age Refugium for Large Mammals in the Alexander Archipelago, Southeastern Alaska

Genetic and paleontological evidence are combining to provide a new and surprising picture of mammalian biogeography in southeastern Alaska. Prior to our study, the brown and black bears of the

An Analysis of the Chronology of Late Pleistocene Mammalian Extinctions in North America

  • D. Grayson
  • Geography, Environmental Science
    Quaternary Research
  • 1987

Carnivore Size and Quaternary Climatic Change in Southern Africa

  • R. Klein
  • Environmental Science, Geography
    Quaternary Research
  • 1986

Carnivore Size and Quaternary Climatic Change in Southern Africa

  • S. Africa
  • Environmental Science, Geography
  • 1986
The relationship between carnassial length and latitude south is analyzed for 17 African carnivore species to determine if individuals tend to be larger in cooler climates, as predicted by Bergmann’s

Measurement of Significant Marine Paleotemperature Variation Using Black Abalone Shells from Prehistoric Middens

Abstract The archaeological record from the last millennium in southern California indicates that a period of significant cultural change was associated with a reported marine paleoenvironmental

Calibrating the paleothermometer: climate, communities, and the evolution of size

Recent sizeGradients of mammals should be screened for the possibility of character displacement if fossil size gradients are to be used as a "paleothermometer" for past climate.

Archaeological Kill Site Populations and the Holocene Evolution of the Genus Bison

Over a period of several years, I have examined a large number of bison specimens and bison population samples from the Holocene of the northern Great Plains. Much of my attention has been directed