A5035643169- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Evolution and Paleontology Studies
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Isotope Analysis in Ecology
- Ecology and biodiversity studies
- Ecology and Vegetation Dynamics Studies
- Archaeology and Natural History
- Archaeology and ancient environmental studies
- Animal Ecology and Behavior Studies
- Botany, Ecology, and Taxonomy Studies
- Forensic Anthropology and Bioarchaeology Studies
- Forest Ecology and Biodiversity Studies
- Morphological variations and asymmetry
- Genetic diversity and population structure
- Rangeland and Wildlife Management
- Fire effects on ecosystems
- Lichen and fungal ecology
- Bat Biology and Ecology Studies
- Radioactive contamination and transfer
- Geological and Geophysical Studies
- Forest Insect Ecology and Management
- Invertebrate Taxonomy and Ecology
- Mechanical and Thermal Properties Analysis
Colorado School of Mines
2019-2022
Pennsylvania State University
2009-2019
Ecological Society of America
2018
John Wiley & Sons (United States)
2018
University of South Dakota
2018
Curtin University
2003-2008
Denver Museum of Nature and Science
1999-2003
Illinois State Museum
1986-1997
Raigmore Hospital
1989
University of Iowa
1976
Analyses of fossil mammal faunas from 2945 localities in the United States demonstrate that geographic ranges individual species shifted at different times, directions, and rates response to late Quaternary environmental fluctuations. The pattern faunal provinces was similar for Pleistocene Holocene, but differing gradients resulted dissimilar composition these biogeographic regions. Modern community patterns emerged only last few thousand years, many communities do not have modern analogs....
Abstract The Neotoma Paleoecology Database is a community-curated data resource that supports interdisciplinary global change research by enabling broad-scale studies of taxon and community diversity, distributions, dynamics during the large environmental changes past. By consolidating many kinds into common repository, lowers costs paleodata management, makes paleoecological openly available, offers high-quality, curated resource. Neotoma’s distributed scientific governance model flexible...
Relict woolly mammoth (Mammuthus primigenius) populations survived on several small Beringian islands for thousands of years after mainland went extinct. Here we present multiproxy paleoenvironmental records to investigate the timing, causes, and consequences disappearance from St. Paul Island, Alaska. Five independent indicators extinction show that mammoths until 5,600 ± 100 y ago. Vegetation composition remained stable during window, there is no evidence human presence island before 1787...
Preliminary Table of Contents: List Contributors Preface 1. Sloth Remains from North American Caves and Associated Karst Features H. Gregory McDonald 2. The Late Wisconsin Vertebrate History Prince Wales Island, Southeast Alaska Timothy Heaton Fredrick Grady 3. Arvicoline Rodents Screaming Neotoma Cave, Southern Colorado Plateau, Apache County, Arizona, with Comments on the Pleistocene Biogeography Lemmiscus curtatus Christopher J. Bell Jennifer Glennon 4. Faunas in Eastern Grand Canyon,...
Stone tools characteristic of the Clovis culture have been found in direct association with bones American mastodon at Kimmswick, Missouri. The vertebrate fauna from components suggests a deciduous woodland and meadow habitat. Such an environmental reconstruction provides new perspective for adaptations ecological tolerances Mammut americanum.
Research Article| October 01, 1999 First accelerator mass spectrometry 14C dates documenting contemporaneity of nonanalog species in late Pleistocene mammal communities Thomas W. Stafford, Jr; Jr 1Institute Arctic and Alpine Research, University Colorado, Boulder, Colorado 80309, USA Search for other works by this author on: GSW Google Scholar Holmes A. Semken, 2Department Geology, Iowa, Iowa City, 52242, Russell Graham; Graham 3Department Earth Sciences, Denver Museum Natural History,...
Palaeoenvironmental records from the now-submerged Bering Land Bridge (BLB) covering Last Glacial Maximum (LGM) to present are needed document changing environments and connections with dispersal of humans into North America. Moreover, terrestrially based environmental changes in close proximity re-establishment circulation between Pacific Atlantic Oceans following end last glaciation test palaeo-climate models for high latitudes. We first terrestrial temperature hydrologic reconstructions...
Small mammal species distribution, density, and composition of modern Pleistocene faunas from the eastern United States provide information about environmental gradients. Higher summer temperatures less effective moisture along a transect northeast to southwest can be correlated with distribution small mammals as well decreases in total number shrew vole species. Relative frequencies “boreal”, “deciduous”, “steppe” are more equal late Wisconsin than which predominantly composed only one...
ABSTRACT Data, whether images, measurements, counts, occurrences, or character codings, are a cornerstone of vertebrate paleontology. Every published paper, master's thesis, and doctoral dissertation relies on these data to document patterns processes in evolution, ecology, taphonomy, geography, geologic time, functional morphology, name just few. In turn, the paleontology community order reproduce verify others' work, as well expand upon analyses new ways without having reconstitute sets...
Earth has experienced five major extinction events in the past 450 million years. Many scientists suggest we are now witnessing a sixth, driven by human impacts. However, it been difficult to quantify real extent of current episode, either for given taxonomic group at continental scale or worldwide biota, largely because comparisons pre-anthropogenic and anthropogenic biodiversity baselines have unavailable. Here, compute those mammals temperate North America, using sampling-standardized...
Abstract Cave, a lava tube cave on St. Paul Island in the Pribilofs, has recently produced mid-Holocene vertebrate faunal assemblage including woolly mammoth, polar bear, caribou, and Arctic fox. Several dates mammoth remains converge 5700 14 C yr BP. These dates, ~ 2300 younger than previously published from Pribilof Islands, make these youngest of proboscideans, non-extinct Quaternary megafauna, recovered North America. Persistence mammoths Pribilofs is most parsimoniously explained by...
Spatial and temporal variations in human populations are, to a large extent, determined by the environmentally controlled distribution of biotic abiotic resources. While archaeologists generally recognize this relationship, many fail fully appreciate complexity either changing environment, ecological literature, or applications data archaeological problems. It is important apply modern principles problems, but novelty principle should not preclude nature problem be solved. For example,...
More than 300 coots ( Fulica americana ) became frozen in Spring Lake, Tazewell County, Illinois, on December 1, 1985. This catastrophic event permitted 8 weeks of taphonomic observations, which showed that ice forms a stable substrate permits terrestrial processes to be imprinted lacustrine deposits. Bird and mammal scavengers attacked coot carcasses different manners, resulting distinct disarticulation sequences. preferentially fed the head, neck, breast-wing complex, causing early bones...
New records of Jefferson's ground sloth ( Megalonyx jeffersonii ) and elk-moose Cervalces scotti from Lang Farm provide the first precise temporal correlation these taxa with specific environments inhabited by them near time their extinction. Six AMS 14 C measurements establish an age 11,405 ± 50 yr B.P. for 11,430 60 or 11,485 40 . These represent youngest dates two genera based on direct dating. Comparison pollen data northern Illinois indicates that species a nonanalog environment was...