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Articles 14521 - 14550 of 14813
Full-Text Articles in Earth Sciences
A New Species Of Menoceras From The Marsland Formation Of Nebraska, Lloyd G. Tanner
A New Species Of Menoceras From The Marsland Formation Of Nebraska, Lloyd G. Tanner
Bulletin of the University of Nebraska State Museum (1924–2023)
Further study indicates that the Menoceras remains collected from the "Bridgeport Quarries" (lower port:on or the Marsland Formation, Middle Miocene, of the Hemingford Group) are of a new species.
In 1962, these dicerathere remains were considered to be a geologic variety of Diceratherium niobrarensis (Stecher, Schultz, and Tanner). However, later (Tanner, 1969) a generic distinction was revived, separating the Menoceras Troxell from Diceratherium Marsh. Diceretherium niobrarensis was then placed in synonymy with Menoceras arikarense (Barbour).
The new species is an intermediate between Menoceras arikarense (Barbour) from the Harrison Formation and Menoceras marslandensis Tanner, from the upper portion of the Marsland …
Two Lynx-Like Cats From The Pliocene And Pleistocene, C. Bertrand Schultz, Larry D. Martin
Two Lynx-Like Cats From The Pliocene And Pleistocene, C. Bertrand Schultz, Larry D. Martin
Bulletin of the University of Nebraska State Museum (1924–2023)
A new species (Lynx stouti) of small felid is described from the lower Pliocene of Colorado. This form has several characters in common with the modern Lynx and may be ancestral to that genus. A new subspecies of Lynx issiodorensis Croizet and Jobert is described as L. i. kurteni from the Mullen Assemblage, Cherry County, Nebraska. The relationships of this form to other lynxes are discussed along with the paleo-distribution of the genus.
The classification of the felinae has always been somewhat controversial, especially at the generic level. One fairly homogenous group of cats which has been separated …
Phyletic Trends In Certain Lineages Of Quaternary Mammals, C. Bertrand Schultz, Lloyd G. Tanner, Lary D. Martin
Phyletic Trends In Certain Lineages Of Quaternary Mammals, C. Bertrand Schultz, Lloyd G. Tanner, Lary D. Martin
Bulletin of the University of Nebraska State Museum (1924–2023)
Evolutionary trends in certain carnivores, rodents, bovids, and proboscideans are examined. Chronoclines are demonstrated for muskrats, beavers, mammoths, and bison. The Pliocene-Pleistocene boundary and Quaternary climatic fluctuations are also discussed.
The University of Nebraska State Museum contains a large stratigraphically controlled collection of Pleistocene animals. This collection provides a unique opportunity for the study of phyletic trends in certain lineages of mammals. Although a few phylogenetic lineages have been proposed (Schultz and Frankforter, 1946; Hibbard, et al., 1965), this has not been done for the vast majority of Pleistocene mammals. However, there is much more data available than this would …
Model For Estimating Soil Water Flow, Water Content, Evapotranspiration And Root Extraction, Musa N. Nimah
Model For Estimating Soil Water Flow, Water Content, Evapotranspiration And Root Extraction, Musa N. Nimah
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
A mathematical model was developed to predict water content profiles, evapotranspiration, water flow from or to the water table, root extraction and root water potential at the surface as functions of time under unsteady state conditions.
The model was tested in the field at The Hullinger Farm near Vernal, Utah, in 1970 and 1971. Comparison of water content-depth profiles show excellent agreement at the end of a 9- day run in 1970 on oats seeded to alfalfa. In 1971 with alfalfa as the crop, the data show best agreement, between predicted and computed water content-depth profiles, 48 hours after any …
The Microtine Rodents Of The Mullen Assemblage From The Pleistocene Of North Central Nebraska, Larry D. Martin
The Microtine Rodents Of The Mullen Assemblage From The Pleistocene Of North Central Nebraska, Larry D. Martin
Bulletin of the University of Nebraska State Museum (1924–2023)
The University of Nebraska State Museum has had an active collecting program in Hooker and Cherry counties, Nebraska, since the 1930's. The following University of Nebraska State Museum collecting localities have been extensively excavated: Cr-10, Cr-102, Cr-11, Ho-101, Ho-102, and Ho-103. These localities have produced a large vertebrate fauna described by Jakway as the Mullen Local Fauna which he considered for the most part to be Early lllinoian. Further study of this local fauna now demonstrates that assemblage does include Early as well as Middle Pleistocene animals. The purpose of this paper is to report on the evidence regarding the …
Methodological And Validation Study Of Seed Reserves In Desert Soils, David W. Goodall, Stuart Childs, Herman Wiebe
Methodological And Validation Study Of Seed Reserves In Desert Soils, David W. Goodall, Stuart Childs, Herman Wiebe
Memorandum
The development of a method for separating seeds from desert soils, and enumerating them, is described.
In the Great Basin desert, species differed greatly in their depth distribution, some having a peak at or just below the surface, while others were still abundant below 5 cm. Much higher seed densities were found beneath the canopies of shrubs and of tussock grasses than in the inter-spaces; no consistent differences were found, however, associated with the species of the canopy plant, or with distance from its center.
Tentative estimates are given of the seed population in the four validation sites in Curlew …
Standing Crop And Productivity Of Marsh Vegetation At Saratoga Springs, California, W. G. Bradley
Standing Crop And Productivity Of Marsh Vegetation At Saratoga Springs, California, W. G. Bradley
Memorandum
No abstract provided.
Application Of Remote Sensing Techniques For Analysis Of Desert Biome Validation Studies, Paul T. Tueller, Garwin Lorain
Application Of Remote Sensing Techniques For Analysis Of Desert Biome Validation Studies, Paul T. Tueller, Garwin Lorain
Memorandum
No abstract provided.
Seasonal Use Of Soil Moisture By Mature Velvet Mesquite, Dwight R. Cable
Seasonal Use Of Soil Moisture By Mature Velvet Mesquite, Dwight R. Cable
Memorandum
No abstract provided.
Ingestion Rates, Live Weight Caloric Densities And Standing Crop Estimates For Desert Biome Rodents, R. K. Schreiber, D. R. Johnson
Ingestion Rates, Live Weight Caloric Densities And Standing Crop Estimates For Desert Biome Rodents, R. K. Schreiber, D. R. Johnson
Memorandum
No abstract provided.
Life History And Life Process Studies Of The Water Scavenger Beetle, Hydrophilus Triangularie Say, M. D. Hallmark, C. R. Ward
Life History And Life Process Studies Of The Water Scavenger Beetle, Hydrophilus Triangularie Say, M. D. Hallmark, C. R. Ward
Memorandum
No abstract provided.
Demography And Role Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation, Soil And Climate Variables, W. G. Whiteford, G. Ettershank
Demography And Role Of Herbivorous Ants In A Desert Ecosystem As Functions Of Vegetation, Soil And Climate Variables, W. G. Whiteford, G. Ettershank
Memorandum
No abstract provided.
Radiative Environment And The Surface Temperature On A Microscale In A Sagebrush Biome, Inge Dirmhirn
Radiative Environment And The Surface Temperature On A Microscale In A Sagebrush Biome, Inge Dirmhirn
Memorandum
No abstract provided.
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westerman
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T. C. Tucker, R. L. Westerman
Memorandum
No abstract provided.
Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, Raymond I. Lynn, Roy E. Cameron
Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, Raymond I. Lynn, Roy E. Cameron
Memorandum
No abstract provided.
Assimilation, Metabolism And Growth Of Utah Chub, Gila Artaria, F. C. Cheng, R. L. Wallace, T. C. Bjornn, C. Macphee
Assimilation, Metabolism And Growth Of Utah Chub, Gila Artaria, F. C. Cheng, R. L. Wallace, T. C. Bjornn, C. Macphee
Memorandum
No abstract provided.
Validation Studies And Bacterial Mineralization Of Organic Carbon At Locomotive Springs, J. Anne Holman, F. W. Post, I. Walkiw
Validation Studies And Bacterial Mineralization Of Organic Carbon At Locomotive Springs, J. Anne Holman, F. W. Post, I. Walkiw
Memorandum
No abstract provided.
Curlew Valley Validation Site Report, David F. Balph
Tucson Validation Sites Report, John L. Thames
Rock Valley Validation Site Report, Frederick B. Turner
Rock Valley Validation Site Report, Frederick B. Turner
Memorandum
No abstract provided.
Gas Exchange And Productivity For Opuntia Spp., I. P. Ting, H. B. Johnson, S. R. Szarek, G. D. Brum
Gas Exchange And Productivity For Opuntia Spp., I. P. Ting, H. B. Johnson, S. R. Szarek, G. D. Brum
Memorandum
No abstract provided.
Productivity And Water Stress In Cacti, Duncan T. Patten
Productivity And Water Stress In Cacti, Duncan T. Patten
Memorandum
No abstract provided.
Rate Of Transport Of Photosynthate To Root Systems Of Desert Shrubs, A. Wallace, S. Bamberg
Rate Of Transport Of Photosynthate To Root Systems Of Desert Shrubs, A. Wallace, S. Bamberg
Memorandum
No abstract provided.
Biomass And Nutrient Dynamics Of Some Major Cold Desert Shrubs, Neil E. West
Biomass And Nutrient Dynamics Of Some Major Cold Desert Shrubs, Neil E. West
Memorandum
No abstract provided.
Water Balance Techniques I. Sampling Soil Moisture Changes Ii. Channel Transmission Losses, T. Sammis, H. Qashu, J. Ryan, J. Thames
Water Balance Techniques I. Sampling Soil Moisture Changes Ii. Channel Transmission Losses, T. Sammis, H. Qashu, J. Ryan, J. Thames
Memorandum
No abstract provided.
Biology Of Nematodes In Desert Ecosystems, R. Mankau, S. A. Sher
Biology Of Nematodes In Desert Ecosystems, R. Mankau, S. A. Sher
Memorandum
No abstract provided.
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals, G. L. Bender, J. Macmahon, S. Szerlip
Development Of Techniques For Estimating Biomass Of Desert Inhabiting Invertebrate Animals, G. L. Bender, J. Macmahon, S. Szerlip
Memorandum
No abstract provided.
Evaluation Of Trap Stimulus In Relation To Probability Of Rodent Capture, D. F. Balph, R. D. Anderson
Evaluation Of Trap Stimulus In Relation To Probability Of Rodent Capture, D. F. Balph, R. D. Anderson
Memorandum
No abstract provided.
Evaluation Of Techniques For Estimating Population Sizes Of Desert Rodents, C. D. Jorgensen, H. D. Smith, D. T. Scott
Evaluation Of Techniques For Estimating Population Sizes Of Desert Rodents, C. D. Jorgensen, H. D. Smith, D. T. Scott
Memorandum
No abstract provided.
Diets, Food Preferences, And Reproductive Cycles Of Some Desert Rodents, R. P. Balda, G. C. Bateman, T. A. Vaughan
Diets, Food Preferences, And Reproductive Cycles Of Some Desert Rodents, R. P. Balda, G. C. Bateman, T. A. Vaughan
Memorandum
No abstract provided.