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The Functional Relationships Among The Organisms Comprising Detritus-Based Foodchains At The Rock Valley Site, J. F. Mcbrayer, G. E. Mamolito, P. J. Franco

Memorandum

No abstract provided.

Studies On Wood Borers, Girdlers And Seed Predators Of Mesquite, W. G. Whitford, R. K. Johnson, D. J. Depree

Memorandum

No abstract provided.

Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, A. K. Temte

Memorandum

No abstract provided.

Classification And Quantification Of Invertebrate Activity And The Role Of Invertebrates In Nitrogen Processing In Plants, Litter And Soil In Curlew Valley, P. R. Sferra

Memorandum

No abstract provided.

Nitrogen Retention In Cool Desert Soils, J. Skujins

Memorandum

No abstract provided.

Nitrogen Dynamics In Stands Dominated By Some Major Cool Desert Shrubs Iv. Inhibition By Plant Litter And Limiting Factors Of Several Processes, J. Skujins

Memorandum

No abstract provided.

Prediction Of Plant-, Soil- And Air-Temperature On A Microscale In The Desert, L. R. Martinez, I. Dirmhirn

Memorandum

No abstract provided.

Effect Of Soil Water Potential On Soil Moisture Absorption, Transpiration Rate, Plant Water Potential And Growth For Artemisia Tridentata, G. S. Campbell, G. S. Harris

Memorandum

No abstract provided.

Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, W. A. Jury, L. H. Stolzy, J. Letey Jr., L. V. Weeks

Memorandum

No abstract provided.

Middle And Late Cenozoic Tapirs From Nebraska, C. Bertrand Schultz, Larry D. Martin, R. George Corner

Bulletin of the University of Nebraska State Museum (1924–2023)

The distribution and evolution of Late Cenozoic tapirs are discussed and the forms present in Nebraska are reported. Two new species are described from the Ogallala Pliocene of Nebraska, ?Tapirus johnsoni and ?T. simpsoni. Tapirs are known in Nebraska from the Early Oligocene through the Middle Pleistocene. The northern limit of the distribution of the tapirs contracts gradually southward in North America throughout the Tertiary, and even during the Pleistocene interglacials Nebraska must have been near the northern limit of their range.

Stratigraphic Occurrences Of Teleoceras With A New Kimballianspecies From Nebraska, Lloyd G. Tanner

Bulletin of the University of Nebraska State Museum (1924–2023)

Study of Teleoceras remains in the University of Nebraska State Museum indicates that this specialized, short-limbed rhinoceros inhabited the Central Great Plains from Early through Late Pliocene. Previously thought to have become extinct at the end of the middle Pliocene, this genus is now known from the very latest Pliocene. A new species, Teleoceras schultzi, is described from the Kimball Formation, Ogallala Group, Frontier County, Nebraska.

Rates Of Water Entry Into The Subsoil Of Several Soil Series In Nebraska, David T. Lewis

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Rates of water entry were measured for 11 soil series representing many of the soils in parts of Nebraska where urban growth is most intensive. The wetting procedure in making the tests is critical and a 24 hour wetting time as usually recommended is not adequate for all soils if the percolation test is made during a dry season. Rates of water entry differed among soils even though a large amount of variation was evident within the same soil series. Statistical analysis showed a highly significant negative relationship between both clay content and bulk density and rates of water entry. …

1975 Trials On Doublegee, D J. Gilbey

Experimental Summaries - Plant Research

75A16, 75A17, 75C13, 75MO36, 75MO37, 75WH21, 75WH22. Biological control of doublegee.

The Keller Plan In College Introductory Physical Geology : A Comparison With The Conventional Teaching Method, Robert G. Walsh Sr.

Theses and Dissertations

The purpose of this study is to compare the learning and attitudinal changes that took place in a college introductory physical geology class between a self-paced method of instruction called the Keller Plan and the conventional lecture-laboratory method.

The sample population was 56 students enrolled in Earth Science 120, an introductory physical geology course at Minot State College ·~ during the fall quarter, 1973. An experimental section of 20 students experienced the Keller Plan treatment and two control groups consisting of 18 students each received the conventional method of instruction.

Four specific areas of investigation were tested: (1) knowledge of …

Natural Science Of The Great Plains As It Relates To The American Indian : A Syllabus And Sourcebook, Mary E. Bluemle

Theses and Dissertations

This dissertation, which includes a sourcebook of pertinent reference materials, sample lesson plans, and natural science roadlogs, is an initial attempt at providing an Indian Studies field course in natural science. It also includes a syllabus which stresses natural science processes and serves as a unifying factor for field work, lecture, and course discussions. The dissertation stresses geographical and ecological concepts, climatic and geological processes, and the natural habitats of North Dakota. It includes discussions of North Dakota vertebrates and early man and his relation to his environment; discussions of_ the geologic features, geologic history, vegetation and animal life of …

Classification Of Surficial Materials, James Hadley Williams

Doctoral Dissertations

"A surficial materials classification system has been designed to fit the needs of a geologist in mapping and classifying surficial materials. The system developed in this study is intended primarily for analysis of surficial materials where time-stratigraphic markers are not applicable or recognized. Primary classification is based on fabric and mode of origin supplemented by data on engineering and pedologic properties.

Several types of classification systems presently exist for use in soil investigations. Only three of these systems have found widespread acceptance, two serving the engineering profession and the other the needs of the soil scientist. These systems are not …

Versuche Zur Erfassung Der Vertikalen Verteilung Von Organismen Und Chemischen Substanzen Im Grundwasser Von Talauen Und Terrassen; Methoden Und Erste Befunde, Siegfried Husmann

International Journal of Speleology

In the alluvial ground of the river Fulda valley and in the diluvial terrace of the river Weser assortments of tubes of various lengths were sunk into sandy and gravely underground to bring to light groundwater of different depths. The installation of these groundwater pump stations was effectuated by two different methods: 1. with the aid of an apparatus for bringing down bore-holes, 2. by ramming in the pump tubes with the aid of a pneumatic hammer. The first biological and chemical investigations in these subterranean water research stations indicated that the vertical distribution of groundwater organisms and chemical substances …

Un Parajapygidé Inédit Des Plages De La Côte Caraïbe De Cuba Récolté Par Mr. L. Botosaneanu Au Cours De La Seconde Expédition Biospéléologique Cubano-Roumaine À Cuba En 1973, J. Pages

International Journal of Speleology

P. (P.) botosaneanui n.sp. has been collected in the interstitial habitat of the Caribbean shores on the eastern coast of Cuba. This note is divided into 6 parts: 1) the description by L. Botusaneanu of the stations where this species has been collected and data on the possibility for the specimens of this taxa to swim and to creep between the grains of sand; 2) the description and the affinities of the n. sp., which is closely related to bonetianus Silv. from Mexico; 3) the study of the male genitalia made possible the definition of 4 instars (male 1 to …

Stenasellus Kenyensis N.Sp., Crustacea Isopoda Asellota Des Eaux Souterraines Du Kénya, Guy Magniez

International Journal of Speleology

Description of the first cavernicolous Stenasellid discovered in Kenya. St. kenyensis n.sp. is related to Somalian and Eurasiatic species of the genus.

Contribution Á L'Étude Des Zonitidae (Gastropoda) Cavernicoles Et Endogés De Roumanie, Alexandrina Negrea

International Journal of Speleology

This paper is a contribution to the study of the species of cavernicolous and endogean Zonitidae from Romania. For each of the 24 species belonging to 6 genera we present the geographical distribution, their relation to the country’s territory and data concerning the morphological characteristics, the genital apparatus included. The paper ends with a short faunistic, zoogeographical and ecological analysis.

Symposium On Life Histories Of Cave Beetles: An Introduction, Thomas L. Poulson

International Journal of Speleology

Overview of the six papers presented at the Symposium on Life Histories of Cave Beetles held at the 1973 annual convention of the National Speleological Society at Bloomington in Indiana (USA).

The Life Cycle Of A Kentucky Cave Beetle, Ptomaphagus Hirtus, (Coleoptera; Leiodidae; Catopinae), Stewart B. Peck

International Journal of Speleology

Ptomaphagus hirtus has been successfully kept in laboratory culture at 12.5°C with food in surplus at all times. Eggs hatched in 18.5 days. Three larval instars were present, which had a total larval life span of 42 days. The pupal stage lasted 32 days. Adult males and adult females had average life spans of 2.2 years and 1.6 years respectively. Maximum adult longevity was 4.2 years. Females reached reproductive maturity a month after eclosion, young and old females produced one egg every 3.5 and 3.8 days respectively, and were reproductively active for as long as 2.5 years. Compared to European …

A Population Study Of The Cave Beetle Ptomaphagus Loedingi (Coleoptera; Leiodidae; Catopinae), Stewart B. Peck

International Journal of Speleology

Baited pitfall traps were used in Barclay Cave, Alabama, in 1965 to study a blind Ptomaphagus beetle population. A 40m² area in the cave yielded 95% of the 897 adult and larval beetles trapped in the cave at 9 stations. This represented a population density of about 13 beetles/m². Tests of different baits showed decayed meat to be the most attractive. Adults were most abundant in mid-August when substrate conditions were moist, were reproductively active, and were not newly emerged from pupal cells. Larvae were most abundant in late August. The population was studied by mark-recapture methods …

Studies On The Niche Separation In Two Carabid Cave Beetles, Tom Mckinney

International Journal of Speleology

Population, habitat and behavioural studies carried out on Pseudanophthalmus menetriesi and P. pubescens in the south central Kentucky karst area are described and discussed. Differences which exist in the timing of population recruitment, habitat preference, habitat niche breadth and in the degree of agression are all important in lessening competition between these two species.

The Ecology Of A Predaceous Troglobitic Beetle, Neaphaenops Tellkampfii (Coleoptera: Carabidae, Trechinae) I. Seasonality Of Food Input And Early Life History Stages, Thomas C. Kane, Russell M. Norton, Thomas L. Poulson

International Journal of Speleology

The adaptations in the life history of the Carabid beetle Neaphaenops tellkampfii has been investigated in respect to seasonal food input. The following characters have been studied: copulations, egg production, larvae and pupae.

Seasonal Changes In A Population Of Pseudanopthalmus Tenuis (Coleoptera, Carabidae) In Murray Spring Cave, Indiana: A Preliminary Report, James H. Keith

International Journal of Speleology

A study of a population of Pseudanophthalmus tenuis is being conducted in Murray Spring Cave, Orange County, Indiana as one facet of a larger research project encompassing the entire terrestrial community of that cave. Changes in behaviour and abundance determined by census and mark-recapture methods and physiological changes determined from field-collected beetles indicates that these animals exhibit a seasonal reproductive rhythm probably mediated or controlled by winter and spring flooding of the cave.

Distribution Of Indiana Cavernicolous Crayfishes And Their Ecto-Commensal Ostracods, H. H. Hobbs Iii

International Journal of Speleology

Six species and subspecies of crayfishes and four species of entocytherid ostracods are known to inhabit the subterranean streams of southern Indiana. Cambarus (E.) Iaevis (troglophile) appears to be the most widely distributed crayfish and occurs in both karst areas within the State. The troglobite, Orconectes inermis (2 subspecies), is restricted to the larger karst area in solution cavities of Mississippian carbonate rocks. The remaining crayfishes, Orconectes immunis, Orconectes propinquus and Orconectes sloanii, are not common inhabitants of cave waters and are probably trogloxenes. All of the crayfishes except O. sloanii were found to host at least one …

Interaction Between Competition And Predation In Cave Stream Communities, David C. Culver

International Journal of Speleology

Predation by salamander larvae (Gyrinophilus porphyriticus) reduces the density of one of its prey (the isopod Asellus recurvatus) but increases the density of the other (the amphipod Crangonyx antennatus in a Virginia cave stream. This happens because predation on the isopod reduces its competitive effect on the amphipod. Both prey populations tend to occur more frequently in refugia when predators are present. In another cave where there are no prey refugia, the predator reduces the density of both species. It appears that it is easier for a predator to invade a community than to reach a stable …

Observations Sur La Biologie De Stenasellus Virei (Crustacea Isopoda Asellota Des Caux Souterraines), Guy Magniez

International Journal of Speleology

St. virei has been bred in the laboratory for many years (1960-1974). Most of the St.v.hussoni were captured in karstic waters, near the Moulis subterranean laboratory. Some St.v.virei from the Padirac sink-hole; St.v.buchneri from Cantabrian caves; St.v.boui and St.v.virei from phreatic waters; and St.buili and St.breuili have also been bred. Since Stenasellids are unable to swim, very low aquariums are used, with a bed of cave clay, some calcareous stones, dead wood and dead elm tree leaves. Little depth of water is necessary. Stenasellus was originally carnivorous, being able to capture and devour living prey, such as Chironomid larvae, but …

Three New Troglobitic Asellids From Western North America (Crustaces: Isopoda: Asellidae), Thomas E. Bowman

International Journal of Speleology

Fleming’s arguments (1973) for reducing Conasellus to a synonym of Asellus are considered inadequate, but the name Conasellus is replaced by its senior synonym Caecidotea. Two new troglobitic species of Caecidotea are described, C. chiapas from caves in Chiapas, Mexico, and C. sequoiae from Liburn Cave, Tulare County, California. Asellus califomicus is reported from springs in Napa and Santa Clara Counties; the male pleopod 2 is redescribed, and the species is assigned to the subgenus Phreatoasellus. A new genus and species, Salmasellus steganothrix, is described from Horseshoe Lake, Alberta, Canada.