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Invasion Of A High Evaluation Burn By Engelmann Spruce, David R. Dreesen

Biology ETDs

The invasion of a high elevation burn (3500 m) by Engelmann spruce (Picea engelmannii Parry) was investigated on the Santa Fe National Forest in north-central New Mexico. Population analyses and a field germination test of spruce seeds under various treatments were performed. The resistance of soil moisture blocks and soil temperatures were measured.

The fire which occurred in 1886 eliminated a climax spruce-fir forest and resulted in a subalpine grassland at elevations above the zone where aspen (Populus tremuloides Michx.) has invaded. The estimated crown coverage of trees in the grassland is less than 5%. Engelmann spruce comprises 92.5% of …

Annotated Checklist Of Mammals Of The Yucatán Peninsula, México. Ii. Rodentia, J. Knox Jones Jr., Hugh H. Genoways, Timothy E. Lawlor

University of Nebraska State Museum: Mammalogy Papers

The Yucatán Peninsula, as encompassed in this series of papers, includes the Mexican states of Campeche and Yucatán, and the Federal Territory of Quintana Roo. This region is a low-lying plain that rises gently in elevation from north to south. It is surrounded on three sides by water and bounded on the south by British Honduras (i.e. Belize), Guatemala, and the Mexican state of Tabasco. The vegetation of the peninsula increases in height from north to south and from the coast inland. Generally, forest to the north is xerophilic, but that of the southern part of the peninsula is tall, …

Abstracts Of Papers Scheduled For Presentation At The 86th Session Of The Iowa Academy Of Science, April 19-20, 1974, Iowa Academy Of Science

Iowa Academy of Science Documents

Presentation abstracts from the annual meeting of the Iowa Academy of Science

Program: 86th Annual Session Of The Iowa Academy Of Science, April 19-20, 1974, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

A Survey Of The Herpetofauna Of The Upper Lick Fork Watershed, Rowan County, Kentucky, Ronald A. Bertram

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Ronald A. Bertram on April 3,1974.

End Matter, Vol. 19 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 19 No. 4

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 19 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Front Matter, Vol. 19 No. 3

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

South Dakota Farm And Home Research, Agricultural Experiment Station, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

Interview with the Director [p] 2
Sunflower Meal or Rapeseed Meal in Calf Rations [p] 7
Alfalfa Under Dryland and Irrigation [p] 10
Across-Slope Farming Saves Rainfall Runoff [p] 14
When Fertilizer Supply Runs Short:
Depend on Soil Testing [p] 18
Soybean Crop Will Meet its Own Nitrogen Needs [p] 20
Match Spring Wheat Variety to Available Nitrogen [p] 23
Assemble it Yourself “Farmer Helper” [p] 27
Iron in Irrigation Water [p] 28
Stretch Your Irrigation Budget [p] 29
Spraying for Alfalfa Weevil [p] 32
Problems in Moving Grain [p] 34
Pea Beans [p] 38

Effects Of Surface Sizing Agents On Bod Of Recycled Papers, Lynn Berry

Paper Engineering Senior Theses

Surface sizing agents can be major contributors to a mill's BOD loading. A 2% solids application of polyvinyl alcohol will give little or no BOD as compared to a high BOD resulting from a 8% solids application of anionic and cationic starch. The use of polyvinyl alcohol will give equivalent or better strength properties along with better sizing and high wax picks with only about one-half to three-quarters of a pound pick up per 3300 ft². High sizing values were achieved with the starches but at higher pick up levels. Polyvinyl alcohol could be best used in combination …

"The Evaluation Of Bacterial Cellulose From Acetobacter Xylinum As A Potential Papermaking Material", Thomas R. Arnson

Paper Engineering Senior Theses

Bacterial cellulose was biosynthesized by Acetobacter xylinum on an enriched growth medium of glucose, yeast extract and KH₂PO₄. The bacterial cellulose fibers were found to be about one-fourth the size of an average softwood fiber.

Pulp and paper total mill effluents and alfalfa extract were exchanged for the glucose and the yeast extract in the growth medium to see if they could substitute for these materials. Kraft and NSSC total mill effluents were found to substitute for the glucose. The alfalfa extract was found to be a better and cheaper material than the yeast extract. Acetobacter …

Social Play In Coyotes, Wolves, And Dogs, Marc Bekoff

Ethology Collection

No abstract provided.

Xiphiorhynchus Kimblalocki, A New Billfish From The Eocene Of Mississippi With Remarks On The Systematics Of Xiphioid Fishes, Harry L. Fierstine, Shelton P. Applegate

Biological Sciences

Xiphiorhynchus kimblalocki, a new species of extinct billfish from the Eocene of Mississippi, is described. This is the first record of Xiphiorhynchus outside of western Europe, and the material consists of a well-preserved rostrum, three partial vertebrae and two fin spine fragments. Xiphiorhynchus kimblalocki is compared with other living and extinct billfish and appears to be intermediate in morphology between the Xiphiidae and Istiophoridae. Various genera of fossil billfish are critically discussed and we suggest that the Blochiidae, Paleorhynchidae, and the "Cylindracanthus-group" should be placed in Xiphioidei lncertae sedis until better evidence indicates that they are billfish. …

Fractionation Of Biologically Active Nucleic Acid Extract Of Volvox Aureus, Lucy Ann Gresham

Theses & Honors Papers

The colonial flagellate Volvox has been under study recently because its pattern of differentiation is simple and because it synthesizes chemical substances that induce or influence specific stages in its development (Darden, 1970; Starr , 1970). Volvox shows cellular differentiation and division of labor but has a maximum of four cell types, making Volvox's cellular diversity among the least complex of multicellular organisms . Chemical induction systems for males, females, and parthenospores are known for several species.

Male differentiation in Volvox aureus M5 is controlled by a male inducing substance (MIS) obtained from filtrates of sexual cultures (Darden, 1966). MIS …

Agricultural Experiment Station News April 1974

Agricultural Research Division: News and Annual Reports

CONTENTS:
THE INSTITUTE OF AGRICULTURE AND NATURAL RESOURCES
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - March 1974
BULLETINS PRINTED

South Dakota Farm And Home Research, Agricultural Experiment Station, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

An Interview with the Dean [p] 3
Trickle Irrigation [p] 8
Oats: Your Protein Source [p] 11
Replacement Beef Heifers [p] 14
One-Stop Irrigation Center [p] 17
Spraying for Wheat Rust [p] 21
Flax: Breaking the Yield Barrier [p] 23
Away from “Real Trouble” [p] 26
Garrison Creeping Meadow Foxtail [p] 30
A Bromegrass that Doesn’t Quit [p] 34
Silage from High-Sugar Corn [p] 36

A Comparison Of Meteorologic Measurements From Irrigated And Non-Irrigated Plots, Provo, Ut, 1970–1972, Ferron L. Andersen, Phil D. Wright, J. Carl Fox

Brigham Young University Science Bulletin, Biological Series

A comparative study of micrometeorologic conditions on irrigated and non-irrigated pasture plots was conducted at Provo, Utah, from 1970 to 1972. Daily measurements were taken of the following: precipitation cither as rain or snow, new snowfall and total snow depth during the winter; relative humidity in a standard weather shelter; number of hours at maximum relative humidity; cloud cover each morning; potential evaporation; total wind 1 m above ground level; temperature extremes in a standard weather shelter; and temperatures both on irrigated and non-irrigated plots with sensing devices located 5 cm beneath soil surface under grass cover, at soil surface …

A Taxonomic Study Of The Western Collared Lizards, Crotaphytus Collaris And Crotaphytus Insularis, Nathan M. Smith, Wilmer W. Tanner

Brigham Young University Science Bulletin, Biological Series

The heterogeneous nature of the collared lizards west of the Colorado River prompted this study. Samples from known populations of C. c. auriceps, C. c. baileyi, and C. c. fruscus were used as a base for defining the western populations. External morphology and cranial morphology were compared by cluster, canonical, and discriminant analyses.

Results of these analyses show a western complex of four populations which are distinct from the three base populations of the collaris complex. Members within the western complex are distinguishable with at least 90 percent reliability by discriminant analysis. Because of intergradation patterns seen in western Sonora, …

The Use Of Color Infrared Aerial Photography In Determining Salt Marsh Vegetation And Delimiting Man-Made Structures Of Lynnhaven Bay, Virginia, Robert E. Holman Lll

Biological Sciences Theses & Dissertations

Color infrared aerial photography was found to be superior to color aerial photography in an ecological study of Lynnhaven Bay, Virginia. The research was divided into three phases: 1) determination of the feasibility of correlating color infrared aerial photography with wetland species composition and zonation patterns, 2) determination of the accuracy of the aerial interpretation and problems related to the aerial method used, and 3) comparison of developed with undeveloped areas along Lynnhaven Bay's shoreline.

Wetland species composition and zonation patterns of major cones were correlated with aerial infrared photography and resulted in a high degree of accuracy. Problems with …

A Taxonomic Study Of Members Of The Family Entrobacteriaceae With Gas Chromatography, Madeline Ducate

Biological Sciences Theses & Dissertations

Abstract unavailable.

The Ecology Of The Dominant Tick Species In The Northwestern Portion Of The Dismal Swamp National Wildlife Refuge, Mary Keith Garrett

Biological Sciences Theses & Dissertations

Elements of the ecology of the two dominant man-biting ticks were studied during 1971-1973 in two locations in Southeastern Virginia, namely, what is now the Dismal Swamp National Wildlife Refuge and Newport News City Park. Tick species composition, relative abundance, density, and distribution in the two areas were compared. In addition, the Dismal Swamp locality was used as a test area for studies on the survival of native, lab reared and translocated Dermacentor variabilis (Say) and Amblvomma americanum (L.) in relation to selected abiotic factors. The Newport News locality served as a control area for these studies.

The species …

Seasonal Composition Of Zooplankton In The Lafayette River, Norfolk, Virginia, Dahn E. Crandall

Biological Sciences Theses & Dissertations

Abstract unavailable.

An Ecological Study Of The Craney Island Disposal Area In Hampton Roads, Virginia, David Wallace Laist

Biological Sciences Theses & Dissertations

A one year ecological study was conducted on the Craney Island Disposal Area in Hampton Roads, Virginia. This study attempted to identify the flora and fauna inhabiting the spoil deposits and trace the development of communities from the time of deposition through the initial stages of succession.

One hundred and ninety-two species were identified including 48 vascular plants, 66 insects, 48 birds, 18 species of algae, 4 crustaceans, and 8 vertebrates. The study area was divided into six zones based on substrate characteristics and species composition. The successional patterns and biotic interactions within each zone were discussed.

Observations On The Distribution And Composition Of Zooplankton In Portions Of The Intracoastal Waterway, Virginia, O. Clair Hillard Jr.

Biological Sciences Theses & Dissertations

Five stations were established in the Southern Branch of the Elizabeth River, the Dismal Swamp Canal, the Albemarle and Chesapeake Canal and the North Landing River. Representative samples of zooplankton were taken from October 1971 to June 1972. A. total of 57 species were identified and discussions regarding seasonal distribution in relation to physical factors and circulation are presented.

The composition of the zooplankton was found to fluctuate greatly due to the variables characteristic of the study area. The combined effect of tidal flow with freshwater input in conjunction with drainage from the Great Dismal Swamp, results in isolated populations …

Studies On The Causes Of Tree Distribution In A Forest Type In The Dismal Swamp National Wildlife Refuge, Thomas A. Janszen

Biological Sciences Theses & Dissertations

Vegetational composition and environmental parameters were analyzed in a forest type of the Dismal Swamp. A 0.5 ha forest stand was divided into 200 5 x 5 meter contiguous quadrats and the tree size classes were precisely mapped. Fifty soil samples were analyzed for texture, pH, and major nutrients. A topographic map was constructed with precision to 0.01 ft. Analysis of variance tests showed non-randomness to exist in soil texture and nutrient content while homogeneity tests showed non-randomness in distribution of some woody species. Factor analysis indicated no significant correlations between soil quality, topography, and woody species. Findings indicate that …

Virus-Associated Tumours Of The Harderian Gland In Laboratory-Reared Voles, Clethrionomys Rutilis (Pallas), Robert L. Rausch, J. W. Lindsay

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Tumors of the Harderian gland occurred frequently in red-backed voles, Clethrionomys rutilus (Pallas), in a captive colony maintained since 1957. Although the tumors became obvious only in animals about a year old and older, early stage changes were histologically evident in glands from younger, clinically normal voles. The tumors ranged in type from poorly differentiated adenoma to adenocarcinoma, with invasion of adjacent tissues and characteristic deformation of the zygomata. Electron micrographs disclosed viral particles in the cytoplasm of glands from clinically normal animals as well as in glands showing malignant changes. The tumor was not observed in arvicoline rodents of …

More Information On The Coccidian Parasites (Protozoa: Eimeriidae) Of The Colorado Pika, Ochotona Princeps, With A Key To The Species, Donald W. Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The prevalence of 7 species of Coccidia is reported from 137 Colorado pikas, Ochotona princeps, collected on Mt. Evans, Clear Creek County, Colorado, during the summers of 1968, 1969, and 1971. Identification of the parasites was based on the structure of the unsporulated oocysts which, at least for those species that have been described to date from North American pika hosts, are highly distinctive for most species. Photographs illustrate the differences in size, shape, and form of the oocysts of the various species. A key to the Coccidia of pikas, based on the descriptions of sporulated oocysts, is presented.

Studies On The Membrane Associated L-Malate Dehydrogenase-Oxidase Complex Of Micrococcus Lysodeikticus, Jerry James Johnson

Masters Theses

No abstract provided.

A Study Of The Influence Of Serum Thyroxine On The Annual Reproductive Cycle Of The Adult Female Mallard, Deward L. Walker

Masters Theses

No abstract provided.