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Articles 571 - 600 of 626
Full-Text Articles in Entire DC Network
The Prairie Naturalist Volume 1, No.4. December 1969
The Prairie Naturalist Volume 1, No.4. December 1969
The Prairie Naturalist
EDITORIAL: Restoring Beauty to the Human Environment ▪ Paul B. Kannowski
A REQUIEM FOR THE PRAIRIE ▪ Hugh H. Iltis
BIRDING IN MY BACK YARD ▪ Mrs. George A. Anderson
OCCURRENCE OF THE CECROPIA AND ROCKY MOUNTAIN SILK MOTHS IN SOUTHWESTERN NORTH DAKOTA ▪ James Oberfoell
The Prairie Naturalist Volume 1, No. 3. September, 1969
The Prairie Naturalist Volume 1, No. 3. September, 1969
The Prairie Naturalist
EDITORIAL: A VOICE FOR CONSERVATION ▪ Paul B. Kannowski
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1968 ▪ Robert N. Randall
SOME ENVIRONMENTAL MANAGEMENT PROBLEMS AND PROPOSED SOLUTIONS ▪ Laurence R. Jahn
SOME PLANTS OF WESTERN MINNESOTA ▪ O. A. Stevens
MORTALITY OF MIGRATORY BIRDS AT GRAND FORKS, NORTH DAKOTA FOLLOWING A MOSQUITO CONTROL OPERATION IN MAY, 1969 ▪ Robert W. Seabloom, Lewis W. Oring and James R. Reilly
NESTING OF THE UPLAND PLOVER ON THE MISSOURI COTEAU ▪ K. F. Higgins, H. F. Duebbert and R. B. Oetting
NOTE
Albino sparrows discovered at Hazen, North Dakota ▪ Larry L. Kruckenberg and …
Thrips Of The Sagebrush-Grass Range Community In West-Central Utah, Ward Max Tingey
Thrips Of The Sagebrush-Grass Range Community In West-Central Utah, Ward Max Tingey
Theses and Dissertations
Three predominant and economically important shrubs of the sagebrush-grass range community in Utah, namely big sagebrush (Artemisia tridentata Nutt.), rubber rabbitbrush (Chrysothamnus nauseosus (Pall.) Britt.), antelope bitterbrush (Purshia tridentata (Pursh) DC), and a widely re-seeded range grass, crested wheatgrass (Agropyron cristatum (L.) Gaertn.) were sampled during the summers of 1966 and 1967, and yielded twenty species of thrips. Three species (Anaphothrips tricolor Moulton, Chirothrips aculeatus Bagnall, Chirothrips simplex Hood) were new distributional records for Utah. Seven species (Frankliniella n. sp. #1, Frankliniella n. sp. #2, Haplothrips n. sp., Leptothrips n. sp., Oedaleothrips n. sp., Sericothrips n. sp. #1, Sericothrips n. …
The Prairie Naturalist Volume 1, No. 2. May, 1969
The Prairie Naturalist Volume 1, No. 2. May, 1969
The Prairie Naturalist
EDITORIAL: North Dakota's Naturalist-at-Large ▪ Paul B. Kannowski
WETLAND VEGETATION OF THE TURTLE MOUNTAINS, NORTH DAKOTA ▪ Robert L. Burgess and Dennis T. Disrud
RAPID METHOD OF FILTRATION OF MARSH WATERS ▪ V. A. Adomaitis and J. A. Shoesmith
NOTES
Additional distribution records of the false map turtle and the short-horned lizard in North Dakota ▪ Dennis J. Gemmell
Summer record of the snowy owl in North Dakota ▪ Donald R. Johnson
Long-billed curlews in LaMoure County, North Dakota ▪ Gary L. Krapu
A Taxonomic And Ecological Survey Of The Algae Of Lilly Lake, Ann C. Palmer
A Taxonomic And Ecological Survey Of The Algae Of Lilly Lake, Ann C. Palmer
Theses and Dissertations
A taxonomic and ecological survey of the algae of Lilly Lake in the Uinta Mountains, Utah, was carried on from June 1967 to November 1967. The lake is a typical acid bog lake with an average pH range of 4.5 to 6.9. Extremes of pH in the alkaline range were present due to additional factors. Algae identified included 96 genera and 208 species. These were found in many different types of microenvironmental niches. The main factors which limited the algae to definite areas of the lake were pH, water temperature, light available, and type of substrate. The predominant algal genera …
An Experimental Study Of Variation Within And Between Populations Of Petrophytum Caespitosum (Nutt.) Rydb. With Emphasis On Numerical Techniques, Frank R. Drysdale
An Experimental Study Of Variation Within And Between Populations Of Petrophytum Caespitosum (Nutt.) Rydb. With Emphasis On Numerical Techniques, Frank R. Drysdale
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Nine populations of sixty-eight individuals representing the distribution of Petrophytum caespitosum (Nutt.) Rydb. (Rosaceae) in the Intermountain Region were investigated for taxonomically significant variation using numerical techniques. On the basis of 19 morphological characters 3 subspecific taxa are recognized. Two taxa are existing subspecies: P. caespitosum (Nutt.) Rydb. var. caespitosum and P. caespitosum (Nutt.) Rydb. var. elatius (S. Wats.) Tides. One new subspecies is described: P. caespitosum (Nutt.) Rydb. var. latifolium. The ecology of the species is discussed. The floral and vegetative anatomy are described. Chromosome counts of 3 populations have given n = 9. A list of herbarium …
A Biosystematic Study Of The Genus Aconitum (Ranunculaceae) In The Intermountain Region, Rex Cates
A Biosystematic Study Of The Genus Aconitum (Ranunculaceae) In The Intermountain Region, Rex Cates
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study dealt with the Intermountain aconites of which the chromosome number of n = 8 was obtained.
The bumblebees, Bombus rufocinctus Cresson, B. appositus Cresson, and B. centralis Cresson, are the major pollinators of the allogamous and autogamous aconites.
Two-dimensional thin layer chromatography of cauline leaf extracts showed that the Intermountain aconites studied here consist of one chemical group.
The overall evidence indicates that the Intermountain aconites consist of one species, Aconitum columbianum Nutt., with two varieties, variety columbianum and variety ochroleucum A. Nels.
The Prairie Naturalist Volume 1. No.1. March 1968
The Prairie Naturalist Volume 1. No.1. March 1968
The Prairie Naturalist
EDITORIAL: Another Milestone ▪ John T. Lokemoen
NESTING OF THE COMMON SNIPE IN NORTH DAKOTA ▪ Robert E. Stewart and Harold A. Kantrud
SCIENCE WRITING — A PROBLEM ▪ Soren O. Kolstoe
INSECTICIDES: A DOUBLE-EDGED SWORD ▪ Richard D. Urban
NOTES
Why I like the Badlands ▪ Wayne Hecker
White-faced ibis in McIntosh County, North Dakota ▪ Harold F. Duebbert
Cinnamon teal observations in North Dakota ▪ A. T. Klett and John T. Lokemoen
Trumpeter swan in Kidder County, North Dakota ▪ Lewis M. Cowardin and James C. Bartonek
Specimen records of greater scaup ▪ Charles W. Dane and Harold …
Snail Investigations : A Progress Report, G D. Rimes
Snail Investigations : A Progress Report, G D. Rimes
Journal of the Department of Agriculture, Western Australia, Series 4
Experimental baits and sprays have given promising control of snails in cereals and pastures in the Geraldton-Dongara districts.
The problem of harvesting infested wheat crops has been overcome by attaching a specially designed rake in front of the header ccmb to remove snails from the plants.
A Survey Of Herbaceous Vegetation In Baber Woods, Lois M. Kloker
A Survey Of Herbaceous Vegetation In Baber Woods, Lois M. Kloker
Masters Theses
No abstract provided.
A Study Of Certain Community Relationships Of Eriogonum Corymbosum Benth In Dc In The Uintah Basin, Utah, Jack D. Brotherson
A Study Of Certain Community Relationships Of Eriogonum Corymbosum Benth In Dc In The Uintah Basin, Utah, Jack D. Brotherson
Theses and Dissertations
Eriogonum corymbosum Benth. in DC is a low-growing perennial shrub which is found in many cold temperate desert shrub regions of Colorado, Utah, and Nevada.. It is a species which grows on numerous soil types and/or geological formations. Specific objectives of the investigation were to study and describe certain community relationships of ten different plant communities where E. corymbosum was found. Each community was sampled to determine the amount of ground cover, percent composition, frequency, and density of each participating species. Physical site factors viz. soil texture, total soluble salts, pH, cation exchange capacity, and amount of calcium, magnesium, potassium, …
An Ecological Study Of The Algae And Mosses Of Cascade Springs, Wasatch County, Utah, Deanna Lynn Mccoard
An Ecological Study Of The Algae And Mosses Of Cascade Springs, Wasatch County, Utah, Deanna Lynn Mccoard
Theses and Dissertations
An ecological study was conducted at Cascade Springs, Wasatch county, Utah from August 1965, to June 1967. The algae and aquatic moss species were determined and ecological information about these organisms was obtained. Physical data were also collected: bicarbonates, carbonates, free carbon dioxide, hydroxides, oxygen, pH, and temperature. The physical environment of the water was found to be very constant. Tests taken at the different study sites were consistently similar, not only during each day, but all year around. No great variation of any kind was found in the water. In contrast to the water environment, the topography of the …
Male Sphaeropthalmine Mutillid Wasps Of The Nevada Test Site, William E. Ferguson
Male Sphaeropthalmine Mutillid Wasps Of The Nevada Test Site, William E. Ferguson
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Bibliography Of Utah Botany And Wildland Conservation, Earl M. Christensen
Bibliography Of Utah Botany And Wildland Conservation, Earl M. Christensen
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Mites Of Utah Mammals, Dorald M. Allred, D Elden Beck
Mites Of Utah Mammals, Dorald M. Allred, D Elden Beck
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Siphonaptera (Fleas) Of The Nevada Test Site, D Elden Beck, Dorald M. Allred
Siphonaptera (Fleas) Of The Nevada Test Site, D Elden Beck, Dorald M. Allred
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
An Ecological Study Of Ditylenchus Dipsaci (Kuhn) Filipjev. In A Field Of Alfalfa, Shu-Ten Tseng
An Ecological Study Of Ditylenchus Dipsaci (Kuhn) Filipjev. In A Field Of Alfalfa, Shu-Ten Tseng
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Ditylenchus dipsaci (Kuhn) Filipjev. is one of the most destructive nematodes to crop plants. It attacks and damages more than 300 species of cultivated and uncultivated plants. The nematode can be differentiated into many races, each of them having a preference for a group or even a single plant species.
Alfalfa stem nematode is one of the races in this species which attacks the above ground portion of alfalfa but does not infest the roots. Larvae of this nematode may migrate from the plant tissue to soil in moist conditions. These nematodes migrate actively to nearby plants or are carried …
The Labiatae Of Arkansas, James M. Lang
The Labiatae Of Arkansas, James M. Lang
Journal of the Arkansas Academy of Science
No abstract provided.
Bulletin No. 15: The Flora Of Connecticut Arboretum, William A. Niering, Richard H. Goodwin, Sara C. Manwell
Bulletin No. 15: The Flora Of Connecticut Arboretum, William A. Niering, Richard H. Goodwin, Sara C. Manwell
Bulletins
Included annotated checklist of over 850 species and also article on vegetation of the Arboretum. 64 pp.
Summer Soil And Air Temperatures In Four Plant Communities, Paul W. Conrad
Summer Soil And Air Temperatures In Four Plant Communities, Paul W. Conrad
Theses and Dissertations
Temperature, one of the most influential factors controlling the growth and distribution of plants, was measured during a three month summer period within several stands of vegetation. The stands represented four distinct plant communities: sagebrush-grass, mountain brush, aspen, and conifer. Measurements were obtained by a sucrose inversion method which gave exponential average or effective mean temperature (eT) values. Registerants, small glass vials filled with a sucrose-buffer solution, were placed in the air 10 decimeters above the ground level and in the soil 1, 5, and 10 decimeters below the ground level. The sites were carefully described with respect to plant …
A Phytosociological Study Of Coprophilous Ascomycete And Basidiomycete Communities From Santaquin Canyon, Utah, A. Clyde Blauer
A Phytosociological Study Of Coprophilous Ascomycete And Basidiomycete Communities From Santaquin Canyon, Utah, A. Clyde Blauer
Theses and Dissertations
Numerous reports have been published on the taxonomy and distribution of the coprophilous Ascomycetes and Basidiomycetes. No known quantitative work has been done, however, on the succession and structure of the communities formed by these higher fungi. This research was undertaken to study those two phases of the ascomycete and basidiomycete communities which grow and fruit on cow dung collected from Santaquin Canyon, Utah.
A Comparative Population Study Of Small Vertebrates In The Uranium Areas Of The Upper Colorado River Basin Of Utah, Wilmer W. Tanner
A Comparative Population Study Of Small Vertebrates In The Uranium Areas Of The Upper Colorado River Basin Of Utah, Wilmer W. Tanner
Brigham Young University Science Bulletin, Biological Series
This paper constitutes a terminal report to the United States Atomic Energy Commission for contract AT(11-1)819. It provides not only a faunistic and floristic study of areas having a high and low surface radiation, but also includes a consideration of their general ecology. Major emphasis is placed on the variation of the external characteristics of the small vertebrates of these areas with a statistical analysis of those characters examined in the lizards. The study was conducted in southeastern Utah (Tanner 1963, see map) from October 1959 through 1964, and was conducted as a test of the variation effects of natural …
Mammals Of The Nevada Test Site, Clive D. Jorgensen, C. Lynn Hayward
Mammals Of The Nevada Test Site, Clive D. Jorgensen, C. Lynn Hayward
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Identification Of The Adults, Nymphs And Larvae Of Ticks Of The Genus Dermacentor Koch (Ixodidae) In The Western United States, E. P. Brinton, D E. Beck, D. M. Allred
Identification Of The Adults, Nymphs And Larvae Of Ticks Of The Genus Dermacentor Koch (Ixodidae) In The Western United States, E. P. Brinton, D E. Beck, D. M. Allred
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Tenebrionidae Beetles Of The Nevada Test Site, Vasco M. Tanner, Willis A. Packham
Tenebrionidae Beetles Of The Nevada Test Site, Vasco M. Tanner, Willis A. Packham
Brigham Young University Science Bulletin, Biological Series
The intent of this study conducted over a period of three years was to ( 1 ) provide descriptions of the species of tenebrionids found at the Nevada Test Site, (2) determine their relative abundance, (3) determine their seasonal activity, and (4) ascertain their plant community relationships.
A total of 14,650 beetles representing 46 kinds of tenebrionids was collected with sunken can traps, by hand, and ultra-violet light. Collections were made at regular intervals in the following plant communities: Larrea-Franseria, Lycium, Atriplex-Kochia, Grayia-Lycium (disturbed and undisturbed areas), Salsola, Coleogyne, Pinyon-Juniper, and Mixed.
The data obtained from this study indicate that …
Orthoptera Of The Nevada Test Site, Andrew H. Barnum
Orthoptera Of The Nevada Test Site, Andrew H. Barnum
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Arthropod Associates Of Plants At The Nevada Test Site, Dorald M. Allred, D Elden Beck
Arthropod Associates Of Plants At The Nevada Test Site, Dorald M. Allred, D Elden Beck
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Presettlement Vegetation And Vegetational Change In Three Valleys In Central Utah, Earl M. Christensen, Hyrum B. Johnson
Presettlement Vegetation And Vegetational Change In Three Valleys In Central Utah, Earl M. Christensen, Hyrum B. Johnson
Brigham Young University Science Bulletin, Biological Series
Historical information, survey records, and relict vegetation were used as sources of data for determining the nature of the presettlement vegetation of Pavant, Round, and Juab Valleys in central Utah. The foothills were covered with bunch grasses (principally Agropyron spicatum and Poa secunda), scattered junipers (Juniperus utahensis), and sagebrush (Artemisia tridentate). Western wheatgrass (Agropyron smithii) was common on level areas within the foothills. Below the foothill region on the more gentle slopes and benchlands there was a broad belt dominated by bunch grasses. The grassy area intergraded into a zone dominated by northern …
Influence Of Sodium And Calcium Chlorides In The Nutrient Solution On Secretions Of Salt Glands Of Tamarix Species, Don L. Chadwick
Influence Of Sodium And Calcium Chlorides In The Nutrient Solution On Secretions Of Salt Glands Of Tamarix Species, Don L. Chadwick
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Salt glands are an adaptation for living in saline habitats possessed by several species of plants. In the family of Plumbaginaceae at least three mangrove genera, Aegialitis, Aegiceras, and Avicennia, possess salt glands according to Scholander (1962). Salt glands of the small ornamental shrubs, Statice gmelini, and Limonium latifoluim of the same family, were studied by Ruhland (1915) and Arisz (1955). Spartina townsendii of the Graminaceae and Tamarix petandra, Tamarix hispida, and Tamarix aphylla of the Tamaricaceae families also have the glands.
Insect Pests Of Cotton In The Ord River Irrigation Area, K T. Richards
Insect Pests Of Cotton In The Ord River Irrigation Area, K T. Richards
Journal of the Department of Agriculture, Western Australia, Series 4
COTTON is grown in the Ord Valley of north Western Australia, mainly as an annual, irrigated crop during the hot summer months of the "wet season".
It is usually planted in November-December and harvested March-May.
This period of growth corresponds closely to that of maximum insect activity.