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Articles 9511 - 9540 of 10983
Full-Text Articles in Entire DC Network
T–Z, Anonymous, Stephen L. Wood, Donald E. Bright Jr.
T–Z, Anonymous, Stephen L. Wood, Donald E. Bright Jr.
Great Basin Naturalist Memoirs
No abstract provided.
I–L, Stephen L. Wood, Donald E. Bright Jr.
I–L, Stephen L. Wood, Donald E. Bright Jr.
Great Basin Naturalist Memoirs
No abstract provided.
A–D, Stephen L. Wood, Donald E. Bright Jr.
A–D, Stephen L. Wood, Donald E. Bright Jr.
Great Basin Naturalist Memoirs
No abstract provided.
Congratulatory Note, Leo Schelbert
Congratulatory Note, Leo Schelbert
Swiss American Historical Society Newsletter
On January 5, 1988, Arthur Davis Hasler, Professor Emeritus of the University of Wisconsin-Madison, will celebrate his eightieth birthday. The Swiss American Historical Society is honored to add its congratulations and best wishes to the many he will receive on that occasion not only from family, friends, and scholars in the United States, but also from distinguished scientists and admirers abroad.
The Evolution Of A Scholar And His School Of Research: "The Wisconsin Limnology Community - The Hasler Period", Frank N. Egerton
The Evolution Of A Scholar And His School Of Research: "The Wisconsin Limnology Community - The Hasler Period", Frank N. Egerton
Swiss American Historical Society Newsletter
Arthur D. Hasler was born at Lehi, Utah, on January 5, 1908. No one who knows him doubts his own strong conviction that his pioneering Mormon background provided him with ethical and intellectual values that contributed substantially to his successful career. His boyhood interests were in fishing, raising livestock, camping, nature study, and the Boy Scouts. These interests did not lead him inevitably into limnology, however. While an undergraduate at Brigham Young University he seriously considered following his father's example in becoming a physician and was only deflected from that by the financial constraints of the Depression and an ill …
A Reclassification Of The Genera Of Scolytidae (Coleoptera), Stephen L. Wood
A Reclassification Of The Genera Of Scolytidae (Coleoptera), Stephen L. Wood
Great Basin Naturalist Memoirs
A taxonomic revision of the genera of Scolytidae (Coleoptera) in the world fauna is presented. Included are 215 valid genera and 273 invalid generic and subgeneric names. The type-species for each genus-group name was examined, including the type-specimen of the type-species in those taxa where a holotype, lectotype, or neotype has been designated—with the exception of four contemporary genera, the type-series of which are lost, and six fossil genera for which no effort was made to locate the types. Taxonomic keys to the families of the Curculionoidea, and to the subfamilies, tribes, and genera of Scolytidae are presented. Descriptions and …
Pinuxylon Woolardii Sp. Nov., A New Petrified Taxon Of Pinaceae From The Miocene Basalts Of Eastern Oregon, William D. Tidwell, Lee R. Parker, Vaughn K. Folkman
Pinuxylon Woolardii Sp. Nov., A New Petrified Taxon Of Pinaceae From The Miocene Basalts Of Eastern Oregon, William D. Tidwell, Lee R. Parker, Vaughn K. Folkman
Faculty Publications
Specimens of the new species Pinuxylon wollardii have been collected from Miocene strata near Kurkee, OR. These petrified specimens are unique in that, due to weathering, individual tracheids and ray cells can be separated for detailed SEM studies. This species is characterized by its high number of ray cells; numerous rays; large resin ducts which are commonly paired; primarily uniseriate pitting, two to five (usually three) small, oval or cirular pinoid pits per crossfield; and smooth walls on its transverse (ray) tracheids. The latter character relates this species to taxa in the subgenus Haploxylon of Pinus. Pinuxylon woolardii is most …
Composition And Abundance Of Periphyton And Aquatic Insects In A Sierra Nevada, California, Stream, Harry V. Leland, Steven V. Fend, James L. Carter, Albert D. Mahood
Composition And Abundance Of Periphyton And Aquatic Insects In A Sierra Nevada, California, Stream, Harry V. Leland, Steven V. Fend, James L. Carter, Albert D. Mahood
Great Basin Naturalist
The species composition of periphyton and benthic insect communities and abundances of common taxa (>0.1% of individuals) were examined during snow-free months in Convict Creek, a permanent snowmelt- and spring-fed stream in the Sierra Nevada of California. The communities were highly diverse. The most abundant taxa in the periphyton were diatoms (Achnanthes minutissima, Cocconeis placentula lineata, Cymbella microcephala, C. sinuata, Fragilaria construens, F. crotonensis , Navicula spp., Synedra acus, and S. rumpens), except in late spring and summer when several seasonal blue-green algae (Chamaesiphon incrustans, Lyngbya spp. and Oscillatoria spp.) are at their maximum densities. …
Initial Survey Of Acetylene Reduction And Selected Microorganisms In The Feces Of 19 Species Of Mammals, C. Y. Li, Chris Maser, Harlan Fay
Initial Survey Of Acetylene Reduction And Selected Microorganisms In The Feces Of 19 Species Of Mammals, C. Y. Li, Chris Maser, Harlan Fay
Great Basin Naturalist
Nitrogen-fixing bacteria, as demonstrated by the acetylene reduction method; yeasts, and actinomycetes were found in feces of mammals collected from St. Lawrence Island, Alaska, to the North Carolina-Tennessee border. The mammals, representing four orders and 19 species, occupy a wide variety of habitats and may play an important role in dispersing microorganisms vital to the ecosystem.
Hydrology Of Bear Lake Basin And Its Impact On The Trophic State Of Bear Lake, Utah–Idaho, Vincent Lamarra, Chuck Liff, John Carter
Hydrology Of Bear Lake Basin And Its Impact On The Trophic State Of Bear Lake, Utah–Idaho, Vincent Lamarra, Chuck Liff, John Carter
Great Basin Naturalist
Bear Lake is a large, relatively pristine lake located in a graben valley. The lacustrine environment is more than 35,000 years old. Over that period of time, the Bear River intermittently flowed into Bear Lake. Approximately 10,000 to 8,000 BP, the Bear River ceased flowing directly into the lake. Between 1912 and 1924, channels were dug that diverted Bear River flows into the lake. An analysis was conducted to determine the impacts of Bear River flows upon the hydrologic and nutrient budgets of the Bear Lake ecosystem. In addition, the resulting limnological conditions were evaluated. Based upon eight years of …
Biogeographic Aspects Of Leeches, Mollusks, And Amphibians In The Intermountain Region, Peter Hovingh
Biogeographic Aspects Of Leeches, Mollusks, And Amphibians In The Intermountain Region, Peter Hovingh
Great Basin Naturalist
Some biogeographical and paleobiological aspects of leeches, mollusks, and amphibians in the Intermountain Region are reviewed. Areas of eastern Nevada and western Bonneville Basin as well as the tristate region of Nevada, Utah, and Idaho are poorly inventoried with respect to many aquatic-dependent animals. Observations of Batracobdella picta in the Wasatch Mountains and Erpobdella punctata in Tule Valley in the Bonneville Basin extends the western ranges of these leeches in the Great Basin. Life history and size of leeches varies among the study sites in the northern hemisphere. Aquatic mollusk species have diminished greatly in both prehistoric and historic times, …
Parasites Of The Woundfin Minnow, Plagopterus Argentissimus, And Other Endemic Fishes From The Virgin River, Utah, Richard A. Heckmann, James E. Deacon, Paul D. Greger
Parasites Of The Woundfin Minnow, Plagopterus Argentissimus, And Other Endemic Fishes From The Virgin River, Utah, Richard A. Heckmann, James E. Deacon, Paul D. Greger
Great Basin Naturalist
Two hundred woundfin minnows, Plagopterus argentissimus, from four sites along the Virgin River, Utah, were examined on two dates during summer 1985. The foreguts of 211 woundfin and variable numbers of other fishes from the Virgin River near Beaver Dam Wash, Arizona, and Mesquite, Nevada, were examined for cestodes on four dates throughout 1979. Seven parasites were found in P. argentissimus: Posthodiplostomum minimum (metacercariae), Diplostomum spathaceum (metacercariae), Bothriocephalus acheilognathi, Gyrodactylus sp., Lernaea cyprinacea, Trichodina sp., and Ichthyophythirius multifiliis. Fungal infections were noted on two fish during the study. Seventeen Virgin River roundtail chub, Gila robusta seminuda, were examined …
Index [And Table Of Contents] To Volume 46
Index [And Table Of Contents] To Volume 46
Great Basin Naturalist
No abstract provided.
Inventory Of Utah Crayfish With Notes On Current Distribution, James E. Johnson
Inventory Of Utah Crayfish With Notes On Current Distribution, James E. Johnson
Great Basin Naturalist
Crayfish distribution and composition in Utah are poorly documented. Based upon limited collections, the native Pacifastacus gambelii is widespread and often abundant in the Bear and Weber river drainages and is occasionally represented in smaller tributaries to the Great Salt Lake and to the Raft River. Pacifastacus leniusculus was collected from Utah County and Procambarus clarkii from Tooele County; the origin of these populations is not known. The nonnative crayfish Orconectes virilis is currently abundant in the Virgin, Price, and Duchesne river basins and the Glen Canyon, Flaming Gorge, Deer Creek, and Starvation reservoirs; it is expanding in Huntington North, …
Notes On The Birds Of Cold Spring Mountain, Northwestern Colorado, Peter O. Dunn, Ronald A. Ryder
Notes On The Birds Of Cold Spring Mountain, Northwestern Colorado, Peter O. Dunn, Ronald A. Ryder
Great Basin Naturalist
Observations are presented on 117 bird species seen in a 250-km2 area of northwestern Colorado adjacent to Utah and Wyoming. Three previously unreported species and seven status changes are listed for the Rangely, Colorado, latilong block.
Effects Of Dwarf Mistletoe On Spruce In The White Mountains, Arizona, Robert L. Mathiasen, Frank G. Hawksworth, Carleton B. Edminster
Effects Of Dwarf Mistletoe On Spruce In The White Mountains, Arizona, Robert L. Mathiasen, Frank G. Hawksworth, Carleton B. Edminster
Great Basin Naturalist
Mortality of spruce in mixed conifer stands moderately to heavily infested with western spruce dwarf mistletoe was two to five times greater than in healthy stands in the White Mountains, Arizona. Ten-year volume growth loss for heavily infected spruce trees ranged from 25% to 40%. Estimates of growth loss for spruce on a stand basis ranged from 10% to 20% in heavily infested stands. Because western spruce dwarf mistletoe is prevalent in the White Mountains and causes increased mortality and reduced growth, its control should be included in management of mixed conifer stands there.
Size, Structure, And Habitat Characteristics Of Populations Of Braya Humilis Var. Humilis (Brassicaceae): An Alpine Disjunct From Colorado, Elizabeth E. Neely, Alan T. Carpenter
Size, Structure, And Habitat Characteristics Of Populations Of Braya Humilis Var. Humilis (Brassicaceae): An Alpine Disjunct From Colorado, Elizabeth E. Neely, Alan T. Carpenter
Great Basin Naturalist
Size, structure, and habitat characteristics were studied in three populations of Braya humilis var. humilis (C. A. Meyer) Robins, in Gray & Wats. (Brassicaceae), a small, herbaceous perennial of the alpine tundra in central Colorado. There was a significant association between numbers of reproductive, juvenile, and seedling individuals and population location. Plant size within reproductive, juvenile, and seedling size classes varied significantly among three populations. Plots containing Braya had significantly lower total plant cover, a different set of dominant plant species, more rock, bare ground, and less litter than plots without Braya. Braya appears to be restricted to calcareous …
Understory Seed Rain In Harvested Pinyon-Juniper Woodlands, Richard L. Everett
Understory Seed Rain In Harvested Pinyon-Juniper Woodlands, Richard L. Everett
Great Basin Naturalist
Seed rain was collected on six paired tree harvest and undisturbed plots in singleleaf pinyon (Pinus monophylla)–Utah juniper (Juniperus osteosperma) stands. Approximately 14,600 seeds were collected during four years. Seed rain in undisturbed plots was similar to levels in mixed forest communities. Seed rain on harvest plots was similar to disturbed sites and grasslands. Seed rain levels reflect the current successional stage rather than the climax community type for the site. Seed rain increased in numbers and seed production per unit of plant cover following tree removal and especially on transition soil microsites. Only three to …
New Sclerocactus (Cactaceae) From Nevada, Ken Heil, Stanley L. Welsh
New Sclerocactus (Cactaceae) From Nevada, Ken Heil, Stanley L. Welsh
Great Basin Naturalist
Named as new is Sclerocactus schlesseri Heil & Welsh. The taxon is described and its relationships discussed.
Species Diversity And Habitat Complexity: Does Vegetation Organize Vertebrate Communites In The Great Basin?, David J. Germano, David N. Lawhead
Species Diversity And Habitat Complexity: Does Vegetation Organize Vertebrate Communites In The Great Basin?, David J. Germano, David N. Lawhead
Great Basin Naturalist
In this study, we have examined the effect of vegetation structure on the three major vertebrate taxa in Great Basin habitats of southwestern Utah. The effect of increasing vegetation heterogeneity, both horizontally and vertically, on the diversities of lizards, rodents, and postbreeding birds was investigated. We found no statistically significant relationship between diversity of all animal taxa and horizontal vegetation heterogeneity, although lizard diversity tended to decrease with increasing heterogeneity and rodent diversity tended to increase. Bird species diversity was positively correlated with vertical habitat heterogeneity. Abundances were highest for rodents in pinyon/juniper habitat and highest for lizards and birds …
Cryptogamic Soil Crusts: Recovery From Grazing Near Camp Floyd State Park, Utah, Usa, Jeffrey R. Johansen, Larry L. St. Clair
Cryptogamic Soil Crusts: Recovery From Grazing Near Camp Floyd State Park, Utah, Usa, Jeffrey R. Johansen, Larry L. St. Clair
Great Basin Naturalist
The effects of grazing on the cryptogamic and vascular plant communities at two sites near Camp Floyd State Park, Utah County, Utah, were studied. The grazed site was subject to heavy grazing up until seven years prior to the study. The ungrazed site within the park boundaries had been protected from grazing for 20 years prior to the study and had a well-developed algal-lichen-moss crust. We found that the algae of the grazed site had recovered in terms of degree of crusting. There were no significant differences in the algal communities of the two sites when prevalent species were used …
New South American Leafhoppers In The Genus Docalidia, With A Key To 37 Species (Cicadellidae: Coelidiinae, Teruliini), M. W. Neilson
New South American Leafhoppers In The Genus Docalidia, With A Key To 37 Species (Cicadellidae: Coelidiinae, Teruliini), M. W. Neilson
Great Basin Naturalist
Ten new species of Docalidia are described and illustrated. These are pennyi, gracilitas, zanoli, triquetra, paracrista, convexa, setacea, and caterva from Brazil and vesica and vella from Peru. A key to males of 37 species described since the last revision of the genus is included. The number of known species is now 116, making Docalidia the largest teruliine genus.
The Metamorphosis Of Faustian Sensibility 1630-1800, David B. Richardson
The Metamorphosis Of Faustian Sensibility 1630-1800, David B. Richardson
Comparative Civilizations Review
No abstract provided.
Therapeutic Foster Care, David C. Willis
Therapeutic Foster Care, David C. Willis
Issues in Religion and Psychotherapy
No abstract provided.
Infection Of Young Douglas-Firs And Spruces By Dwarf Mistletoes In The Southwest, Robert L. Mathiasen
Infection Of Young Douglas-Firs And Spruces By Dwarf Mistletoes In The Southwest, Robert L. Mathiasen
Great Basin Naturalist
Mistletoe infection of Douglas-fir and spruce seedlings increased as the mean dwarf mistletoe rating of the overstory, seedling density, and total age of seedlings increased. Percent of spruce seedlings infected increased more rapidly than for Douglas-fir as overstory dwarf mistletoe ratings increased. However, the intensity of infection as measured by the mean dwarf mistletoe rating of seedlings, increased at about the same rate for spruce and Douglas-fir. Percent infection of seedlings less than 20 years total age was higher for spruce than for Douglas-fir. Douglas-fir and spruce seedling mortality was from two to three times greater in heavily infested stands …