Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Life Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 8101 - 8130 of 8610

Full-Text Articles in Entire DC Network

The Ornithogeography Of The Great Plains States, Paul A. Johnsgard Dec 1978

The Ornithogeography Of The Great Plains States, Paul A. Johnsgard

Paul Johnsgard Collection

It has long been recognized that the Great Plains represent a major transition zone in the distribution patterns of North American birds; field guides traditionally have treated the 100° W.longitude meridian as a convenient dividing line between eastern and western faunas. Furthermore, this line rather neatly bisects the political subdivisions of the Great Plains, namely the "plains states" extending from North Dakota southward through South Dakota, Nebraska, Oklahoma, and Texas. Of these, Texas is the least typical, its climate and fauna is strongly influenced by the Gulf Coast on the east and the Chihuahuan desert on the west. As a …


The Maine Coast : Issues Considered, Maine Coastal Program Oct 1978

The Maine Coast : Issues Considered, Maine Coastal Program

Maine Collection

The Maine Coast : Issues Considered - A Report to the Governor by his Advisory Committee on Coastal Development and Conservation

Maine Coastal Program, Maine State Planning Office

Augusta, Maine (31 October 1978)

Contents: Introduction / Summary of Committee Recommendations / Fisheries / Port Development / Heavy Industry Siting / Travel and Tourism / Cumulative Impact of Development / Natural Resource Information Transfer


Nepal Studies Association Bulletin, Nos. 16-17, Nepal Studies Association, Donald A. Messerschmidt Oct 1978

Nepal Studies Association Bulletin, Nos. 16-17, Nepal Studies Association, Donald A. Messerschmidt

Nepal Studies Association Newsletter

No abstract provided.


Ua77/1 Western Alumnus, Vol. 49, No. 6, Wku Alumni Association Oct 1978

Ua77/1 Western Alumnus, Vol. 49, No. 6, Wku Alumni Association

WKU Administration Documents

Alumni magazine published by WKU. This issue has the following articles:

  • Dero Downing Steps Down
  • Douglas, Michele. Top Banana – Gary Riggs
  • Egan, Sherry. WKU State Climatic Center
  • Gibson, Debbie. I Kind of Believe It’s a Gift – Burt Feintuch, Folk Music
  • New on the Gridiron
  • Adams, Bob. Digital Voltmeter – Engineering Technology
  • Schock, Jack. The Projectile Point – Archaeology
  • Armstrong, Bryan. Confessions of a Journalism Intern
  • Highland, Jim. Terry Climer
  • Beauchamp, Donnie. Commonplace Things – Photography
  • Miller, Richard. The Exceptional Student – Psychology, Biology
  • Harry Snyder Speaks at Commencement
  • Douglas, Michele. Students Take Advantage of Study Trips Abroad
  • Western …


South Dakota Farm And Home Research (Fall 1978), South Dakota State University Oct 1978

South Dakota Farm And Home Research (Fall 1978), South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

This issue contains the 91st South Dakota Agricultural Experiment Station Annual Report. This report covers July 1, 1977 - June 30, 1978.

Director’s Comments [p] 3
Growth Promotants [p] 5
Ranch with a Difference [p] 9
Fat is Yellow [p] 13
New Role for Crop Wastes? [p] 16
Sun Power [p] 18
West River Center [p] 20
PLUS: The 91st Annual Report of the Agricultural Experiment Station


Sir Joseph Banks And The Botany Of Captain Cook’S Three Voyages Of Exploration, Phyllis I. Edwards Sep 1978

Sir Joseph Banks And The Botany Of Captain Cook’S Three Voyages Of Exploration, Phyllis I. Edwards

Pacific Studies

No abstract provided.


A Guide To The Dispersal Of Zoological Material From Captain Cook’S Voyages, P. J. P. Whitehead Sep 1978

A Guide To The Dispersal Of Zoological Material From Captain Cook’S Voyages, P. J. P. Whitehead

Pacific Studies

No abstract provided.


Euthanasia Of Dogs And Cats: An Analysis Of Experience And Current Knowledge With Recommendations For Research, T. Carding, M. W. Fox Aug 1978

Euthanasia Of Dogs And Cats: An Analysis Of Experience And Current Knowledge With Recommendations For Research, T. Carding, M. W. Fox

eBooks

1978 Special Report prepared by the Institute for the Study of Animal Problems


Conflict In Outdoor Recreation, Gerald R. Jacob May 1978

Conflict In Outdoor Recreation, Gerald R. Jacob

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The causes of conflict among users of outdoor recreation resources have received little attention from recreation researchers. Knowledge of factors responsible for conflict might assist recreation planners' attempts to reduce future instances of conflict and help management focus its conflict resolution efforts. A theory of conflict is offered as the first step in systematically procuring such knowledge. A definition and characteristics of outdoor recreation conflicts are presented; four comprehensive causes of user conflicts are proposed. Ten propositions are used to link these factors to conflict and suggest future research hypotheses. The social psychological dynamics of conflict, as described here, have …


The Botanical Results Of Captain Cook’S Three Voyages And Their Later Influence, William T. Stearn Apr 1978

The Botanical Results Of Captain Cook’S Three Voyages And Their Later Influence, William T. Stearn

Pacific Studies

No abstract provided.


A Comparison Of Unbleached Pulps From Cherry Heartwood And Sapwood, Craig Bethke Apr 1978

A Comparison Of Unbleached Pulps From Cherry Heartwood And Sapwood, Craig Bethke

Paper Engineering Senior Theses

The purpose of the project was to evaluate pulps made from cherry heartwood and sapwood.

The amount of heartwood a tree has is an individual trait of the tree rather than a function of geography or environment. Tree breeders can, through selection, reduce or increase the amount of heartwood if it is economically justifiable.

Three cherry logs with 50-50 heartwood to sapwood ratio were barked and chipped at S.D. Warren Company in Muskegon. The chips were separated, heartwood from sapwood, by the color difference.

The chips were cooked using 20% active alkali, 6 to 1 liquor ratio, for 1.5 hours …


Vegetational Communities On An Abandoned Farm In Van Buren County, Michigan, Larry G. Visser Apr 1978

Vegetational Communities On An Abandoned Farm In Van Buren County, Michigan, Larry G. Visser

Masters Theses

Introduction

Several studies have been made of xeric forests in southern Michigan which have developed through secondary succession following the cutting of the presettlement vegetation. Brewer et al. (1973) described such an area in Allegan County, Michigan which was dominated by presettlement pine and is now dominated by oak. The oak forests of the Harvey Ott Preserve in Calhoun County, Michigan have been described by Catana (1967). Studies of the oak forests in the Haven Hill area in southeastern Michigan have been made by Thompson (1953). In addition to these studies of xeric forests in southern Michigan, extensive studies of …


Bulletin 3108 - An Introduction To Beekeeping In Western Australia, Western Australian Department Of Agriculture Mar 1978

Bulletin 3108 - An Introduction To Beekeeping In Western Australia, Western Australian Department Of Agriculture

Bulletins - 3000 - 3999

The purpose of this bulletin is to provide those wishing to keep bees, or to become commercial honey producers, with background information about beekeeping in Western Australia. This bulletin does not pretend to teach you how to keep bees or produce honey. This subject is covered adequately in the various text books on beekeeping and in articles in the bee journals.


Lucille Vinyard Journal 1978, Lucille Vinyard Jan 1978

Lucille Vinyard Journal 1978, Lucille Vinyard

Lucille Vinyard Journal Collection

No abstract provided.


Optimum Yield And The Fcma: A Case For Economic Discrimination, Herrick J. Johnson Jan 1978

Optimum Yield And The Fcma: A Case For Economic Discrimination, Herrick J. Johnson

Marine Affairs Theses and Major Papers

Marine Affairs thesis from the University of Rhode Island.


Nepal Studies Association Bulletin, No. 15, Nepal Studies Association, Donald A. Messerschmidt Jan 1978

Nepal Studies Association Bulletin, No. 15, Nepal Studies Association, Donald A. Messerschmidt

Nepal Studies Association Newsletter

No abstract provided.


Ua35/11 Student Honors Research Bulletin, Wku Honors Program Jan 1978

Ua35/11 Student Honors Research Bulletin, Wku Honors Program

WKU Administration Documents

Papers representative of the variety of scholarly research conducted at WKU.

  • Adams, Kathy. The Appalachian Language
  • Barnett, Philip. A Study of Deviant Behavior of XYY Individuals in Regard to Environment and Genotype
  • Bell, Brooks. Loving, Loyal Linda Loman: An Interpretive Note
  • Danhauer, Janice. Motivating Workers Through Job Design
  • Davis, Barbara. The Transformation of a Man into a Man of Understanding in Murinbata Society
  • Davis, Diane. The Argot of the Homosexual
  • Jewell, Teresa. The Life Story of the Hero of World War I - Sergeant Alvin C. York
  • Lanham, Wayne. Das Knarrenschiff and a Ship of Fools: A Study in Influence …


Species Composition And Diversity Of Hawk Populations In Northeastern Arkansas, Earl L. Hanebrink, Keith B. Sutton, Alan F. Posey Jan 1978

Species Composition And Diversity Of Hawk Populations In Northeastern Arkansas, Earl L. Hanebrink, Keith B. Sutton, Alan F. Posey

Journal of the Arkansas Academy of Science

Species composition and diversity of hawk populations were analyzed for northeastern Arkansas by the use of roadside censuses conducted in September through April from 1974- 1977. Data from 10 years of Jonesboro Christmas Bird Counts were also analyzed. During the roadside survey 20,174 miles were driven and 1819 raptors were counted. Ten species were observed with the Red-tailed Hawk being most abundant followed by the Marsh Hawk and the American Kestrel. Eight species were recorded from the 10 years of Christmas Bird Counts. Annual breeding bird surveys and spot records turned up three additional species making a total of 14 …


Geographical Definition Of Mississippi Sound, Charles K. Eleuterius Jan 1978

Geographical Definition Of Mississippi Sound, Charles K. Eleuterius

Gulf and Caribbean Research

Boundaries for Mississippi Sound are determined by application of definitions, established surveying practices and observations of the physical processes of the area. U.S. Coast and Gcodetic charts 1266 (1972 edition), 1267 (1972 edition) and 1268 (1974 edition) were used in ascertaining the boundaries. These boundaries provide a formal geographical definition for Mississippi Sound.


Progress On Rock Glacier Research, John F. Shroder Jr., John R. Giardino Jan 1978

Progress On Rock Glacier Research, John F. Shroder Jr., John R. Giardino

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

This report is an account of research progress on rock glaciers of Afghanistan, Colorado, and Utah. Because of the preliminary nature of this work, some speculation is present; nevertheless, we think there is evidence for each major, new point expressed. The main thesis of our work is that rock glaciers are polygenetic and appear to be part of a continuum of similar landforms grading morphologically and, presumably, mechanically from one type to another type.


Epizoic Protozoa Of Planktonic Copepoda And Cladocera From A Small Eutrophic Lake, And Their Possible Use As Indicators Of Organic Water Pollution, Michael Stevens Henebry Jan 1978

Epizoic Protozoa Of Planktonic Copepoda And Cladocera From A Small Eutrophic Lake, And Their Possible Use As Indicators Of Organic Water Pollution, Michael Stevens Henebry

Masters Theses

The epizoic protozoa of planktonic copepoda and cladocera from a eutrophic lake (Ashmore Lake, Coles County, Illinois) were studied over a 13-week period in the summer and fall of 1975. All organisms were collected with a 125 micron mesh plankton net. Epizoans (all peritrichs and suctorians) were hosted by three of four species of copepods and four of the ten species of cladocerans. The percentage of total organisms hosting epizoans varied significantly (0.001 alpha level) by month, but averaged 11.6 percent. This high occurrence of epizoans was thought to be related to the highly-eutrophic conditions existing in the lake. If …


Iowa Environmental Education Needs Assessment: An Evaluation By Teachers And Administrators In Grades K-12, Debra Elaine Mcrae Jan 1978

Iowa Environmental Education Needs Assessment: An Evaluation By Teachers And Administrators In Grades K-12, Debra Elaine Mcrae

Dissertations and Theses @ UNI

An environmental education needs assessment of the Iowa public schools (K-12) was conducted during the spring of 1976. The assessment was conducted via mailed questionnaire to a randomly selected sample of 2128 teachers, principals and superintendents. The proportionately stratified sample was divided into eight sub-groups1 elementary teachers, elementary principals, secondary science teachers, secondary social science teachers, secondary other teachers (all other types of secondary teachers), secondary principals, superintendents and other administrators. The response rate was 53.8 percent. Responses were made on modified Likert scales. Statistical Package for the Social Sciences was used for data recording and computer analysis. Information obtained …


Planning For Regional Environmental Quality : The Case Of Japan's National Capital Region, Duane E. Roberts Jan 1978

Planning For Regional Environmental Quality : The Case Of Japan's National Capital Region, Duane E. Roberts

Dissertations and Theses

This study is concerned with Japan’s National Capital Region Development Plan. How to modify the capital plan and some of the correlative land policies of the Tokyo Metropolitan Government to more fully protect regional air and water quality is the problem dealt with in the study.


Nepal Studies Association Bulletin, No. 14, Nepal Studies Association, Donald A. Messerschmidt Oct 1977

Nepal Studies Association Bulletin, No. 14, Nepal Studies Association, Donald A. Messerschmidt

Nepal Studies Association Newsletter

No abstract provided.


An Evaluation Of Narrow Hybrid Zones In Vertebrates, William S. Moore Sep 1977

An Evaluation Of Narrow Hybrid Zones In Vertebrates, William S. Moore

Biological Sciences Faculty Research Publications

A review of the literature on vertebrate hybridization reveals the existence of a number of narrow hybrid zones. Three hypotheses have been suggested to explain the occurrence of these zones. The ephemeral-zone hypothesis states that hybridization will end either in speciation or fusion of the hybridizing taxa by means of introgression. The dynamic-equilibrium hypothesis allows the possibility that narrow hybrid zones might be stable: where hybrids are confined to a small area by steep selection gradients, "crystallization" of an antihybridization mechanism might be prevented by naive immigrants from the parental populations even though hybrids are selected against. The hybrid-superiority hypothesis …


The Sage Creek Mountain Local Fauna Of The Bridger Formation Near Lonetree, Wyoming, Steven W. Barker Aug 1977

The Sage Creek Mountain Local Fauna Of The Bridger Formation Near Lonetree, Wyoming, Steven W. Barker

Theses and Dissertations

The Bridger Formation in the Green River Basin has been divided into two members, the lower Black's Fork member and the upper Twin Buttes member. 'Ihe Black's Fork member is composed of' biostratigraphlc zones A and Band the Twin Buttes member is com-posed of biostratigraphic zones C, D and E. Recent workers have found that zones A and B contain the same fauna and therefore represent just one biostratigraphic zone (McGrew 1971, Robinson 1970). Future studies of the biostratigraphic zones of the Twin Buttes member are necessary to determine if the C, D and E zones are valid. Some are …


A Revision Of The Herbaceous Members Of The Genus Atriplex (Chenopodiaceae) For The State Of Utah, K. H. Thorne Jul 1977

A Revision Of The Herbaceous Members Of The Genus Atriplex (Chenopodiaceae) For The State Of Utah, K. H. Thorne

Theses and Dissertations

The herbaceous Atriplex species which occur in Utah are revised. This study is based on herbarium specimens and field observations throughout the state. My treatment largely follows that of Rall and Clements (1923). A brief discussion of the history, diagnostic characteristics and phylogeny is given. A descriptive key that includes all taxa has been prepared: type locality, synonyms, general habitat and distribution is reported for each entity. Illustrations and maps are included. One variety is described as new.


The Prairie Naturalist Volume 9, No. 2. June 1977 Jun 1977

The Prairie Naturalist Volume 9, No. 2. June 1977

The Prairie Naturalist

PROPAGULE DISPERSAL AMONG FOREST ISLANDS IN SOUTHEASTERN SOUTH DAKOTA ▪ J. W. Ranney and W. C. Johnson

GENERAL WEATHER CONSIDERATIONS FOR THE PRESCRIDED BURNING OF PRAIRIE IN NORTHWEST MINNESOTA ▪ W. D. Svedarsky and R. W. Sands

YELLOW-CROWNED NIGHT HERONS SIGHTED IN NORTH DAKOTA ▪ D. G. Jorde, G. L. Krapu, and R. K. Green


Relationships Of Vegetation To Environment In Canyonlands National Park, Walter Lee Loope May 1977

Relationships Of Vegetation To Environment In Canyonlands National Park, Walter Lee Loope

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The vegetation of Canyonlands National Park, Utah, has been described from 157 samples located throughout the Park. Species frequency, density and cover were recorded along with measurements of soil thickness, slope, aspect, elevation and geologic substrate at each site. Measurements of soil texture, pH, and electrical conductivity were taken for a representative subsample. A map of the vegetation of the Park was made by relating the sample points to their corresponding spectral signatures on vertical aerial photographs and locating boundaries between vegetation units by means of changes in photo signatures.

Vegetation in these arid to semi-arid environments appears to be …


Density And Diversity Responses Of Summer Bird Populations To The Structure Of Aspen And Spruce-Fir Communities On The Wasatch Plateau, Utah, Janet Lee Young May 1977

Density And Diversity Responses Of Summer Bird Populations To The Structure Of Aspen And Spruce-Fir Communities On The Wasatch Plateau, Utah, Janet Lee Young

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sixteen stands representing a range of structural variation in aspen, mixed aspen-conifer, and spruce-fir communities of the Wasatch Plateau, Utah, were censused by the sample count method. The stands were classified as eleven community types based on the understory dominants or indicator species and the cover types. Fifty bird species were recorded during the two seasons; thirty-two occurred in aspen cover, forty-four in mixed aspen-conifer cover, and twenty-two in spruce-fir.

Comparisons of the composition and density of bird populations were made between uniform stands of a single life form and more structurally complex stands of either single or mixed life …