Digital Commons Network^™

Windbreaks An Old System With A New Look, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Windbreaks: Are They Effective?, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Silvopastoral Systems In The Pine Ridge Of Nebraska, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Windbreak Practices, James R. Brandle

School of Natural Resources: Faculty Publications

No abstract provided.

Oxygen Budget For Lake Ogallala, Kyle D. Hoagland, John C. Holz, Tadd M. Barrow, Richard J. Ruane

School of Natural Resources: Faculty Publications

Lake Ogallala, located below Kingsley Dam which impounds Lake McConaughy in Keith County, Nebraska, is a 260-surface hectare lake with an average depth of approximately eight meters. The lake provides mUltiple uses including a sport fishery and a hydropower and irrigation regulation basin. Since the installation of the hydroelectric generating plant in 1984 (Kingsley Dam was constructed in 1942) and the continued eutrophication of Lake McConaughy, dissolved oxygen concentrations have generally declined in Lake Ogallala. Hypolimnetic withdrawal from Lake McConaughy results in depressed oxygen levels in Lake Ogallala during the mid to latter part of the summer, particularly in certain …

Late Albian Kiowa-Skull Creek Marine Transgression, Lower Dakota Formation, Eastern Margin Of Western Interior Seaway, R.L. Brenner, G.A. Ludvigson, B.J. Witzke, A.N. Zawistoski, E.P. Kvale, R.L. Ravn, R.M. Joeckel

School of Natural Resources: Faculty Publications

No abstract provided.

Potential Production And Environmental Effects Of Switchgrass And Traditional Crops Under Current And Greenhouse-Altered Climate In The Central United States: A Simulation Study, R.A. Brown, N.J. Rosenberg, Cynthia J. Hays, W.E. Easterling, L.O. Mearns

School of Natural Resources: Faculty Publications

If, as many climate change analysts _ speculate, industrial and other emissions of CO₂ can be offset by substitution of biofuels, large areas of land, including agricultural land, may be converted to the production of biomass feedstocks. This paper explores the feasibility for the Missouri–Iowa–Nebraska–Kansas (MINK) region of the US of converting some agricultural land to the production of switchgrass (Panicum virgatum L.), a perennial warm season grass, as a biomass energy crop. The erosion productivity impact calculator (EPIC) crop growth model simulated production of corn (Zea mays L.), sorghum (Sorghum bicolor (L.) Moench), soybean ( …

Observed Climate Variability And Change Of Relevance To The Biosphere, David R. Easterling, Thomas R. Karl, Kevin P. Gallo, David A. Robinson, Kevin E. Trenberth, Aiguo Dai

School of Natural Resources: Faculty Publications

In this paper we review the current instrumental evidence regarding climate variations and change during the 20th century emphasizing those changes that are likely to have direct interactions with the biosphere.

The Spectral Contribution Of Carotenoids To Light Absorption And Reflectance In Green Leaves, Y. Zur, A. A. Gitelson, O. B. Chivkunova, M. N. Merzlyak

School of Natural Resources: Faculty Publications

Absorbance and reflectance spectra in the visible and near infrared range of the spectrum, acquired for maple (Acer platanoides L.) leaves were studied. Standard deviation of absorbance spectra showed that in yellow to green leaves, with chlorophyll content at least up to 30 nmol/cm2, there is a spectral feature at 520 nm attributable to carotenoids. Reflectance around 520 nm also correlates closely with carotenoids content in yellow to green leaves. Thus, this spectral feature at 520 nm could be used as a measure of carotenoids content in green leaves and plants.

Breeding Season Demography And Movements Of Eastern Towhees At The Savannah River Site, South Carolina, David G. Krementz, Larkin A. Powell

School of Natural Resources: Faculty Publications

The Eastern Towhee (Pipilo erythrophthalmus) has undergone population declines across much of its range, especially in New England. Despite being a widespread and, at one time, a common species, relatively little is known about its natural history, ecology, or demographics. We conducted baseline research on Eastern Towhees at the Savannah River Site, South Carolina, in 1995 and 1996 to estimate breeding season survival rates, nest success rates, breeding densities, and daily movements. We also were interested in whether towhees had differences in survival and movement rates between young and mature managed pine stands. We found that survival rates during the …

Effects Of Temperature Anomalies On The Palmer Drought Severity Index In The Central United States, Q. Steven Hu, Gary D. Willson

School of Natural Resources: Faculty Publications

The purpose of this study is to improve our understanding of temperature and precipitation effects on the Palmer Drought Severity Index (PDSI). Both theoretical and observational analyses were applied to separate and compare temperature and precipitation effects on PDSI. The results showed that because of the dependence of PDSI on the ‘climatologically appropriate rainfall’, which is a function of time and varies with surface air temperature, the PDSI can be equally affected by temperature and precipitation, when both have similar magnitudes of anomalies. Calculations using observational data further illustrated the temperature influence on PDSI in different climate regions in the …

Remote Monitoring Of Selected Ground-Water Dominated Lakes In The Nebraska Sand Hills, David C. Gosselin, Donald C. Rundquist, Stuart K. Mcfeeters

School of Natural Resources: Faculty Publications

The Landsat-Multispectral Scanner (MSS) data were used to measure lake area fluctuations (1972-1989) for 130 groundwater dominated lakes in the Western Lakes Region of the Nebraska Sand Hills. In general, the pattern shown in lake area hydrographs was similar to that for in-situ lake elevations. In-situ lake-elevation data verify that remote monitoring of surface- area fluctuations, even at relatively coarse spatial resolution, is not only practical and useful, but also it elucidates the hydrologic characteristics of groundwater-dominated lakes of the Sand Hills. The apparent differences in behavior between lakes in the northern and southern portions of the study area may …

Process-Oriented Environmental Change Curriculum-Development Workshops, David C. Gosselin, Sherri Lowrey, Steven John Meyer

School of Natural Resources: Faculty Publications

To improve scientific literacy, K-12 educators need to: develop the ability to use and analyze data, incorporate data into their curriculum, and interact with teachers from other disciplines to create interdisciplinary units. A Process-Oriented Environmental Change Education workshop was conducted for eleven interdisciplinary teams, consisting of 21 teachers, in 1997 and 1998. The National Science Standards provided the criteria for the organization of the workshop. Inquiry and interpretation exercises helped to expand scientific knowledge and skills as well as the teachers’ use of technology. We explicitly discussed the uncertainty of science through group discussions and problem-solving activities. More than 85% …

Developing Sustainable Management Policy For The National Elk Refuge, Wyoming, Tim W. Clark, Denise Casey, Anders Halverson

Yale School of the Environment Bulletin Series

No abstract provided.

Messages From Frank's Landing: A Story Of Salmon, Treaties, And The Indian Way, Charles F. Wilkinson

Books, Reports, and Studies

This digital resource contains only an abstract, cover image and table of contents information from the published book.

Print copy of book is available in the University of Colorado’s Wise Law Library: http://lawpac.colorado.edu/record=b243280~S0

Contents: Muck Creek -- Nisqually River -- George Hugo Boldt -- Fort Lewis -- Wa He Lut -- Afterword

What Have We Been Doing?, Anderson B. Young

Research in Outdoor Education

A preface to the journal "Research in Outdoor Education," volume 5 is presented by the author on behalf of the Coalition for Education in the Outdoors (CEO) Research Committee.

Testing The Adventure Recreation Model: A Replication With Subjects Involved In A Required Outdoor Experience, Lynn Anderson, Dale Anderson, Anderson Young

Research in Outdoor Education

The Adventure Recreation Model, first pro­posed and tested by Ewert and Hollenhorst (1989), attempts to describe participant. charac­teristics and patterns of use in adventure recrea­tion activities. The model was originally tested with students at Ohio State University who were involved in an outdoor pursuits program con­sisting of a wide variety of outdoor adventure activities. This study replicated and extended this research by using subjects who participated in a required outdoor course with an outdoor adventure component. The purpose of the study was to test the fit of the adventure model with subjects who were expected to be more diverse in …

The Effects Of A Public School System's One Day Adventure Experience, Harlan Eagle, Janelle Gordon, Lindy Lewis

Research in Outdoor Education

This paper reports on a study that investi­gated the effects of a public school system's one-day adventure experience on students' self ­reports of life effectiveness. According to Neill, Marsh & Richards (1997), life effectiveness is defined as, "the psychological and behavioral aspects of human functioning which determine a person's effectiveness or proficiency in any given situation".

Cultural History Interpretation In Adventure Education: Promoting "Landfull" Experiences, Molly A. Baker

Research in Outdoor Education

This study was designed to investigate inter­pretation as a potential method of promoting "landfull" experiences. To date, no studies have explored the application of cultural history in­terpretation in adventure-based programming. This study investigated the use of interpretive activities that focus on the cultural history of the area during an adventure-based trip and evalu­ated the impact of this interpretation on partici­pants' experiences. As an exploratory effort, the purpose of this study was threefold: To provide a rationale for the use of cultural history inter­pretation in adventure-based programming; to create a prototype for integrating cultural history interpretation in adventure programming; and to …

Developing Life Skills Through Adventure Education: A Qualitative Study, Jim Sibthorp

Research in Outdoor Education

In an attempt to understand the process of learning during a longer duration adventure edu­cation program, students in Broadreach were interviewed after participating in a three week long sail and dive-training program. In addition to sail and dive training, the Broadreach pro­gram focuses on leadership and personal devel­opment through experiential methodology.

Front Matter, Coalition For Education In The Outdoors (Ceo)

Research in Outdoor Education

The Coalition for Education in the Outdoors initiated a Research Task Force in 1990 with the purpose of supporting the conduct of research in the field and the dissemination of the results. The symposium at Bradford Woods and these Proceedings offer evidence of the success of this task force. At the first symposium in 1992, there was general agreement that the symposium be a regular occurrence. The 2000 Symposim and these Proceedings are indicators of the Coalition's continued support of research in outdoor education. Information on future events will be available through the Coalition office.

This article includes the Editors, …

Trends And Issues In Not For Profit Camping, Deborah Bialeschki, Karla Henderson, Kate Dahowski

Research in Outdoor Education

The purpose of this study was to examine in­fluences on not for profit agencies involved in camping programs to determine critical trends and issues related to organized camping. The American Camping Association (ACA) Not for Profit Forum and Council funded this study. The project consisted of three data collection phases: 1) an extensive literature review; 2) a survey sent to a random sample of camp directors and their not for profit agency executives; and 3) focus groups conducted at a national ACA con­ference. This descriptive research study uses information from the second phase of this pro­ject to present quantitative data …

Leadership Development And Youth Camping: Determining A Relationship, Rachelle H. Toupence, Christine D. Townsend

Research in Outdoor Education

The terminology may have changed, but the concepts of "leaders" and "leadership" have been a part of human thought for thousands of years. Similarly, so has leadership education. Leadership is one of the core skills employers expect of their employees at every level (Scheneman, 1991) and leadership development has emerged as a goal of outdoor education (Fri­ese, Hendee, & Kinziger, 1998). Debate contin­ues concerning the most effective methods for developing leadership as in recent years leader­ship education has been brought to the forefront. This is borne out in leisure literature as well, where in the last decade scholars have begun …

Outdoor Adventure And Health: Supporting Empirical Data, Camille J. Bunting

Research in Outdoor Education

The intent of this paper is to introduce a theoretical framework for considering connec­tions between outdoor adventure and health, not to present the findings of one or two new re­search studies. A compilation of empirical data will be presented from various studies to illus­trate the proposed connections, and provide documentation for subjective observations and beliefs long held by outdoor adventure educa­tors. Therefore, the format that follows is not one of a typical research report, but of a position paper with supporting empirical data from the author's own research.

Benefits And Components Of An Inclusive Adventure Program For Families With Children Who Have A Disability, Kathleen Scholl, Leo Mcavoy, John Smith

Research in Outdoor Education

Due to the national movement in the 1970s to de-institutionalize individuals with dis­abilities, the vast majority of these children live with their families in community settings; how­ever, the recreation opportunities for these fami­lies to participate together in community spon­sored programs may be limited. There are many programs for children with disabilities, but few are designed for the entire family when one or more children have a disability. Shifting the fo­cus from the individual with the disability to the entire family can support and enrich the intrinsic strengths that already exist in the family (Clapp & Rudolph, 1993; Dunst, Trivette, Starnes, …

The Effects Of Environmental And Adventure Education Programs On The Wilderness Attitudes Of Japanese Early Adolescents, Taito Okamura

Research in Outdoor Education

The conceptual framework for this study is that outdoor education represents the integration of environmental education and adventure edu­cation (Bisson, 1998; Bunting, 1990; Donna, 1996; Priest, 1986). The purpose of the study was first to compare the effects of environmental and adventure education programs in a resident camp setting on the wilderness attitudes of Japa­nese early adolescents.

The Impact Of Camp Programs On Children With Disabilities: Opportunities For Independence, Ann Fullerton, Steve Brandon, Joel Arick

Research in Outdoor Education

The purpose of this article is to examine the impact of specialized, residential camp programs on children and youth with disabili­ties. In general, the question is: "Does the camp experience result in positive or negative impacts on development, and do these changes transfer to home or school?" Camps are rich in social (both Vgotsky's and Bandura's con­ceptualizations; Gredler, 1992) and experien­tial (Kolb, 1984) learning. In camps, learning occurs while doing tasks within the functional, meaningful contexts of daily and social life in the camp community. Moreover, the naturally occurring consequences of one's actions are immediate and salient. The extensive litera­ture …

The Effect Of Landfills On Rural Residential Property Values: Some Empirical Evidence., Rachel Bouvier, John M. Halstead, Karen S. Conway, Alberto B. Manalo

Natural Resources & the Environment

Abstract

The question of whether solid waste landfills affect residential property values has long been a subject of debate. Past research has resulted in mixed conclusions. The current study examines six landfills, which differ in size, operating status, and history of contamination. The effect of each landfill is estimated by the use of multiple regression. In five of the landfills, no statistically significant evidence of an effect was found. In the remaining case, evidence of an effect was found, indicating that houses in close proximity to this landfill suffered an average loss of about six percent in value.

The Wheat Book : Principles And Practice, W K. Anderson, J R. Garlinge

Bulletins 4000 -

Contents : Environment / revised by J. Cramb, J. Courtney and P. Tille - The structure and development of the cereal plant / revised by T.L. Setter and G. Carlton - Germination, vegetative and reproductive growth / revised by T.L. Setter and G. Carlton - Crop water use / D. Tennant - Nutrition / revised by M.D.A. Bolland, R.F. Brennan, J.W. Bowden, M.G. Mason, N.K. Edwards, M.M. Riley and S.W. Gartrell - Wheat in farming systems / revised by B. Bowden, P. Blackwell, P. Carmody, M. Ewing, R. Kingwell, R. L ghman, I. McFarlane, P. Michael, P. Nelson, I. Pritchard, …

Assessment Of Oak Woodland Resources In Blm’S Eugene District, David G. Chiller, David G. Vesely, William I. Dean

United States Bureau of Land Management: Staff Publications

Because of the significant loss of oak (Quercus spp.) habitat and the subsequent increased value placed on oak woodlands for wildlife habitat, the preservation and restoration of native oak woodlands has become a priority for land managers and conservationists in the Western United States. In 1998, reconnaissance surveys were conducted on 13 oak woodland sites managed by the Bureau of Land Management’s (BLM’s) Eugene District in Lane County, Oregon. The sites were classified as either meadow-type communities or woodland-type communities; oak patches within the sites were delineated; and the topographic features, vegetation structure, and composition of the sites were …