Managing For Multiple Objectives In Southwestern Forests: Evaluating The Trade-Offs Between Enhancing Mexican Spotted Owl Nest Habitat And Mitigating Potential Crown Fire, Daniel C. Deane Mckenna
All Graduate Theses and Dissertations
The Forest Inventory and Analysis (FIA), the United States’ forest census, measured sixty-six Mexican spotted owl nest stands in order gain insight into the structure and composition of the nest habitat of this threatened species. I used these data, along with the greater FIA database and the Forest Vegetation Simulator to explore questions surrounding the management of Mexican spotted owl habitat, specifically how to balance the objective of sustaining and enhancing nest habitat in face of increasing forest fire size and severity in the Southwest. My research consisted of three studies. The first study quantified the structure and composition of ...
Nitrous Oxide Emissions From Riparian Forest Buffers, Warm-Season And Cool-Season Grass Filters, And Crop Fields, 2018 Iowa State University
Nitrous Oxide Emissions From Riparian Forest Buffers, Warm-Season And Cool-Season Grass Filters, And Crop Fields, D. G. Kim, Thomas M. Isenhart, Timothy B. Parkin, Richard C. Schultz, Thomas E. Loynachan, James W. Raich
Thomas M. Isenhart
Denitrification within riparian buffers may trade reduced nonpoint source pollution of surface waters for increased greenhouse gas emissions resulting from denitrification-produced nitrous oxide (N2O). However, little is known about the N2O emission within conservation buffers established for water quality improvement or of the importance of short-term N2O peak emission following rewetting dry soils and thawing frozen soils. Such estimates are important in reducing uncertainties in current Intergovernmental Panel on Climate Change (IPCC) methodologies estimating soil N2O emission which are based on N inputs. This study contrasts N2O emission from riparian buffer systems of three perennial vegetation types and an adjacent ...
Utilizing Gis To Locate Endangered Gravel Hill Prairies Of The Wabash River Valley, 2018 Purdue University
Utilizing Gis To Locate Endangered Gravel Hill Prairies Of The Wabash River Valley, Ryan W.R. Schroeder
Engagement & Service-Learning Summit: Reciprocal & Sustainable Partnerships
The Gravel Hill Prairies (GHP’s) of the Wabash River Valley are an endangered ecosystem in the state of Indiana and provide optimal growing conditions for a number of state endangered plants. Currently only four remnants are known to exist near Lafayette, IN, found by a previous study conducted in 1980 by Post, Bacone, and Aldrich (Proceedings of the Indiana Academy of Science, 1984, vol. 94: 457-464). These unique ecosystems have been found to occur almost exclusively on soils classified as Rodman Gravelly Loams and Strawn-Rodman complexes which occur predominantly along the outwash terraces of the Wabash River and its ...
1999 Lilley Cornett Woods Overstory Data, 2018 University of Dayton
1999 Lilley Cornett Woods Overstory Data, Ryan W. Mcewan, Julia I. Chapman, Robert N. Muller
Data collected in 1999 on the overstory in the Big Everidge Hollow portion of the Lilley Cornett Woods Appalachian Ecological Research Station in southeastern Kentucky. Data key is provided in a supplemental file.
Accompanying photo by Ryan W. McEwan.
Using Unmanned Aerial Systems For Deriving Forest Stand Characteristics In Mixed Hardwoods Of West Virginia, 2018 West Virginia University
Using Unmanned Aerial Systems For Deriving Forest Stand Characteristics In Mixed Hardwoods Of West Virginia, Henry Liebermann, Jamie Schuler, Michael P. Strager, Angela K. Hentz, Aaron Maxwell
Journal of Geospatial Applications in Natural Resources
Forest inventory information is a principle driver for forest management decisions. Information gathered through these inventories provides a summary of the condition of forested stands. The method by which remote sensing aids land managers is changing rapidly. Imagery produced from unmanned aerial systems (UAS) offer high temporal and spatial resolutions to small-scale forest management. UAS imagery is less expensive and easier to coordinate to meet project needs compared to traditional manned aerial imagery. This study focused on producing an efficient and approachable work flow for producing forest stand board volume estimates from UAS imagery in mixed hardwood stands of West ...
Data: Pre-Fire Disturbance History Modulates Relationships Between Ground Cover And Post-Fire Conifer Regeneration, Nathan Gill, Dan Jarvis, Tom Veblen, John Rogan, Dominik Kulakowski
Understory vegetation and ground cover drive many important ecosystem processes, including tree seedling regeneration. The exact effect of ground cover on tree seedling establishment, survival, and growth depends on biophysical context. In subalpine forests, this context is largely determined by disturbances such as beetle outbreak, blowdown, and fire. Compounded disturbances that overlap in short succession can alter stand properties and trajectories in ways that are not predictable from the additive impact of individual disturbances. The aim of this study is to examine how compounded Dendroctonus rufipennis (spruce beetle; SB) outbreak followed by fire and compounded wind blowdown followed by fire ...
The Role Of Environmental Filtering In Structuring Appalachian Tree Communities: Topographic Influences On Functional Diversity Are Mediated Through Soil Characteristics, Julia I. Chapman, Ryan W. Mcewan
Biology Faculty Publications
Identifying the drivers of community assembly has long been a central goal in ecology, and the development of functional diversity indices has provided a new way of detecting the influence of environmental gradients on biotic communities. For an old-growth Appalachian forest, we used path analysis to understand how patterns of tree functional diversity relate to topography and soil gradients and to determine whether topographic effects are mediated through soil chemistry. All of our path models supported the idea of environmental filtering: stressful areas (high elevation, low soil moisture, low soil nutrients) were occupied by communities of low functional diversity, which ...
Ecological-Economic Assessment Of The Effects Of Freshwater Flow In The Florida Everglades On Recreational Fisheries, 2018 Florida International University
Ecological-Economic Assessment Of The Effects Of Freshwater Flow In The Florida Everglades On Recreational Fisheries, Christina Estela Brown, Mahadev G. Bhat, Jennifer S. Rehage, Ali Mirchi, Ross Boucek, Victor Engel, Jerald S. Ault, Pallab Mozumder, David Watkins, Michael Sukop
USDA Forest Service / UNL Faculty Publications
This research develops an integrated methodology to determine the economic value to anglers of recreational fishery ecosystem services in Everglades National Park that could result from different water management scenarios. The study first used bio-hydrological models to link managed freshwater inflows to indicators of fishery productivity and ecosystem health, then link those models to anglers' willingness-to-pay for various attributes of the recreational fishing experience and monthly fishing effort. This approach allowed us to estimate the foregone economic benefits of failing to meet monthly freshwater delivery targets. The study found that the managed freshwater delivery to the Park had declined substantially ...
On-Road Emissions Of Ammonia: An Underappreciated Source Of Atmospheric Nitrogen Deposition, 2018 USDA Forest Service
On-Road Emissions Of Ammonia: An Underappreciated Source Of Atmospheric Nitrogen Deposition, Mark E. Fenn, Andrzej Bytnerowicz, Susan L. Schilling, Dena M. Vallano, Erika S. Zavaleta, Stuart B. Weiss, Connor Morozumi, Linda H. Geiser, Kenneth Hanks
USDA Forest Service / UNL Faculty Publications
We provide updated spatial distribution and inventory data for on-road NH3 emissions for the continental United States (U.S.) On-road NH3 emissions were determined from on-road CO2 emissions data and empirical NH3:CO2 vehicle emissions ratios. Emissions of NH3 from on-road sources in urbanized regions are typically 0.1– 1.3 t km−2 yr−1 while NH3 emissions in agricultural regions generally range from 0.4–5.5 t km−2 yr−1, with a few hot spots as high as 5.5–11.2 t km−2 yr−1. Counties with ...
Landscape Host Abundance And Configuration Regulate Periodic Outbreak Behavior In Spruce Budworm (Choristoneura Fumiferana Clem.), Louis-Etienne Robert, Brian R. Sturtevant, Barry J. Cooke, Patrick M. A. James, Marie-Josee Fortin, Philip A. Townsend, Peter T. Wolter, Daniel Kneeshaw
Landscape-level forest management has long been hypothesized to affect forest insect outbreak dynamics, but empirical evidence remains elusive. We hypothesized that the combination of increased hardwood relative to host tree species, prevalence of younger forests, and fragmentation of those forests due to forest harvesting legacies would reduce outbreak intensity, increase outbreak frequency, and decrease spatial synchrony in spruce budworm (Choristoneura fumiferana Clem.) outbreaks. We investigated these hypotheses using tree ring samples collected across 51 sites pooled into 16 subareas distributed across a large ecoregion spanning the international border between Ontario (Canada), and Minnesota (USA). This ecoregion contains contrasting land management ...
Monitoring Soft-Mast Production In Pine Woodland Restoration Areas On The Ouachita National Forest, 2017 Stephen F Austin State University
Monitoring Soft-Mast Production In Pine Woodland Restoration Areas On The Ouachita National Forest, Tamara B. Wood
Electronic Theses and Dissertations
The use of prescribed fire is integral to the restoration of open woodland habitats in the southeast, including shortleaf pine (Pinus echinata) woodlands in the Ouachita Mountains. Mature pine habitats maintained with recurrent disturbances have an open understory with a rich floristic diversity that provides quality habitat for many wildlife species, including the endemic and endangered red-cockaded woodpecker (Picoides borealis). Fire has many potential benefits for wildlife; however, the effects of fire on several important woody soft-mast producing species are not fully understood. Soft-mast quantity and quality is a key component in determining year-round habitat quality for several wildlife species ...
Dna Barcoding Of Quercus Falcata, Quercus Palustris, Quercus Rubra, And Their Hybrids Using Rbcl, Matk, And Ycf1, 2017 Southern Adventist Univeristy
Dna Barcoding Of Quercus Falcata, Quercus Palustris, Quercus Rubra, And Their Hybrids Using Rbcl, Matk, And Ycf1, Mckinzie Johnson, Tim Trott
Research in Biology
No abstract provided.
Timber Talk, Vol. 55, No. 4, December 2017, 2017 University of Nebraska - Lincoln
Timber Talk, Vol. 55, No. 4, December 2017
Timber Talk: Nebraska Forest Industry Newsletter
Lumber Market Reports: Northern, Southern, Appalachian
Hardwood Lumber Prices: Green, Kiln-Dried, Pallet Lumber, Ties (7x9)
Tribal Walnut Timber Harvesting Expanding in Nebraska, by Anthony Crill, Bureau of Indian Affairs
To Influence Buyers, Tell Stories, by Paul Reilly, Reilly Sales Training
Green Star Energy Group, South Sioux City Celebrates Bioenergy Day
Welcome Kristina Hughes
Nebraska Forest Industry Spotlight: Native Lumber & Sawmill, Litchfield
Wood Businesses Work to Increase Marketing Skills
A Risk-Based Method For Estimating The Carbon Sequestration Budget For A Mixed Hardwood Forest, 2017 University of Arkansas, Fayetteville
A Risk-Based Method For Estimating The Carbon Sequestration Budget For A Mixed Hardwood Forest, Erin Cooper
Chemical Engineering Undergraduate Honors Theses
Carbon Dioxide (CO2) levels in the atmosphere have risen from approximately 310 ppm in the 1950’s to over 400 ppm as of 2015. This rise in CO2 has likely resulted in the observed warming trend of the earth’s atmosphere in the same time frame, causing significant concern in the scientific community. Several mitigation strategies have arisen to combat the upward trend of CO2 emissions in recent decades, among them being carbon sequestration- the process of capturing CO2 from the atmosphere and holding it for an extended period of time. This study used the U ...
Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, 2017 University of Minnesota - Duluth
Importance Of Scale, Land Cover, And Weather On The Abundance Of Bird Species In A Managed Forest, Alexis R. Grinde, Gerald J. Niemi, Brian R. Sturtevant, Hannah Panci, Wayne Thogmartin, Peter Wolter
Natural Resource Ecology and Management Publications
Climate change and habitat loss are projected to be the two greatest drivers of biodiversity loss over the coming century. While public lands have the potential to increase regional resilience of bird populations to these threats, long-term data are necessary to document species responses to changes in climate and habitat to better understand population vulnerabilities. We used generalized linear mixed models to determine the importance of stand-level characteristics, multi-scale land cover, and annual weather factors to the abundance of 61 bird species over a 20-year time frame in Chippewa National Forest, Minnesota, USA. Of the 61 species modeled, we were ...
Population Dynamics Of Ouachita Dusky Salamanders (Desmognathus Brimleyorum) In A Managed Forest Landscape, 2017 University of Arkansas, Fayetteville
Population Dynamics Of Ouachita Dusky Salamanders (Desmognathus Brimleyorum) In A Managed Forest Landscape, Kelly Marie Halloran
Theses and Dissertations
With anthropogenic alteration of landscapes increasing world-wide, managed forests are increasingly important as providers of ecosystem services including habitat for numerous wildlife species. It is crucial to maintain a balance between timber production and conservation of biodiversity on managed landscapes. Salamander populations can play key roles in the function and diversity of temperate forest ecosystems. Several studies have reported negative effects of forestry on terrestrial plethodontid salamanders, but less research has focused on stream-dwelling species, evaluated mechanisms driving observed shifts in abundance, or described the dynamics of populations residing in managed forests. Using a Before-After-Control-Impact design, we examined the effects ...
Oystershell Scale Impacts And Mitigation Options On The Kaibab And Coconino Nf’S, 2017 Utah State University
Oystershell Scale Impacts And Mitigation Options On The Kaibab And Coconino Nf’S, Amanda M. Grady
This report documents a site visit to evaluate aspen stands experiencing oystershell scale damage on the Kaibab and Coconino National Forest’s. The site visit was requested by Kaibab NF, foresters including; Josh Giles, Jessi Outzs, Michael Sedgeman, Woody Rokala and Coconino Silviculturist, Mark Nabel. On November 19, 2016, Amanda Grady accompanied the individuals listed above, to evaluate stand conditions within three aspen exclosures. Two were located on the Williams Ranger District, Kaibab NF in the vicinity of Spring Valley. The third exclosure was located on the Flagstaff RD, Coconino NF and accessed from HWY 89-A via the Pump House ...
Estimating Wildlife Biodiversity Of Pine Plantation Edges Of Contrasting Rotational Stages: A Case Study, 2017 Stephen F Austin State University
Estimating Wildlife Biodiversity Of Pine Plantation Edges Of Contrasting Rotational Stages: A Case Study, Joshua Perry Harris
Electronic Theses and Dissertations
ESTIMATING WILDLIFE BIODIVERSITY OF PINE PLANTATION EDGES OF CONTRASTING ROTATIONAL STAGES: A CASE STUDY
By: Joshua Harris, Dr. Daniel Scognamillo, Dr. Gary Kronrad, and Dr. Jeremy Stovall
Wildlife biodiversity was estimated amongst three loblolly pine (Pinus taeda) intra-plantation edge types of contrasting rotational phases in a two-year case study. Three structurally varied rotational phases that occur throughout plantation rotations combine to make three different edges: A= pre-thinned - post-thinned, B= pre-thinned - pre-clearcut, and C= post-thinned - pre-clearcut. For two summer seasons (May-August 2015-2016), invertebrates, birds, medium mammals, and small mammals were sampled in each edge type. Richness, extrapolated richness, two indices ...
Estimating The Range Shift And Harvesting Intensity Of Junipers In Bhutan (Eastern Himalaya), 2017 University of Misosuri, St Louis
Estimating The Range Shift And Harvesting Intensity Of Junipers In Bhutan (Eastern Himalaya), Rinchen Namgay
The authors of more than 97% of the scientific publications on climate change agree that global temperature has increased in the last six decades and is caused by human beings via emission of greenhouse gases in the atmosphere. This phenomenon has altered natural ecosystem functions, causing many species to shift to a more suitable habitat. Throughout the world, because of recent climate warming, many forms of range shift associated with climate warming has occurred. While animals can move as warming happens, plants being stationary organisms cannot move, so the difference in the distribution of different plant life stages is an ...
Sampling Effort And Uncertainty In Leaf Litterfall Mass And Nutrient Flux In Northern Hardwood Forests, 2017 State University of New York
Sampling Effort And Uncertainty In Leaf Litterfall Mass And Nutrient Flux In Northern Hardwood Forests, Yang Yang, Ruth D. Yanai, Craig R. See, Mary A. Arthur
Forestry and Natural Resources Faculty Publications
Designs for litterfall sampling can be improved by understanding the sources of uncertainty in litterfall mass and nutrient concentration. We compared the coefficient of variation of leaf litterfall mass and nutrient concentrations (nitrogen, phosphorus, calcium, magnesium, and potassium) at different spatial scales and across years for six northern hardwood species from 23 stands in the White Mountains of New Hampshire, USA. Stands with steeper slopes (P = 0.01), higher elevations (P = 0.05), and more westerly aspect (P = 0.002) had higher interannual variation in litter mass, probably due to a litter trap design that allowed litter to blow into ...