Forest Sciences Commons^™

Interactive Map Code (R And Rstudio), Peter G. Butterfield

Data Files: White Oaks in Vinton Furnace Experimental Forest

Interactive map code puts data and coordinates into readable table format and creates data visualizations.

Arch Rock (Widths In Dendrochronology Format), Peter G. Butterfield, Ryan W. Mcewan

Data Files: White Oaks in Vinton Furnace Experimental Forest

Data in this collection regards white oak trees (Quercus alba) in Vinton Furnace Experimental Forest, Vinton County, Ohio. Affiliated images are available at http://ecommons.udayton.edu/mcewanlab_6_images.

File type: .csv

About the data:

• Column A: Year
• Column B and onward: Measurements of tree rings in millimeters; sample title appears in row 1
• Measurements taken using a Velmex Unislide and the Tellervo software application.

Coordinates Of Each Sample, Peter G. Butterfield, Ryan W. Mcewan

Data Files: White Oaks in Vinton Furnace Experimental Forest

Data in this collection regards white oak trees (Quercus alba) in Vinton Furnace Experimental Forest, Vinton County, Ohio. Affiliated images are available at http://ecommons.udayton.edu/mcewanlab_6_images.

File type: .csv

About the data:

• Column A: Year
• Column B and onward: Measurements of tree rings in millimeters; sample title appears in row 1
• Measurements taken using a Velmex Unislide and the Tellervo software application.

Watch Rock (Widths In Dendrochronology Format), Peter G. Butterfield, Ryan W. Mcewan

Data Files: White Oaks in Vinton Furnace Experimental Forest

Data in this collection regards white oak trees (Quercus alba) in Vinton Furnace Experimental Forest, Vinton County, Ohio. Affiliated images are available at http://ecommons.udayton.edu/mcewanlab_6_images.

File type: .csv

About the data:

• Column A: Year
• Column B and onward: Measurements of tree rings in millimeters; sample title appears in row 1
• Measurements taken using a Velmex Unislide and the Tellervo software application.

Watch Rock (Widths In Millimeters), Peter G. Butterfield, Ryan W. Mcewan

Data Files: White Oaks in Vinton Furnace Experimental Forest

Data in this collection regards white oak trees (Quercus alba) in Vinton Furnace Experimental Forest, Vinton County, Ohio. Affiliated images are available at http://ecommons.udayton.edu/mcewanlab_6_images.

File type: .csv

About the data:

• Column A: Year
• Column B and onward: Measurements of tree rings in millimeters; sample title appears in row 1
• Measurements taken using a Velmex Unislide and the Tellervo software application.

Arch Rock (Width In Millimeters), Peter G. Butterfield, Ryan W. Mcewan

Data Files: White Oaks in Vinton Furnace Experimental Forest

Data in this collection regards white oak trees (Quercus alba) in Vinton Furnace Experimental Forest, Vinton County, Ohio. Affiliated images are available at http://ecommons.udayton.edu/mcewanlab_6_images.

File type: .csv

About the data:

• Column A: Year
• Column B and onward: Measurements of tree rings in millimeters; sample title appears in row 1
• Measurements taken using a Velmex Unislide and the Tellervo software application.

Sample Diameter And Date Of Establishment, Peter G. Butterfield, Ryan W. Mcewan

Data Files: White Oaks in Vinton Furnace Experimental Forest

Data in this collection regards white oak trees (Quercus alba) in Vinton Furnace Experimental Forest, Vinton County, Ohio. Affiliated images are available at http://ecommons.udayton.edu/mcewanlab_6_images.

File type: .csv

About the data:

• Column A: Year
• Column B and onward: Measurements of tree rings in millimeters; sample title appears in row 1
• Measurements taken using a Velmex Unislide and the Tellervo software application.

Data For Gridding, Joseph D. Birch, James A. Lutz, Soren Struckman, Jessica Miesel, Justine Karst

Browse all Datasets

Background: Large-diameter trees have an outsized influence on aboveground forest dynamics, composition, and structure. Although their influence on aboveground processes is well studied, their role in shaping belowground fungal communities is largely unknown. We sought to test if (H1) fungal community spatial structure matched aboveground forest structure, (H2) fungal functional guilds exhibited differential associations to aboveground tree, snag, and deadwood, and (H3) that large-diameter trees and snags have a larger influence on fungal community richness than smaller-diameter trees. We used MiSeq sequencing of fungal communities collected from soils in a spatially intensive survey in a portion of Cedar Breaks National …

The Relationship Between Forest Fires And Forest Dynamics In California’S North Coast Bioregion: How Altered Fire Regimes Have Affected The Vegetative Outcomes Of Oak Woodlands And Mixed Conifer Forests, Max Bencomo

Master's Projects and Capstones

Wildfire is a necessary part of ecosystem function in California, but fire suppression and the spread of invasive species have endangered many ecosystems. The North Coast bioregion of California has seen dramatic shifts in forest ecology and vegetative density, largely due to the disruption of historic fire regimes. Historic fire regimes were previously maintained through indigenous land management, but the arrival of European settlers in the 1850’s initiated the changes reflected in current fire regimes. Not only is the North Coast bioregion the hotbed of recent fire activity, it is experiencing decreased counts of heterogeneity within forests while also seeing …

Shifts In Biomass And Productivity For A Subtropical Dry Forest In Response To Simulated Elevated Hurricane Disturbances, Jennifer A. Holm, Skip J. Van Bloem, Guy R. Larocque, Herman H. Shugart

Skip Van Bloem

Caribbean tropical forests are subject to hurricane disturbances of great variability. In addition to natural storm incongruity, climate change can alter storm formation, duration, frequency, and intensity. This model-based investigation assessed the impacts of multiple storms of different intensities and occurrence frequencies on the long-term dynamics of subtropical dry forests in Puerto Rico. Using the previously validated individual-based gap model ZELIG-TROP, we developed a new hurricane damage routine and parameterized it with site- and species-specific hurricane effects. A baseline case with the reconstructed historical hurricane regime represented the control condition. Ten treatment cases, reflecting plausible shifts in hurricane regimes, manipulated …

More Than The Sum Of Its Parts: How Disturbance Interactions Shape Forest Dynamics Under Climate Change, Melissa S. Lucash, Robert M. Scheller, Brian R. Sturtevant, Eric J. Gustafson, Alec M. Kretchun, Jane R. Foster

Geography Faculty Publications and Presentations

Interactions among disturbances are seldom quantified, and how they will be affected by climate change is even more uncertain. In this study, we sought to better understand how interactions among disturbances shift under climate change by applying a process-based landscape disturbance and succession model (LANDIS-II) to project disturbance regimes under climate change in north-central Minnesota, USA. Specifically, we (1) contrasted mortality rates and the extent of disturbance for four individual (single) disturbance regimes (fire, insects, wind, or forest management) vs. all four disturbance regimes operating simultaneously (concurrent) under multiple climate change scenarios and (2) determined how climate change interacts with …

Remote Sensing Methods And Applications For Detecting Change In Forest Ecosystems, David James Gudex-Cross

Graduate College Dissertations and Theses

Forest ecosystems are being altered by climate change, invasive species, and additional stressors. Our ability to detect these changes and quantify their impacts relies on detailed data across spatial and temporal scales. This dissertation expands the ecological utility of long-term satellite imagery by developing high quality forest mapping products and examining spatiotemporal changes in tree species abundance and phenology across the northeastern United States (US; the ‘Northeast’).

Species/genus-level forest composition maps were developed by integrating field data and Landsat images to model abundance at a sub-pixel scale. These abundance maps were then used to 1) produce a more detailed, accurate …

Shifts In Biomass And Productivity For A Subtropical Dry Forest In Response To Simulated Elevated Hurricane Disturbances, Jennifer A. Holm, Skip J. Van Bloem, Guy R. Larocque, Herman H. Shugart

Publications

Caribbean tropical forests are subject to hurricane disturbances of great variability. In addition to natural storm incongruity, climate change can alter storm formation, duration, frequency, and intensity. This model-based investigation assessed the impacts of multiple storms of different intensities and occurrence frequencies on the long-term dynamics of subtropical dry forests in Puerto Rico. Using the previously validated individual-based gap model ZELIG-TROP, we developed a new hurricane damage routine and parameterized it with site- and species-specific hurricane effects. A baseline case with the reconstructed historical hurricane regime represented the control condition. Ten treatment cases, reflecting plausible shifts in hurricane regimes, manipulated …

A Multiple‐Scale Assessment Of Long‐Term Aspen Persistence And Elevational Range Shifts In The Colorado Front Range, Mario Bretfeld, Scott B. Franklin, Robert K. Peet

Aspen Bibliography

Aspen forests and woodlands are some of the most species‐rich forest communities in the northern hemisphere. Changing climate, altered disturbance regimes, land use, and increased herbivore pressure threaten these forests both in Eurasia and North America. In addition, rapid mortality dubbed “Sudden Aspen Decline” is a concern for aspen's long‐term presence in the western United States, especially Colorado and Utah. Yet it is still unclear whether aspen is persistent or declining at the landscape scale. We assessed aspen persistence at different spatial scales in the Colorado Front Range by resampling 89 plots containing aspen from among 305 vegetation plots sampled …

Interactions Among Spruce Beetle Disturbance, Climate Change And Forest Dynamics Captured By A Forest Landscape Model, Christian Temperli, Thomas T. Veblen, Sarah J. Hart, Dominik Kulakowski, Alan J. Tepley

Geography

The risk of bark beetle outbreaks is widely predicted to increase because of a warming climate that accelerates temperature-driven beetle population growth and drought stress that impairs host tree defenses. However, few if any studies have explicitly evaluated climatically enhanced beetle population dynamics in relation to climate-driven changes in forest composition and structure that may alter forest suitability for beetle infestation. We synthesized current understanding of the interactions among climate, spruce beetles (Dendroctonus rufipennis) and forest dynamics to parameterize and further advance the bark beetle module of a dynamic forest landscape model (LandClim) that also integrates fire and wind disturbance …

Effects Of Ungulate Herbivory On Aspen, Cottonwood, And Willow Development Under Forest Fuels Treatment Regimes, Bryan A. Endress, Michael J. Wisdom, Martin Vavra, Catherine G. Parks, Brian L. Dick, Bridgett J. Naylor, Jennifer M. Boyd

USDA Forest Service / UNL Faculty Publications

Herbivory by domestic and wild ungulates can dramatically affect vegetation structure, composition and dynamics in nearly every terrestrial ecosystem of the world. These effects are of particular concern in forests of western North America, where intensive herbivory by native and domestic ungulates has the potential to substantially reduce or eliminate deciduous, highly palatable species of aspen (Populus tremuloides), cottonwood (Populus trichocarpa), and willow (Salix spp.). In turn, differential herbivory pressure may favor greater establishment of unpalatable conifers that serve as ladder fuels for stand-replacing fires. The resulting high fuel loads often require silvicultural fuels reductions …

Trends In Forestry Modelling, Guillermo A. Mendoza, Jerome K. Vanclay

Professor Jerome K Vanclay

Different types of models have been developed and applied to address various problems and issues in forestry. This paper reviews modelling trends in four areas, namely, forest management planning and decision-making, forest dynamics and growth projection, forest landscape and spatial models and participatory forest management models. The first type includes decision models generally structured as optimization models applied to forest planning. These models evolved from single objective to multiple objectives with spatial dimensions, including visualization. The second type includes forest dynamics models designed to examine the growth response of trees using process-based empirical or conceptual models. Demands for 'close to …

Dynamics Of Forest Structure Under Different Silvicultural Regimes In The Acadian Forest, Michael R. Saunders

Electronic Theses and Dissertations

Research plots in many long-term studies of forest ecosystems often cannot be used for spatial modeling because of their small scale and nested inventory design. This has been unfortunate as these plots represent some of the best records of structural development as affected by forest management. I developed methodologies to reconstruct both tree height growth and spatial pattern in these types of plots from historical inventory records and stem-mapped data, and then retrospectively investigated 3-dimensional structural development as affected by five silvicultural and harvesting treatments (unmanaged natural area, commercial clearcut, fixed-diameter limit, 5-year selection, and 3-stage shelterwood— with and without …

Vegetation Dynamics And Tree Radial Growth Response In Harvest Gaps, Natural Gaps, And Closed Canopy Conditions In Maine's Acadian Forest, Darci A. Schofield

Electronic Theses and Dissertations

The creation of natural canopy gaps is an important ecological process in the Acadian forest. Designing harvest gaps that emulate natural gap dynamics may be important for maintaining structural and biological diversity, as well as naturally regenerating desired tree species. We used a controlled study to 1) compare vegetation dynamics among and within harvested gaps, natural gaps, and under a closed canopy, and 2) examine the growth response of mature overstory edge trees of harvests gap and saplings inside of gaps as possible methods for dating natural gaps in the Acadian forest. For the vegetation dynamics study (objective I), we …

Modeling Forest Dynamics At The Landscape Scale: Integrating A Computer Simulation Model And Geographic Information System, David W. Betz

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research demonstrates the ability to integrate a computer simulation model with a geographic information system (GIS) to predict forest community dynamics in both the spatial and temporal dimensions. A landscape scale computer simulation model, LANDSIM, was coupled with the Arc/Info GIS to simulate the interaction of forest fires and forest succession at Bryce Canyon National Park, Utah, and to produce maps of the predicted community types. The sensitivity of the model was tested with respect to the fire return interval, maximum neighbor spread, and the effect of slope upon the spread of simulated fires. The model predicts that each …

Modeling Forest Dynamics Based On Stand Level Resource Allocation, Geoffrey Candler Poole

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An ecologically based model of forest succession is presented. In the model, trees compete for a share of limited growth resources available from their environment. Competition is reflected by each tree's effect on the resource pool and is not explicitly modeled. Model parameters were fit to field data from subalpine forests of the Rocky Mountains. A technique for estimating model parameters from understory-tolerance rankings and silvical characteristics of each species is also presented. The model's output was consistent with our current understanding of forest dynamics. Emergent properties of the model also mimicked natural processes such as self-thinning, release, and maximum …