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A Comparison Of Fuel Reduction Methods For Wildfire Risk Management And Climate Change Resiliency In Mixed Conifer Forests In The Sierra Nevada, Heather Navle 2020 The University of San Francisco

A Comparison Of Fuel Reduction Methods For Wildfire Risk Management And Climate Change Resiliency In Mixed Conifer Forests In The Sierra Nevada, Heather Navle

Master's Projects and Capstones

Wildfires in the mixed conifer forests of California’s Sierra Nevada have been a common and natural disturbance for thousands of years, historically occurring every 3 to 30 years. The flora and fauna of the mixed conifer forest have evolved to depend on low to moderate severity wildfires for reproduction, foraging, and habitat. However, the Sierra Nevada has experienced dramatic environmental changes over the past ~150 years as a result of three main factors: wildfire suppression, climate change, and habitat loss. Because of the threat wildfires pose to human lives, property and timber harvest, they have been suppressed to an ...


Shifting Public Perception: Climate Change Means Living With Fire And Smoke, Robert Froembling 2020 Seattle University School of Law

Shifting Public Perception: Climate Change Means Living With Fire And Smoke, Robert Froembling

Seattle Journal of Technology, Environmental & Innovation Law

The urgency to prepare for the climate crisis has never been greater. We are currently living in the sixth mass extinction and the effects are only going to accelerate. We will inherit more wildfires, larger wildfires, and more frequent wildfires.

This piece is not meant to stoke fear in its readers or be depressing, but to shift public perception on what our future holds by evaluating the laws and science presented to us. This piece will look at regional and federal regulations and assess the increased rate of forest fires and the grave public health concerns from stagnant smoke specifically ...


A Floristic Survey Of Andalusia: A Historic Preservation Site In Baldwin County, Georgia, William Pharr 2020 Georgia College

A Floristic Survey Of Andalusia: A Historic Preservation Site In Baldwin County, Georgia, William Pharr

Biology Theses

A survey of the vascular plants of Andalusia, a historic preservation site located along Highway 441 north of Milledgeville in Baldwin County, Georgia, was conducted between August 2018 and February 2020. The site was the late home of esteemed author, Flannery O’Connor, and resides along the Georgia fall line, making it a historically significant area that could yield a unique plant community convergence, as well as rare endemic species. This floristic inventory provides baseline data on the species and plant communities of Andalusia for use in future studies regarding the flora of this area. A total of 191 vascular ...


Regional Forest Volume Estimation By Expanding Lidar Samples Using Multi-Sensor Satellite Data, Bo Xie, Chunxiang Cao, Min Xu, Barjeece Bashir, Ramesh P. Singh, Zhibin Huang, Xiaojuan Lin 2020 Chinese Academy of Sciences

Regional Forest Volume Estimation By Expanding Lidar Samples Using Multi-Sensor Satellite Data, Bo Xie, Chunxiang Cao, Min Xu, Barjeece Bashir, Ramesh P. Singh, Zhibin Huang, Xiaojuan Lin

Mathematics, Physics, and Computer Science Faculty Articles and Research

Accurate information regarding forest volume plays an important role in estimating afforestation, timber harvesting, and forest ecological services. Traditionally, operations on forest growing stock volume using field measurements are labor-intensive and time-consuming. Recently, remote sensing technology has emerged as a time-cost efficient method for forest inventory. In the present study, we have adopted three procedures, including samples expanding, feature selection, and results generation and evaluation. Extrapolating the samples from Light Detection and Ranging (LiDAR) scanning is the most important step in satisfying the requirement of sample size for nonparametric methods operation and result in accuracy improvement. Besides, mean decrease Gini ...


Remote Sensing Monitoring Of Vegetation Dynamic Changes After Fire In The Greater Hinggan Mountain Area: The Algorithm And Application For Eliminating Phenological Impacts, Zhibin Huang, Chunxiang Cao, Wei Chen, Min Xu, Yongfeng Dang, Ramesh P. Singh, Barjeece Bashir, Bo Xie, Xiaojuan Lin 2020 Chinese Academy of Sciences

Remote Sensing Monitoring Of Vegetation Dynamic Changes After Fire In The Greater Hinggan Mountain Area: The Algorithm And Application For Eliminating Phenological Impacts, Zhibin Huang, Chunxiang Cao, Wei Chen, Min Xu, Yongfeng Dang, Ramesh P. Singh, Barjeece Bashir, Bo Xie, Xiaojuan Lin

Mathematics, Physics, and Computer Science Faculty Articles and Research

Fires are frequent in boreal forests affecting forest areas. The detection of forest disturbances and the monitoring of forest restoration are critical for forest management. Vegetation phenology information in remote sensing images may interfere with the monitoring of vegetation restoration, but little research has been done on this issue. Remote sensing and the geographic information system (GIS) have emerged as important tools in providing valuable information about vegetation phenology. Based on the MODIS and Landsat time-series images acquired from 2000 to 2018, this study uses the spatio-temporal data fusion method to construct reflectance images of vegetation with a relatively consistent ...


Senescent Trees Stabilize Aboveground Wood Net Primary Production Immediately After Disturbance, Maxim S. Grigri 2020 Virginia Commonwealth University

Senescent Trees Stabilize Aboveground Wood Net Primary Production Immediately After Disturbance, Maxim S. Grigri

Theses and Dissertations

In the United States, forests sequester 17% of national carbon (C) emissions annually (UGCRP, 2018), however shifting forest disturbances threaten the stability of this essential C sink. Unlike the high severity, stand-replacing disturbances that were widespread a century ago, today’s eastern temperate forests experience frequent low-to-moderate severity disturbances from invasive pests and pathogens with mixed effects on net primary production (NPP). Carbon cycling stability after disturbance has been reported, however, the mechanisms underlying immediate NPP stability or decline are not well understood. Through weekly measurements of production in a landscape scale experiment, we show that the sustained growth of ...


Resource Selection And Calving Success Of Moose In Colorado, Forest P. Hayes 2020 University of Montana, Missoula

Resource Selection And Calving Success Of Moose In Colorado, Forest P. Hayes

Graduate Student Theses, Dissertations, & Professional Papers

Across much of North America, moose populations (Alces alces) are declining due to disease, predation, climate, and anthropogenic pressures. Despite this, populations of moose in Colorado have continued to grow. Studying successful (i.e., persistent or growing) populations of moose can facilitate the continued conservation of the species by identifying habitat features critical for moose persistence.

First, I evaluated calving success of moose in Colorado and the impact of willow habitat quality and nutrition. I then estimated the probability of female moose having a calf using repeated observations in a Bayesian occupancy model. I assigned values for dry matter digestibility ...


Interspecific Gene Flow Potentiates Adaptive Evolution In A Hybrid Zone Formed Between Pinus Strobiformis And Pinus Flexilis, Mitra Menon 2020 Virginia Commonwealth University

Interspecific Gene Flow Potentiates Adaptive Evolution In A Hybrid Zone Formed Between Pinus Strobiformis And Pinus Flexilis, Mitra Menon

Theses and Dissertations

Species range margins are often characterised by high degrees of habitat fragmentation resulting in low genetic diversity and higher gene flow from populations at the core of the species range. Interspecific gene flow from a closely related species with abutting range margins can increase standing genetic diversity and generate novel allelic combinations thereby alleviating limits to adaptive evolution in range margin populations. Hybridization driven interspecific gene flow has played a key role in the demographic history of several conifer due to their life history characteristics such as weak crossability barriers and long generation times. Nevertheless, demonstrating whether introgression is adaptive ...


Protecting The Wui In California: Greenbelts Vs Thinning For Wildfire Threats To Homes, Jon E. Keeley 2020 U.S. Geological Survey

Protecting The Wui In California: Greenbelts Vs Thinning For Wildfire Threats To Homes, Jon E. Keeley

Bulletin of the Southern California Academy of Sciences

This study utilized native chaparral and sage scrub shrubs to evaluate the impact of light summer irrigation on live fuel moisture content (LFMC) and predicted fire behavior. As to be expected LFMC varied markedly throughout the year being over 100% in winter in all species and treatments but differed markedly by treatment in the summer and fall. For most species lightly irrigated plants had the highest LFMC in the summer and fall, followed by thinned treatments and controls. These differences in moisture content coupled with structural differences in the vegetation contributed to expected differences in flame length and rate of ...


Covers, 2020 Occidental College

Covers

Bulletin of the Southern California Academy of Sciences

No abstract provided.


Forests And Mental Health In South Africa: Panel Data Evidence, Dambala Gelo 2019 University of Pretoria

Forests And Mental Health In South Africa: Panel Data Evidence, Dambala Gelo

Forest Collaborative Research

Slides from a presentation that examines the linkages between the green environment (urban forests, green open urban space) and mental health in South Africa. The author used representative panel data from the National Income Dynamics Survey, including the Center for Epidemiological Studies Short Depression Scale, to uncover these links.


Arboriculture Safety Around The World, Jamie Lim 2019 University of Massachusetts Amherst

Arboriculture Safety Around The World, Jamie Lim

Masters Theses

Arboricultural work is inherently dangerous, with more serious injuries and fatalities than most other professions. Safety standards exist in some jurisdictions, but it is unclear how many standards exist, how they compare to one another, and whether (and how many) jurisdictions share standards. To establish a baseline understanding of these issues, my objectives were to (i) develop a database of existing standards, (ii) identify the most frequently occurring safety topics and (iii) describe similarities and differences in safety topics among standards from different countries. I worked with a variety of contacts and traditional university library resources to identify, obtain, analyze ...


Comparison Of The Survival And Growth Of West Gulf Coastal Plain Pine In East Texas, Jamie Hooker 2019 Stephen F. Austin State University

Comparison Of The Survival And Growth Of West Gulf Coastal Plain Pine In East Texas, Jamie Hooker

Electronic Theses and Dissertations

West Gulf Coastal Plain provenance loblolly (Pinus taeda L.), longleaf (Pinus palustris Mill.), shortleaf (Pinus echinata Mill.), and slash pines (Pinus elliottii Engelm.) were planted in East Texas to compare initial growth and survival. Containerized seedlings were planted in December 2015 on three study sites in Shelby, Houston, and Cherokee counties using a randomized complete block design. Seedlings were measured in January-February 2016 and again January-February 2017, January 2018, and January 2019. Three years after planting, survival was best (76.4%) in Houston County and was lowest in Cherokee County (26.4). Damage by Texas leafcutter ants (Atta texana) caused ...


Within-Stream Variability Data, Kevin W. Custer, Julia I. Chapman, Ryan W. McEwan 2019 University of Dayton

Within-Stream Variability Data, Kevin W. Custer, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Wetted Width, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. McEwan 2019 University of Dayton

Wetted Width, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Terrestrial Fine Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. McEwan 2019 University of Dayton

Terrestrial Fine Woody Debris, Erin C. Rowekamp, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Water Toxicity Effects Test: Physicochemical Data, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. McEwan 2019 University of Dayton

Water Toxicity Effects Test: Physicochemical Data, Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Time To Colonization Trial Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. McEwan 2019 University of Dayton

Time To Colonization Trial Data, M. E. Maloney, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Twig And Fruit Litter Basket, Erin C. Rowekamp, Taylor M. Buskey, Julia I. Chapman, Ryan W. McEwan 2019 University of Dayton

Twig And Fruit Litter Basket, Erin C. Rowekamp, Taylor M. Buskey, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


Water Toxicity Effects Test: Survival And Growth (Dry Mass), Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. McEwan 2019 University of Dayton

Water Toxicity Effects Test: Survival And Growth (Dry Mass), Kevin W. Custer, Eric B. Borth, Julia I. Chapman, Ryan W. Mcewan

Ryan McEwan

No abstract provided.


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