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High-Purity Recycling Of Hematite And Zn/Cu Mixture From Waste Smelting Slag, Yang Huo, Xiang Song, Suiyi Zhu, Yu Chen, Xue Lin, Yaqiong Wu, Zhan Qu, Ting Su, Xinfeng Xie 2020 Northeast Normal University 81818app手机版下载

High-Purity Recycling Of Hematite And Zn/Cu Mixture From Waste Smelting Slag, Yang Huo, Xiang Song, Suiyi Zhu, Yu Chen, Xue Lin, Yaqiong Wu, Zhan Qu, Ting Su, Xinfeng Xie

Michigan Tech Publications

81818app手机版下载In this study, Zn/Cu-bearing smelting slag was recycled via an integrated acid dissolution and hematite precipitation method. The slag was dissolved in nitric acid to generate an acid solution containing 23.5 g/L Fe, 4.45 g/L Zn and 2.81 g/L Cu, which was subjected to hydrothermal treatment with the addition of levulinic acid (LA). More than 99.95% of the initial Fe content was removed as hematite particles with diameters of approximately 200 nm, and the residual Fe concentration in the acid was 0.43 mg/L. The generated hematite contained 97.3% Fe2O3 ...


Smokejumper Magazine, October 2020, National Smokejumper Association 2020 Eastern Washington University 81818app手机版下载

Smokejumper Magazine, October 2020, National Smokejumper Association

Smokejumper and Static Line Magazines

This issue of the National Smokejumper Association (NSA) Smokejumper Magazine contains the following articles: Message from the President; Part II: Canopies Over the Kandik; Happy 50th, Earth Day!; Sounding Off from the Editor; Letters to the Editor; How I Value My Interagency Working Opportunities with Federal Agencies; On the Road to a National Wildfire Agency: Part III; What Happened?; Then and Now; The Jump List, Men of the '40s; Smokejumper Keep the Flame Legacy Jump List; Recording Smokejumper History; Paradise with a Wind Chill-Part II; A UFO Story; Margarita Phillips Memorial Project by the TRAMPS; A Day in the Lake ...


Ethno-Medicinal Survey For Some Wild Plants Of Muzaffarabad, Azad Jammu & Kashmir, Pakistan, Ramiz Raja, Tasveer Zahra Bokhari, Shakil Ahmad, Saeed Ahmad Malik, Kausar Hussain, Kashif Nadeem 2020 Botany Division, Institute of Pure & Applied Biology Bahauddin Zakariya University Multan 81818app手机版下载

Ethno-Medicinal Survey For Some Wild Plants Of Muzaffarabad, Azad Jammu & Kashmir, Pakistan, Ramiz Raja, Tasveer Zahra Bokhari, Shakil Ahmad, Saeed Ahmad Malik, Kausar Hussain, Kashif Nadeem

Journal of Bioresource Management

Wild plants have always held economic, nutritional and medicinal value for human beings. Present work is the study of local information of some wild plants being used for remedial purposes in District Muzaffarabad, Azad Jammu and Kashmir, Pakistan. The indigenous knowledge of local conventional uses was collected through survey and personal interviews during field trips. A total of 50 plant species were identified by taxonomic description using field guides and locally by medicinal knowledge of people living in the area. About 150 informers were interviewed randomly to record local names and ethno-medicinal uses of different plant species.


Fostering Climate Change Resilience: A Socio-Ecological Forest Systems Approach, Alyssa R. Soucy 2020 University of Maine

Fostering Climate Change Resilience: A Socio-Ecological Forest Systems Approach, Alyssa R. Soucy

Electronic Theses and Dissertations

As climate change continues to impact socio-ecological systems, those that rely on natural resources are highly sensitive to climatic changes. Maine’s forest industry provides for the economic and social well-being of many residents and is especially vulnerable to climate change impacts. Changes in growing season length and timing, forest health threats imposed by insects and pathogens, extreme weather events, shifting forest composition, and changes in natural disturbance severity and frequency have already begun, and are projected to continue, to impact forest systems in the Northeastern U.S. While climate change presents a threat to forest systems, opportunities also arise ...


Foliage Type Controls Mercury Input, Storage, And Release In The Boreal Forest, Madelaine J R Anderson 2020 The University of Western Ontario

Foliage Type Controls Mercury Input, Storage, And Release In The Boreal Forest, Madelaine J R Anderson

Electronic Thesis and Dissertation Repository

Mercury (Hg) is a naturally occurring element with a complex biogeochemical cycle. Forests act as net sinks for both carbon (C) and Hg as foliage accumulates Hg with time. Litterfall represents a main input of C and Hg into forest soils. My aim was to investigate how foliage type (coniferous, deciduous) governs the input of Hg into forests with a field-based study that measured Hg accumulation over a growing season, and then investigate the storage and release of Hg from foliar tissues into soil with a laboratory-based incubation experiment. Results from the field-based study demonstrate deciduous leaves have more linear ...


Mammals Of Cedar Breaks National Monument, S. Nicole Frey, Natalie D'Souza, Ethan Hammer, Bryan Larsen, Jake Nielson 2020 Utah State University 81818app手机版下载

Mammals Of Cedar Breaks National Monument, S. Nicole Frey, Natalie D'Souza, Ethan Hammer, Bryan Larsen, Jake Nielson

All Current Publications

81818app手机版下载This document is the result of a study of the terrestrial mammals found at Cedar Breaks National Monument from 2017-2019. During this time, we conducted a survey of mammals using a series of trail cameras. We used survey results to provide an index of terrestrial mammals (excluding bats) within the park. Our goal is to provide a beginner’s guide to the mammals at Cedar Breaks National Monument. We include information regarding appearance, diet, habitat, and population status according to the International Union for the Conservation of Nature (IUCN). The guide represents the species a visitor to Cedar Breaks National ...


The Impacts Of Prescribed Burning And Mechanical Thinning On Insect Communities In The Arkansas Ozarks, Aaron P. Tormanen 2020 Arkansas Tech University 81818app手机版下载

The Impacts Of Prescribed Burning And Mechanical Thinning On Insect Communities In The Arkansas Ozarks, Aaron P. Tormanen

Theses and Dissertations from 2020

Insects are important in woodland ecosystems due to their role as pollinators and as prey for bats. My research investigated the relationships between forest management, vegetation, and insects in the Ozark National Forest in Arkansas. I selected 30 stands burned at varying frequencies in the last 12 years. Twelve of these stands were burned and mechanically thinned, 12 were only burned, and 6 were untreated. I deployed blacklight traps and malaise traps in each stand monthly from mid-March to mid- November 2019. Over 42,391 insects were collected, and Lepidoptera was the most abundant order. Insects were dried, weighed, and ...


Forest Landscape Structure Influences The Cyclic‐Eruptive Spatial Dynamics Of Forest Tent Caterpillar Outbreaks, Louis‐Etienne Robert, Brian R. Sturtevant, Daniel Kneeshaw, Patrick M. A. James, Marie‐Josée Fortin, Peter T. Wolter, Philip A. Townsend, Barry J. Cooke 2020 Université de Montréal 81818app手机版下载

Forest Landscape Structure Influences The Cyclic‐Eruptive Spatial Dynamics Of Forest Tent Caterpillar Outbreaks, Louis‐Etienne Robert, Brian R. Sturtevant, Daniel Kneeshaw, Patrick M. A. James, Marie‐Josée Fortin, Peter T. Wolter, Philip A. Townsend, Barry J. Cooke

Natural Resource Ecology and Management Publications

81818app手机版下载A fundamental question in forest insect ecology is the role of forest landscape structure, particularly the amount and spatial configuration of host tree species, in shaping the dynamics of recurring forest insect outbreaks. For forest tent caterpillar (FTC), independent studies do not converge on a singular conclusion, although all indicate that forest structure influences outbreak dynamics. These studies also vary in how they treat climate as a covariate. We evaluated the relative importance of host forest landscape composition and configuration, as well as climate, for their influence on FTC outbreak cycling in the twentieth century. We predicted that FTC outbreaks ...


Carbon Sequestration In A Restored West Michigan Oak Savanna: Implications For Management Practices, Jeffrey A. Heise 2020 Grand Valley State University

Carbon Sequestration In A Restored West Michigan Oak Savanna: Implications For Management Practices, Jeffrey A. Heise

Masters Theses

The savanna system is an ecosystem (i.e. a transitional ecosystem) that lies between forest and grassland ecosystems. They occur across the world in various forms, but in the North American Midwest they are specifically oak savannas: systems where the open overstory is dominated by various species of oak (Quercus spp.) and the understory consists of carbon-rich prairie grasses and forbs. This ecosystem is a highly degraded ecosystem and has lost almost 99% of its former range due to agriculture and fire suppression. Since savannas are fire-evolved systems, they are maintained by and require fire as a regular disturbance to ...


A Preliminary Investigation Of The Impact Of Forest Management Practices On Microhabitat Abiotic Variables In The Southern Appalachian Mountains, Jasmine Williamson, Allison Bailey, Jacob Lougee, David Patterson, Jessica Patterson 2020 University of North Georgia 81818app手机版下载

A Preliminary Investigation Of The Impact Of Forest Management Practices On Microhabitat Abiotic Variables In The Southern Appalachian Mountains, Jasmine Williamson, Allison Bailey, Jacob Lougee, David Patterson, Jessica Patterson

Georgia Journal of Science

81818app手机版下载Existing research has demonstrated that forest management practices (e.g., clear-cutting, planting) can dramatically impact animal communities. This is particularly the case with amphibian populations due to their sensitivity to microhabitat alterations. However, few studies have investigated the manner by which forest management practices impact the abiotic variables most relevant to healthy amphibian populations. In this study we investigated how spatially localized forest management practices (i.e., at the scale of hundreds of meters) alter the microhabitat variables that have been shown important to amphibian population distributions. We assessed the relationship between forest composition and microhabitat abiotic variables across three ...


Aspen Next Generation: Conversations From Southern Colorado And Northern New Mexico, Dan Binkley, Bill Romme 2020 Northern Arizona University

Aspen Next Generation: Conversations From Southern Colorado And Northern New Mexico, Dan Binkley, Bill Romme

Aspen Bibliography

81818app手机版下载Aspen trees and forests are especially important in the Rocky Mountains. Aspens add beauty to landscapes, foster high diversity and productivity of understory plants, provide for the habitat needs of many species of animals, and moderate fire behavior. There is a perception that aspen trees and stands are not regenerating well in southern Colorado and northern New Mexico; cohorts of trees younger than a few decades are scarce, at least in some areas. The next generation of aspen in the southern Rockies will be influenced by land use decisions, including harvesting, fire policy and management, and browsing by livestock and ...


Large-Diameter Trees Dominate Snag And Surface Biomass Following Reintroduced Fire, James A. Lutz, Soren Struckman, Tucker J. Furniss, C. Alina Cansler, Sara J. Germain, Larissa L. Yocom, Darren McAvoy, Crystal A. Kolden, Alistair M. S. Smith, Mark E. Swanson, Andrew J. Larson 2020 Utah State University 81818app手机版下载

Large-Diameter Trees Dominate Snag And Surface Biomass Following Reintroduced Fire, James A. Lutz, Soren Struckman, Tucker J. Furniss, C. Alina Cansler, Sara J. Germain, Larissa L. Yocom, Darren Mcavoy, Crystal A. Kolden, Alistair M. S. Smith, Mark E. Swanson, Andrew J. Larson

Wildland Resources Faculty Publications

81818app手机版下载The reintroduction of fire to landscapes where it was once common is considered a priority to restore historical forest dynamics, including reducing tree density and decreasing levels of woody biomass on the forest floor. However, reintroducing fire causes tree mortality that can have unintended ecological outcomes related to woody biomass, with potential impacts to fuel accumulation, carbon sequestration, subsequent fire severity, and forest management. In this study, we examine the interplay between fire and carbon dynamics by asking how reintroduced fire impacts fuel accumulation, carbon sequestration, and subsequent fire severity potential. Beginning pre-fire, and continuing 6 years post-fire, we tracked ...


The Ecological Value Of Spruce Plantations In Massachusetts, Calvin Ritter 2020 University of Massachusetts Amherst

The Ecological Value Of Spruce Plantations In Massachusetts, Calvin Ritter

Masters Theses

The establishment of monoculture plantations of exotic tree species is common practice for supplementing native timber stocks. Such plantations typically provide inferior habitat for wildlife compared to native forest, which may result in a net reduction in biodiversity. However, some studies report that plantations may increase net biodiversity at the landscape scale by introducing novel habitats or supplementing existing natural forests. Using point count surveys, I examined six mature Norway spruce (Picea abies81818app手机版下载) plantations in western Massachusetts in 2016 and 2017 to evaluate bird use of these habitats relative to native forest stands. Count data were analyzed using N-mixture models ...


Floodplain Forest Regeneration Dynamics In The Lower Mississippi River Alluvial Valley, Whitney Anne Kroschel 2020 Louisiana State University and Agricultural and Mechanical College

Floodplain Forest Regeneration Dynamics In The Lower Mississippi River Alluvial Valley, Whitney Anne Kroschel

LSU Doctoral Dissertations

Floodplain forest species diversity is driven, in part, by variation in disturbance regime. Flood patterns create heterogeneity in microsite quality from small differences in elevation across a floodplain which, in turn, influence flood timing and duration. Differences in species’ regeneration niches in relation to hydrologic patterns can account for long-term coexistence of various species. In the past century floodplain forests have exhibited a wide range of changes in stand development and species composition as a result of altered hydrology in rivers and floodplains. I evaluated the role of regeneration in floodplain forest systems of the Lower Mississippi River Alluvial Valley ...


Smokejumper Magazine, July 2020, National Smokejumper Association 2020 Eastern Washington University 81818app手机版下载

Smokejumper Magazine, July 2020, National Smokejumper Association

Smokejumper and Static Line Magazines

This issue of the National Smokejumper Association (NSA) Smokejumper Magazine contains the following articles: Message from the President; Notes from the Ranks; Part I: Canopies Over the Kandik; A National Wildfire Agency: Part II; Smokejumpers and Rappelers in Russia; Managing Forests Properly Is the Key to Preserving These Treasures; Aggressive Forest Management: Why Do We Avoid It?; Wildfire Trends in the US and Adaptation; The Challenge: To Manage Wildfires or Aggressively Put Them Out; It's Time To Get Serious About Utilizing Our Aerial Firefighting Fleet; Letters; Poor Management, Questionable Laws - We’re Paying for Them Now; Citizens Do Not ...


Retention Forestry Influences Understory Diversity And Functional Identity, Miranda T. Curzon, Christel C. Kern, Susan C. Baker, Brian J. Palik, Anthony W. D’Amato 2020 Iowa State University

Retention Forestry Influences Understory Diversity And Functional Identity, Miranda T. Curzon, Christel C. Kern, Susan C. Baker, Brian J. Palik, Anthony W. D’Amato

Natural Resource Ecology and Management Publications

81818app手机版下载In recent decades, a paradigm shift in forest management and associated policies has led to greater emphasis on harvest practices that retain mature, overstory trees in forest stands that would otherwise be clear-cut. While it is often assumed that the maintenance of compositional and structural complexity, such as that achieved through retention forestry approaches, will also mitigate negative impacts to functional diversity, empirical evidence of this relationship is sparse. We examined the effects of an aggregated retention system on taxonomic and functional diversity in a regenerating aspen-dominated forest. Sampling was conducted along transects arranged to capture the transition from harvested ...


Are We Producing Society-Ready Foresters? A Quantitative Content Analysis Of Graduate-Level Forestry Curriculum, Jacqueline Meyer 2020 University of Central Florida

Are We Producing Society-Ready Foresters? A Quantitative Content Analysis Of Graduate-Level Forestry Curriculum, Jacqueline Meyer

The Pegasus Review: UCF Undergraduate Research Journal (URJ)

Forestry education in the United States has been hailed for its ability to provide students with the scientific and technical skills needed for a career in forestry as much as it has been criticized for ignoring social dimensions of the discipline. Its inability to adapt curriculum to the increasingly multidisciplinary nature of the forestry profession has led to stagnant or decreasing enrollment and lack of student diversity in recent years. While forestry education and curriculum has been thoroughly analyzed at the undergraduate level, no such analysis exists for graduate curriculum. This study analyzes the course content of 40 graduate-level forestry ...


Utah Land Management Evaluation And Assessment Network Needs Assessment, Jordan Smith 2020 Utah State University 81818app手机版下载

Utah Land Management Evaluation And Assessment Network Needs Assessment, Jordan Smith

All Current Publications

81818app手机版下载It can be difficult to make and implement land management decisions that are informed by the best available science, satisfy different stakeholders, and are compliant with established policies and regulations. Local, state, and federal entities with the capacity to influence land management decisions, can benefit from an understanding of the shared needs of landowners and managers. This needs assessment reports on the shared information, funding, and research needs expressed by land managers and owners throughout Utah who make decisions about: (1) fire prevention and suppression; (2) livestock grazing; (3) fisheries; or (4) wildlife. The report provides a high-level assessment of ...


Coastal Taxodium Distichum Growth Responses To Marine Influences And Stand Density, Stephanie Moothart 2020 Louisiana State University and Agricultural and Mechanical College

Coastal Taxodium Distichum Growth Responses To Marine Influences And Stand Density, Stephanie Moothart

LSU Master's Theses

Ecological processes controlling transition areas of coastal wetlands between marshes (not forested) and swamps (forested) are poorly understood, despite important ecosystem services provided and strong interest in managing for ecosystem structure and function. The objective of this work was to identify how soil chemistry and stand density control individual-tree growth of the important coastal species baldcypress (Taxodium distichum (L.) Rich.) and pondcypress (Taxodium distichum var. imbricarium (Nutt.) Croom) along a coastal salinity gradient. Tree cores, soil samples, and stand density measurements were collected for sixty cypress trees at the coastal Joyce Wildlife Management Area, Louisiana, which is a former forested ...


Flooding, Landslides, Wildfires, Air Pollution, And Income: Risk In California, Brittany Bondi, Alyssa J. Kaewwilai 2020 Gettysburg College

Flooding, Landslides, Wildfires, Air Pollution, And Income: Risk In California, Brittany Bondi, Alyssa J. Kaewwilai

Gettysburg Social Sciences Review

California is infamously known for its likelihood of environmental hazards such as flooding, landslides, air pollution, and forest fires which can be attributed to the natural climate of the area as well as anthropologically influenced climate change. Air pollution also poses potential threats and dangers to the civilians of California as increasing populations and uses of fossil fuels continue to contribute to the growing issue of climate change. The goal of this study was to examine and analyze the geospatial trends environmental hazards in California such as landslides, air pollution, flooding, and forest fires. A weighted test, zone and slope ...