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Full-Text Articles in Natural Resources and Conservation

Nanomaterials In The Environment, Human Exposure Pathway, And Health Effects: A Review, Arindam Malakar, Sushil R. Kanel, Chittaranjan Ray, Daniel D. Snow, Mallikarjuna N. Nadagouda Jan 2021

Nanomaterials In The Environment, Human Exposure Pathway, And Health Effects: A Review, Arindam Malakar, Sushil R. Kanel, Chittaranjan Ray, Daniel D. Snow, Mallikarjuna N. Nadagouda

Daugherty Water for Food Global Institute: Faculty Publications

Nanomaterials (NMs), both natural and synthetic, are produced, transformed, and exported into our environment daily. Natural NMs annual flux to the environment is around 97% of the total and is significantly higher than synthetic NMs. However, synthetic NMs are considered to have a detrimental effect on the environment. The extensive usage of synthetic NMs in different fields, including chemical, engineering, electronics, and medicine, makes them susceptible to be discharged into the atmosphere, various water sources, soil, and landfill waste. As ever-larger quantities of NMs end up in our environment and start interacting with the biota, it is crucial to understand …

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Baseflow Nitrate Dynamics Within Nested Watersheds Of An Agricultural Stream In Nebraska, Usa, Galen Richards, Troy E. Gilmore, Aaron R. Mittelstet, Tiffany Messer, Daniel D. Snow Jan 2021

Baseflow Nitrate Dynamics Within Nested Watersheds Of An Agricultural Stream In Nebraska, Usa, Galen Richards, Troy E. Gilmore, Aaron R. Mittelstet, Tiffany Messer, Daniel D. Snow

Daugherty Water for Food Global Institute: Faculty Publications

There is a need to evaluate high surface nitrate concentrations across agricultural watersheds, both spatially and temporally, to increase understanding of source and timing of nitrogen loads in streams and rivers. Bazile Creek is a high-nitrate stream originating in the agriculturally intensive Bazile Groundwater Management Area of Eastern Nebraska, USA. It is a gaining stream that receives groundwater with high nitrate concentrations originating from nonpoint sources. The objective of this study was to determine spatial and temporal variability of baseflow nitrate concentrations in Bazile Creek and its tributaries and to relate this variability to watershed characteristics. Surface-water nitrate samples were …

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Surveillance Of Plasticizers, Bisphenol A, Steroids And Caffeine In Surface Water Of River Ganga And Sundarban Wetland Along The Bay Of Bengal: Occurrence, Sources, Estrogenicity Screening And Ecotoxicological Risk Assessment, Paromita Chakraborty, Nancy W. Shappell, Moitraiyee Mukhopadhyay, Sathaporn Onanong, Daniel D. Snow Jan 2021

Surveillance Of Plasticizers, Bisphenol A, Steroids And Caffeine In Surface Water Of River Ganga And Sundarban Wetland Along The Bay Of Bengal: Occurrence, Sources, Estrogenicity Screening And Ecotoxicological Risk Assessment, Paromita Chakraborty, Nancy W. Shappell, Moitraiyee Mukhopadhyay, Sathaporn Onanong, Daniel D. Snow

Daugherty Water for Food Global Institute: Faculty Publications

The transboundary River Ganga serves as a conduit for meltwater from the Himalayas and is a major freshwater source for two thirds of Indian population before emptying into the Sundarban Delta, the largest estuary in the Bay of Bengal. Endocrine disrupting compounds (EDCs) such as phthalic acid esters (PAEs) and bisphenol A (BPA) used as organic plastic additives can pollute the aquatic environment receiving plastic litter. Hence, we have investigated these EDCs in water samples from Ganga and Sundarban wetland of India. Since these compounds exhibit estrogenic potential, we have further measured steroids and evaluated the estrogenic activity (estradiol equivalents, …

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Transmission Routes Of The Microbiome And Resistome From Manure To Soil And Lettuce, Yuepeng Sun, Daniel D. Snow, Harkamal Walia, Xu Li Jan 2021

Transmission Routes Of The Microbiome And Resistome From Manure To Soil And Lettuce, Yuepeng Sun, Daniel D. Snow, Harkamal Walia, Xu Li

Daugherty Water for Food Global Institute: Faculty Publications

The land application of animal manure can introduce manure microbiome and resistome to croplands where food crops are grown. The objective of this study was to characterize the microbiome and resistome on and in the leaves of lettuce grown in manured soil and identify the main transmission routes of microbes and antibiotic resistance genes (ARGs) from soil to the episphere and endosphere of lettuce. Shotgun metagenomic results show that manure application significantly altered the composition of the microbiome and resistome of surface soil. SourceTracker analyses indicate that manure and original soil were the main source of the microbiome and resistome …

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Understanding The Effects Of Complex Topography On Cover Crop Dynamics And Maize Production In Kentucky Agroecosystems, Samuel John Leuthold Jan 2021

Understanding The Effects Of Complex Topography On Cover Crop Dynamics And Maize Production In Kentucky Agroecosystems, Samuel John Leuthold

Theses and Dissertations--Plant and Soil Sciences

In Central Kentucky, rolling hill cropland presents a number of challenges related to soil sustainability. Increased topographic complexity can lead to increased erosion, inefficient crop nutrient use and increased nutrient loss. Further, grain crop yields can be variable across both space and time in rolling hill fields and are less resilient to changes in weather conditions than flatter, more homogeneous areas. More than 30% of cropland in Kentucky has a slope greater than 3⁰, which means a large swath of the row crop production land in the state is at increased risk of contribution to soil and water resource degradation. …

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"Prophet", Terry A. Messmer Jan 2021

"Prophet", Terry A. Messmer

Human–Wildlife Interactions

This is the letter from the editor-in-chief.

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An Investigation Of Endangered And Threatened Plants Using Phylogenomics, Phylogenetic Metrics, And Geography To Prevent Species Loss, Phyllis H. Pischl Jan 2021

An Investigation Of Endangered And Threatened Plants Using Phylogenomics, Phylogenetic Metrics, And Geography To Prevent Species Loss, Phyllis H. Pischl

Graduate Research Theses & Dissertations

The conservation of endangered and threatened plant species plays an integral part of preserving biodiversity. Loss of habitat is one of the main reasons that plants become endangered or threatened. In Illinois much of the native habitat has been lost to the conversion of industry, agriculture and urban areas. The goals of this dissertation are to 1) determine where endangered and threatened species are finding habitats in relation to land use, 2) produce a robust phylogeny of endangered and threatened species of grasses and apply phylogenetic diversity analysis to better understand the plight of these species, and 3) use climate …

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Fly On The Wall: Comparing Arthropod Communities Between Islands With And Without House Mice (Mus Musculus), Wieteke A. Holthuijzen Jan 2021

Fly On The Wall: Comparing Arthropod Communities Between Islands With And Without House Mice (Mus Musculus), Wieteke A. Holthuijzen

Graduate Research Theses & Dissertations

Invertebrates are key to island ecosystems but impacts from invasive mammalian predators are not well documented or understood. Given this knowledge gap, we studied terrestrial arthropod communities in the presence of a common invasive rodent (house mice, Mus musculus) on a subtropical atoll—Midway Atoll National Wildlife Refuge (MANWR). Here, invasive mice recently began to attack and depredate nesting seabirds, prompting a mouse eradication. Although eradication planning efforts are underway, uncertainty remains regarding the ecosystem’s response to mouse removal. As part of a pre-eradication investigation, we conducted a baseline survey of MANWR’s arthropod community structure and diversity, comparing islands with and …

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Species Selection And Plantation Management In Enrichment Planting With Native Timber Species In The Panama Canal Watershed, Abigail A. Marshall Jan 2021

Species Selection And Plantation Management In Enrichment Planting With Native Timber Species In The Panama Canal Watershed, Abigail A. Marshall

Graduate Student Theses, Dissertations, & Professional Papers

Large areas of the Panama Canal Watershed have been converted to monocultures of teak (Tectonia grandis), a non-native timber species that is generally not providing hoped-for economic and ecological benefits of Forest Landscape Restoration. Enrichment planting offers a potential strategy for revitalizing these underperforming plantations through the addition of high-value, native species to the understory, but more information is needed to guide implementation and management in this region and other tropical areas. I assessed the performance of six promising native species (B. crassifolia, D. retusa, D. oleifera, H. alchorneoides, P. pinnatum, T. amazonia) as an enrichment …

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Transboundary Marine Management In The Sulu-Sulawesi Seascape, Lindsey G. Ellett Jan 2021

Transboundary Marine Management In The Sulu-Sulawesi Seascape, Lindsey G. Ellett

Graduate Student Theses, Dissertations, & Professional Papers

Transboundary conservation aims to facilitate environmental conservation and management at the ecosystem level by operating across political boundaries, through the cooperation of two or more countries. Though there is increased interest and advocation for transboundary conservation initiatives around the world, there remains a limited understanding of how they function on-the-ground. Within this study, I address these gaps in knowledge through two phases of research, both focusing on the Sulu-Sulawesi Seascape as a case study site. Phase I involved a policy analysis of Indonesian, Malaysia, and Philippine policies related to fisheries, coastal zones and protected areas, and environmental quality. Through this …

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Policy And Collaborative Governance: Case Studies Of Three Wildlife Crossings, Nicholas Maya Jan 2021

Policy And Collaborative Governance: Case Studies Of Three Wildlife Crossings, Nicholas Maya

Graduate Student Theses, Dissertations, & Professional Papers

Over the last several decades, the number of wildlife-vehicle collisions in North America has significantly increased, driving substantial loss of human life and wildlife and economic costs. The most effective wildlife-vehicle collision mitigation is wildlife crossing structures (undercrossings and overcrossings), with some studies suggesting they can reduce wildlife-vehicle collisions by 97% when paired with wildlife exclusion fencing. However, cost, funding, jurisdiction, land ownership, and local support are limiting factors in constructing these crossing structures. This paper presents case studies of three crossing projects in Snoqualmie, Washington, Teton County, Wyoming, and Summit County, Colorado, to illustrate the similarities and differences in …

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Distribution Of Green Spaces In Omaha, Nebraska, Sofia Gavia Jan 2021

Distribution Of Green Spaces In Omaha, Nebraska, Sofia Gavia

Department of Environmental Studies: Undergraduate Student Theses

The distribution of parks often depends on the races, ethnicity, and socioeconomic class of a community’s households. Parks and green spaces provides community residents recreational opportunities, economic benefits, and improves community public health. The unequal distribution of parks and green spaces in a city is a social issue found across the country. Limited research has been done on the relationship between green spaces and park access and social justice in Omaha, Nebraska. This study discusses whether there is a difference in how parks are distributed in Omaha, NE in terms of social justice and equitable distribution. Research is done using …

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Analysis Of Drinking Water Disinfection Options, Bryce Carlen Jan 2021

Analysis Of Drinking Water Disinfection Options, Bryce Carlen

Department of Environmental Studies: Undergraduate Student Theses

This thesis utilizes existing research to provide a framework that can be used for community and disaster planning. It analyses the critical process of water disinfection for drinking water. It focuses on chemical, distillation, and ultraviolet treatments in both centralized and point-of-use treatment. This thesis aims to provide a method for communities to determine the optimal water treatment, utilizing a framework based on weighted criteria. The decision-making framework is an easy-to-use and flexible process that communities can tailor for their specific needs to find the optimal treatment relative to their needs. In this study’s generalized example, ultraviolet treatment and distillation …

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Audit Of Waste Collected Over One Week From Superior Dental Health Of Lincoln, Bryclin Alstrom Jan 2021

Audit Of Waste Collected Over One Week From Superior Dental Health Of Lincoln, Bryclin Alstrom

Department of Environmental Studies: Undergraduate Student Theses

A waste audit of Superior Dental Health of Lincoln was conducted in order to propagate the implementation of sustainable waste management practices within the company. Differentiating between hazardous waste and solid waste is necessary for environmentally friendly waste management and ceasing the spread of infectious pathogens. The audit identified nine different materials contributing to the biomedical waste stream of the company. Of which, personal protective equipment (PPE) is of major concern due to the financial commitment necessary to acquire / dispose of these products, as well as the strain in supply due to the current COVID-19 pandemic. The results of …

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Long-Term Impacts Of 2019 Flood Experiences On Nebraskans’ Climate Change Perceptions, Caitlin Kingsley Jan 2021

Long-Term Impacts Of 2019 Flood Experiences On Nebraskans’ Climate Change Perceptions, Caitlin Kingsley

Department of Environmental Studies: Undergraduate Student Theses

This study examines climate change perceptions in Nebraskans who experienced or witnessed flooding in March 2019. The purpose is to determine the impacts of 2019 flood experiences on Nebraskans’ climate change perceptions. The objectives are to determine the influence of flood proximity on changes in climate change perceptions, determine whether 2019 flooding had long-term impacts on Nebraskans’ climate change perceptions, and determine the influence of personal background factors on perceptions. A three-phase interview was utilized to collect background information, climate change perceptions, 2019 flood experiences, and relationships between 2019 flood experiences and climate change perceptions. Background information and climate change …

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The Effect Of Urban Forests On Air Quality And Human Health, Chance Wilken Jan 2021

The Effect Of Urban Forests On Air Quality And Human Health, Chance Wilken

Department of Environmental Studies: Undergraduate Student Theses

Following the industrial revolution, the impacts of climate change have been increasingly impactful on both rural and urban populations around the world. As population density and urbanization increase throughout the globe, the influences of climate change will continue to play a dangerous role in its influence on people's lives. Due to negative health impacts on humans and the economic costs in cities, climate change is one of the most important issues to understand in the 21st century. Air quality and human health are two components of climate change that are impacted most significantly. The bulk of this work is to …

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Designing A Mobile App And Online Directory To Increase The Visibility Of Environmental Organizations In A Community, Kayla Vondracek Jan 2021

Designing A Mobile App And Online Directory To Increase The Visibility Of Environmental Organizations In A Community, Kayla Vondracek

Department of Environmental Studies: Undergraduate Student Theses

Concern for environmental degradation, natural resource depletion, and public health has long been a necessary part of a strongly developed and sophisticated society. Humans are primarily responsible for the depletion of the natural environment as it supplies the commodities required to ensure the long-term survival of civilizations. As cultures continue to evolve, so does the practice of land stewardship and protection of resources. With the necessary expansion of industry and housing needed to support a rising human population, the management of natural resources, pollution control, and the environment has become increasingly important to people worldwide. Bernstein and Szuster (2019) suggest …

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Investigating Predation Risk Experienced By Wintering Birds At A Supplied-Food Garden, Madison Smart Jan 2021

Investigating Predation Risk Experienced By Wintering Birds At A Supplied-Food Garden, Madison Smart

Department of Environmental Studies: Undergraduate Student Theses

Wintering birds are particularly susceptible to predation while foraging at feeders. The ‘starvation vs. predation’ survival trade-off is felt most acutely in winter because energy demands are higher compared to milder seasons. This study investigated sense of predation risk experienced by members of a wintering mixed-species flock. The objective was to determine which species take on increased predation risk in order to forage at feeders, and if there was bias for one species over another. A raptor (experimental) and non-raptor (control) model were presented to a mixed-flock at feeders within Pioneers Park Nature Center. The first species to return to …

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Precipitation Impact On Crop Yield, Ian Ritchie Jan 2021

Precipitation Impact On Crop Yield, Ian Ritchie

Department of Environmental Studies: Undergraduate Student Theses

Climate change is a massive force impacting and changing many weather trends, including precipitation rates. This thesis will study the relationship between crop yield and changes in precipitation. Understanding crop yield is important in determining overall crop supply every year as well as crop prices. Many factors can have either a negative or a positive impact on crop yields. One of these many factors is precipitation. This thesis looks directly at the impacts of changes in precipitation on corn yield in Iowa from 1991-2020. To do this, a regression analysis was performed to compare changes in yearly precipitation rates for …

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On The Acceptance Of Urban Beavers In Martinez, California, Zane A. Eddy Jan 2021

On The Acceptance Of Urban Beavers In Martinez, California, Zane A. Eddy

Cal Poly Humboldt theses and projects

As ecosystem engineers, beavers construct complex riparian and wetland habitats that benefit many other species, including endangered salmonids. Through their landscape alterations, beavers also promote increased groundwater recharge and provide refugia during wildfires and high flow events by impounding water and allowing it to spread across the landscape. Prior to the North American colonial fur trapping campaigns, there were between 60 and 400 million beavers in North America. By the beginning of the 20th century, beavers were extirpated from many parts of the continent, however through human efforts, their population has since rebounded to between 10 and 15 million. The …

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Evaluation Of A Low-Cost Uas And Phenocams For Measuring Grapevine Greenness, Timothy J. Hoheneder Jan 2021

Evaluation Of A Low-Cost Uas And Phenocams For Measuring Grapevine Greenness, Timothy J. Hoheneder

Graduate Theses, Dissertations, and Problem Reports (ETD)

Unpersoned aerial systems (UAS) could provide winegrowers with the potential to monitor vineyard productivity with ultra-high-resolution imagery and low operational costs. This ability could prove particularly valuable in the challenging cool-climate viticultural areas of Appalachia. Especially in this mountainous region of increasingly variable microclimates, there could be of great value from an ability to use UAS-measured greenness to monitor wine grape phenology and predict harvest quality and quantity. In this study, I assess how UAS-measured greenness relates to three complementary measures of field-based: leaf angle measurements, phenocam measured greenness, and leaf spectral measurements of greenness. After correlating these field-based measures …

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Ecology Of Freshwater Turtles And Other Wetland Wildlife In A North-Central West Virginia Watershed, Darien N. Lozon Jan 2021

Ecology Of Freshwater Turtles And Other Wetland Wildlife In A North-Central West Virginia Watershed, Darien N. Lozon

Graduate Theses, Dissertations, and Problem Reports (ETD)

The goal of wetland mitigation in the United States is to achieve a no-net-loss of wetlands; however, mitigated wetlands must be monitored to ensure wetland function is comparable to natural wetlands. In this study, relationships between land use practices and freshwater turtle abundance, wetland connectivity, and heavy metal bioaccumulation were investigated. In Chapter 1, a summary of pre-restoration species abundance and diversity is provided for anurans, birds, benthic macroinvertebrates, fishes, small mammals, plants, and turtles in riparian wetlands along Ruby Run, a tributary of Deckers Creek in north-central West Virginia, USA. These data provide a baseline for comparison after mitigation …

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Satellite-Based Phenology Analysis In Evaluating The Response Of Puerto Rico And The United States Virgin Islands' Tropical Forests To The 2017 Hurricanes, Melissa Collin Jan 2021

Satellite-Based Phenology Analysis In Evaluating The Response Of Puerto Rico And The United States Virgin Islands' Tropical Forests To The 2017 Hurricanes, Melissa Collin

Cal Poly Humboldt theses and projects

The functionality of tropical forest ecosystems and their productivity is highly related to the timing of phenological events. Understanding forest responses to major climate events is crucial for predicting the potential impacts of climate change. This research utilized Landsat satellite data and ground-based Forest Inventory and Analysis (FIA) plot data to investigate the dynamics of Puerto Rico and the U.S. Virgin Islands’ (PRVI) tropical forests after two major hurricanes in 2017. Analyzing these two datasets allowed for validation of the remote sensing methodology with field data and for the investigation of whether this is an appropriate approach for estimating forest …

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Examining West Virginia's Economic Development: Natural Resources, Development Agencies, And Labor Force Development, Gaillynn Marie Bowman Jan 2021

Examining West Virginia's Economic Development: Natural Resources, Development Agencies, And Labor Force Development, Gaillynn Marie Bowman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Examining West Virginia's Economic Development: Natural Resources, Development Agencies, and Labor Force Development Gaillynn Bowman Economic development is well-recognized as being fundamental to facilitating an overall improved quality of life for communities and their residents. Throughout West Virginia’s history, the state has experienced economic hardships caused by boom and bust cycles associated with resource extraction. This dissertation consists of three essays that explore the impacts of economic development activities, including conservation programs, economic development agency initiatives, and workforce development agencies. The first essay explores the relationship nonresident landowners have with the conservation programs within West Virginia, specifically the Natural Resources …

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Recovery Of Phosphorus From Florida Phosphatic Waste Clay, Amir Eskanlou Jan 2021

Recovery Of Phosphorus From Florida Phosphatic Waste Clay, Amir Eskanlou

Graduate Theses, Dissertations, and Problem Reports (ETD)

This MS thesis examines the recovery of phosphorus (P) from Florida waste clay (WC). A comprehensive literature review revealed that: (i)-The most important values being lost to WC are P and rare earth elements (REEs). For the recovery of these values from WC, two crucial attempts are the removal of extremely fine-sized clays, followed by the recovery of phosphate content, which can pave the path for the recovery of REEs; (ii)-Any scientific/ technological solution should, at the same time, be economically and environmentally attractive to the industry. As such, moving from mostly chemical separation processes to the primarily physical/ physicochemical …

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Lack Of Plasticity In Gopher Tortoise (Gopherus Polyphemus) Nesting Behavior And Fecundity In A Translocated Population, Jennifer N. Desha Jan 2021

Lack Of Plasticity In Gopher Tortoise (Gopherus Polyphemus) Nesting Behavior And Fecundity In A Translocated Population, Jennifer N. Desha

College of Graduate Studies: Theses & Dissertations

Lack of Plasticity in Gopher Tortoise (Gopherus polyphemus) Nesting Behavior and Fecundity in a Translocated Population

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Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne Jan 2021

Optimisation Of Retrofit Wall Insulation: An Irish Case Study, Rakshit D. Muddu, D M. Gowda, Anthony James Robinson, Aimee Byrne

Articles

Ireland has one of the highest rates of emissions per capita in the world and its residential sector is responsible for approximately 10% of total national CO2 emissions. Therefore, reducing the CO2 emissions in this sector will play a decisive role in achieving EU targets of reducing emissions by 40% by 2030. To better inform decisions regarding retrofit of the existing building stock, this study proposes Optimum Insulation Thicknesses (OIT) for typical walls in 25 regions in Ireland. The calculation of OIT includes annual heat energy expenditure, CO2 emissions, and material payback period. The approach taken is based on Heating …

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Comparison Of Low-Cost Commercial Unpiloted Digital Aerial Photogrammetry To Airborne Laser Scanning Across Multiple Forest Types In California, James Edward Lamping Jan 2021

Comparison Of Low-Cost Commercial Unpiloted Digital Aerial Photogrammetry To Airborne Laser Scanning Across Multiple Forest Types In California, James Edward Lamping

Cal Poly Humboldt theses and projects

Science-based forest management requires quantitative information about forest attributes traditionally collected via sampled field plots in a forest inventory program. Remote sensing tools, such as active three-dimensional (3D) Light Detection and Ranging (lidar), are increasingly utilized to supplement and even replace field-based forest inventories. However, lidar remains cost prohibitive for smaller areas and repeat measurement, often limiting its use to single acquisitions of large contiguous areas. Recent advancements in unpiloted aerial systems (UAS), digital aerial photogrammetry (DAP) and high precision global positioning systems (HPGPS) have the potential to provide low-cost time and place flexible 3D data to support forest inventory …

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Using Uav And Traditional Remote Sensing Data To Detect Vegetation Vigor And Monitor Stream Morphology In A Desert Riparian Ecosystem, Jordan Bradley Adair Jan 2021

Using Uav And Traditional Remote Sensing Data To Detect Vegetation Vigor And Monitor Stream Morphology In A Desert Riparian Ecosystem, Jordan Bradley Adair

Cal Poly Humboldt theses and projects

Mono Lake is a terminal lake in the Eastern Sierra Nevada Mountains. The streams that feed Mono Lake support a unique desert riparian ecosystem. Rush Creek was the stream of interest for this study. The objective of this research is to determine if remotely sensed imagery can be used to determine vegetation vigor and measure stream morphologic features in a desert riparian area. The goals were to evaluate different sources of remotely sensed imagery to make these determinations. The Normalized Difference Vegetation Index (NDVI) was used to monitor vegetation vigor along Rush Creek. Google Earth imagery and UAV derived imagery …

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A Look At Land Cover Classification Methods In Northern California With The Use Of High Spatial Resolution Geospatial Data, Lucila Corro Jan 2021

A Look At Land Cover Classification Methods In Northern California With The Use Of High Spatial Resolution Geospatial Data, Lucila Corro

Cal Poly Humboldt theses and projects

Land use and land cover (LULC) mapping plays a vital role in understanding the state of the world, showing us a visual representation of the natural and anthropogenic features covering our planet. Northern California in the United States is home to many critical habitats that provide for a variety of endemic and some threatened and engendered species, making it an area of particular concern to better understand and monitor. There is a greater need to identify specific methods for vegetation modeling in Northern California due to its unique species; to do this we examined two case studies with the following …

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