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Natural Resources and Environmental Science
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The Department of Natural Resources and Environmental Science focus is to sustain natural resource and environmental security for society in a dynamic world.
Theses and Dissertations for Natural Resources and Environmental Science
Posters for Natural Resources and Environmental Science
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Use of membranes and detailed Hysplit analyses to understand particulate, gaseous oxidized, and reactive mercury chemistry
(2020)The atmosphere is the primary pathway by which Hg enters ecosystems. Despite the importance of atmospheric deposition, concentrations and chemistry of gaseous oxidized (GOM) and particulate (PBM) Hg are poorly characterized. ... -
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Effect of spatial filtering on characterizing soil properties from imaging spectrometer data.
(2017)Airborne imaging spectroscopy covering wavelength range of 0.35-2.5 ?m can be used to quantify soil textural properties and chemical constituents. In this paper, we evaluate the effects of spatial resolution on the ... -
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Spatial scale affects novel and disappeared climate change projections in Alaska
(2019)The formation of novel and disappeared climates between the last glacial maximum (LGM) and the present is important to consider to understand the expansion and contraction of species niches and distributions, as well as ... -
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Measuring landscape-scale spread and persistence of an invaded submerged plant community from airborne remote sensing.
(2016)Processes of spread and patterns of persistence of invasive species affect species and communities in the new environment. Predicting future rates of spread is of great interest for timely management decisions, but this ... -
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Effects of temporally external auxiliary data on model-based inference.
(2017)One of the benefits of model-based inference relative to design-based inference is that probability samples are not required which means that models can be constructed using data external to the area of interest. Although ... -
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Quantification of uncertainty in aboveground biomass estimates derived from small-footprint airborne LiDAR.
(2018)To address uncertainty in biomass estimates across spatial scales, we determined aboveground biomass (AGB) in Californian forests through the use of individual tree detection methods applied to small-footprint airborne ... -
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A spatialized classification approach for land cover mapping using hyperspatial imagery
(2019)Maps of classified surface features are a key output from remote sensing. Conventional methods of pixel-based classification label each pixel independently by considering only a pixel's spectral properties. While these ... -
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How much can natural resource inventory benefit from finer resolution auxiliary data?
(2018)For remote sensing-assisted natural resource inventories, the effects of spatial resolution in the form of pixel size and the effects of subpixel information on estimates of population parameters were evaluated by comparing ... -
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Use of multispectral satellite remote sensing to assess mixing of suspended sediment downstream of large river confluences
(2018)Although past work has noted that contrasts in turbidity often are detectable on remotely sensed images of rivers downstream from confluences, no systematic methodology has been developed for assessing mixing over distance ... -
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Development of methods to improve soybean yield estimation and predict plant maturity with an unmanned aerial vehicle based platform
(2016)Advances in phenotyping technology are critical to ensure the genetic improvement of crops meet future global demands for food and fuel. Field-based phenotyping platforms are being evaluated for their ability to deliver ... -
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Loxodonta Localizer: a software tool for inferring the provenance of African elephants and their ivory using mitochondrial DNA.
(2019)Illegal hunting is a major threat to the elephants of Africa, with more elephants killed by poachers than die from natural causes. DNA from tusks has been used to infer the source populations for confiscated ivory, relying ... -
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Using Automated Point Dendrometers to Analyze Tropical Treeline Stem Growth at Nevado de Colima, Mexico
(2010)The relationship between wood growth and environmental variability at the tropical treeline of North America was investigated using automated, solar-powered sensors (a meteorological station and two dendrometer clusters) ... -
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Dendroecological testing of the pyroclimatic hypothesis in the central Great Basin, Nevada, USA
(2011)In the Great Basin region of western North America, records of past climate and wildfire variability are needed not only for fire use, but also for understanding the mechanisms behind the century‐long expansion of piñon‐juniper ... -
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A watershed modeling approach to streamflow reconstruction from tree-ring records
(2008)Insight into long-term changes of streamflow is critical for addressing implications of global warming for sustainable water management. To date, dendrohydrologists have employed sophisticated regression techniques to ... -
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Inequality in Paleorecords
(2008)Paleorecords provide information on past environmental variability, and help define ecological reference conditions by means of changes in their characteristics (accumulation rate, geochemical composition, density, etc.). ... -
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North Pacific Decadal Climate Variability since 1661
(2001)Climate in the North Pacific and North American sectors has experienced interdecadal shifts during the twentieth century. A network of recently developed tree-ring chronologies for Southern and Baja California extends ... -
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Seasonal Analysis of the 2011–2017 North American Monsoon near its Northwest Boundary
(2019)The seasonal extent of the North American Monsoon (NAM) is highly variable and potentially sensitive to future climate change. Our objective was to determine how regional monsoonal patterns influence mountain precipitation ... -
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Pervasive drought legacies in forest ecosystems and their implications for carbon cycle models
(2015)The impacts of climate extremes on terrestrial ecosystems are poorly understood but important for predicting carbon cycle feedbacks to climate change. Coupled climate–carbon cycle models typically assume that vegetation ... -
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Dendroclimatic Reconstruction at Kilometer-Scale Grid Points: A Case Study from the Great Basin of North America
(2014)Preparing for future hydroclimatic variability greatly benefits from long (i.e., multicentury) records at seasonal to annual time steps that have been gridded at kilometer-scale spatial intervals over a geographic region. ...
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