Andrew J. Sánchez Meador
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View article: Terrestrial lidar scanning provides efficient measurements of fire-caused crown scorch in longleaf pine
Terrestrial lidar scanning provides efficient measurements of fire-caused crown scorch in longleaf pine Open
Background Fire is a dominant ecological process that influences the structure, function, and biodiversity of many ecosystems across the globe. Crown scorch is a primary predictor of tree mortality and is crucial for understanding the mech…
View article: A new geodatabase of fuel treatments across federal lands in the USA
A new geodatabase of fuel treatments across federal lands in the USA Open
Catastrophic wildfires threaten landscapes across the United States, and fuel treatments are key to mitigating this risk. Yet, information regarding when, where, and what types of treatments have occurred is scattered across multiple syste…
View article: Canopy and surface fuels measurement using terrestrial lidar single-scan approach in the Mogollon Highlands of Arizona
Canopy and surface fuels measurement using terrestrial lidar single-scan approach in the Mogollon Highlands of Arizona Open
Background Fuel monitoring data are essential to evaluate wildfire risk, plan management activities and evaluate fuel treatment effects. Terrestrial light detection and ranging (lidar) is a field-based 3D scanning technology with great pot…
View article: Eigenfeature‐enhanced deep learning: advancing tree species classification in mixed conifer forests with lidar
Eigenfeature‐enhanced deep learning: advancing tree species classification in mixed conifer forests with lidar Open
Accurately classifying tree species using remotely sensed data remains a significant challenge, yet it is essential for forest monitoring and understanding ecosystem dynamics over large spatial extents. While light detection and ranging (l…
View article: Handheld lidar sensors can accurately measure aboveground biomass
Handheld lidar sensors can accurately measure aboveground biomass Open
Many recent studies have explored remote sensing approaches to facilitate non‐destructive sampling of aboveground biomass (AGB). Lidar platforms (e.g., iPhone and iPad PRO models) have recently made remote sensing technologies widely avail…
View article: A multi-level, multi-scale comparison of LiDAR- and LANDSAT-based habitat selection models of Mexican spotted owls in a post-fire landscape
A multi-level, multi-scale comparison of LiDAR- and LANDSAT-based habitat selection models of Mexican spotted owls in a post-fire landscape Open
The increasing frequency and severity of wildfires pose significant challenges for habitat conservation, particularly in post-fire landscapes. This study evaluates the habitat selection of the Mexican spotted owl (Strix occidentalis lucida…
View article: Light patterns align with successful <i>Quercus</i> and <i>Carya</i> regeneration but reveal continued challenges in managing dry-mesic southern Appalachian upland hardwood forests
Light patterns align with successful <i>Quercus</i> and <i>Carya</i> regeneration but reveal continued challenges in managing dry-mesic southern Appalachian upland hardwood forests Open
Field experiments of gap-based silviculture have provided inconsistent evidence that these approaches are effective in regenerating shade midtolerant oaks ( Quercus spp.) and hickories ( Carya spp.) in upland deciduous forests of the south…
View article: Ecological and climatic transferability of airborne lidar-driven aboveground biomass models in Piñon-Juniper woodlands
Ecological and climatic transferability of airborne lidar-driven aboveground biomass models in Piñon-Juniper woodlands Open
Piñon-juniper (PJ) woodlands are an expansive and dynamic dryland ecosystem in the US that encompass a wide range of spatial, temporal, and ecological diversity. The dynamism of PJ woodland extent and abundance over space and time is attri…
View article: Return on investments in restoration and fuel treatments in frequent-fire forests of the American west: A meta-analysis
Return on investments in restoration and fuel treatments in frequent-fire forests of the American west: A meta-analysis Open
Arid forests in the American West contend with overly dense stands and a need to reduce fuels and restore more natural fire regimes. Forest restoration efforts include fuel treatments, such as thinning and prescribed burning, that can redu…
View article: Navigating the evolving landscape of wildfire management: A systematic review of decision support tools
Navigating the evolving landscape of wildfire management: A systematic review of decision support tools Open
Wildfires have become more frequent and intense in recent years, threatening terrestrial and aquatic ecosystems and neighboring urban communities. As a result, those responsible for managing wildland fires face increasing pressure to addre…
View article: Terrestrial 3D Laser Scanning for Ecosystem and Fire Effects Monitoring
Terrestrial 3D Laser Scanning for Ecosystem and Fire Effects Monitoring Open
Long-term terrestrial ecosystem monitoring is a critical component of documenting outcomes of land management actions, assessing progress towards management objectives, and guiding realistic long-term ecological goals, all through repeated…
View article: Data from: Eigenfeature-Enhanced Deep Learning: Advancing Tree Species Classification in Mixed Conifer Forests with Lidar
Data from: Eigenfeature-Enhanced Deep Learning: Advancing Tree Species Classification in Mixed Conifer Forests with Lidar Open
Data and code used in Lidar-derived eigenfeatures improve species classification using deep-learning in Southwestern mixed conifer forests. Lidar data is provided for UAV-LS and ALS in lidar_data.zip. Las files are named by site and plot (…
View article: Data from: Eigenfeature-Enhanced Deep Learning: Advancing Tree Species Classification in Mixed Conifer Forests with Lidar
Data from: Eigenfeature-Enhanced Deep Learning: Advancing Tree Species Classification in Mixed Conifer Forests with Lidar Open
Data and code used in Lidar-derived eigenfeatures improve species classification using deep-learning in Southwestern mixed conifer forests. Lidar data is provided for UAV-LS and ALS in lidar_data.zip. Las files are named by site and plot (…
View article: Measuring the long-term costs of uncharacteristic wildfire: a case study of the 2010 Schultz Fire in Northern Arizona
Measuring the long-term costs of uncharacteristic wildfire: a case study of the 2010 Schultz Fire in Northern Arizona Open
Background Wildfires often have long-lasting costs that are difficult to document and are rarely captured in full. Aims We provide an example for measuring the full costs of a single wildfire over time, using a case study from the 2010 Sch…
View article: A national-scale tree volume, biomass, and carbon modeling system for the United States
A national-scale tree volume, biomass, and carbon modeling system for the United States Open
The Forest Inventory and Analysis (FIA) Program of the U.S. Department of Agriculture, Forest Service conducts the national forest inventory of the United States.Although FIA assembles a myriad of forest resource information, many analyses…
View article: Refuge‐yeah or refuge‐nah? Predicting locations of forest resistance and recruitment in a fiery world
Refuge‐yeah or refuge‐nah? Predicting locations of forest resistance and recruitment in a fiery world Open
Climate warming, land use change, and altered fire regimes are driving ecological transformations that can have critical effects on Earth's biota. Fire refugia—locations that are burned less frequently or severely than their surroundings—m…
View article: Metrics and Considerations for Evaluating How Forest Treatments Alter Wildfire Behavior and Effects
Metrics and Considerations for Evaluating How Forest Treatments Alter Wildfire Behavior and Effects Open
The influence of forest treatments on wildfire effects is challenging to interpret. This is, in part, because the impact forest treatments have on wildfire can be slight and variable across many factors. Effectiveness of a treatment also d…
View article: Tree regeneration and spatial patterning among midtolerant tree species following gap-based harvesting in a temperate hardwood forest
Tree regeneration and spatial patterning among midtolerant tree species following gap-based harvesting in a temperate hardwood forest Open
Introduction Field experiments of gap-based harvest systems in temperate northern hardwood forests have provided inconsistent support for the theory that such regeneration approaches can improve regeneration success among increasingly unde…
View article: Western Spruce Budworm Effects on Forest Resilience
Western Spruce Budworm Effects on Forest Resilience Open
Western spruce budworm (Choristoneura freemani Razowski) is the most destructive defoliator of forests in the western US. Forests in northern New Mexico experienced high levels of WSBW-caused defoliation and subsequent mortality between th…
View article: Fort Valley Experimental Forest G. A. Pearson Natural Area forest restoration site: tree overstory, herbaceous understory, fuels, and repeat photographs database
Fort Valley Experimental Forest G. A. Pearson Natural Area forest restoration site: tree overstory, herbaceous understory, fuels, and repeat photographs database Open
This project, which was funded by the Joint Fire Science Program (JFSP), measured the 20+ year post-fire response of vegetation and fuels on a restoration experiment in a ponderosa pine-bunchgrass ecosystem on the Fort Valley Experimental …
View article: Evidence for widespread changes in the structure, composition, and fire regimes of western North American forests
Evidence for widespread changes in the structure, composition, and fire regimes of western North American forests Open
Implementation of wildfire‐ and climate‐adaptation strategies in seasonally dry forests of western North America is impeded by numerous constraints and uncertainties. After more than a century of resource and land use change, some question…
View article: Experiences and lessons learned from two virtual, hands-on microbiome bioinformatics workshops
Experiences and lessons learned from two virtual, hands-on microbiome bioinformatics workshops Open
In October of 2020, in response to the Coronavirus Disease 2019 (COVID-19) pandemic, our team hosted our first fully online workshop teaching the QIIME 2 microbiome bioinformatics platform. We had 75 enrolled participants who joined from a…
View article: Adjudicating Perspectives on Forest Structure: How Do Airborne, Terrestrial, and Mobile Lidar-Derived Estimates Compare?
Adjudicating Perspectives on Forest Structure: How Do Airborne, Terrestrial, and Mobile Lidar-Derived Estimates Compare? Open
Applications of lidar in ecosystem conservation and management continue to expand as technology has rapidly evolved. An accounting of relative accuracy and errors among lidar platforms within a range of forest types and structural configur…
View article: Southwestern ponderosa pine forest patterns following wildland fires managed for resource benefit differ from reference landscapes
Southwestern ponderosa pine forest patterns following wildland fires managed for resource benefit differ from reference landscapes Open
Context. Managers aiming to utilize wildland fire to restore southwestern ponderosa pine landscapes require better understanding of forest cover patterns produced at multiple scales. Restoration effectiveness of wildland fires managed for …
View article: Mid-Scale Drivers of Variability in Dry Mixed-Conifer Forests of the Mogollon Rim, Arizona
Mid-Scale Drivers of Variability in Dry Mixed-Conifer Forests of the Mogollon Rim, Arizona Open
The structure and composition of southwestern dry mixed-conifer forests have changed significantly, decreasing forest resiliency to uncharacteristic disturbances which also threaten ecosystem services. Restoration of these forests can be i…
View article: Moisture and vegetation cover limit ponderosa pine regeneration in high-severity burn patches in the southwestern US
Moisture and vegetation cover limit ponderosa pine regeneration in high-severity burn patches in the southwestern US Open
Background Fire regimes are shifting in ponderosa pine ( Pinus ponderosa Lawson & C. Lawson)-dominated forests, raising concern regarding future vegetation patterns and forest resilience, particularly within high-severity burn patches. The…
View article: EVALUATING EARLY POST-FIRE TROPICAL LOWER MONTANE FOREST RECOVERY IN INDONESIA
EVALUATING EARLY POST-FIRE TROPICAL LOWER MONTANE FOREST RECOVERY IN INDONESIA Open
Little is known about post-fire tropical montane forest succession in Indonesia.It is an important step to understand whether forests are recovering and if there is a need for reforestation or other rehabilitation efforts.This study assess…