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Abstract (from http://onlinelibrary.wiley.com/doi/10.1002/eap.1389/full): Woody plant encroachment and overall declines in perennial vegetation in dryland regions can alter ecosystem properties and indicate land degradation, but the causes of these shifts remain controversial. Determining how changes in the abundance and distribution of grass and woody plants are influenced by conditions that regulate water availability at a regional scale provides a baseline to compare how management actions alter the composition of these vegetation types at a more local scale and can be used to predict future shifts under climate change. Using a remote-sensing-based approach, we assessed the balance between grasses and woody plants...
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These data are a species-level classification map of riparian vegetation in the Colorado River riparian corridor in Grand Canyon, Arizona, USA. The classification is derived from 0.2 m pixel resolution multispectral aerial imagery acquired in May 2013. The classification spans the riparian zone of the river corridor between Glen Canyon Dam near Page, Arizona, and Lake Mead at Pearce Ferry, Arizona. The classification is divided into 5 distinct reaches of the river: Glen Canyon, Marble Canyon, Eastern Grand Canyon, Western Grand Canyon upstream of Diamond Creek, and Western Grand Canyon downstream of Diamond Creek. The method used for classification was a combination of supervised Classification And Regression Tree...
Tags: Arizona,
Botany,
Colorado River,
Diamond Creek,
Ecology, All tags...
Geography,
Glen Canyon,
Glen Canyon Dam,
Glen Canyon National Recreation Area,
Grand Canyon,
Grand Canyon National Park,
Information Sciences,
Lake Mead,
Lake Powell,
Lees Ferry,
Little Colorado River,
Marble Canyon,
National Canyon,
Pearce Ferry,
Remote Sensing,
USGS Science Data Catalog (SDC),
aerial photography,
botany,
decision support methods,
geospatial datasets,
image analysis,
image mosaics,
invasive species,
land use and land cover,
multispectral imaging,
native species,
plants (organisms),
regression analysis,
remote sensing,
scientific interpretation,
spatial analysis,
streamflow,
vegetation, Fewer tags
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These data are satellite image-derived, classification maps of tamarisk (Tamarisk spp.) along the Colorado River in Grand Canyon National Park from river km 315 to 363, approximately from Parashant Canyon to Diamond Creek tributaries. The classification maps are published in TIF raster format. Two maps are published: 1) a classification of healthy, defoliated, and tamarisk canopy dieback from the tamarisk beetle (Diorhabda carinulata) in May 2019, and 2 a classification of healthy and beetle-impacted tamarisk in August 2019. Tamarisk was mapped using a Spectral Angle Mapper supervised classification derived from 2 m resolution, multispectral WorldView-2 imagery, with an overall accuracy of 80.0% in May 2019 and...
Tags: Arizona,
Botany,
Colorado River,
Diamond Creek,
Diorhabda carinulata, All tags...
Ecology,
Geography,
Grand Canyon National Park,
Information Sciences,
Parashant Canyon,
USGS Science Data Catalog (SDC),
Wildlife Biology,
beetle-impacted,
biota,
canopy dieback,
change detection,
classification map,
defoliated,
ecosystem management,
ecosystem monitoring,
healthy,
remote sensing,
remote-sensing data,
remote-sensing images,
riparian vegetation,
satellite images,
supervised classification,
tamarisk,
tamarisk beetle,
tamarix,
time series,
vegetation,
vegetation change,
wetland ecosystems, Fewer tags
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Woody plant encroachment and overall declines in perennial vegetation in dryland regions can alter ecosystem properties and indicate land degradation, but the causes of these shifts remain controversial. Determining how changes in the abundance and distribution of grass and woody plants are influenced by conditions that regulate water availability at a regional scale provides a baseline to which compare how management actions alter the composition of these vegetation types at a more local scale and can be used to predict future shifts under climate change. Using a remote sensing-based approach, we assessed the balance between grasses and woody plants and how climate and topo-edaphic conditions affected their abundances...
Types: Citation;
Tags: Aridity,
Drought,
Drought, Fire and Extreme Weather,
National CASC,
Sonoran Desert, All tags...
Sonoran Desert; southern Arizona,
aridity,
climate change,
climate change,
desert,
desert,
land degradation,
land degradation,
shrub encroachment,
shrub encroachment, Fewer tags
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This data release presents data used for analyzing spatial and temporal differences in soil surface roughness within selected biocrust communities. These records were collected by ground-based lidar for 121, 1m x 3m soil plots with biological soil crusts (biocrusts). Roughness was estimated from 5 mm resolution data (CloudCompare v. 2.10.2, 2019) for two Great Basin Desert sites (UTTR-1; UTTR-2) in December 2015 and one Chihuahuan Desert site (JER) in February 2016. Data were again collected in June 2018 for UTTR-1 and UTTR-2. Additional field and laboratory data were included within this study to understand differences in soil surface roughness between UTTR and JER as well as between the 2016 and 2018 surveys at...
Categories: Data;
Tags: 5 mm resolution,
Chihuahuan Desert,
Ecology,
Geography,
Geomorphology, All tags...
Great Basin,
Great Basin Desert,
Hill Air Force Base,
Information Sciences,
Jornada Experimental Range,
Las Cruces,
New Mexico,
Remote Sensing,
Salt Lake City,
Soil Sciences,
USGS Science Data Catalog (SDC),
Utah,
biocrust,
biological soil crusts,
biological treatment,
biota,
data release,
digital point cloud,
ecosystem disturbance,
experimental restoration treatments,
field data,
field experiments,
field inventory and monitoring,
field methods,
geoscientificInformation,
ground-based lidar,
habitat alteration and disturbance,
laboratory data,
laboratory experiments,
laboratory methods,
lidar,
plot sampling,
remediation,
soil morphology,
soil plots,
soil resources,
soil surface roughness,
southwestern United States, Fewer tags
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