Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"Enhanced vegetation index"”.
-
Relationships between tree rings and Landsat EVI in the Northeast United States
… in temperate forests. Remotely sensed vegetation indices provide spatially extensive measures of vegetation activity, and the Enhanced Vegetation Index (EVI) has been widely linked to photosynthetic activity of vegetation. Networks of tree ring width (TRW) chronologies provide …
-
Assessment of environmental and anthropogenic factors that affect movement of sedentary blue wildebeest (Connochaetes taurinus) in the Kalahari region of Botswana
… closer to water and pan habitats and for lower Enhanced Vegetation Index (EVI) values (P < 0.05). Selection differed by time of day and season and individuals also displayed unique differences. Ultimately, these results highlight the importance of incorporating individual variation within …
-
Isolating the observed influence of vegetation variability of La Plata River basin on the climate of South America
… and quantify the local and remote influences of vegetation on the climate of South America using observational records. We find that the dominant mode of vegetation variability over the La Plata River basin in austral Spring is linked with warmer temperature and enhanced precipitation over …
-
Upland grassland agri-environment impacts on invertebrate biodiversity
… on some functional groups. The remotely-sensed Enhanced Vegetation Index (EVI) data suggested agri-environment scheme semi-improved grasslands were the least variable in terms of productivity and subsequently the most stable grasslands studied.<br/><br/>Results suggest invertebrate web structure …
-
Long-term dynamics of forest phenology across the central hardwoods
… In this project, I used 40 years of Enhanced Vegetation Index (EVI) values from Landsat multispectral imagery to model spatially explicit estimates of phenological transition dates under a Bayesian hierarchical framework. From these estimates, I additionally measured long-term trends …
-
Remote Sensing Methods To Classify a Desert Wetland
… areas. The most important factor controlling vegetation density was fire. The second significant (P<0.01) factor controlling NDVI was flow rate of agricultural drain water from the U.S. into the marsh. Reduced summer flows in 2001 due to canal repairs, and in 2010 during the YDP test run, …
-
Understanding changes in plant productivity using EVI satellite data in Tswalu Kalahari Reserve
… plant productivity, but other key drivers of vegetation dynamics, such as herbivory and fire, are usually considered to have a relatively minor impact. The main purpose of this study was to characterise the spatial and temporal pattern in plant productivity in the 100 000 hectare Tswalu …
-
From Hyperspectral Indices to Global Fluorescence: PACE Vegetation Indices as Predictors of Terrestrial Photosynthesis
… Color Instrument and globally distributed Land Vegetation Index (LANDVI) product suite. This study's primary contribution lies in demonstrating that PACE vegetation indices alone can reliably predict SIF from global retrievals obtained using data from the Copernicus Sentinel-5P Tropospheric …
-
Analysis of Dryland Forest Phenology using Fused Landsat and MODIS Satellite Imagery
… data fusion products to the analysis of dryland vegetation phenology. The objective of the first study was to verify the quality of the output products of the spatial and temporal adaptive reflectance fusion method (STARFM) over the dryland Arizona study site. Synthetic 30 m resolution images …
-
Ecosystem Net Primary Production Responses to Changes in Precipitation Using an Annual Integrated MODIS EVI
… productivity (ANPP) with precipitation using the enhanced vegetation index (EVI) from satellite data as surrogate for ANPP was assessed. To use EVI as a proxy for ANPP we extracted the satellite data from areas with uniform vegetation in a 2x2 km area for the multi-site approach.In the multi-site …
-
Urbanization as if people mattered: why the rural urbanization-industrialization complex does not bring its promised welfare impact--three alternative explanations
… areas predicts the incidence of poverty. Using enhanced vegetation index (EVI), I classify land satellite imageries to evaluate land-cover changes in Salatiga, Indonesia and visualize the rural urbanization process. Using spatial regression techniques, I find that urbanization rate was not …
-
Determining habitat and biotic factors driving puma (<i>Puma concolor</i>) space use and underlying dynamic processes (colonization and extinction) over 20 years in protected and private areas throughout Belize, Central America
… was mostly affected by distance to roads, enhanced vegetation index (EVI), and elevation, with variable directionality depending on site. In single season modeling, Occupancy increased at lower elevations and intermediate EVI in one site, and closer to water sources at another, while in …
-
Mapping and monitoring forest cover changes in Lao PDR using remote sensing
… phenology of tropical forests and related vegetation types, which has been little studied. Improved understanding of the phenology of tropical forests and other land covers involved in forest clearance and land use change is an important step towards the use of remote sensing to identify …
-
Industrial hemp agronomic management for grain, fiber, and forage
… mounted with multispectral sensors. Red/Blue index (R2=0.89), near-infrared (NIR) band (R2=0.84) and Enhanced vegetation index (EVI) (R2=0.81) were better predictors of N content in leaf samples than other vegetation indices that were evaluated. Green normalized difference vegetation index …
-
Environmental change and soil organic carbon storage in a dust emission hotspot, Free State, South Africa
… Moderate Resolution Imaging Spectroradiometer Enhanced Vegetation Index (MODIS EVI) was used to assess vegetation cover for the site of the start of dust. MODIS EVI indicated that vegetation plays a significant role during the occurrence of atmospheric dust. Sparse vegetation (EVI ranging from …