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.
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Showing 1 to 20 of 27 for “"Vegetation productivity"”.
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Soil based vegetation productivity modeling for a northern Michigan surface mining region
ABSTRACTSOIL BASED VEGETATION PRODUCTIVITY MODELING FOR A NORTHERN MICHIGAN SURFACE MINING REGIONByDustin L. CorrThe proliferation of mined landscapes and concern for the environmental impacts associated with these lands have led to an increased interest in developing empirical predictive models to …
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Soil Influence on Forest Vegetation Productivity and Patterns in the Eastern Cascades of Southern Oregon
Soils influence vegetation and can critically affect forest restoration results. Areas with similar parent materials can have changes in soil and vegetation across a slope, aspect, slope position, microtopography, and elevation. The objective of this project was to assess what soil characteristics …
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Trends in vegetation productivity and seasonality for Namaqualand, South Africa between 1986 and 2011: an approach combining remote sensing and repeat photography
This thesis presents an assessment of vegetation change and its drivers across a subset of Namaqualand, South Africa. Namaqualand forms part of the Succulent Karoo biome, which is characterised by exceptionally high species biodiversity but which has undergone severe transformation since the …
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Plant productivity and diversity in coastal wetlands in Mississippi – impact of hydrological extremes
… Spillway openings in Louisiana, US, affected vegetation productivity and diversity in salt marshes on the neighboring Mississippi Gulf Coast, US. My study area is two estuarine systems that differ in their proximity to the Bonnet Carré Spillway, elevation, and salinity including Hancock County …
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Drought Monitoring with Remote Sensing Based Land Surface Phenology Applications and Validation
… persistent drought conditions that have impacted vegetation communities and local water resources. The focus of this work is achieving a better understanding of the impact of drought on the lands of the Hopi Tribe and Navajo Nation, situated in the Northeastern corner of Arizona. This research …
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Long-term Vegetation Change Before and After Converting from Livestock farming to Game Ranching in Asante Sana Game Reserve, South Africa
… by domestic livestock with associated loss in vegetation productivity and subsequent soil erosion. After 1996 game ranching was adopted in the reserve, with observed positive results on vegetation productivity. This thesis investigates the long-term (1987-2017) spatial and temporal change in …
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Coastal Wetland Dynamics Under Sea-level Rise and Wetland Restoration in the Northern Gulf of Mexico using Bayesian Multilevel Models and a Web Tool
… loss in the NGOM, driven by relative RSLR, vegetation productivity, tidal range, coastal slope, and wave height – all interacting with river-borne sediment availability, indicated by hydrological regimes. These interactions have not been comprehensively investigated before. I further …
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Understanding Carbon Uptake Using Multi-Scale Novel Remote Sensing Techniques
… can be used to monitor multiple aspects of vegetation dynamics as well as its sensitivity to climate to improve dryland carbon uptake estimations. The thesis integrated existing cutting-edge remote sensing proxies to reduce uncertainties in dryland carbon uptake estimations from global to …
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Spatial and Seasonal Patterns of Above- and Belowground Vegetation Biomass and Potential Drivers in the Pascagoula River Delta, MS
… the effects of inundation and nitrogen on vegetation productivity using a field-sampling approach and an <em>in situ</em> controlled mesocosm experiment, called a marsh organ. The West Channel of the Pascagoula River contained significantly higher belowground biomass than the East Channel, …
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Modeling Best Management Practices on Flow and Sediment using the Rangeland Hydrology and Erosion Model
… effects of erosion and sedimentation on soil vegetation productivity and water quality. This study used the Rangeland Hydrology and Erosion Model (RHEM) to evaluate best management practices in the estimation of runoff and sediment yield on the Ash Creek Watershed located in western South …
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Investigating the Influence of Interannual Precipitation Variability on Terrestrial Ecosystem Productivity
… on above-ground terrestrial ecosystem productivity in the Hulunbuir ecosystem, using time series analysis, regression analysis, and machine learning models. The study's primary goal was to enhance our understanding of the effects of precipitation variability on ecosystems and develop …
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Mesocarnivores in Protected Areas: ecological and anthropogenic determinants of habitat use in northern Kwa-Zulu Natal, South Africa
… richness was found to decline with increased vegetation and leopard abundance but increased towards the edge of PAs. Variation in species richness estimates decreased significantly with vegetation productivity and domestic dog abundance. Together these results suggest that (1) the edges may …
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How rewilding impacts ecosystem health in a semi-arid region
… elephant, rhino, and buffalo will alter soil and vegetation characteristics as well as dung beetle assemblages via megafauna trampling and feeding behaviours, ultimately improving ecosystem health. This was conducted in two different vegetation types, Montagu Shale Renosterveld and Western Klein …
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The effect of bush clearing on soil respiration in north-central Namibia: Cheetah conservation fund and Erichsfelde
Changes in vegetation or land use that affects soil respiration are a major concern for global climate change. Bush clearing in north-central Namibia has been used as a solution to problems of bush encroachment. However, the effect of bush clearing on soil processes, such as the carbon cycle and …
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Study on Regional Responses of Pan-Arctic Terrestrial Ecosystems to Recent Climate Variability Using Satellite Remote Sensing
… inputs to assess annual terrestrial net primary productivity (NPP) for the pan-Arctic basin and Alaska from 1983 to 2005. I developed a satellite remote sensing based evapotranspiration (ET) algorithm using GIMMS NDVI with the above meteorology inputs to assess spatial patterns and temporal …
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Study on Regional Responses of Pan-Arctic Terrestrial Ecosystems to Recent Climate Variability Using Satellite Remote Sensing
… inputs to assess annual terrestrial net primary productivity (NPP) for the pan-Arctic basin and Alaska from 1983 to 2005. I developed a satellite remote sensing based evapotranspiration (ET) algorithm using GIMMS NDVI with the above meteorology inputs to assess spatial patterns and temporal …
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Modeling grassland productivity through remote sensing products
… ecosystem process model in order to simulate productivity for the mixed grassland ecosystem in the landscape level. Data used includes 4-years of field measurements and diverse satellite data (System Pour l’Observation de la Terre (SPOT) 4 and 5, Landsat TM and ETM, Advanced Very High …
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Topografian, maaperän ja geomorfologian vaikutukset putkilokasvien biomassan vaihteluun oroarktisella tunturikankaalla
Climate change is predicted to cause changes in vegetation productivity and biomass in northern areas. Understanding the factors affecting biomass helps us to estimate the future changes in plant communities and the amount of carbon stored in vegetation. In this thesis I examine the effects of soil …
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Vegetation dynamics in a semi-arid freshwater wetland: a measure for restoration success
… anthropogenic activities, which affect wetlands’ vegetation development and their ability to offer ecosystem services. The need to understand vegetations’ natural regeneration, in previously degraded wetlands of semi-arid regions is essential to measure restoration success. Nylsvley freshwater …
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A comparative analysis of plant response parameters : to the Los Angeles aqueduct systems in the Mojave Desert, California
… questions, how did the Mojave Desert perennial vegetation respond to a utility construction, such as the Los Angeles aqueduct, and what is the intensity of damage to plant cover. The recovery rates for vegetation reestablishment is another interesting area, with great heuristic value.</p> …
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