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 20 of 84 for “"Vegetation dynamics"”.
-
Fire disturbance and vegetation dynamics : analysis and models
… zur Rolle natürlicher Störungen in der Vegetation bzw. in Ökosystemen zeigen, dass natürliche Störungen ein essentielles und intrinsisches Element in Ökosystemen darstellen, substanziell zur Vitalität und strukturellen Diversität der Ökosysteme beitragen und Stoffkreisläufe sowohl auf …
-
Palaeoecology and vegetation dynamics in the Cederberg wilderness area
… used to link changes with land use history. A vegetation survey of the site focussed on the grass component of the vegetation. The largest impacts on vegetation during the last 2300 years are due to grazing and agriculture during the 1800s to 1940. Fire-sensitive taxa have not declined, apart …
-
The role of vegetation dynamics in the climate of West Africa
… variability. This study investigates the role of vegetation dynamics in shaping the low-frequency variability of the climate over West Africa. A zonally symmetric, synchronously coupled biosphere-atmosphere model (ZonalBAM) which includes explicit representation of vegetation dynamics has been …
-
Monitoring vegetation dynamics in Zhongwei, an arid city of Northwest China
… China to quantify the urbanization and revegetation processes (1990-2011) through a unified sub-pixel measure of vegetation cover. Research strategies included: (1) Conduct sub-pixel vegetation mapping (1990, 1996, 2004, and 2011) with Random Forest (RF) algorithm by integrating high …
-
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 …
-
Vegetation Dynamics of an Old-growth Mixed Mesophytic Forest in Southeastern Ohio, USA
Documenting change in the composition and structure of forest communities is important for understanding the distribution and abundances of natural resources, carbon pools, and species. Here, results are presented from the second sampling effort at Dysart Woods, an old-growth, mixed-mesophytic …
-
The role of nurse plants in the vegetation dynamics of the succulent Karoo
Little is known about the vegetation dynamics of the Karoo region of South Africa. The aim of this study was to focus on the role of the "availability of suitable space" in the regeneration of Succulent Karoo vegetation. By undertaking a series of manipulative experimental transplants and pattern …
-
Long-term monitoring of vegetation dynamics in the Goegap Nature Reserve, Namaqualand, South Africa
… project was initiated to record possible vegetation changes under the reduced grazing pressure. The first monitoring was done in 1974 when two line transects, of 1 km each, were surveyed. These surveys have been repeated annually covering a period of more than 30 years. When the reserve …
-
Holocene floodplain vegetation dynamics and sea-level change in the lower Aire valley, Yorkshire
… the factors influencing floodplain and vegetational development.Reconstruction of environmental change in the lower Aire valley in the mid- to late-Holocene is based on lithological and palaeoecological records from three sites in the upper, middle, and lower parts of the study reach. …
-
The development of a spatial explicit agent-based modelling framework to explore past vegetation dynamics
… modelling suite integrating individual tree dynamics and human interaction from prehistory. Adopting approaches used for contemporary woodlands, primarily forest succession models, these are applied to prehistoric landscapes with change determined by human management, climate change and …
-
Examining Drivers of Post-Wildfire Vegetation Dynamics Across Multiple Scales Using Time-Series Remote Sensing
… satellite data for describing post-fire vegetation trends at sites in the US, Spain, and Israel. Time-series data effectively described post-fire trends, and reference sites were valuable for differentiating between post-fire effects and other environmental factors. The use of …
-
Modelling vegetation dynamics and their feedbacks over Southern Africa in response to climate change forcing
The importance of vegetation feedbacks to the atmosphere has been highlighted in many recent research studies. The influence of climate on vegetation has long been established, and climate has regularly been used to predict vegetation distribution. However, the influence of vegetation on climate is …
-
Understanding the Role of Vegetation Dynamics and Anthropogenic induced Changes on the Terrestrial Water Cycle
… extremes accurately. Seasonal variability in vegetation growth and human-driven land cover changes (LCC) can alter the biophysical properties of the land surface, which can in turn influence the water cycle. We quantified the impacts of seasonal variability in vegetation growth on land surface …
-
Spatial and temporal variations in soil and vegetation dynamics on stabilized desert dunes in Ningxia, China
The dynamics of vegetated dune stabilization were investigated at two field stations of the Institute of Desert Research, Academia Sinica, during the summers of 1993 and 1994. The majority of research was conducted at Shapotou Research Station, where an area of dunes, representing a 37 year …
-
Relative influence of temperature and disturbance on vegetation dynamics in the Low Arctic : an investigation at multiple scales.
… disturbance. Since the structure of northern vegetation influences global climate, understanding both temperature and disturbance effects on vegetation is critical. Here, I investigate the influence of temperature and disturbance on Low Arctic vegetation at several spatio-temporal scales in …
-
Post-fire carbon, fuels, and vegetation dynamics in wet temperate forests: implications for future fire and management in the Pacific Northwest
Forecasting ecosystem dynamics under warming climate and increasing fire activity is a critical priority for contemporary ecology and ecosystem management. However, fundamental understanding of fire effects is missing in ecosystems where fire is infrequent, including wet temperate forests west of …
-
Time series analysis of vegetation dynamics and burn scar mapping at Smoky Hill Air National Guard Range, Kansas using moderate resolution satellite imagery
… to be having a negative effect on the overall vegetation condition. It was also discovered that BFAST was able to accurately detect known vegetation disturbances. BFAST is a viable environmental management tool if the limitations are understood.
-
The impacts of indigenous herbivore grazing over five years (2004 - 2008) on vegetation dynamics in four distinct vegetation types of the winter-rainfall Little Karoo
Vegetation in semi-arid regions is subject to change when heavily utilised by herbivores. Changes in species richness, species and growth form composition, total cover and plant palatability in response to rest (fenced) and grazing (open) treatments was investigated in Sanbona Wildlife Reserve over …
Page 1 of 5