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 47 for “"thicket"”.
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Satellite change detection in the albany thicket biome
The Albany Thicket Biome has been subject to widespread transformation, with as much as 63% of the biome being severely degraded. The primary land use activity responsible for much of the transformation of the biome has been pastoralism and commercial agriculture land expansion (Mills et al., 2005; …
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Potential key drivers of thicket expansion in savanna
… of the increase of non-savanna (forest and thicket) vegetation within savannas. The swit9h from savanna to closed canopy thicket represents a biome switch for the system and is therefore of concern to land and conservation managers. Data on height growth, root suckering and fire damage were …
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Tracking thicket through space and time : insights into the evolutionary history of the Albany Subtropical Thicket from comparative phylogeography and distribution modelling
Albany Subtropical Thicket (AST) is a species-rich biome restricted to the coastal lowlands of the southern Cape region of South Africa. Its Quaternary history is poorly understood, but climatic changes associated with Pleistocene glacial cycles may have profoundly affected the distributions, gene …
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The impact of land use on biodiversity in xeric succulent thicket, South Africa
… and biotic communities in Xeric Succulent Thicket, a notoriously fragile and low resilience ecosystem in the Eastern Cape, South Africa. In its natural state this vegetation type is characterized by a continuous mosaic of clumps of diverse woody shrubs in a matrix of grass, hardy dwarf …
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LONG-TERM OVERSTORY VEGETATION RESPONSES TO PRESCRIBED FIRE MANAGEMENT FOR LONGLEAF PINE AT BIG THICKET NATIONAL PRESERVE
… land managers have burned the forests of Big Thicket National Preserve to bring back the structure and diversity of the longleaf pine forest. In the early 1990’s, a four year study was conducted by Rice University, and the National Park Service continued monitoring the study’s fire ecology …
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Connecting the dots: Remote sensing of Glossy and Common Buckthorn (Frangula alnus and Rhamnus cathartica) in the Oak Openings Region of Northwest Ohio
… woody shrubs that formed dense monoculture thickets in the Oak Openings Region of NW Ohio. Conventional techniques of vegetation mapping are expensive and time-consuming. Thickets were identified using remotely sensed land surface phenology of buckthorn, that leafs out earlier and senesces …
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Effects of repeated fire on the savanna / forest boundary
Savanna and forest/thicket can exist as alternate stable states, among others, determined by fire ecology feedbacks. Bush encroachment has become an ever-increasing trend converting grassland and savanna biomes to forest/thicket. A severe firestorm occurred in the Hluhluwe-Umfolozi Game Reserve in …
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The Bees of Two Sites in the Big Thicket National Preserve, Texas, with a Consideration of the Effects of a Rare Flooding Event
… the bee fauna of two sandyland sites in the Big Thicket National Preserve and assessed whether a community was impacted by a historic hurricane-induced flooding event. It was hypothesized that a change in diversity metrics would be evident following the flood. Datasets were analyzed for …
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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
… The results show that the relative area of Thicket has increased over time at the expense of Grassland and Shrubland while Bare-ground has expanded into Shrubland and Thicket. A ground-truthing exercise revealed a significant (p<0.01, R2 = 0.6) positive relationship between the vegetation …
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Seasonal and Spatial Variation in Leaf Area Index, Litter Production, and Light Levels in Myrica Cerifera,Shrub Thickets Across a Barrier Island Chronsequence
… understory light levels of Myrica cergera shrub thickets were assessed on Hog Island, Virginia to quantify spatial and seasonal variations in leaf area and light attenuation among four thickets representing a successional chronosequence and compare methods of estimating LA1 in shrub- dominated …
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Predicting the distribution of thickets and forests on the Cape Peninsula, Cape Province using linear regression analyses
Forest and thicket communities are distributed throughout fynbos. The species constituents exhibit life history characteristics significantly different from fynbos species, in that reproductive biology and recruitment are not coupled to fire. The limited occurrence of forests and thickets suggest …
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The differences in grass species composition and the effects on fire behaviour in an African mesic savanna
… and the effects that game trails surrounding thicket patches have on fire continuity and spread. From a fire perspective, fuel load and moisture content are major contributors to fire spread. Grass biomass contributing to fuel was found to differ between the two respective dominant grass …
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Pattern and process in South Coast dune fynbos : population, community and landscape level studies
… a mosaic and admixture of grassland, fynbos and thicket. A hierarchical approach directed investigations at the landscape, community and population levels, with emphasis on seed banks. The study concentrated on fynbos, the predominant vegetation type. At the landscape-level, pattern was …
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The feasibility of using remote sensing and field-based checks to monitor the impact caused by collection of wood in the Eastern Cape/Ciskei forest and thicket formations
… of wood in the Eastern Cape/Ciskei forest and thicket communities. A variety of remote sensing techniques for landcover analysis were investigated. In all cases, visual interpretation was used because it is considerably cheaper and demands less technical expertise than would computer …
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A hierarchical phytosociology of the Greater Zandvlei area
… Disturbed Parkland, Dune Asteraceous Fynbos, Thicket/Shrub Mosaic, Rhus-Euclea Dune Thicket and Homogenous Patches. CCA-ordination indicates that the abiotic soil factors sampled (texture composition, pH, carbon content and visible disturbance) explain very little of the variation between the …
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Spatial variation in small mammal communities across the Karoo Shale Gas Development Area of South Africa
… four biomes (Nama- and Succulent Karoo, Albany Thicket, Grassland) as part of the Karoo BioGaps project to augment baseline biodiversity information needed to guide proposed fracking activities in the Shale Gas Development Area (SGDA) (Holness et al. 2016). A strategic Environmental Assessment …
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Aspects of plant dispersal in the southwestern Cape with particular reference to the roles of birds as dispersal agents
… of vertebrate-dispersed plants. Coastal Thicket and Afromontane Forest were found to be the richest in these species. The colonization of vertebrate-dispersed plants was examined in an artificially cleared area of Mountain Fynbos vegetation. Enhanced densities of vertebrate-dispersed …
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Organic carbon dynamics of the Neches River and its floodplain.
… the floodplain. The Neches River in the Big Thicket National Preserve is a large blackwater river that has an extensive forested floodplain. Organic carbon was analyzed within the floodplain waters and the river (upstream and downstream of the floodplain) to determine the amount of organic …
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