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 51 for “"seed banks"”.
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The effect of hydroperiod on seed banks in semi-permanent prairie wetlands
… was to determine if hydroperiod affected seed pool characteristics. Additionally, 48 samples were collected in 1986 from wetland P1 to determine if seed bank composition changed annually without a change in mature vegetation. Seed bank composition was determined by placing soil samples in …
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The potential role of seed banks in the restoration of drained prairie wetlands
… was to determine trends in the composition of seed banks due to geographic location and duration of drainage and cultivation and to estimate the role of relict seed banks in restorations. Drained and undrained prairie wetlands in central Iowa, west central Minnesota, and central North Dakota …
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Seed Banks, Seed Mortality, and the Role of Fungal Communities in Neotropical Forests
… Cecropia; fungi; tropical forest ecology; seed bank; pioneer species; pathogens; ITS; Barro Colorado Island, Panama; La Selva, Costa Rica; Yasuni, Ecuador; recruitment limitation.
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Response of riparian plant communities to hydrological alteration: Are seed banks a means of restoration?
… on in situ plant community composition and seed bank composition were examined at five riparian sites in the Yazoo River watershed in northern Mississippi. This analysis was performed to determine if the soil seed bank can provide a means for the restoration of riparian floodplain plant …
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Forest floor seed banks and their response to slashburning in some forest ecosystems in south central British Columbia
Soil seed banks are part of the flora of many ecosystems, but little is known about those of temperate coniferous forests in B.C., or their response to different disturbances. As a result, a study of forest floor seed banks and their response to the common disturbances of clearcutting and …
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Mojave Desert restoration: drought and facilitation influences on plant communities and soil seed banks in annual grass invaded shrublands
… including the Mojave Desert. Their prolific seed production and rapid spread pose significant threats to native flora and wildlife habitats. These invasive grasses alter fire cycles, degrade habitats, and reduce biodiversity. In desert ecosystems, soil seed banks are critical reservoirs for …
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A comparative study of the seed bank dynamics of two congeneric alien invasive species
… is threatened by alien Acacia encroachment. The seed bank dynamics of the two most widespread invaders in the region, Acacia saligma and A. cyclops, was studied to elucidate those factors contributing most to their invasive success. This information was then used to assist in developing optimal …
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Invertebrate Egg and Plant Seed Banks in Natural, Restored, and Drained Wetlands in the Prairie Pothole Region (USA) and Potential Effects of Sedimentation On Recolonization of Hydrophytes and Aquatic Invertebrates
… on emergence of plants and invertebrates from seed and invertebrate egg banks. Additionally, I compared the seed and invertebrate egg bank composition of high quality reference wetlands (i.e., having no history of cultivation) to previously farmed nondrained, restored, and drained seasonal and …
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Restoration implications of land management on aboveground vegetation and seed bank composition of grassland communities in Illinois
… restoration efforts do not take into account the seed bank associated with these non-prairie lands as a potential source of plant diversity or weedy interference. In this study, I investigated the similarities or dissimilarities of standing vegetation and seed bank composition for six different …
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Seed and seedling ecology of two co-occurring ericoid fynbos shrub species
The seed and seedling ecology of the ericoid fynbos shrubs Passerina paleacea and Phylica ericoides were studied. These species co-occur in dune fynbos and are dependent on soil seed banks for regeneration after recurrent fynbos fires. Phylica was stimulated by the heat effect of fire. The precise …
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Seed biology of a recently introduced species, Myoporum laetum in comparison to a successful invasive alien, Acacia cyclops, in the southwestern Cape, South Africa
… evaluated, by comparing various aspects of its seed biology with those of another bird-dispersed alien, Acacia cyclops which is a successful invader in this region. M. laetum has higher annual seed production, but lower soil-stored seed banks than A. cyclops. Both experience high seed predation, …
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Is local plant extinction a product of mutualism breakdown? A case study of the Namaqualand spring flora
… breakdown and may be explained by a lack of seed banks. The model was shown to be useful for predicting distribution patterns for annuals. However, further studies of seed banks, germination cues and colonisation success are necessary to make predictions for the geophytic species. The study …
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Effect of land degradation on the above-ground vegetation and soil seed bank of a Rangeland in Kunene region Namibia
… is affecting above ground vegetation and seed bank composition, hindering their recovery. To address this issue, it is crucial to assess land conditions at different levels and develop effective strategies for restoring degraded rangeland. The understanding of how land degradation impacts …
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Characterization of urban wetland vegetation and management practices
… research focuses on the standing vegetation and seed banks of urban wetland plant communities. Urban wetlands in south-central New York had a higher percent cover of invasive species in the standing vegetation and significantly lower species richness; however, native species were also common in …
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Vegetation patterns and plant reproductive processes in the succulent Karoo
… had opportunistic life-history traits; seeds did not germinate readily and canopy seed banks were maintained. Species off heuweltjies had higher overall germination and did not maintain seed banks in the plant canopies. The differences in reproductive attributes were related to …
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Thresholds for sustainable regeneration in urban restoration plantings in Hamilton City, New Zealand
… drier and warmer climate, a prevalence of exotic seed sources and isolation from remnant native forest seed sources. This research investigates how these factors influence native species presence in different aged urban forest patches and uses life history traits to identify vulnerable species …
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Botanical processes in urban derelict spaces
… work included vegetation surveys, soil seed bank investigation, field mapping and seed rain trapping methods. Interpretation of the data involved a range of approaches including vegetation classification and ordination, comparative analysis of plant functional attributes and the …
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Vegetation Ecology and Fire Effects on Community Structure, Composition, and Diversity in a Barrens Remnant and a Flatwoods in Southern Illinois
… in species diversity appears to be from soil seed banks. At GCB the increase was among species typical for the habitat while at MVF increase in diversity included typical flatwoods species and ruderal taxa. Changes among species at GCB included a trend towards greater dominance of C3 graminoid …
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Pattern and process in South Coast dune fynbos : population, community and landscape level studies
… and population levels, with emphasis on seed banks. The study concentrated on fynbos, the predominant vegetation type. At the landscape-level, pattern was attributed to successional processes rather than abiotic factors. Each vegetation was maintained under defined disturbance regimes of …
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