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 87 for “"Seed bank"”.
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SEED BANK DYNAMICS WITHIN A METAPOPULATION FRAMEWORK: A STUDY OF AN ANT-DISPERSED SPECIES
… past disturbance, affect the distribution of the seed bank of an early-succession species? Do these factors ultimately influence above-ground subpopulation persistence within a metapopulation framework?<strong></strong></p> <p><strong>Location. </strong>Granite-gneiss outcrops within mixed …
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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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Land Use and Topography Impacts on Rangeland Soil Seed Bank Composition on Standing Rock Indian Reservation
… Rock Indian Reservation by utilizing the seeds stored naturally in the soil seed bank. The objectives of this study were: 1) to determine if the composition of the soil seed bank in native prairie rangeland grazed historically by bison differs from the composition of the soil seed bank in …
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Characterising four Cowpea (Vigna unguiculata (L.) Walp.) Mozambican landraces deposited in a seed bank for drought tolerance
… currently deposited in the Mozambican gene bank. Results of this study showed that tested Mozambican cowpea landraces have a different degree of drought tolerance with one Mozambican cowpea landrace, Timbawene moteado, better performing under drought conditions. In particular, plants of this …
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Role of seed mixes, biochar soil amendment, and the soil seed bank in improving Palouse Prairie restoration
… the most effective restoration approach. Annual seeds and soil organic matter are important for succession and soil moisture, but their roles are unknown for Palouse prairie restoration. Additionally, the soil seedbank of the Palouse ecoregion is widely unknown but could provide insight into …
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Riparian vegetation and the soil seed bank five years after dam removal on the Elwha River, Washington
… dams on the Elwha, and 2) examine how the soil seed bank relates to riparian landforms and location above and below the former dam sites. To do this I surveyed plant species richness, community composition, and soil seed bank species richness and seed abundance on three riparian landforms (bars, …
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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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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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The soil seed bank in Agathis australis (D. Don) Lindl. (kauri) forests of northern New Zealand and its potential role in secondary successions
The soil seed bank in Agathis australis (D. Don) Lindl. (kauri) forests of northern New Zealand is quantified, and its potential role in secondary successions examined. Seed bank data from a number of kauri forest sites stratified by successional time and distance from forest edges are summarized …
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Diversity and tree neighborhood effects on the growth dynamics of European beech and the stand seed bank in temperate broad-leaved forests of variable tree diversity
… meiner Dissertation mit Analysen der Bodensamenbank sowie dendrochronologischen Untersuchungen in temperaten Laubwäldern des Nationalparks Hainich (Thüringen, Deutschland).Ich konzentriere mich dabei auf drei Haupthypothesen: i) die Artidentität von benachbarten Bäumen und ihre funktionellen …
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Biological control affects native vegetation and recovery potential in Theodore Roosevelt National Park, North Dakota
… agent Aphthona spp. and examined in-situ seed bank potential to predict recovery of native species. Extant vegetation and seed bank species richness, diversity, composition and community similarities were evaluated in leafy spurge infested, infested leafy spurge sites that received …
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Tillage effects on soil physical properties, weed seed distribution in soil and shifts in species
… bulk density, soil water characteristics, weed seed distribution in soil, and shifts in species. The experiment included a corn-soybean rotation with both crop grown each year. For this study, only the corn crop was considered. The tillage systems for corn consisted of fall chisel plow followed …
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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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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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Responses of Above- and Belowground Forb and Plant Species Diversity to Grazing Exclusion and Fire in the Northern Great Basin Sagebrush Steppe
… and long-term grazing excluded areas, using soil seed bank and aboveground cover attributes in order to provide insight into ecological potentials of sagebrush sites in the northern Great Basin.Based on soil texture, elevation, species richness and composition of the seed bank in burned areas at …
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THE FEASIBILITY OF CHAPARRAL RESTORATION ON TYPE-CONVERTED SLOPES
… annual grasses; (2) compare the success of seeding or planting native seedlings as a means of restoration; (3) analyze the soil seed bank to determine if there was a relict native species seed bank on site; (4) test the field application of smoke-water as a technique to manipulate the soil’s …
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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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