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 20 for “"Soil seed banks"”.
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Effect of isolation on the composition of soil seed banks on the Atherton Tableland, northeast Queensland, Australia
… rehabilitation management is through the soil seed bank. The composition and recruitment pattern of seeds in the soil seed bank may offer information on species that have the potential to germinate in rehabilitated sites following a disturbance. This knowledge is useful to predict future …
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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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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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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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Vegetation Ecology and Fire Effects on Community Structure, Composition, and Diversity in a Barrens Remnant and a Flatwoods in Southern Illinois
… increase 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 …
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Spatial Patterns of Herbaceous and Woody Recruitment in a Recently Restored Mixed Tidal Regime Freshwater Wetland
… differences between extant species cover and soil seed banks across restored and natural wetland habitats and (3) assess geospatial patterns to develop a GIS model of bald cypress (Taxodium distichum L.) recruitment. The two most common native colonizing species during 2009, 2010 and 2011 …
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Relationship between seed dormancy and persistence of seeds of annual ruderal species in the soil seedbank
Knowledge related to seed persistence in soil is critical for weed control decisions in the integrated weed management systems. Many annual weed species have dormant soil seed banks (SSBs), and this may be an important mechanism for seed persistence in these species. Although the relationship …
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Grazing Management and Plant Community Composition on Bodmin Moor
… Six provides the first description of the soil seed banks on Bodmin Moor and determined that seed availability was not limiting the rehabilitation of dwarf-shrub cover. Chapter Seven utilised an existing monitoring scheme on Bodmin Moor North SSSI to identify vegetation changes associated …
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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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Leveraging the Landsat Archive to Track Understory Evergreen Shrub Expansions in the Coweeta Basin, North Carolina
… forests because of their abilities to modify soil seed banks, regulate light, and alter the local soil chemistry. This study documented evergreen shrub expansion across the Coweeta Creek basin over the past 36 years analyzing changes in winter greenness using harmonized multi-decadal archives …
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Plant communities along Irish roads: the impact of humans and potential to improve biodiversity
The vegetation, soil nutrients and soil seed banks of road verges (located along a national road scheme in the south of the Republic of Ireland) were examined along with their adjacent fields plus reference points in the non-road landscape. In addition, a controlled experiment was undertaken to …
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The relationships between forest and mountain fynbos communities in the southwestern Cape Province of South Africa
… in adjacent fynbos shrublands. However, soil moisture has not been demonstrated as the controlling factor. Succession to forest has been observed in some areas and not all forest trees in the fynbos are killed in some fires. This thesis determines whether forest and fynbos communities are …
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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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Impact of fire in the taiga of southeastern Manitoba on wildlife, vegetation, and value to resource users
… with numerous light-weight wind-disseminated seeds, or those with Long-lived seeds stored in soil seed banks, which grow and mature rapidly were present. Frugivores are also suspected to have been an agent of post-fire seed dispersal. Vegetative reproduction through root sprouting or suckering …
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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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Potential for the restoration of lowland and wet grassland upon ex-arable land
… study. An investigation to determine whether soil seed banks of former, and extant, floodplain grasslands could contribute to the restoration of floristic diversity concluded that propagule availability was likely to be a major constraint on restoration and recreation of wet grassland as seed …
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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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Conserving living landscapes: investigating the impacts of livestock grazing and assessing rangeland restoration potential in Overberg Renosterveld, South Africa
… namely cattle and sheep, on biodiversity, the soil seed bank, and the restoration potential of renosterveld vegetation from resting the veld. The effect of livestock grazing by sheep and cattle on plant species richness and diversity and growth form diversity was assessed using Modified …
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A multi-scale exploration of the drivers and implications of germination strategy in Australian alpine plants
… largely be dependent on the ability of their seeds to germinate, establish and reproduce in situ, or after dispersal to new sites. The effects of climate change on regeneration from seeds may be influenced by intrinsic factors such as seed longevity (how long seeds remain viable and able to …
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A multi-scale exploration of the drivers and implications of germination strategy in Australian alpine plants
… largely be dependent on the ability of their seeds to germinate, establish and reproduce in situ, or after dispersal to new sites. The effects of climate change on regeneration from seeds may be influenced by intrinsic factors such as seed longevity (how long seeds remain viable and able to …