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 402 for “"shrub"”.
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The effects of shrub removal and grazing on vegetation and soils in a shrub-encroached Australian woodland
… and climate. Areas heavily encroached by shrubs are generally regarded as degraded, and this view is largely based on the fact that shrubs reduce pastoral productivity. There have been many attempts to remove shrubs in pastoral systems using chemical, biological and mechanical techniques …
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Mapping shrub biomass in a boreal continental fen
… allometric equations for three dominant shrub genera found in boreal peatlands and found that equations based on shrub genus were not significantly different from a pooled equation of all shrub genera. The UAV study revealed that UAV-derived volume was the best predictor of AGB (R2=0.885) …
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Corticular Photosynthetic Dynamics for a Coastal Evergreen Shrub: Myrica Cerifera
… photosynthesis may be a mechanism to enhance shrub expansion due to increased whole plant carbon use efficiency (CUE) and water use efficiency (WUE) attributed to refixation.
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Rodent effects on shrubs in a Mojave Desert shrub community
… the Southwestern United States. I characterized shrub distribution and soil parameters on and off rodent mounds in a Coleogyne ramosissima community in Lucky Strike Canyon near Las Vegas, Nevada and performed several experiments to investigate rodent effects on seedlings and seeds of C. …
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PHYSIOLOGICAL CHARACTERIZATION ON SEED AGING OF SIX NATIVE SHRUB SPECIES
… and adequate supply of seeds of native shrubs. However, annual seed production is erratic and seeds are usually short lived and insufficient for the reclamation projects. Seeds of six native shrub species including: Prunus virginiana, Prunus pensylvanica, Arctostaphylos uva-ursi, …
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Seed and seedling ecology of two co-occurring ericoid fynbos shrub species
… 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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The response of four ericaceous shrub species to multiple environmental resource variation
… the same growth form. Four evergreen ericaceous shrubs responded individualistically to fluctuations in light and water in an experimental garden study. <i>Rhododendron maximum</i> and <i>Kalmia latifolia</i> were able to acclimate photosynthetically to high and low irradiance under both high and …
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MULTIPLE APPROACHES TO MAPPING RESISTANCE TO MELAMPSORA LEAF RUST IN SHRUB WILLOW (SALIX)
In commercial production, shrub willow grown as a biomass bioenergy crop can potentially remain in the field for more than 20 years. In these dense plantations, biotic stressors can flourish, impacting biomass yield. Among the most impactful are willow leaf rusts caused by Melampsora spp. As a …
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Arctic shrub growth responses to environmental drivers and implications for tundra community decomposition
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Ecosystem Functional Consequences of Top Predator Mortality Due to the Invasive Shrub, Lonicera maackii
<p>Lonicera maackii (Amur Honeysuckle) is an invasive woody plant species that is present across the United States. Previous studies have assessed the biotic effects of honeysuckle, as well as abiotic effects such as changes in soil chemistry, ground level light, and forest floor temperature. …
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Evaluation of shrub removal effects on understory richness and diversity in a native grassland
… treatment for wide-spread and intensive shrub encroachment in 2010. The study questions were: (1) How does shrub removal affect plant communities, both in terms of the vegetation parameters and the community trajectories, (2) Is there a legacy effect of buckthorn (Rhamnus cathartica) on …
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Testing assisted gene flow in restoration of winterfat, Krascheninnikovia lanata, a Great Basin desert shrub
… we focused on restoration of a widespread shrub, winterfat (Krascheninnikovia lanata), asking how seedling emergence and outplant seedling survival vary among 15 populations collected across both deserts. Populations were sampled across a 116,893 km2 boundary. We monitored seedling …
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IMPACTS OF RDX SOIL CONTAMINATION ACROSS AN AGE GRADIENT FOR THE NATIVE SHRUB MORELLA CERIFERA.
… behavior in the environment. I quantified shrub growth responses to 1,3,5-trinitroperhydro-1,35-triazine (RDX) soil contamination across three life stages and I hypothesized that RDX would have the greatest impact on seed germination. Morella cerifera seeds were germinated on soils amended …
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