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 28 for “"native grasses"”.
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Establishing Native Grasses Along Maryland Roadways
The use of native grasses and other meadow species in roadside rights-of-way is perceived as environmentally and economically beneficial. There is a need for more information about successful establishment procedures appropriate for the mid-Atlantic region. This study examined the use of companion …
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Competition and Phenology of Invasive and Native Grasses in the Northern Great Plains
… niche separation exists between invasive and native species; and (2) quantify the competitive ability of smooth brome and Kentucky bluegrass. The first objective was achieved through a common garden experiment involving phenological observations of cool-season invasive and native species. The …
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Drought Resistance and Resilience of Non-native vs. Native Grasses in the Northern Tallgrass Prairie
… Prairie of eastern South Dakota contains native prairie where the plant composition includes mostly native species as well as pasture that has been converted to or invaded by cool-season introduced species. So how are these two plant communities impacted by drought? The specific objective …
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Soil bacterial structure and function associated with the invasive grass Microsteguim vimineum and two native grasses
… assemblage could gain an advantage over native plants, enhancing its ability to invade new habitats, alter ecosystem function, and hinder efforts to reestablish native populations. Assays of enzyme activity and next generation sequencing of bacterial 16S rRNA genes were used to assess the …
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Social and ecological dimensions of non-native grass management in working landscapes
… grasslands is threatened by the dominance of non-native grasses used as cattle forage. Although controlling non-native grasses using herbicide or intensive grazing is sometimes assumed to improve habitat, it is unclear how this control impacts grassland birds or their arthro-pod prey, both taxa of …
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Landscape and population ecology of ring-necked pheasants
… effect on chick survival. Similarly, the amount native grasses within fields had a positive effect on adult survival, but a negative effect on chick survival. Still, population growth was most sensitive to increases in native grass, but peaked at intermediate amounts of native grass cover. I also …
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Quality and Yield Responses of Seven Warm Season Forage Grasses to Partial Shading in a Simulated Silvopasture in East Texas
… of seven forages, including various warm season native grasses, grown under simulated partial shading (50%) typical of a loblolly pine silvopastoral system in East Texas. In order to meet the overall objective, slatted shade structures were constructed that simulated the quantity, quality, and …
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Biodiversity impacts of Chilean needle grass Nassella neesiana on Australia’s indigenous grasslands
… examine mechanisms by which N. neesiana invades native grasslands, the impacts of invasion on vascular plant and invertebrate biodiversity and mechanisms of impact. Time series analysis of historical aerial photographs demonstrated that invasion was absent or very slow when infestations abutted …
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Plant-Soil Feedback and Perennial Forage Systems
… and management practices interact to influence native species persistence is critical for sustainable perennial forage systems. I combined a multi-year field trial with a controlled greenhouse PSF experiment to evaluate how harvest frequency and community composition influence native species …
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Status and Distribution of Franklin's and Richardson's Ground Squirrels in Eastern South Dakota
… has been altered substantially, largely due to native grasslands being converted into cropland. Over 99% of tall grass prairie and an estimated 70 to 90% of native mixed grass prairie have been lost. In addition, expiring conservation reserve program contracts and decreased government incentives …
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Mojave Desert restoration: drought and facilitation influences on plant communities and soil seed banks in annual grass invaded shrublands
Non-native grasses, like Bromus rubens, have become widespread in arid ecosystems across the western United States, 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, …
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Conversion of Exotic Cool-Season Grasslands to Restored Native Plant Communities Utilizing Herbicide Treatments
… in maintaining, rehabilitating, and restoring native plant communities. Many areas in the northern Great Plains are now dominated by exotic cool-season grasses such as smooth brome (Bromus inermis), Kentucky bluegrass (Poa pratensis), and reed canarygrass (Phalaris arundinacea). Information was …
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The effects of herbivory, competition, and disturbance on island meadows
It is an unresolved paradox that non-native species are successful in novel environments whereas native species, presumably adapted to that environment, decline. This knowledge gap has persisted because third party processes in invasion ecology have been overlooked. Ungulate densities are …
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Studies on the Biology of <i>Striga aspera</i> (Scrophulariaceae) in Nigeria
… was less widespread than S. hermonthica and native grasses growing along road borders were their common host. A new procedure developed for counting mitotic chromosomes in Striga established new chromosome counts of n = 18 for Striga aspera and n = 19 for Striga hermonthica. Hybridization …
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Relative Invertebrate Availability in Nebraska's Conservation Reserve Management Access Program
… - CP1 (predominantly cool-season introduced grasses) and CP2 (predominantly warm-season native grasses). Invertebrates were sampled by sweepnetting from mid-May through early August. Vegetation characteristics were analyzed using visual obstruction reading and canopy coverage estimates. …
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Evaluation of Duck Production On Waterfowl Production Areas in Northeast North Dakota
… was generally poor during the investigation. Native grass species were dominant on the WPA’s and exhibited varied response to burning. Land use of the surrounding private land was largely cropland used to grow small grains. Much of the cropland was maintained in a fallow condition during the …
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Productivity, Carbon Sequestration, Nutrient Accumulation, And Species Interactions In Perennial Biomass Alley Cropping Systems
… and Dewey cv. Rush), and an eleven species native polyculture. After four years of growth, we found that NM6 poplar alley cropping systems maximized biomass yields at Empire (13.5 Mg ha-1 yr-1) and Granada, MN (9.6 Mg ha-1 yr-1), irrespective of herbaceous crop type. NM6 poplar – …
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Conversations with Farmers: Agri-cultural practice change and the 'eco-innovator'
… integrative practices, including regeneration of native grasses, adaptive/strategic grazing, and pasture cropping/no-kill cropping. These eco-innovators were ultimately redefined by their journeys of change, which navigated from a traditional/productivist paradigm to a 'new', alternative paradigm. …
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Using Resident Small Mammals to Assess the Habitat Potential of Experimental Biofuels Feedstocks
… part of the global energy economy. The use of native grasses for production of cellulosic ethanol is an emerging area of research. However, there is a paucity of research related to the expanded use of biofuels in the northern Great Plains. The study presented here is an integral part of an …
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Sharp-Tailed Grouse Nesting and Brooding Habitat in Southwestern North Dakota
… quadrat-method. Regrowth, tame, and native vegetation types were utilized most frequently by nesting and brooding sharp-tail hens. Most nests and broods were found in the rolling grassland range-site. Most nesting sharp-tails were observed in pastures under a deferred-rotation grazing …
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