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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 49 for “"annuals"”.
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On the Adaptive Strategies of Successional Winter Annuals
Made available in DSpace on 2014-12-14T13:23:12Z (GMT). No. of bitstreams: 1 7606916.pdf: 2394155 bytes, checksum: ec67960f9fef4ae748d82079fa327d2a (MD5) Previous issue date: 1975
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A History and Evaluation of English Historical Annuals for 1701-1720 and 1739-1743
Made available in DSpace on 2014-12-05T17:01:56Z (GMT). No. of bitstreams: 1 6101612.pdf: 36391793 bytes, checksum: 7e0df20b8b1ab5b9afc13563d557a17d (MD5) Previous issue date: 1961
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Is local plant extinction a product of mutualism breakdown? A case study of the Namaqualand spring flora
… community. It was found that autogamous annuals were at the lowest risk of extinction and were consequently abundant in disturbed lands. Geophytes were completely eliminated by ploughing, however, the cause of their local extinction is not necessarily due to mutualism breakdown and may be …
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Aspects of the structure and phenology of two fynbos communities
… has fewer species in these taxa and more annuals than the moister Kogelberg environment. These floristic changes are reflected also in the growth form spectra and the stratification of the communities. The biomass of the cedarberg community is higher at 1820 g/m2 against 1100 g/m2 for the …
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Ornamental Plants Impact Insect Pollinator Abundance and Diversity in Gardens
… native and non-native plants, perennials and annuals, and among different plant species. Our data revealed significant variation in the total abundance and diversity of flower-visiting attracted insects among plant species. Brown-eyed Susans attracted the highest abundance of insect visitors …
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A holistic approach to Mima mound prairie restoration
… perennial), forcing competition with invasive annuals. It is thought that native perennials should be able to more easily succeed following the native annuals that they evolved with rather than invasive annuals. Both approaches seek to increase community resistance to invasion, which should …
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Assessment of vegetation diversity and rangeland condition in the Highveld communal grazing lands of Swaziland
… were strong perennials and the remaining 7 were annuals. In addition, 5 species were identified as highly palatable, 6-moderately palatable and 4-less palatable species
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The Influence of Biogeography and Mating System on the Ecology of Desert Annual Plants
… in co-occurring selfing and outcrossing desert annuals. Firstly, I tested the abundant center model to determine the role of range position on plant population dynamics. I examined how the geographic and climatic position of 13 desert annuals found at a common location, the Desert Laboratory at …
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Ecosystem Consequences of Post-Fire Invasive Species in the Great Basin Desert
… sagebrush. However, communities dominated by annuals (Bromus tectorum and Sisymbrium altissimum L.) had significantly lower NCE than sagebrush and became sources of carbon to the atmosphere with increased severity of the summer drought. Bunchgrasses partitioned more available energy into …
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Rodent effects on shrubs in a Mojave Desert shrub community
… to increase both the diversity and abundance of annuals in the deserts of 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 …
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Annual forage cropping-systems for midwestern ruminant livestock production
… kg ha-1 . The first set of crops were C4 summer annuals seeded within two weeks of wheat grain harvest and included, brown mid-rib (BMR) sorghum sudangrass, pearl millet, foxtail millet, and tef. The second set of crops included C3 cool-season annuals sown in early August; these were oats, …
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Extending Plant-Plant Facilitation Theory to Pollinators: Do Desert Shrubs Act as Magnets?
… rates with the presence of understory annuals.
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Plant Response to the Barstow to Las Vegas Motorcycle Race of November, 1974
… In the pit area, a positive response was held by annuals due to the edge effect. Differences in percent species composition, density, and cover indicate a change in diversity and stability of the perennial plant vegetation.</p>
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Effects of Sudangrass Cover Crop and Soil Solarization on Weed and Pathogen Management in Organic Strawberry Production
… differed between different species. Cool-season annuals annual sowthistle and bristly oxtongue were more susceptible to heat treatments than warm-season annuals common purslane, redroot pigweed and nettleleaf goosefoot. Hard seeded weed species little mallow and redstem filaree were the least …
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Sowing Seeds Of Subversion: Nineteenth-Century British Women Writers' Subversive Use Of Fairy Tales And Folklore
… examine fiction and poetry published in literary annuals, in fairy-tale collections, and in the more generally available collections of poetry and short stories as deconstructions of hegemonic fantasies regarding ideals of femininity and domesticity as well as the delusion that woman's desires can …
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The effect of hydroperiod on seed banks in semi-permanent prairie wetlands
… densities. The mean relative density of mudflat annuals in all seed pool samples was significantly greater in wetland P4 (82%) than in P1 (52%). A shorter hydroperiod in this wetland produces more frequent drawdowns and a greater input of mudflat annual seeds. Conversely, seeds of emergent …
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Creating a world of books, friends and flowers: gift books in America, 1825-1860
… published a genre of books known as literary annuals or gift books. Elegantly-bound collections of prose, poetry, and illustrations, gift books appeared in bookstores each year in anticipation of Christmas and New Year's. ☐ As an object-driven study, this thesis explores the contexts in which …
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