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 97 for “"forb"”.
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Native Forb Establishment in Tall Fescue-dominated Cattle Pastures
… remain in the consistent establishment of native forbs in intensively managed agricultural areas. We evaluated factors that influence native forb establishment during seed-based enrichment planting of tall fescue-dominated cattle pastures in two separate experiments: one testing a range of site …
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The influence of fire-grazer interactions on forb communities in a highveld grassland
… of biodiversity have received little attention. Forbs (non-graminoid, herbaceous plants) are an important component of grassland ecosystems, but how they respond to disturbance is largely unknown. This study compared changes in forb communities on and off of firebreaks (an extreme example of a …
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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
… native deep-rooted perennial bunch grasses and forbs, an increase in annual invasive grasses, and greater sagebrush dominance. Although not as widely used as perennial bunchgrasses, forbs of the Intermountain west have also been tested for use in rehabilitation purposes in the Intermountain …
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Stratospheric ozone depletion and plant-insect interactions: Effects of UVB radiation of generalist and specialist herbivores on a tropical tree and a temperate forb
I investigated effects of UVB radiation on plant-insect interactions using two plant-herbivore systems.
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Plant-pollinator interaction networks in remnant and reconstructed Palouse Prairie in Eastern WA, USA
… despite their being critical to native forb reproduction. Further, ecological restoration has the potential to mitigate global pollinator declines by rebuilding native ecosystems, providing pollinators with floral resources and nesting habitat. This is especially true for prairie …
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CONSEQUENCES OF ALTERED BURN REGIMES ON PLANT COMMUNITY DIVERSITY IN THE PINEYWOODS OF EAST TEXAS
… to genus level and separated into grass, forb, and woody growth form groups.</p> <p>Our results indicated that grass and forb richness increased in response to greater fire frequencies. The number of burns was positively correlated with total, forb, and grass richness. This effect was …
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Enhancing the benefits to biodiversity and ecosystem services within arable field margins
… farming practices can be replaced or reduced. Forb-rich arable field margins have been shown to benefit flower-visiting insects such as wild bees, and recent evidence suggests that they can also enhance the levels of pollination and pest control in adjacent crop fields. They may also promote a …
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Grasshopper species complexes of forage crops in the piedmont region of Virginia
… sampled head (inflorescence) feeders above mixed-forb feeders, and mixed-forb feeders above grass feeders. Compared with other Acrididae, M.f. femurrubrum was over-represented in sweepnet samples above the composite of the other acridids. Within its quild its representation did not differ from the …
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Natural recruitment of native forbs in the grassy ecosystems of south-eastern Australia
As for many lowland grassy ecosystem forbs in South-eastern Australia, the recruitment dynamics of the grassland forbs Podolepis sp. 1 sensu Jeanes 1999 (Basalt Podolepis) and Bulbine semibarbata perennial form (Leek Lily)are unknown. Podolepis sp. 1 and B. semibarbata were used as models of …
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CAN SHEEP CONTROL LEAFY SPURGE WITHOUT COMPROMISING EFFORTS TO RESTORE NATIVE PLANTS?
… on seedling establishment, I measured density of forb and graminoid seedlings in 15 grazed and 15 control (un-grazed) plots; after grazing, plots were treated with one of five experimental seeding treatments that varied by season and density of seed applied. To assess sheep impacts on abundance of …
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CAN SHEEP CONTROL LEAFY SPURGE WITHOUT COMPROMISING EFFORTS TO RESTORE NATIVE PLANTS?
… on seedling establishment, I measured density of forb and graminoid seedlings in 15 grazed and 15 control (un-grazed) plots; after grazing, plots were treated with one of five experimental seeding treatments that varied by season and density of seed applied. To assess sheep impacts on abundance of …
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Wild bee responses to land use change: investigating the role of bee body size
… type, bee diversity increased with increasing forb diversity but did not have significant associations with landscape composition. Trap-nesting bee abundance and interspecific body size did not vary in relation to local forb diversity or landscape composition. In Chapter 2, I again used the …
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Patterns of plant diversity and their management across South African Rangelands
Forbs dominate southern Africa's rangeland plant diversity, but have been ignored in favour of grasses that are important for livestock production. To facilitate better conservation management I examined the interaction between patterns of diversity, forb recruitment and disturbance effects across …
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Reproductive Success and Brood Habitat Use of Greater Prairie Chickens and Sharp-Tailed Grouse on the Fort Pierre National Grassland of Central South Dakota
… and with ground cover of 18% grass and 10% forbs in 2004. During 2005, PC broods used habitats with a mean vegetation height of 38 cm (n = 10) and 18% grass and 5% forb ground cover. ST broods used habitats with a mean vegetation height of 43 cm during both 2004 (n = 8) and 2005 (n = 9). …
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Habitat Selection By Female White-Tailed Deer in the Northern Black Hills, South Dakota and Wyoming
… cm dbh, tree basal area, ground cover of grass-forb and shrubs < lm in height, distance (m) and diameter (cm dbh) of the nearest tree, and topographic variables. During winter, coniferous canopy cover, tree basal area, and grass-forb cover were important variables separating deer locations from …
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Reproductive Ecology of Long-billed Curlews Breeding in Grazed Landscapes of Western South Dakota
… points with an average of 55% grass cover, 47% forb cover and an average visual obstruction reading (VOR) of 27 cm. In the fall of 2005, a natural range fire burned a large area of the study site. The following year, forb cover and VOR’s at nest sites, brood points, and random points decreased …
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Food Habits of Deer In The Southern Black Hills As Determined By The Point Technique
… was constructed from known weights of a forb, (Achillea lanulosa), grass (Oryzopsis asperfoliz), rose (Rosa sp.), kinnikinnick (Arctostaphylos uva-ursi), and ponderosa pine (Pinus ponderosa). Each population was tested with 100-point trails and 200-point trials. Comparisons of point …
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Integrating multiple sign types to improve occupancy estimation for inconspicuous species: a case study of American pika in the Pacific Northwest
… as a function of temperature, precipitation, forb, rock and shrub cover. Results from all three models indicated that annual occupancy across parks was relatively stable during our study period, ranging from 32% to 40% and exhibited a general increase from 2010 to 2014 and a weak decline from …
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