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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 30 for “"Rare plant"”.
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THE INFLUENCE OF ENVIRONMENTAL VARIABLES ON PREDICTING RARE-PLANT HABITAT IN THE NEZ PERCE NATIONAL FOREST
… the biophysical requirements and distribution of plant and animal species. Many of these modeling efforts use different variants of essentially the same topo-climatic variables (elevation, slope, aspect, precipitation, and temperature). However, these commonly used variables may not sufficiently …
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THE INFLUENCE OF ENVIRONMENTAL VARIABLES ON PREDICTING RARE-PLANT HABITAT IN THE NEZ PERCE NATIONAL FOREST
… the biophysical requirements and distribution of plant and animal species. Many of these modeling efforts use different variants of essentially the same topo-climatic variables (elevation, slope, aspect, precipitation, and temperature). However, these commonly used variables may not sufficiently …
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Vascular flora and rare plant modeling of the Walls of Jericho Forever Wild Tract, Jackson County, Alabama
… suitable habitat in which several other rare species were found, such as Blephelia subnuda (Lamiaceae), Asplenium ruta-mariana (Aspleniaceae), and Viburnum bracteatum (Viburnaceae).
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A biosystematic study of the rare plant <i>Paronychia virginica</i> Sprengel (Caryophyllaceae) employing morphometric and allozyme analyses
… exceeding those values reported for seed plants, widespread species, and endemic species. Hierarchical F statistics suggest higher levels of genetic variability within individual populations than among populations, regardless of geographic location. All statistically significant (P < 0.05) …
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A SIMPLE GIS APPROACH TO PREDICTING RARE PLANT HABITAT: NORTH CENTRAL ROCKY MOUNTAINS, UNITED STATES FOREST SERVICE, REGION ONE
Understanding the potential distribution of rare species is a key component in managing and regulating land-use activities. Predictive modeling of plant distributions rests on the assumption that correlations exist between the presence or absence of a species and selected climate, topographic, …
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A SIMPLE GIS APPROACH TO PREDICTING RARE PLANT HABITAT: NORTH CENTRAL ROCKY MOUNTAINS, UNITED STATES FOREST SERVICE, REGION ONE
Understanding the potential distribution of rare species is a key component in managing and regulating land-use activities. Predictive modeling of plant distributions rests on the assumption that correlations exist between the presence or absence of a species and selected climate, topographic, …
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The influence of white-tailed deer on plant communities in West Virginia and stakeholder attitudes toward deer management with respect to plant conservation
… deer (Odocoileus virginianus) may impact plant species by reducing individual survival or reduce reproductive potential by feeding on flowering parts or seeds. Herbivory may benefit plant populations by increasing dispersal of seeds. The combination of these factors may influence the …
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Vascular flora of Bark Camp Barrens WMA, Coffee County, Tennessee
A vascular plant inventory of Bark Camp Barrens Wildlife Management Area, Coffee County, Tennessee was performed over the 2023 and 2024 growing seasons. The site is a 1,395-ha area located 10km east of Manchester, Tennessee in the Barrens region of the Eastern Highland Rim. A total of 698 species …
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Life history biology and soil characteristics of two species of Arctomecon (Papaveraceae)
Two rare plant species of the Mojave Desert were investigated in this study. Life history and reproductive data as well as vegetative associates and soil characteristics for Arctomecon californica Torr. and Frem. and Arctomecon merriamii Cov. were collected. Results for the life history and …
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Development of a Predictive Habitat Evaluation Model for Gaillardia Aestivalis (Walt.) Rock. Var. Winkleri (Cory) Turner Using GPS, Remote Sensing and GIS Techniques
… and ecological requirements (soil, site, plant associations) of the plant. Data were obtained from paper maps, aerial photographs and a Landsat TM image. Sites occupied by G. aestivalis var. Winkleri were characterized as having highly acidic soils with poor nutrient content, good drainage …
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A Vascular Flora of the Nopah Range, Inyo County, California
… a specimen-based inventory of the vascular plants resulting in the production of an annotated checklist, and to assess the status of rare plant species and possible edaphic endemics within the study area. Between 2018 and 2022, 73 days were spent in the field resulting in 1,201 vascular …
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Pollination of Basalt Daisy (Erigeron basalticus: asteraceae)
<p>Erigeron basalticus (basalt daisy) is a rare plant occupying a very restricted range of approximately 52 km<sup>2</sup> in only two counties (Kittitas and Yakima) in central Washington State. Growing out of the cracks and crevices of basalt columns, the population of E. basalticus is fragmented …
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The Vascular Flora of Garrard County, Kentucky
… state and private conservation agencies. Two plant communities known to occur in the county, Limestone/Dolomite Prairie and Bluegrass Mesophytic Cane Forest, are listed as Endangered in Kentucky. Other plant communities are described and compared with previous vegetation studies of the …
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A Floristic Study of the Cal Poly Swanton Pacific Ranch and a New Combination in Sanicula crassicaulis (Apiaceae), Sanicula crassicaulis var. Nudicaulis
… and potentially a sixth mass extinction event. Plant specimens are one of the best, most concrete records of biodiversity that we can create. Despite this, the rate of plant collecting has declined steeply since World War II. Now more than ever, plant collections are vital, both for the purpose …
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A Vascular Flora of the Manter and Salmon Creek Watersheds, Tulare County, California
… subsp. austrina, Eriogonum polypodum ) and rare taxa (e.g., Eriogonum breedlovei var. shevockii, Carlquistia muirii ). In addition, the Domeland Wilderness, which makes up 65 sq. km. (25 sq. mi.) or ca. 50% of the study area, has had little formal documentation of plant diversity. …
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Assessing Recreation Impacts to Cliffs in Shenandoah National Park: Integrating Visitor Observation with Trail and Recreation Site Measurements
… National Park provide habitat for several rare and endangered plant and animal species. The location of the world-famous ridgeline parkway, Skyline Drive, makes many outcrops and cliffs within the park readily accessible to the park's 1.2 million annual visitors. Consequently, visitor use …
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THE AUTECOLOGY OF THE MEADOW THISTLE (Cirsium dissectum L. Hill) ON DEVON RHoS PASTURES, WITH PARTICULAR REFERENCE TO THE EFFECT OF MAJOR ENVIRONMENTAL VARIABLES ON THE POPULATION DYNAMICS
… into the community dynamics of one particularly rare plant community, the Cirsio-Molinietum fen meadow (NVC M24). This was achieved by examining the autecology of Cirsium dissectum, one of the key indicator species of this community. The habitat environment where C. dissectum is present was …
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