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Showing 1 to 20 of 22 for “"rare plants"”.
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Using population ecology to inform the conservation of Nevada's rare plants
… with almost two in five species of vascular plants at risk for extinction. Rare plants make up a nontrivial portion of that global diversity, but are disproportionately threatened by global change. Therefore, it is critical to effectively estimate population size as well as understand the …
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The Vascular Flora of Greater San Quintín, Baja California, Mexico
<p>The plants of San Quintín (Baja California, Mexico) were documented through intensive fieldwork and the collection of herbarium specimens to create a checklist of species. This region is home to a diverse flora with high levels of local endemism and many rare plants. The flora documented in this …
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The Vascular Flora of Garrard County, Kentucky
… loss and invasive species continue to degrade rare plant community remnants and populations of rare plants. Applications of baseline floristic inventories can be used in assessing conservation priorities for landscape preservation in Kentucky. </p>
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Stand Dynamics in a Southern Appalachian Montane Pine Barren, Warm Springs Mountain, Virginia
… (Wangenh.), this shrubland is home to numerous rare plants and invertebrates. We used vegetation analysis and dendrochronology to document establishment and recruitment patterns and to identify successional trends at this site. Tree establishment of the dominant tree species (P. rigida and …
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Survey of the Native and Nonnative Vascular Plant Species of Three Islands in Lake Winnipesaukee, New Hampshire
… and basal areas. This study also focused on plants of interest including certain rare (Rhododendron maximum), introduced (Halesia carolina) and potentially invasive species (Poa compressa). Data from the study shows that the species richness on all the islands increased significantly from …
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A Flora of Coyote Ridge and Flat, Inyo County, California
… inventory of the vascular and non-vascular plants of Coyote Ridge and Flat was conducted to establish baseline data for one such sensitive alpine and subalpine habitat. Located in the northwest corner of Inyo County, California, the study site encompasses ca. 130 km2 (50 mi2) and ranges from …
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The reproductive ecology of Minuartia patula Michx. Mattf. (Caryophyllaceae)
… and central United States. This species is rare in Illinois, Indiana and Ohio; and vulnerable in Kentucky, Missouri, and Virginia. Though research on environmental pollution, seed germination, and allelopathic effects have been conducted for this species, little is known about its …
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Impacts of Deer and Honeysuckle on the Endangered Trillium Reliquum and Its Associated Plant Community
The effects of herbivores and invasive plants on native plants are well known, but few studies have addressed their impacts on rare plants. Threatened or endangered plant species may be more susceptible to negative effects of biotic factors due to their already low distributions. My study …
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Assessing the effects of invasive Ligustrum sinense and Lonicera japonica on rare and federally threatened Scutellaria montana
… interactions between invasive and co-occurring rare plants. Federally threatened Scutellaria montana Chapm. (large -flowered skullcap) is a rare herbaceous perennial endemic to southeastern Tennessee and northwestern Georgia. The forest understory habitat in which S. montana typically occurs …
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Ecological and Genetic Status of the Purple Pitcher Plant, <i>Sarracenia purpurea</i> L., in Maryland and Virginia
<p><em>Sarracenia purpurea</em> is a rare wetland plant in Virginia and a threatened species in Maryland, with two potential subspecies in the region. I utilized restriction fragments from the intron of the chalcone synthase gene to compare <em>S. purpurea</em> populations and determine whether the …
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Using digitized herbarium specimens to predict potential distributions of Tennessee's historical angiosperm species
Species distribution models (SDMs) have become an essential tool in focusing conservation efforts for species with incomplete distribution records. SDMs enable conservation managers to increase field survey efficiency by prioritizing areas to invest time and financial resources. This application is …
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A Flora of the Silver Peak Range, Esmeralda County, Nevada
<p>The Silver Peak Range and surrounding valleys lie east of the White Mountains of California in Esmeralda County, Nevada, in a transition between the Great Basin and Mojave Deserts. The flora of the region is influenced by the northern Mojave Desert to the south, White Mountains to the west, …
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How Are Rare Species Maintained?: Reproductive Barriers Between Layia jonesii, a Rare Serpentine Endemic, and L. platyglossa
… barriers are maintained, particularly between rare and widespread relatives. <em>Layia jonesii</em>, a rare San Luis Obispo County serpentine endemic, and <em>L. platyglossa, </em>a common coastal species,<em> </em>co-occur on serpentine derived hillsides and are interfertile. At these …
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Vegetation, diversity and rarity on the Cape Peninsula, South Africa
… been no studies which compare the attributes of rare and ' common plant species. There were no strong relationships between rarity status and biological attributes of species. However, rare species occupy wider resource niches as measured in multivariate space. Although some habitats contained a …
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The vascular flora and species distribution modeling of two rare species in Cloudland Canyon State Park, Dade and Walker Counties, Georgia
… 9.6%), and Cyperaceae (52; 7.8%). Twenty-eight rare species were documented, including 10 S1 and 13 S2 species. Two hundred and thirty-four county records were documented with 209 in Dade County and 25 in Walker County. Concurrently with the floristic investigation, species distribution models …
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Studi pengujian metode isolasi DNA dari spesimen herbarium Rafflesia
… which very different to compare with higher plants. Nearly most of the species in the genus Rafflesia classified as rare plants with precarious status (endangered) (EN 3cd) according to the IUCN 1994 criteria in the number of individuals, populations and genetic diversity. Conservation …
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Mushroom body expansion and the cognitive ecology of Heliconius butterflies
… learning and recognition of Passiflora host plants. To test this, I conducted shape learning assays across six Heliconiini species. However, Heliconius did not, a as group, out-perform the outgroup species. In addition, I conducted geometric morphometric analyses on Passiflora leaf shape to …
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Testing Reintroduction Potential of Abronia macrocarpa (Nyctaginaceae)
… (87.5%) than experimental property 1 (19 .4% ). Plants at all stages of development (seedling, juvenile, anthesis) were observed at experimental property 2, but plants remained in the seedling stage at experimental properties 1 and 3. The levels of nitrate and potassium were higher at …
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Vascular flora of Bark Camp Barrens WMA, Coffee County, Tennessee
… or G2, 35 species were listed on the Tennessee Rare Plant List, and 209 species were S1 or S2. Additionally, all known digitized herbarium specimens from the nearby May Prairie State Natural Area were cataloged, creating a preliminary vascular plant checklist of 387 species. Furthermore, a list …
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