Bibliografías temáticas / Coal darter

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Literatura académica sobre el tema "Coal darter"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 13 de febrero de 2022

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Artículos de revistas sobre el tema "Coal darter"

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Kreiser, Brian R., Scott R. Clark y Jacob F. Schaefer. "Microsatellite Loci for the Threatened Pearl Darter and Cross Amplification in Channel and Coal Darters". Journal of Fish and Wildlife Management 12, n.º 1 (29 de abril de 2021): 257–62. http://dx.doi.org/10.3996/jfwm-21-008.

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Abstract The Pearl Darter Percina aurora is an imperiled species of fish currently only found in the Pascagoula River drainage in southern Mississippi. We tested 60 microsatellite loci identified by Illumina pair-ended sequencing. Forty of these loci were polymorphic in Pearl Darters with a mean number of alleles per locus of 11.5 and mean observed and expected heterozygosity values of 0.818 and 0.805, respectively. Eleven to 17 of these loci were also polymorphic in the closely related Channel Darter P. copelandi and Coal Darter P. brevicauda. These loci should prove useful in genetic studies associated with informing future management decisions for Pearl Darters and conservation efforts in other species of darter.
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Jones, Kenny D., Bernard R. Kuhajda y Michael W. Sandel. "Complete mitochondrial genome for the Mobile River Basin endemic Coal Darter, Percina brevicauda (Perciformes, Percidae)". Mitochondrial DNA Part B 4, n.º 1 (2 de enero de 2019): 2031–32. http://dx.doi.org/10.1080/23802359.2019.1617066.

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Adamczyk, Zdzisław, Joanna Komorek y Małgorzata Lewandowska. "SPECIFIC TYPES OF COAL MACERALS FROM ORZESZE AND RUDA BEDS FROM ”PNIÓWEK” COAL MINE (UPPER SILESIAN COAL BASIN – POLAND) AS A MANIFESTATION OF THERMAL METAMORPHISM". Archives of Mining Sciences 59, n.º 1 (1 de marzo de 2014): 77–91. http://dx.doi.org/10.2478/amsc-2014-0006.

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Abstract Subject of the research were coal samples from the seams of Orzesze and Ruda beds from “Pniówek” coal mine. All samples represent methabituminous coal B, which present high vitrinite content (V mmf > 60%). Optical character of vitrinite from all analyzed coal samples is biaxial negative and it is characterized by low differentiation of bireflectance. The experiments have shown that the coal rank of investigated samples is generally decreasing with increasing both depth of coal seams and the distance between sampling point and the Carboniferous roof. It may suggests inversion of coalification. Specific types of macerals, typical for thermally metamorphosed coals have been found for all analysed coal samples. It was found, presence of such components like: fluorescing bituminous substance (FBS) filling of cellular spaces in semifusinite, fusinite, and funginite; pseudomorphs after megaspores exhibiting strong bireflectance, and anisotropic semifusinite. Petrographic components with a structure similar to structure of coke and pyrolytic carbon were observed rarely. Presence of colotelinite grains which are visible darker, impregnated with bituminous substance and exhibiting weak fluorescence may be related with influence of temperature on coal. Carbonates occur as filling of cellular spaces in semifusinite, in examined coal samples and there are the effect of thermal alteration of coal.
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Cui, Chengwu. "Which color is more colorful, the lighter one or the darker one?" Color Research & Application 28, n.º 3 (junio de 2003): 168–74. http://dx.doi.org/10.1002/col.10142.

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Heckaman, Rodney L. y Mark D. Fairchild. "Brighter, more colorful colors and darker, deeper colors based on a theme of brilliance". Color Research & Application 36, n.º 4 (23 de junio de 2010): 255–65. http://dx.doi.org/10.1002/col.20621.

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Misiak, Jacek. "Petrographic composition and forms of bituminous coal lithotypes in the Upper Carboniferous Formations of the Upper Silesian Coal Basin". Gospodarka Surowcami Mineralnymi 33, n.º 3 (26 de septiembre de 2017): 109–20. http://dx.doi.org/10.1515/gospo-2017-0037.

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Abstract Bituminous coal samples were collected from mine excavations of six mines in the Upper Silesian Coal Basin. I n the mentioned mining excavations, the stratighaphic sections, in the form of spot samples, were measured. Based on the macroscopic and microscopic observation, an attempt was made to determine the different lithotypes of coal. Vitrain coal is made of tellinite and collotelinite; the thickness of the layers varies from very thin, thin, medium, to coarse. Durain, which is dominated by macerals from the vitrinite group, is characterized by a darker, almost black color, genetically linked to heavily flooded peat areas, where the deposited phytogenic material is subjected to humification and gelification processes. A brighter durain, with a dark gray color, is dominated by macerals from the inertinite group that originated in the shallower areas of peat bogs where the water level was periodically lowered, which has led to the oxidation of the material deposited in the peat bog. Fusain is another coal component or constituent; it is produced as a result of peat bog fires. It is a charred (not burned) material deposited in the form of layers, lenses, usually with a thickness of up to several millimeters (or, less commonly, several centimeters), or dispersed in the form of shreds in the durain. The petrographic composition is dominated by fusinite and inertodetrinite. Fusain occurs in two varieties: soft (empty cellular spaces) and hard, usually mineralized with carbonates (siderite) or sulphides (pyrite, marcasite). The structure of bituminous coal is, due to its origin, most often laminated and consists of alternating dull and bright layers. Occasionally, such layering can be observed in bright coal, which is the result of layering of large parts of gelified plant materials. When it comes to larger sections of dull coal (without bright coal) in the profile, a solid structure can be observed. Some of the sections in the coal seam profiles show a distorted structure; warped, sometimes shredded layers of vitrain in durain, often containing lenses or shreds of fusain, can be observed.
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Khan, Mumtaz, Paul B. Cavers, Marguerite Kane y Ken Thompson. "Role of the pigmented seed coat of proso millet (Panicum miliaceumL.) in imbibition, germination and seed persistence". Seed Science Research 7, n.º 1 (marzo de 1997): 21–26. http://dx.doi.org/10.1017/s0960258500003329.

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AbstractProso millet (Panicum miliaceumL.) is both a crop and a weed in many parts of the world. The weedy biotypes exhibit a wide range of seed colours, but the strains with the most persistent seeds are distinguished by darker seeds. This paper compares the seed biology of a range of biotypes from Canada and demonstrates that darker seeds have heavier seed coats, imbibe and germinate more slowly, and suffer less imbibition damage (measured as electrolyte leakage). It is concluded that all these attributes contribute to the increased persistence in the soil of the dark-seeded weedy biotypes. Imbibition damage is widely implicated in poor emergence and low vigour of crop seeds, but has not previously been considered in the context of weed seed persistence.
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Xiong, Mei, Mengli Zhao, Zhen-Xiang Lu y Parthiba Balasubramanian. "Genotypic variation for phenolic compounds in developing and whole seeds, and storage conditions influence visual seed quality of yellow dry bean genotypes". Canadian Journal of Plant Science 100, n.º 3 (1 de junio de 2020): 284–95. http://dx.doi.org/10.1139/cjps-2019-0153.

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Seed coat colour is an important determinant of the visual quality of dry beans, as seeds are sold as a dry commodity. Phenolic compounds have a major effect on the colour of bean seeds. The objectives of the study were to determine the changes in phenolic compounds during seed development and in whole seeds of yellow bean genotypes with contrasting seed coat colour, and the effects of storage temperature and duration on seed phenolics and colour. Condensed tannin, phenolic acid, flavonoids, and antioxidant activity were observed as early as 10 d after flowering in the developing seeds of Arikara Yellow, which darken at harvest and during postharvest storage. In contrast, for CDC Sol and AAC Y073 seeds which remain yellow, phenolic compounds and antioxidant activity were consistently low. Seed brightness (L*) and yellow colour (b*) were negatively correlated with phenolic compounds and antioxidant activity, and conversely seed redness (a*) was positively correlated with phenolic compounds, confirming a negative influence of phenolic compounds on seed coat colour. Yellow bean genotypes had low anthocyanin but were high in β-carotene. Storage temperature influenced condensed tannin and seed coat colour, whereas the duration of storage influenced phenolic compounds, antioxidant activity, and seed coat colour. Higher temperatures (20 or 30 °C) and longer storage duration (120 or 180 d) generally resulted in darker seeds with increasing redness compared with seeds stored at 6 °C or for 60 d. AAC Y073 and CDC Sol with improved seed coat colour may increase consumer preference, value, and marketability of yellow beans.
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Iliushin, Vadim Alexandrovich. "First find of Cadophora antarctica Rodr.-Andrade, Stchigel, Mac Cormack & Cano in the Arctic". Czech Polar Reports 10, n.º 2 (1 de julio de 2020): 147–52. http://dx.doi.org/10.5817/cpr2020-2-11.

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Cadophora antarctica Rodr.-Andrade, Stchigel, Mac Cormack & Cano was isolated from spoil tip of coal mine in the Arctic, on the territory of the Svalbard archipelago, and is represented by strain IVA-206. Macro- and micromorphology of the isolate were examined along with partial sequences of Internal transcribed spacer rDNA region (ITS1-5.8S-ITS2) and D1/D2 region of 28S rDNA (LSU). The isolate C. antarctica IVA-206 had a number of features that distinguished it from the strain C. antarctica CBS 143035 from Antarctica. Colonies of Arctic strain had darker pigmentation, ramoconidia and conidia were larger, and the optimal growth temperature was higher. As a result of our study, we first discovered the microfungi C. antarctica Rodr.-Andrade, Stchigel, Mac Cormack & Cano in the Arctic. Our study shows that C. antarctica Rodr.-Andrade, Stchigel, Mac Cormack & Cano is a bipolar species found in both the Arctic and Antarctic region.
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Thomas, Druml, Grilz-Seger Gertrud, Horna Michaela y Brem Gottfried. "Discriminant analysis of colour measurements reveals allele dosage effect of ASIP/MC1R in bay horses". Czech Journal of Animal Science 63, No. 9 (31 de agosto de 2018): 347–55. http://dx.doi.org/10.17221/105/2017-cjas.

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Considering the variability of bay coat colour, we aimed to investigate the association of different shades of bay with ASIP and MC1R genotype combinations and we studied the discrimination between the bay and black coat colour. We phenotypically characterized coat colour using a spectrophotometer. The measurements were based upon international standards as defined by the CIE L*a*b* colour system and we phenotyped five different body parts (neck, armpit area, shoulder, belly, croup) of 43 bay and 14 black horses kept under standardized conditions. From the five measuring points a stepwise discriminant analysis revealed that chromacity and luminescence of armpit area and luminescence of the neck were the most important traits to differentiate between black and bay horses, whereas it was shown that the red colour spectrum of neck, luminescence of the neck, and luminescence of the armpit area grouped bay horses according to their ASIP and MC1R genotype combinations. Within the group of bay horses the analyses identified a single ASIP/MC1R genotype combination (A/a E/E) where colour variables differed significantly from the three remaining genotype groups. A/a E/E horses were characterized in all body parts except in the armpit region by significant darker shades (lower luminescence, less chromacity). Regarding classifications of coat colour, we found in the significant cluster of A/a E/E horses the coat colour categories seal brown and dark (mahogany) bay. Overall, we were able to show that the characterization of equine coat colour based upon international standards as defined by the CIE L*a*b* colour system represents a valuable tool for a precise description of colour variation and association analyses.
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Tesis sobre el tema "Coal darter"

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Gould, Darren [Verfasser], Walter [Akademischer Betreuer] Lang y Nejila [Akademischer Betreuer] Parspour. "The Design, Simulation and Implementation of Inductively Powered Sensor Systems: New Applications, Design Methodologies and a Unique Coil Topology / Darren Gould. Gutachter: Walter Lang ; Nejila Parspour. Betreuer: Walter Lang". Bremen : Staats- und Universitätsbibliothek Bremen, 2012. http://d-nb.info/1071992538/34.

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Schiding, Erin Elizabeth. "Survival and reproduction of re-introduced species of selected darters and shiners in Coal Creek, TN". 2009. http://etd.utk.edu/2009/May2009Theses/SchidingErinElizabeth.pdf.

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Gilpin, Cheryl. "Diel Temperature and Dissolved Oxygen Patterns in Sites with and without Planktonic Life Stage of Thompsodinium intermedium in Comal Springs, TX". Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11222.

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Between July 2009 and October 2011, a new habitat was found for a rarely reported freshwater dinoflagellate species, Thompsodinium intermedium - Comal Springs (Comal County), Texas. In 2011, diel in-situ monitoring in monospecific blooms of this species revealed previously undetected negative impacts on endangered species habitat availability associated with conditions of low flow levels, recorded at the U.S. Geological Survey gage # 08169000 on Texas Commission on Environmental Quality river segment 1811 station 12655. During a period of low springflow in the summer of 2011, late afternoon and early morning measurements of dissolved oxygen and temperature and presence of dinoflagellate blooms were monitored at six sites. Significant differences in diel fluctuations were found in all of these parameters among sites with and without the planktonic blooms. These fluctuations increased risk of hypoxia and hyperthermia conditions at sites of planktonic bloom events. Arrays of in-situ continuous monitoring temperature/light probes were used inside and outside of blooms. Wildlife and human health implications are that hypoxia and hyperthermia are known to promote conditions favorable to harmful microbes which may be transported from springs to coastal bays. In-situ data demonstrated that T. intermedium blooms, hypoxia, and hyperthermia occurred in the upper Comal headwaters. These natural environmental stressors may be avoidable if adequate springflows are maintained to buffer against these impacts.
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Libros sobre el tema "Coal darter"

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McDermid, Val. A Darker Domain. Glasgow: HarperCollins, 2008.

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McDermid, Val. A darker domain. London: HarperCollinsPublishers, 2008.

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McDermid, Val. A Darker Domain. New York: HarperCollins, 2009.

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McDermid, Val. A darker domain: A novel. New York, NY: Harper, 2009.

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McDermid, Val. A darker domain: A novel. New York: Harper, 2009.

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E, Shepard Thomas y Geological Survey of Alabama. Environmental Geology Division., eds. Status surveys of the Cahaba shiner (Notropis cahabae), coal darter (Percina brevicauda), and Tuskaloosa darter (Etheostoma douglasi) in the Locust Fork, and Valley Creek Systems, Alabama, 2001. Tuscaloosa, Ala: Geological Survey of Alabama, Environmental Geology Division, 2002.

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A Darker Domain. HarperCollins Publishers, 2009.

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A darker domain. harpercollins, 2008.

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Galindo, Laura. Periodismo cool. Ediciones Uniandes, 2021. http://dx.doi.org/10.51566/ceper2102.

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"El periodismo cultural debe reinventarse para dar cuenta de los juegos de lo simbólico en el siglo XXI, de nuevas prácticas y objetos culturales, tales como la moda, las redes sociales, las músicas y las comidas. Por eso, en esta obra hacemos una propuesta por un periodismo cool sobre lo pop social. La autora, Laura Galindo M., narra con pasión desenfrenada las levedades que nos habitan para aventurarse a darle sentido a nuestro tiempo, efímero y fluido. Es un trabajo que enuncia y mira desde ese “desdeñable” mundo de lo light & cool, que es signo del presente. Lo acompañan un perfil sobre el periodista latino más importante en los Estados Unidos escrito por Felipe Restrepo Pombo, quien fue director de la revista Gatopardo, y un ensayo de Omar Rincón sobre la cultura de nuestro tiempo, que él denomina la coolture"
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Team, San Marcos/Comal Recovery, U.S. Fish and Wildlife Service. Ecological Services Field Office (Austin, Tex.) y U.S. Fish and Wildlife Service. Region 2., eds. San Marcos and Comal Springs and associated aquatic ecosystems (revised) recovery plan (short title: San Marcos/Comal (revised) recovery plan) for San Marcos gambusia (Gambusia georgei), Fountain darter (Etheostoma fonticola), San Marcos salamander (Eurycea nana), Texas wild-rice (Zizania texana), Texas blind salamander (Typhlomolge rathbuni). [Austin, Tex.]: The Service, 1996.

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Capítulos de libros sobre el tema "Coal darter"

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"Historical Changes in Large River Fish Assemblages of the Americas". En Historical Changes in Large River Fish Assemblages of the Americas, editado por Thomas P. Simon, Ronda L. Dufour y Brant E. Fisher. American Fisheries Society, 2005. http://dx.doi.org/10.47886/9781888569728.ch20.

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<em>Abstract.</em>—The Patoka River drainage is a lowland-gradient watershed of the Wabash River lowlands in southwestern Indiana. During the late 18th century, the river was part of an extensive riparian floodplain wetland that connected the White River with the lower Wabash River. Through anthropogenic changes as a result of ditching, channelization, levee creation, coal extraction, and oil and gas exploration, the Patoka River drainage has been highly altered. These changes have resulted in a loss of sitespecific biological diversity and integrity, causing drainage-wide biological diversity decline. Extirpations in the watershed have resulted in the local loss of 12.7% of the fish fauna during the last century. The local extirpations of six species included central mudminnow <em>Umbra limi</em>, black redhorse <em>Moxostoma duquesnei</em>, brindled madtom <em>Noturus miurus</em>, bluebreast darter <em>Etheostoma camurum</em>, slenderhead darter <em>Percina phoxocephala</em>, and saddleback darter <em>P. vigil</em>. Black redhorse, bluebreast darter, slenderhead darter, and saddleback darter were only known from pre-1900, while brindled madtom and central mudminnow were known until the early 1940s. These species may have been rare to begin with in the Patoka River drainage, but since they are widespread elsewhere, it seems more probable that they disappeared as a result of the land-use changes. Sensitive species of darters and minnows have declined in abundance, but recent sampling has shown that they remain in the watershed at low abundance. Based on a probability sample, less than 12% of the channels represented reference least-disturbed conditions, while 61% exhibited degraded conditions.
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"Historical Changes in Large River Fish Assemblages of the Americas". En Historical Changes in Large River Fish Assemblages of the Americas, editado por Thomas P. Simon, Ronda L. Dufour y Brant E. Fisher. American Fisheries Society, 2005. http://dx.doi.org/10.47886/9781888569728.ch20.

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<em>Abstract.</em>—The Patoka River drainage is a lowland-gradient watershed of the Wabash River lowlands in southwestern Indiana. During the late 18th century, the river was part of an extensive riparian floodplain wetland that connected the White River with the lower Wabash River. Through anthropogenic changes as a result of ditching, channelization, levee creation, coal extraction, and oil and gas exploration, the Patoka River drainage has been highly altered. These changes have resulted in a loss of sitespecific biological diversity and integrity, causing drainage-wide biological diversity decline. Extirpations in the watershed have resulted in the local loss of 12.7% of the fish fauna during the last century. The local extirpations of six species included central mudminnow <em>Umbra limi</em>, black redhorse <em>Moxostoma duquesnei</em>, brindled madtom <em>Noturus miurus</em>, bluebreast darter <em>Etheostoma camurum</em>, slenderhead darter <em>Percina phoxocephala</em>, and saddleback darter <em>P. vigil</em>. Black redhorse, bluebreast darter, slenderhead darter, and saddleback darter were only known from pre-1900, while brindled madtom and central mudminnow were known until the early 1940s. These species may have been rare to begin with in the Patoka River drainage, but since they are widespread elsewhere, it seems more probable that they disappeared as a result of the land-use changes. Sensitive species of darters and minnows have declined in abundance, but recent sampling has shown that they remain in the watershed at low abundance. Based on a probability sample, less than 12% of the channels represented reference least-disturbed conditions, while 61% exhibited degraded conditions.
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"Historical Changes in Large River Fish Assemblages of the Americas". En Historical Changes in Large River Fish Assemblages of the Americas, editado por Blaine D. Snyder. American Fisheries Society, 2005. http://dx.doi.org/10.47886/9781888569728.ch23.

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<em>Abstract.</em>—The Susquehanna River drains portions of New York, Pennsylvania, and Maryland, and is the 18th largest river (by discharge) in the United States. Although relatively undeveloped (i.e., 63% of the basin is forested, whereas 9% is urban), the river and its fish assemblage have experienced stresses associated with coal mining, logging, electric power generation, population growth, and agricultural and industrial operations. Surveys of Susquehanna River fishes have a rich history, with the qualitative surveys of 19th century naturalists giving way to the quantitative studies of 20th century environmental impact assessment specialists. Ichthyofaunal surveys of the Susquehanna drainage were compiled and summarized herein to examine species composition, losses, and additions. Collection records indicate that the Susquehanna River drainage supports a diverse and relatively stable assemblage of 60 native species (or 51% of all species), 33 (28%) alien species, 22 (19%) euryhaline or diadromous fishes, and 2 (2%) extirpated or extinct species. Stocking efforts, bait-bucket releases, range extensions, and new species descriptions accounted for most contemporary species additions. Overall reduction in species richness has been limited to one cyprinid that has not been collected since 1862, and one darter species that has not been collected since 1987. Construction of four large hydroelectric dams on the lower Susquehanna (in the early 20th century) eliminated 98% of historic anadromous fish habitat, leading to notable reductions in commercial/ recreational clupeid stocks. Recent increases in the occurrence and abundance of anadromous fish in the Susquehanna River are a credit to an extensive restoration program that began with fish trap and transfer operations in 1972, included fish culture programs, and led to the installation of fish passage technologies at each of the four dams.
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"Historical Changes in Large River Fish Assemblages of the Americas". En Historical Changes in Large River Fish Assemblages of the Americas, editado por Blaine D. Snyder. American Fisheries Society, 2005. http://dx.doi.org/10.47886/9781888569728.ch23.

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<em>Abstract.</em>—The Susquehanna River drains portions of New York, Pennsylvania, and Maryland, and is the 18th largest river (by discharge) in the United States. Although relatively undeveloped (i.e., 63% of the basin is forested, whereas 9% is urban), the river and its fish assemblage have experienced stresses associated with coal mining, logging, electric power generation, population growth, and agricultural and industrial operations. Surveys of Susquehanna River fishes have a rich history, with the qualitative surveys of 19th century naturalists giving way to the quantitative studies of 20th century environmental impact assessment specialists. Ichthyofaunal surveys of the Susquehanna drainage were compiled and summarized herein to examine species composition, losses, and additions. Collection records indicate that the Susquehanna River drainage supports a diverse and relatively stable assemblage of 60 native species (or 51% of all species), 33 (28%) alien species, 22 (19%) euryhaline or diadromous fishes, and 2 (2%) extirpated or extinct species. Stocking efforts, bait-bucket releases, range extensions, and new species descriptions accounted for most contemporary species additions. Overall reduction in species richness has been limited to one cyprinid that has not been collected since 1862, and one darter species that has not been collected since 1987. Construction of four large hydroelectric dams on the lower Susquehanna (in the early 20th century) eliminated 98% of historic anadromous fish habitat, leading to notable reductions in commercial/ recreational clupeid stocks. Recent increases in the occurrence and abundance of anadromous fish in the Susquehanna River are a credit to an extensive restoration program that began with fish trap and transfer operations in 1972, included fish culture programs, and led to the installation of fish passage technologies at each of the four dams.
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Morrissey, Susan K. "On cool reason and hot-blooded impulses". En The Darker Angels of Our Nature. Bloomsbury Academic, 2021. http://dx.doi.org/10.5040/9781350148437.0026.

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Sullivan, Jack. "Bernard Herrmann: Hitchcock’s secret sharer". En Partners in Suspense. Manchester University Press, 2017. http://dx.doi.org/10.7228/manchester/9780719095863.003.0002.

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This opening chapter explores the partnership between Hitchcock and Herrmann both as a very special professional connection between a director and composer but also as an intense Conradian relationship that was as volatile as it was productive. The chapter discusses precisely how Bernard Herrmann fits into Alfred Hitchcock’s overall musical achievement. Their personalities were dramatically opposite —Hitchcock imperious and controlling, Herrmann notoriously explosive and prone to tantrums. Yet the two were deeply sympatico: both had an uncompromising professionalism, a hatred of mediocrity, a mordant sense of humour, and a contempt for the Hollywood establishment matched by a longing for its approval. Herrmann was Hitchcock’s ‘secret sharer’, a harbinger of energies darker and more dangerous than Hitchcock’s cool sensibility easily permitted. He pushed Hitchcock’s cinema deeper than ever into a world of anxiety and obsession.
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Wohl, Ellen. "October: Of Beavers and Humans". En Saving the Dammed. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190943523.003.0013.

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By mid-October, the first snow has fallen on the beaver meadow. There is no sign of snow when I visit a few days later, but the air feels chill in the shadows and a cool breeze leavens the sunshine’s warmth. Mostly, the beaver meadow seems a golden place. Many of the willow, aspen, and birch leaves have already fallen, but enough remain to create a glowing ménage of yellow, gold, palest orange, and tan. Each leaf refracts and filters the light so that it comes from every direction rather than only from above. Aspens on the north-facing valley slope stand bare and pale gray. Those on the south facing slope form bursts of gold among the dark green conifers. The beaver meadow remains lively with activity. Dance flies move upward and downward in a column of air backlit by sunshine, their delicate bodies shimmering in the low-angle light. A little black stonefly lands on the back of my hand. I resist the urge, bred by summer mosquitoes, to reflexively slap it away. As I cross smaller side channels, brook trout dart away from the warm shallows where they have been resting. The narrow band of white on each dorsal fin flashes as the fish moves swiftly toward deeper water. When one small trout gets momentarily stuck between two exposed cobbles, I cup its slender, wriggling body between my hands and help it along. Windrows of fallen leaves form swirling patterns on the water surface and streambed. Filamentous algae grow in thick green strands along the side channels, where lower water exposes wide bands of mud along the channel edges. The mud bands record the comings and goings along the channel: precise imprints of raccoon feet and deer hooves and blurrier outlines left by moose. Moose beds mat down the tall grasses scattered among the willow thickets. As usual, the beavers themselves elude me, but I see fresh mud and neatly peeled white branches with gnawed ends on some of the dams. Lower water in the beaver pond exposes an entrance hole in the side of the lodge.
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Informes sobre el tema "Coal darter"

1

Coastal Lidar And Radar Imaging System (CLARIS) mobile terrestrial lidar survey along the Outer Banks, North Carolina in Currituck and Dare counties. Coastal and Hydraulics Laboratory (U.S.), enero de 2020. http://dx.doi.org/10.21079/11681/39419.

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Resumen
The Coastal Observation and Analysis Branch (COAB) located at the Field Research Facility (FRF) conducts quarterly surveys and post-storm surveys along up to 60 kilometers of coastline within the vicinity of the FRF to assess, evaluate, and provide updated observations of the morphology of the foreshore and dune system. The surveys are conducted using a mobile terrestrial LiDAR scanner coupled with an Inertial Navigation System (INS). Traditionally the surveys coincide with a low tide, exposing the widest swath of visible sediment to the scanner as well as enough wind-sea swell or texture to induce wave breaking upon the interior sandbars. The wave field is measured with X-Band radar which records a spatial time series of wave direction and speed. Data for the survey region was collected using the VZ-2000's mobile, 3D scanning mode where the scanner continuously rotates the line scan 360 degrees as the vehicle progresses forward. Elevation measurements are acquired on all sides of the vehicle except for the topography directly underneath the vehicle. As the vehicle moves forward, the next rotation will capture the previous position's occluded data area. Laser data is acquired in mobile 3D radar mode with a pulse repetition rate of 300kHz, theta resolution of 0.19 degrees and phi resolution of 0.625 degrees. Horizontal Datum NAD83(2011), Projection North Carolina State Plane (3200) meters; Vertical Datum NAVD88, meters with geoid09 applied.
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2

Coastal Lidar And Radar Imaging System (CLARIS) mobile terrestrial lidar survey along the Outer Banks, North Carolina in Currituck and Dare counties. Coastal and Hydraulics Laboratory (U.S.), enero de 2020. http://dx.doi.org/10.21079/11681/39419.

Texto completo
Resumen
The Coastal Observation and Analysis Branch (COAB) located at the Field Research Facility (FRF) conducts quarterly surveys and post-storm surveys along up to 60 kilometers of coastline within the vicinity of the FRF to assess, evaluate, and provide updated observations of the morphology of the foreshore and dune system. The surveys are conducted using a mobile terrestrial LiDAR scanner coupled with an Inertial Navigation System (INS). Traditionally the surveys coincide with a low tide, exposing the widest swath of visible sediment to the scanner as well as enough wind-sea swell or texture to induce wave breaking upon the interior sandbars. The wave field is measured with X-Band radar which records a spatial time series of wave direction and speed. Data for the survey region was collected using the VZ-2000's mobile, 3D scanning mode where the scanner continuously rotates the line scan 360 degrees as the vehicle progresses forward. Elevation measurements are acquired on all sides of the vehicle except for the topography directly underneath the vehicle. As the vehicle moves forward, the next rotation will capture the previous position's occluded data area. Laser data is acquired in mobile 3D radar mode with a pulse repetition rate of 300kHz, theta resolution of 0.19 degrees and phi resolution of 0.625 degrees. Horizontal Datum NAD83(2011), Projection North Carolina State Plane (3200) meters; Vertical Datum NAVD88, meters with geoid09 applied.
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