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49 results for “southern Appalachian Mountains”
Soil microbial and physicochemical data from watersheds impacted by different management practices or wildfire in the Southern Appalachian Mountains, 2023
Four forested watersheds in Western North Carolina with different management practices or disturbance were sampled in the summer of 2023 to compare soil physicochemical, microbial, and functional differences. These data include mineral soil physicochemical properties (location, elevation, aspect, gravimetric moisture content, pH, total carbon and nitrogen, total organic carbon, dissolved organic carbon and nitrogen, total dissolved nitrogen, dissolved inorganic nitrogen (NO3 and NH4), and microbial biomass carbon and nitrogen), soil microbial properties (16S ASV community sequences, ITS ASV community sequences, extracellular enzyme activity, carbon mineralization rates, and ammonium mineralization rates), and organic soil properties (total organic carbon, total carbon and nitrogen, 16S ASV sequences, pH, and moisture). Together, this dataset provides context to understanding the impacts of different management practices and relevant disturbances, such as severe wildfire, on soil in the Southern Appalachian region.
Fine root dynamics along an elevational gradient in the southern Appalachian mountains in the Coweeta Hydrologic Laboratory from 1993 to 1994
Annual rates of fine root mass appearance and disappearance were calculated from samples of fine roots taken in soil cores over time on the five gradient plots.
Fine root dynamics along an elevational gradient in the southern Appalachian mountains in the Coweeta Hydrologic Laboratory from 1994 to 1995 (lengths of fine root segments)
The lengths of fine root segments visible in photographs of roots growing against the windows of minirhizotron boxes were measured.
Figure 17 in Five new species of Anillinus Casey from the Southern Appalachian Mountains and the Piedmont Plateau of eastern U.S.A. (Coleoptera: Carabidae: Trechinae: Bembidiini)
Figure 17. Locality records for the valentinei-group and cornelli-group species. Anillinus valentinei – red triangle; A. smokiensis – red quadrangle; A. chandleri – red star; A. cornelli – red circles.
Figure 16 in Five new species of Anillinus Casey from the Southern Appalachian Mountains and the Piedmont Plateau of eastern U.S.A. (Coleoptera: Carabidae: Trechinae: Bembidiini)
Figure 16. Locality records for the moseleyae-group (red color) and loweae-group species from Chilhowee and Starr Mountains (yellow color). Anillinus moseleyae – red quadrangles; A. carltoni, new species – red circle; A. unicoi – red star; A. juliae – yellow circle; A. chilhowee – yellow star.
Figure 11-15 in Five new species of Anillinus Casey from the Southern Appalachian Mountains and the Piedmont Plateau of eastern U.S.A. (Coleoptera: Carabidae: Trechinae: Bembidiini)
Figure 11-15. Illustrations of male aedeagus. 11) Anillinus unicoi (NC, Graham Co., Unicoi Mtns.). 12) A. carltoni (TN, Blount Co., GSMNP, Thunderhead Mtn.). 13) A. chilhowee (TN, Polk Co., Chilhowee Mtn.). 14) A. smokiensis (TN, Blount Co., GSMNP). 15) A. chandleri (SC, Edgefield Co., Sumter National Forest). a-Median lobe, right lateral aspect; b-Left paramere, left lateral aspect; c-Right paramere, right lateral aspect. Scale = 100 µm.
Figure 1-5. Habitus images. 1 in Five new species of Anillinus Casey from the Southern Appalachian Mountains and the Piedmont Plateau of eastern U.S.A. (Coleoptera: Carabidae: Trechinae: Bembidiini)
Figure 1-5. Habitus images. 1) Anillinus unicoi (NC, Graham Co., Unicoi Mtns.), holotype. 2) A. carltoni (TN, Blount Co., GSMNP, Thunderhead Mtn.), paratype. 3) A. chilhowee (TN, Polk Co., Chilhowee Mtn.), holotype. 4) A. smokiensis (TN, Blount Co., GSMNP), paratype. 5) A. chandleri (SC, Edgefield Co., Sumter National Forest), holotype.
Figure 6-10. Pronotum images. 6 in Five new species of Anillinus Casey from the Southern Appalachian Mountains and the Piedmont Plateau of eastern U.S.A. (Coleoptera: Carabidae: Trechinae: Bembidiini)
Figure 6-10. Pronotum images. 6) Anillinus unicoi (NC, Graham Co., Unicoi Mtns.). 7) A. carltoni (TN, Blount Co., GSMNP, Thunderhead Mtn.). 8) A. chilhowee (TN, Polk Co., Chilhowee Mtn.). 9) A. smokiensis (TN, Blount Co., GSMNP). 10) A. chandleri (SC, Edgefield Co., Sumter National Forest).
Variation in the relative effects of top-down and bottom-up forces on herbivores and herbivory along an elevational gradient in the southern Appalachian mountains in 2001
It is a well established fact that top-down (predation), bottom-up (resource availability) and lateral (interference) interactions are the dominant biotic forces in terrestrial ecosystems in addition to a host of other interactions like mutualism and symbiosis. The primary emphasis has always been to look for a singular mechanistic explanation in determining community dynamics. The ecological literature is replete with controversy on the subject of whether top-down or bottom-up forces predominate in ecosystems and their role in dynamics of ecological communities. The emerging consensus is that both top-down and bottom-up forces act in concert and the impetus is shifting towards the elucidation of the context, biotic and abiotic, under which these forces come into play. There are very few studies that have addressed this question and looked at the simultaneous interaction of these forces. I propose to study the effects of spatial heterogeneity in biotic and abiotic factors along an elevation gradient on the relative impacts of top-down and bottom-up forces and the result of their interactive effects on folivory. Specifically, I shall address the effects of spatial variation in plant quality and predation pressure and their interactive impacts on insect herbivore biomass and consumption. I shall also address the effects of complexity within/among trophic levels on the impact of these forces. The study aims to bring about a greater understanding of the role played by abiotic factors and complexity in community dynamics.
Gleditsia triacanthos (honey locust) field experiments in Southern Appalachian Mountains region
Gleditsia triacanthos seeds were planted at field sites in the Southern Appalachian Mountains region to examine whether recruitment was habitat limited. Sites contain mixed open (fields) and closed (early to mid-successional forest) habitats, and the riverine geomorphology includes riparian terraces and wet floodplain depressions. Three habitat types - forest edge, floodplain and riparian; were chosen to expose seeds to soil moisture, temperature and light gradients. Measurements of germination success, seedling height, soil moisture, soil temperature, diffuse light, and vegetation cover were taken.
Interactive effects of hemlock mortality and nitrogen availability on nutrient pools and fluxes in the southern Appalachian mountains from 2009 to 2011
The impacts of exotic insects and pathogens on forest ecosystems are increasingly recognized, yet the factors influencing the magnitude of effects remain poorly understood. Eastern hemlock (Tsuga canadensis) exerts strong control on nitrogen (N) dynamics, and its loss due to infestation by the hemlock woolly adelgid (Adelges tsugae) is expected to affect nutrient dynamics in impacted stands. We evaluated the potential for variation in N availability to influence the magnitude of effects of hemlock decline on N and P dynamics in mixed hardwood stands. We measured N and P pools and fluxes at three elevations (low, mid, high) subjected to increasing atmospheric N deposition where hemlock was declining or absent (as reference) in western North Carolina. Specifically, this study was conducted at Coweeta Hydrologic Laboratory, a USDA Forest Service experimental forest in the southern Appalachian mountains of western North Carolina, USA from October 2009 to February 2011.
Dynamics of summer stream temperature in the southern Appalachian Mountains following the removal of riparian rhododendron, 2014 to 2016.
Summer stream temperature was monitored at numerous locations along four streams before, and after, experimentally removing rhododendron from the riparian zones in 2014 to 2016. Two sites, Kit Springs (KS) and Rocky Bald (RB) were left unmanipulated as reference watersheds throughout the course of the study. Holloway (HW) and Split White Oak (SWO) served as the treatment watersheds, upon which rhododendron was removed. All sites are in the Nantahala National Forest, within in the White Oak Creek Watershed, which is apart of the Nantahala River drainage.
Leprocaulon beechingii (Leprocaulaceae), a new species from the southern Appalachian Mountains of eastern North America
<p><i>Leprocaulon beechingii</i> is described as new to science based on collections from exposed rock outcrops in the southern Appalachian Mountains in eastern North America. Taxonomic placement in <i>Leprocaulon</i>, and delimitation from other members of the genus with usnic acid, is supported by molecular phylogenetic analyses of ITS and mtSSU sequence data. The species is readily recognized by its occurrence on non-calcareous rocks, <i>normandinoides</i>-type placodioid thallus, and the production of usnic acid and zeorin.</p>
Leprocaulon beechingii (Leprocaulaceae), a new species from the southern Appalachian Mountains of eastern North America
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Data from: The role of glacial‐interglacial climate change in shaping the genetic structure of eastern subterranean termites in the southern Appalachian Mountains, USA
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Ecotone might provide key refugium for sky island mammals in the Southern Appalachian Mountains
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Fine root dynamics along an elevational gradient in the southern Appalachian mountains in the Coweeta Hydrologic Laboratory from 1993 to 1994
The seasonal dynamics of root mass were measured on five gradient plots by harvesting roots.
FIGURE 3 in Polycentropus dinkinsorum (Trichoptera: Polycentropodidae), a newly described caddisfly species from the southern Appalachian Mountains, USA
FIGURE 3. Sams Creek in Great Smoky Mountains National Park, Blount County, Tennessee, USA, on 5 June 2020, a representative habitat and collection site of Polycentropus dinkinsorum n. sp. Inset is a map of North America indicating site position (circle).
FIGURE 1. Polycentropus dinkinsorum n in Polycentropus dinkinsorum (Trichoptera: Polycentropodidae), a newly described caddisfly species from the southern Appalachian Mountains, USA
FIGURE 1. Polycentropus dinkinsorum n. sp., male genitalia. 1A, left lateral (with phallus removed). 1B, dorsal. 1C, segment IX and inferior appendages, ventral. 1D, phallus, left lateral. Abbreviations: d.p. = dorsobasal process of a preanal appendage (paired); hl. p. = horn-like apical projection of terga IX+X; inf. app. = inferior appendage (paired); int. app. = intermediate appendage (paired); IX+X = combined terga IX + X; mv. prot. = mesoventral protuberance; ph. sc. = phallic sclerite; pre. app. = preanal appendage (paired); s.IX = sternum IX.
FIGURE 2 in Polycentropus dinkinsorum (Trichoptera: Polycentropodidae), a newly described caddisfly species from the southern Appalachian Mountains, USA
FIGURE 2. Current recorded distribution of Polycentropus dinkinsorum n. sp. The square represents the holotype locality and circles represent other collection sites.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.