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Showing 1 to 15 of 15 for “"Coweeta"”.
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Nitrate Sorption in the Soils of the Coweeta Hydrologic Laboratory
… watersheds. We examined four watersheds at Coweeta Hydrologic Laboratory (CHL) and determined that soil NO3- sorption is a mechanism for abiotic NO3- retention. NO3- sorption was best described with an S-shaped, sigmoidal model for B horizons that suggests that NO3- sorption to soil …
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Leveraging the Landsat Archive to Track Understory Evergreen Shrub Expansions in the Coweeta Basin, North Carolina
… documented evergreen shrub expansion across the Coweeta Creek basin over the past 36 years analyzing changes in winter greenness using harmonized multi-decadal archives of Landsat imagery. We found the greatest change in winter greenness in relatively dry areas: higher elevations (1275–1300 m), …
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Effects of land use on oxygen uptake by microorganisms on fine benthic organic matter in two Appalachian mountain streams
… land use patterns on microbial respiration. Both Coweeta Creek in western North Carolina, and Wolf Creek in western Virginia, flow through national forest, agricultural land and scattered residential areas. Seven sites were sampled at six to ten week intervals over one year. Land use was …
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Environmental controls on the abundance, diversity, growth, and activity of ammonia-oxidizing microorganisms in temperate forest soils
… plant systems. All of my field work was done at Coweeta Hydrologic Laboratory, a Forest Service Station and Long Term Ecological Research Site near Otto, NC. Watershed-level land use manipulations have been performed at Coweeta since the 1930s, including clear-cutting, fertilizing, liming, …
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Effects of acidification on the crayfish Cambarus bartonii bartonii in southern Appalachian streams
… primarily from May through October, 1985 at Coweeta Hydrologic Laboratory (U. S. Forest Service Southeastern Experimental Station) in Otto, North Carolina, to describe selected population parameters and life history events for this species in two first-order streams. Laboratory experiments …
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The Impact of Urbanization on Benthic Macroinvertebrates in Southern Appalachian Streams
… Primary funding for this project was from the Coweeta Hydrologic Lab NSF-LTER grant. Additional funding was provided through a Graduate Research and Development Project grant from the Graduate Student Assembly of Virginia Polytechnic Institute and State University. Matching funds were provided …
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The diet and growth of a leaf-shredding caddisfly, Pycnopsyche, in streams of contrasting disturbance histories
… and a 16-year-old c1earcut (disturbed) forest at Coweeta Hydrologic Laboratory in southwestern North Carolina. The objective was to examine whether Pycnopsyche larvae grew better on fast-decaying leaf types more prevalent in the disturbed streams (e.g., black birch) because leaf-eating insects …
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The Role of Leaf Litter and Small Wood in the Retention of Fine Particles During Storms in an Appalachian Headwater Stream
… unquantified. The litter exclusion study at Coweeta presented the opportunity to study a stream without litter input. I expected removal of leaf litter to reduce the capacity of the stream to retain fine particulate organic matter, FPOM. However, leaves are also a major source of FPOM. I …
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Hydrologic modeling as a decision-making tool in wildlife management
… country. AGNPS was applied to a watershed at the Coweeta Hydrologic Laboratory in North Carolina. After adjustments, a baseline run was made, then the model was manipulated to simulate and compare several hypothetical management scenarios. This study demonstrated the potential utility of …
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Microbial respiration on decaying leaves and sticks along an elevational gradient of a southern Appalachian stream
… order) sites along an elevational gradient at Coweeta Hydrologic Laboratory, North Carolina. Rhododendron and birch leaves were placed in mesh bags in the stream at each site on 21 Oct 90. Oxygen uptake rates were measured for both leaf species beginning 15 Dec 90 and continuing monthly until …
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Microbial Communities Colonizing Leaves during Early Decomposition Stages
… schreberiana</em> leaves in June 2012 and at the Coweeta Long Term Ecological Research site using <em>Acer rubrum</em> and <em>Quercus prinus</em> leaves in June 2013. Laboratory trials using the same leaf types were set up in experimental chambers to model the systems found in these two regions. …
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Modeling Forest Canopy Distribution from Ground-Based Laser Scanner Data
… plot located in upland deciduous forest at Coweeta, NC was assessed with 41 and 45 scans gathered during periods of leaf-on and leaf-off, respectively. Data management and summary needs were addressed, focusing on the development of registration methods to align point clouds collected from …
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Effects of experimentally-altered hydrology on ecosystem function in headwater streams
… to downstream sections of three streams at the Coweeta Hydrologic Laboratory in NC to assess changes to function in perennial ecosystems. The questions that I addressed included: 1) How is organic matter decomposition regulated by changes to the availability of water? and 2) How does the …
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Microbial activity on wood in streams: exploring abiotic and biotic factors affecting the structure and function of wood biofilms
… of leaf litter in 2 small mountain streams at Coweeta Hydrologic Laboratory in the southern Appalachians. Microbial respiration, fungal biomass, extracellular enzyme activity, and the effect of nutrient addition were used as descriptors of wood biofilms. Exclusion of leaf litter from a …
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In-Stream Hemlock Twig Breakdown and Effects of Reach-Scale Twig Additions on Appalachian Headwater Streams
Eastern hemlock (Tsuga canadensis) is a prominent tree in the forests of eastern North America, where it commonly grows along headwater streams. It is experiencing widespread mortality due to infestations of an introduced insect, the hemlock woolly adelgid (Adelges tsugae). Eliminations of tree …