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113 results for “Coweeta Hydrologic Laboratory”
Continuously measured soil moisture, soil temperature, and air temperature from stations in Watershed 2, Coweeta Hydrologic Laboratory
Long-term soil moisture stations were established within the Coweeta Hydrologic Lab Basin to collect measurements of soil moisture, soil temperature, air temperature, and relative humidity at a range of spatial scales, from ridge to cove and low to high elevations in the southern Appalachians, and across the regional range of rainfall amounts.
Continuously measured soil moisture, soil temperature, and air temperature from stations in Watershed 5, Coweeta Hydrologic Laboratory
Long-term soil moisture stations were established within the Coweeta Hydrologic Lab Basin to collect measurements of soil moisture, soil temperature, air temperature, and relative humidity at a range of spatial scales, from ridge to cove and low to high elevations in the southern Appalachians, and across the regional range of rainfall amounts.
Continuously measured soil moisture, soil temperature, and air temperature from stations in Watershed 7, Coweeta Hydrologic Laboratory
Long-term soil moisture stations were established within the Coweeta Hydrologic Lab Basin to collect measurements of soil moisture, soil temperature, air temperature, and relative humidity at a range of spatial scales, from ridge to cove and low to high elevations in the southern Appalachians, and across the regional range of rainfall amounts.
Continuously measured soil moisture, soil temperature, and air temperature from a side-slope station located in Watershed 27, Coweeta Hydrologic Laboratory
Long-term soil moisture stations were established within the Coweeta Hydrologic Lab Basin to collect measurements of soil moisture, soil temperature, air temperature, and relative humidity at a range of spatial scales, from ridge to cove and low to high elevations in the southern Appalachians, and across the regional range of rainfall amounts.
Continuously measured soil moisture, soil temperature, and air temperature from a ridge station in Watershed 18, Coweeta Hydrologic Laboratory
Long-term soil moisture stations were established within the Coweeta Hydrologic Lab Basin to collect measurements of soil moisture, soil temperature, air temperature, and relative humidity at a range of spatial scales, from ridge to cove and low to high elevations in the southern Appalachians, and across the regional range of rainfall amounts.
Continuously measured soil moisture, soil temperature, and air temperature from stations in Watershed 32, Coweeta Hydrologic Laboratory
Long-term soil moisture stations were established within the Coweeta Hydrologic Lab Basin to collect measurements of soil moisture, soil temperature, air temperature, and relative humidity at a range of spatial scales, from ridge to cove and low to high elevations in the southern Appalachians, and across the regional range of rainfall amounts.
Continuously measured soil moisture, soil temperature, and air temperature from stations in Watershed 36, Coweeta Hydrologic Laboratory
Long-term soil moisture stations were established within the Coweeta Hydrologic Lab Basin to collect measurements of soil moisture, soil temperature, air temperature, and relative humidity at a range of spatial scales, from ridge to cove and low to high elevations in the southern Appalachians, and across the regional range of rainfall amounts.
Riparian study of dissolved organic carbon at the Coweeta Hydrologic Laboratory from 1993 to 2001
None Available. Researcher has not submitted information.
Microbial biomass at the Coweeta Hydrologic Laboratory in 1994
All of the data originated in the riparian watershed (WS 55) at Coweeta. Thus far, all soil data occurred in 1994 - ie. before the rhododendron removal. The summary C and N files are saved by date (year, month,and day). Within each file are data for Microbial carbon and nitrogen. The sample names (ex. C1-1, 0-5) indicate control plot, 1 meter distance from the stream, sample number 1, at the 0-5 cm soil depth, and so on. T would indicate treatment plot and 5-10 indicates the 5-10 cm soil depth. Within each plot (C and T), we established three transects, 10 meters in length, at 1, 5, and 15 meter distances upslope from a stream. Along each transect, 4 samples were collected and each sample consisted of two bulked soil cores, separated by depth (0-5 cm and 5-10 cm). All sampling dates were in 1994, beginning in March. Sample dates were selected to correspond with seasonal changes and occurred March 25, June 16, August 16, November 1, and December 16. Microbial C data is listed as microgram C per gram dry weight soil, followed by an average of C (measured by distance from the stream) and standard deviation corresponding to that average. ND listed in the Project indicates that the sample needs to be reanalyzed or was missing. The december Project needs more work, but I have included it anyway. Microbial nitrogen is listed as microgram of total persulfate N per gram dry weight soil. This is again followed by an average N value by distance from the stream and depth of the soil and the corresponding standard deviation.
Benthic organic matter (BOM) standing crops along the Ball Creek / Coweeta Creek elevational gradient at the Coweeta Hydrologic Laboratory from 1991 to 1992
We investigated how benthic organic matter (BOM) standing CR varied over space and time in the context of an elevational stream-size gradient. Samples were collected with a stratified random procedure to also study how BOM varied with respect to the major habitat patches within the stream. Habitat patch include cobble-riffle, sandy-reach, and rock. Benthic organic matter was collected efuarterly from streams draining a 9-yr-old clearcut, an 18-yr-old "old-field", a 25-yr-old successional forest, and two reference watersheds at Coweeta Hydrologic Laboratory in the Appalachian Mountains of North Carolina, USA. Samples were separated into large benthic organic matter (LBOM >1 mm) and fine benthic organic matter (FBOM <1 mm). An additional survey of large (>5 cm diam.) and small (1-5 cm diam.) wood was conducted. This study was conducted from 1991 to 1992.
Mesoscale variation in fish populations in two small Appalachian streams (fish population data) at the Coweeta Hydrologic Laboratory in 1996
We examined the reach-scale distributions of three fish species to determine which biotic and abiotic factors are influential in the fishes distributions.
Intensive Stream Survey Geomorphology Data from 2010 to 2011 at the Coweeta Hydrologic Laboratory, Otto, NC
From June 2010 until February 2011, fifty streams were surveyed to determine the physical characteristics of streams in forested, traditional land use, and developed settings. Cross-sectional measurements were taken at 16 cross-sections on each reach. The distance between each cross-section was twice the average active channel width (which was determined prior to the survey). At one to three locations within each surveyed reach, slope was determined by placing a laser level at a location upstream and then measuring the amount of elevation change at the water surface. Between each cross-section, the instream habitat was recorded. Large woody debris was measured where it was found within the surveyed reach of the stream. Only LWD with diameter >10 cm was measured. At a representative riffle within the reach, a Wolman pebble count (100 randomly selected pieces of sediment) was taken.
Mesoscale variation in fish populations in two small Appalachian streams (light data) at the Coweeta Hydrologic Laboratory in 1996
We examined the reach-scale distribution of macroinvertebrates to determine if photosynthetically active radiation (PAR) is influential in the distribution of the macroinvertebrates and macroinvertebrate functional feeding groups.
Stream fish assemblage stability in a southern Appalachian stream at the Coweeta Hydrologic Laboratory from 1984 to 1995
Stream fish abundance data was collected seasonally in three 30m sections of stream from 1984 to 1995. Population estimates were obtained using electrofishing (3 pass removal). Habitat availability measurements were recorded biannually along with the electrofishing data starting in fall 1988. Data was collected each fall and spring from 1988-1995, in order to examine changes in fish assemblage structure along the habitat gradient. We used strong inference with Akaike’s Information Criterion (AIC) to assess the processes capable of explaining long-term (1984–1995) variation in the per capita rate of change of mottled sculpin (Cottus bairdi) populations in the Coweeta Creek drainage (USA). We sampled two fourth- and one fifth-order sites (BCA [uppermost], BCB, and CC [lowermost]) along a downstream gradient, and the study encompassed extensive flow variation.
Assessment of parentage relationships in Cottus bairdi at the Coweeta Hydrologic Laboratory in 1999
None submitted by researchers.
Changes in incident light intensity to streams with progressive hemlock mortality at 5 Coweeta Hydrologic Laboratory study sites from 2005 to 2015
The purpose of this study was to document changes in light intensity to streams in areas affected by hemlock mortaity. From June 2005 to November 2015, relative light intensity at 5 locations along each stream reach was monitored every 5 minutes. This study was conducted at Coweeta Hydrologic Laboratory. Five stream sites were located on 1st - 2nd order streams reaches affected by hemlock death. All sites were located in areas that have not been logged since the area became National Forest in the late 1920s and where streams passed through or were adjacent to permanent vegetation plots in which trees were measured in 1934-35, 1969-73 and 1988-93 (Elliott and Swank, 2008.)
Stream salamander mark-recapture abundance study at the Coweeta Hydrologic Laboratory, Otto, NC.
Mark-recapture data of the stream-dwelling plethodontid salamander species located in six streams within the Coweeta LTER site. The data covers the periods of May to August 2007 and 2008. Animals were either captured and given an individual mark using elastomer dye, or simply counted if animals were too small in size to mark. Animals were captured within 10, 1 m^2 plots within each stream using a 40 X 40 cm mesh bag filled with hardwood leaf litter, or by dipnet within each plot. Animals were identified, measured, marked, and released directly following capture.
Stem temperature in watershed 02, ridge plot at the Coweeta Hydrologic Laboratory from 1996 to 1998
Tree stem temperature is currently being collected to determine both diurnal and seasonal variation in tree stem temperatures for all species and sizes present at the Coweeta Watershed 2 Ridge Carbon Flux Plot. The purpose of the data is to characterize the tree stem temperature regimes as they relate to tree stem respiration. Data will continue to be collected until approximately December 1997. Data will then be subsequently summarized and published.
The importance of crayfish in the breakdown of rhododendron leaf litter at the Coweeta Hydrologic Laboratory in 1999
Rhododendron (Rhododendron maximum) is a common evergreen shrub in riparian areas of the southern Appalachians, where its leaves can comprise a large proportion of leaf litter in streams. However, they are relatively refractory and generally considered a low quality food resource for detritivores. Our objective was to assess whether macroconsumers (primarily crayfish (Cambarus bartonii)) influence rhododendron leaf breakdown in a forested southern Appalachian stream in both summer (when leaves other than rhododendron are relatively scarce) and autumn (when other leaves are relatively abundant). We conducted two leaf decay experiments, one in summer and one in autumn, using pre-conditioned leaves. Macroconsumers were excluded from the benthos of a fourth-order stream using electric fences; we predicted that excluding macroconsumers would reduce the decay rate of rhododendron leaves in both summer and autumn.
Top-down interactions in streams draining human-modified landscapes at the Coweeta Hydrologic Laboratory from 1997 to 1998: Gradient algae data
Spatial and temporal variability of consumer-controlled forces have been the subject of much debate in ecology. To date, most studies considering variability of these top-down interactions have focused on systems minimally impacted by human activities. However, human modification of the landscape is prevalent, and it can significantly affect the strength and outcome of species interactions. The objective of this study was to examine how top-down interactions vary among streams with differing amounts of human disturbance in their watersheds. To address this issue, we experimentally excluded macroconsumers (fishes and crayfishes) from benthic areas of five southern Appalachian streams. These sites represented a range of human watershed development, from 100% to < 50% forested; macroconsumer assemblages at low development sites were dominated by benthic insectivores (Cottus bairdi) and crayfishes, whereas algivores (Campostoma anomalum) and general insectivores (e.g., Notropis leuciodus) were common at more developed sites. Using ceramic tiles as sampling substrates, we compared sediment, algal assemblages (chlorophyll a, AFDM, abundance, biovolume, and composition), and insect assemblages (abundance, biomass, and composition) in macroconsumer exclusion and control areas.
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