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10 results for “University of Kansas”
Nutrient amendment effects on phytoplankton, water chemistry, and cyanotoxins in the 2018 Large-Scale Mesocosm Experiment at the University of Kansas Field Station
This dataset includes water physicochemical parameters, phytoplankton community composition, and cyanobacteria metabolites collected during a 21-day nutrient amendment experiment conducted from 23 July to 13 August 2018 at the University of Kansas Biological Station, Lawrence, KS, United States (39.049674°N, 95.190777°W). The experiment was performed using 18 large-scale, closed-bottom fiberglass tanks (volume: 11,000 L; height: 1.25 m; diameter: 3 m). Three tanks served as ambient controls (CON), while the others received one of the following nutrient treatments: nitrogen only (280 µM) as either ammonium chloride (NH4) or sodium nitrate (NO3); nitrogen (280 µM) plus phosphorus (200 µM) as either ammonium chloride + dipotassium phosphate (NHP) or sodium nitrate + dipotassium phosphate (NOP); and phosphorus only (200 µM) as dipotassium phosphate (P). Each tank received an initial nutrient dose on Day 0.5, followed by weekly additions of 20% of the initial amendment to maintain treatment conditions. All data were quality controlled to correct basic errors and to remove measurements outside the manufacturer’s standard operational ranges.
University of Kansas Field Station: Water level and ice cover at Frank B. Cross Reservoir (Kansas, USA) 1993 - 2016
This database is from regular monitoring of water level and surface ice cover at Frank B. Cross Reservoir, a small freshwater impoundment in northeastern Kansas (USA). Cross Reservoir, located at the University of Kansas Field Station near Lawrence (KS), has a 3-ha surface area and a maximum depth of 12 m. Measurements of water elevation and estimates of ice cover were made at semi-monthly intervals (i.e., roughly every two weeks). The first data were taken in December 1993, shortly after the reservoir was constructed and first filled to capacity. Water levels were measured relative to a permanent water control structure. Ice cover observations were visual estimates of the percent (%) surface of the reservoir covered with ice. Water level measurements and ice cover estimates are made at the same time. This database is updated periodically and maintenance is ongoing.
University of Kansas Field Station: Forest demography, 1980 – 2015. On ten study plots established on three management units all live trees with a dbh > 7.5 cm (3 in) were identified to species, measured, and tagged. Trees were initially measured in 1980/1981 and re-measured in three successive time periods: 1993/95; 2002/03; and 2014/15. Trees will be measured again in 2025/26.
In 1980 researchers at the University of Kansas initiated a long-term experiment monitoring the composition of oak-hickory forest communities at the University’s field station near Lawrence, Kansas. The purpose of the study was to determine how forest species composition varied temporally across distinct habitats that varied in topography, elevation, sun exposure, management history and successional stage. Ten permanent sites were sampled approximately each decade with data collection periods of 1980/81, 1993/95, 2002/03, and 2014/15. Trees with a minimum diameter at breast height (dbh) of ≥ 7.5 cm were tagged, identified to species and measured. Trees will be measured again in 2025/26.
University of Kansas Field Station: Water temperature profiles at Frank B. Cross Reservoir (Kansas, USA) 1993-2016
These vertical profiles of water temperature data are from Frank B. Cross Reservoir, a small freshwater impoundment in northeastern Kansas (USA). Cross Reservoir, located at the University of Kansas Field Station near Lawrence (KS), has a 3-ha surface area and a maximum depth of 12 m. Temperature data were collected at discrete depths in a vertical profile using a Water Quality Checker U-10 (Horiba Instruments, Kyoto, Japan). These temperature data were collected in conjunction with ecological studies at Cross Reservoir examining deep-dwelling, vertically-migrating phytoplankton communities that form a deep chlorophyll maxima, especially during times of thermal stratification. Therefore, the most frequent sampling dates occurred in July, August, September and October during thermal stratification when vertically migrating deep algae were most common (other months were sampled less frequently through the years). Cross Reservoir has high water clarity due to its watershed vegetation and physical (protected) setting. Thermal stratification begins each year in April, and complete mixing occurs during November. The bottom of the epilimnion is typically located at 3 m in July and usually deepens to approximately 9 m by late November. The bottom of the epilimnion is defined here as the bottom of the first 1 m depth interval that exhibited a >1 C temperature decrease per meter. The water column also consistently exhibits strong chemical stratification during the summer months. Sporadic ice cover can occur during December–February.
Context dependence of grassland plant mycorrhizal response, University of Kansas, 2021
Many of the disturbance-sensitive, late successional plant species in grasslands respond to arbuscular mycorrhizal (AM) fungi more positively via growth and establishment than plants that readily establish in disturbed areas (i.e. early successional species). Inoculation with AM fungi can therefore aid the establishment of late successional species in disturbed areas. If the differential benefit of AM fungi to late vs. early successional plants is context-dependent, however, this advantage could be diminished in high phosphorus (P) post-agricultural soils or in future climates with altered precipitation. In this greenhouse experiment, we tested if late successional plant species are less plastic in their reliance on AM fungi than early successional plants by growing 17 tallgrass prairie plant species of different successional status (9 early and 8 late successional) in full factorial combinations of inoculated or uninoculated with AM fungi, with ambient or high P levels, and with low or high levels of water.
Kansas University DHA Outcome Study (KUDOS) Follow-Up
ClinicalTrials.gov study NCT02487771. IPD Sharing: Not stated. Countries: 1. Publications: 2.
University of Kansas Field Station: Cumulative field records of snake species collected by Dr. Henry S. Fitch 1948 - 2003, with a few additional records collected 2004 - 2016. Records contain capture locations, measurements, notes on reproduction, recapture, and growth data. This data package contains individual files for 14 species.
Dr. Henry S. Fitch began his pioneering research on the snake fauna of the Fitch Natural History Reservation and adjacent University of Kansas Field Station in 1948. Fitch remained an active researcher until the early 2000s. For nearly six decades he conducted extensive field work on snakes using capture/recapture techniques, and compiled other biological data as well (e.g., all snakes captured were weighed, measured, and marked with incomplete data collected on reproduction, stomach contents, and recaptures). This research resulted in scores of scientific publications on the ecology of the snakes. Henry S. Fitch died in 2009 and left as a legacy hand-written data sheets with approximately 60,000 capture records. George R. Pisani, a biologist at the University of Kansas and later at the Kansas Biological Survey, collaborated with Fitch on some ecological studies. Beginning about 2005, Pisani began the many-year process of converting the thousands of Fitch’s records of snake captures into an electronic database. This work was funded in part by the Kansas Dept. of Wildlife, Parks and Tourism Chickadee Checkoff Program.
Atmospheric aerosol, gases and meteorological parameters measured during the LAPSE-RATE campaign - Kansas State University data sets
<p>This publication summarizes the measurements and data sets generated by Kansas State University (KSU) during the LAPSE-RATE that took place in the San Luis Valley of Colorado during the summer of 2018. These data sets offer observations of atmospheric aerosols at the surface and in vertical column acquired by KSU rotary-wing Unmanned Aerial System. </p>
Kansas University Teen Mothers Project
ClinicalTrials.gov study NCT00222118. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Brain Aging Project--Kansas University
ClinicalTrials.gov study NCT00267124. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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