SHAREOK Repository
Not a member yet
49261 research outputs found
Sort by
LibQUAL+ 2022 Survey : University of Central Oklahoma
Get PDFLibQUAL+ provides a protocol for bechmarking perceptions of library service quality. These reports contain the results and comments from participants providing feedback about the Max Chambers Library in 2022
Precipitation effects on grassland plant performance are lessened by hay harvest
No full textClimate and human management, such as hay harvest, shape grasslands. With both disturbances
co-occurring, understanding how these ecosystems respond to these combined drivers may aid in
projecting future changes in grasslands. We used an experimental precipitation gradient combined
with mimicked acute hay harvest (clipping once a year) to examine (1) whether hay harvest
influences precipitation effects on plant performance (cover and height) and (2) the role of interspecific
responses in influencing plant performance. We found that hay harvest reduced the strength
of precipitation effects on plant performance through changes in bare-ground soil cover. Species
performance were mainly influenced by change in abiotic factors, often responding negatively, as
hay harvest increased bare-ground amount. Conversely, altered precipitation without hay harvest
promoted plant species performance through abiotic factors change first, followed by biotic. Most
species, including the dominant grass Schizachyrium scoparium, increased their performance with
greater leaf area index (proxy for canopy structure). Our experiment demonstrates that plant
performance responds directly to abiotic factors with hay harvest, but indirectly without hay harvest.
Positive effects of increasing precipitation were likely due to microhabitat amelioration and resource
acquisition, thus inclusion of hay harvest as a disturbance lessens positive impacts of biotic variables
on species performance to climate change.University of Oklahoma Faculty Investment Program (FIP) and NSF ESPSCoR Research Infrastructure Improvement Award No. OIA-1301789YesThis dataset is part of the agreement with journal publisher for data shar