| Abstract Detail
Ecological Section Thomas, Shyam [1], Thompson, Steven [2], Palmer, Michael W. [1]. The effect of mowing on species richness, turnover and speciescomposition of an Oklahoma grassland. We examine the effect of mowing on the species richness, turnover
(immigration and extinction rates) and composition of a grassland
community. The mowing regime varied in frequency (0, 1, 2 or 3 mowings per
year) and season of mowing (March, June, September). Richness peaked at
the triple mowing frequency and September season of mowing. Species
richness is negatively but weakly correlated with litter cover. Local
immigration and extinction rates appear to stabilize through time, with a
higher initial immigration rates across all treatments recorded in the
first years sampling, while the following year recorded the highest rates
of extinction for all treatments. Species composition of the control
treatment tend is much unlike the mown treatments, with tall forbs more
frequent in the control. Among the mowing treatments, there was a
discernible but subtle effect of early season and late season mowing on
species composition.
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1 - Oklahoma State University, Department of Botany, College of Arts and Sciences, 104 Life Sciences East, Stillwater, Oklahoma, 74078, USA
2 - North Western Oklahoma State University, Department of Natural Science, 709, Oklahoma Boulevard, Alva,, Oklahoma, 73717, USA
Keywords:
extinction rates
grassland
immigration rates
litter
mowing frequency
mowing season
species composition
species richness.
Presentation Type: Oral Paper
Session: 47-5
Location: Salon F - Austin Grand Ballroom/Hilton
Date: Wednesday, August 17th, 2005
Time: 11:15 AM
Abstract ID:205 |
