Full TGIF Record # 64665
Item 1 of 1
Web URL(s):http://www.jstor.org/stable/pdf/2648534.pdf
    Last checked: 10/06/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Prentice, Honor C.; Lönn, Mikael; Lager, Helena; Rosén, Ejvind; van der Maarel, Eddy
Author Affiliation:Prentice and Lager: Department of Systematic Botany, Lund University, Lund, Sweden; Lönn, Rosén, and van der Maarel: Department of Plant Ecology, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden
Title:Changes in allozyme frequencies in Festuca ovina populations after a 9-year nutrient/water experiment
Section:Standard papers
Other records with the "Standard papers" Section
Source:Journal of Ecology. Vol. 88, No. 2, April 2000, p. 331-347.
Publishing Information:Blackwell Scientific Publications
# of Pages:17
Keywords:TIC Keywords: Festuca ovina; Nutrients; Water; Chromosome polymorphism; Diversity; Population dynamics; Grasslands; Alleles; Models; Genetic variability; Clippings; Height
Abstract/Contents:"The grass Festuca ovina is an important constituent of the species-rich 'alvar' grasslands on the Baltic island of Ă–land. Levels of allozyme polymorphism are high and variation is known to be correlated with habitat variation (soil moisture, pH and depth). A 9-year field experiment on species diversity provided replicate plots (in three sites) that had been subjected to six different experimental treatments (control; N+P+K; P+K; N+K; K; water). Samples of F. ovina were collected and analyses of deviance were used to investigate associations between allele frequencies, at each of four polymorphic loci,and the nutrient/water treatments. We also used the models to estimate predicted values for the alleles in different nutrient/water treatments and in interactions involving the nutrient/water treatments and additional explanatory variables (vegetation height and clipping). There were significant allozyme frequency differences between samples of F. ovina from the six different nutrient/water treatments in the grassland experiment. Frequencies in the fertilized or watered plots had diverged from those in the control plots. There were also significant allele-habitat associations (after the removal of site effects), especially at the Pgi-2 locus. Soil moisture was the only variable that was common to this study and an earlier study of variation in F. ovina in natural habitats. In natural populations, the Pgi-2-2 allele was significantly associated with soil moisture and was more common in dry habitats. Our findings that the frequency of the Pgi-2-2 allele was significantly affected by the nutrient/water treatments, and that it was rarest in the treatment that involved the addition of extra water, were therefore as predicted. The study supports the conclusion, from an earlier study of populations in unmanipulated grassland habitats, that selection is contributing to the fine-scale patterning of genetic variation in the alvar populations of F. ovina.
Language:English
References:75
Note:Figures
Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Prentice, H. C., M. Lönn, H. Lager, E. Rosén, and E. van der Maarel. 2000. Changes in allozyme frequencies in Festuca ovina populations after a 9-year nutrient/water experiment. J. Ecol. 88(2):p. 331-347.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=64665
If there are problems with this record, send us feedback about record 64665.
Choices for finding the above item:
Web URL(s):
http://www.jstor.org/stable/pdf/2648534.pdf
    Last checked: 10/06/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
Find Item @ MSU
MSU catalog number: QH 540 .J6
Find from within TIC:
   Digitally in TIC by record number.
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)