Changes in allozyme frequencies in Festuca ovina populations after a 9-year nutrient/water experiment
Prentice, Honor C LU
; Lönn, M
; Lager, H
; Rosen, E
and Van Der Maarel, E
(2000)
In Journal of Ecology
88(2).
p.331-347
- Abstract
- 1 The grass Festuca ovina is an important constituent of the species-rich 'alvar' grasslands on the Baltic island of Oland. Levels of allozyme polymorphism are high and variation is known to be correlated with habitat variation (soil moisture, pH and depth). 2 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). 3 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... (More)
- 1 The grass Festuca ovina is an important constituent of the species-rich 'alvar' grasslands on the Baltic island of Oland. Levels of allozyme polymorphism are high and variation is known to be correlated with habitat variation (soil moisture, pH and depth). 2 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). 3 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). 4 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. 5 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. 6 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/147348
- author
- Prentice, Honor C
LU
; Lönn, M
; Lager, H
; Rosen, E
and Van Der Maarel, E
- organization
- publishing date
- 2000
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Ecology
- volume
- 88
- issue
- 2
- pages
- 331 - 347
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:0343618396
- ISSN
- 1365-2745
- DOI
- 10.1046/j.1365-2745.2000.00454.x
- language
- English
- LU publication?
- yes
- id
- 1aafa34a-49c4-4e23-af71-5d79399b33c6 (old id 147348)
- date added to LUP
- 2016-04-01 12:14:19
- date last changed
- 2022-01-27 00:49:43
@article{1aafa34a-49c4-4e23-af71-5d79399b33c6,
abstract = {{1 The grass Festuca ovina is an important constituent of the species-rich 'alvar' grasslands on the Baltic island of Oland. Levels of allozyme polymorphism are high and variation is known to be correlated with habitat variation (soil moisture, pH and depth). 2 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). 3 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). 4 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. 5 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. 6 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.}},
author = {{Prentice, Honor C and Lönn, M and Lager, H and Rosen, E and Van Der Maarel, E}},
issn = {{1365-2745}},
language = {{eng}},
number = {{2}},
pages = {{331--347}},
publisher = {{Wiley-Blackwell}},
series = {{Journal of Ecology}},
title = {{Changes in allozyme frequencies in Festuca ovina populations after a 9-year nutrient/water experiment}},
url = {{http://dx.doi.org/10.1046/j.1365-2745.2000.00454.x}},
doi = {{10.1046/j.1365-2745.2000.00454.x}},
volume = {{88}},
year = {{2000}},
}