Long-term effects of short-term perturbation in a subalpine grassland

Research output: Contribution to journalArticle

Standard

Long-term effects of short-term perturbation in a subalpine grassland. / Spiegelberger, T; Hegg, O; Matthies, D; Hedlund, Katarina; Schaffner, U.

In: Ecology, Vol. 87, No. 8, 2006, p. 1939-1944.

Research output: Contribution to journalArticle

Harvard

APA

CBE

MLA

Vancouver

Author

Spiegelberger, T ; Hegg, O ; Matthies, D ; Hedlund, Katarina ; Schaffner, U. / Long-term effects of short-term perturbation in a subalpine grassland. In: Ecology. 2006 ; Vol. 87, No. 8. pp. 1939-1944.

RIS

TY - JOUR

T1 - Long-term effects of short-term perturbation in a subalpine grassland

AU - Spiegelberger, T

AU - Hegg, O

AU - Matthies, D

AU - Hedlund, Katarina

AU - Schaffner, U

PY - 2006

Y1 - 2006

N2 - Theoretical advances and short-term experimental studies have furthered our understanding of how ecosystems respond to perturbation. However, there are few well-replicated experimental studies that allow an assessment of long-term responses. Results from a controlled, large-scale field experiment in a subalpine grassland near Interlaken, Switzerland, show that 2-4 years of liming (Ca: 40 g center dot m(-2)center dot yr(-1)) still significantly affected the composition of the vegetation and the soil microbial community nearly 70 years after the treatments were imposed, whereas NPK fertilization (8 g center dot m(-2)center dot yr(-1)) only marginally affected vegetation composition. The exchangeable content of Ca ions and soil pH were higher in limed plots but were unaffected in fertilized plots. Plant species and PLFAs (phospholipid fatty acids) indicating low pH values were found in higher abundance in the unlimed plots, suggesting that the long-lasting effects of liming on the above- and belowground communities were mediated through changes in soil pH. The results of this long-term study indicate that the resilience of mountain ecosystems may be particularly low in response to perturbations that substantially alter soil pH or other key determinants of belowground processes.

AB - Theoretical advances and short-term experimental studies have furthered our understanding of how ecosystems respond to perturbation. However, there are few well-replicated experimental studies that allow an assessment of long-term responses. Results from a controlled, large-scale field experiment in a subalpine grassland near Interlaken, Switzerland, show that 2-4 years of liming (Ca: 40 g center dot m(-2)center dot yr(-1)) still significantly affected the composition of the vegetation and the soil microbial community nearly 70 years after the treatments were imposed, whereas NPK fertilization (8 g center dot m(-2)center dot yr(-1)) only marginally affected vegetation composition. The exchangeable content of Ca ions and soil pH were higher in limed plots but were unaffected in fertilized plots. Plant species and PLFAs (phospholipid fatty acids) indicating low pH values were found in higher abundance in the unlimed plots, suggesting that the long-lasting effects of liming on the above- and belowground communities were mediated through changes in soil pH. The results of this long-term study indicate that the resilience of mountain ecosystems may be particularly low in response to perturbations that substantially alter soil pH or other key determinants of belowground processes.

U2 - 10.1890/0012-9658(2006)87[1939:LEOSPI]2.0.CO;2

DO - 10.1890/0012-9658(2006)87[1939:LEOSPI]2.0.CO;2

M3 - Article

VL - 87

SP - 1939

EP - 1944

JO - Ecology

JF - Ecology

SN - 0012-9658

IS - 8

ER -