Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Tree physiological responses to above-ground herbivory directly modify below-ground processes of soil carbon and nitrogen cycling.
AU - Ayres, Edward
AU - Heath, James
AU - Possell, Malcolm
AU - Black, Helaina I. J.
AU - Kerstiens, Gerhard
AU - Bardgett, Richard D.
PY - 2004/6
Y1 - 2004/6
N2 - Above-ground herbivory is ubiquitous in terrestrial ecosystems, yet its impacts on below-ground processes and consequences for plants remain ambiguous. To examine whether physiological responses of individual trees may potentially modify soil nutrient availability, we subjected Fagus sylvatica L. (European beech) and Abies alba Mill. (silver fir) to simulated foliar herbivory over two growing seasons. Above-ground herbivory enhanced N mineralization and inorganic N availability in the soil. The total input of C from the plant roots to the soil is not known; however, carbon sequestration in the soil, measured using stable isotopic techniques, was unaffected by herbivory. Fagus responded to herbivory by producing larger leaves, with increased photosynthetic capacity and N content, which largely compensated for the loss of biomass; Abies exhibited no such response. We conclude that despite large interspecific differences in the growth response, tree physiological responses to foliar herbivory are capable of directly modifying soil biological processes.
AB - Above-ground herbivory is ubiquitous in terrestrial ecosystems, yet its impacts on below-ground processes and consequences for plants remain ambiguous. To examine whether physiological responses of individual trees may potentially modify soil nutrient availability, we subjected Fagus sylvatica L. (European beech) and Abies alba Mill. (silver fir) to simulated foliar herbivory over two growing seasons. Above-ground herbivory enhanced N mineralization and inorganic N availability in the soil. The total input of C from the plant roots to the soil is not known; however, carbon sequestration in the soil, measured using stable isotopic techniques, was unaffected by herbivory. Fagus responded to herbivory by producing larger leaves, with increased photosynthetic capacity and N content, which largely compensated for the loss of biomass; Abies exhibited no such response. We conclude that despite large interspecific differences in the growth response, tree physiological responses to foliar herbivory are capable of directly modifying soil biological processes.
KW - carbon sequestration
KW - forests
KW - herbivory
KW - microbial activity
KW - nitrogen mineralization
KW - nutrient cycling
KW - photosynthesis
KW - stomatal conductance
KW - YELLOWSTONE-NATIONAL-PARK
KW - MICROBIAL BIOMASS
KW - EXTRACTION METHOD
KW - MOUNTAIN FORESTS
KW - MOOSE HERBIVORY
KW - DEFOLIATION
KW - PLANTS
KW - FUMIGATION
KW - NUTRIENT
KW - PHOTOSYNTHESIS
U2 - 10.1111/j.1461-0248.2004.00604.x
DO - 10.1111/j.1461-0248.2004.00604.x
M3 - Journal article
VL - 7
SP - 469
EP - 479
JO - Ecology Letters
JF - Ecology Letters
SN - 1461-023X
IS - 6
ER -