Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability
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Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability. / Craine, J M; Elmore, A J; Aidar, M P M; Bustamante, M; Dawson, T; Hobbie, E A; Kahmen, A; Mack, M C; McLauchlan, K K; Michelsen, Anders; Nardoto, G B; Pardo, L H; Penuelas, J; Reich, P B; Schuur, E A G; Stock, W D; Templer, P H; Virginia, R A; Welker, J M; Wright, I J.
In: New Phytologist, Vol. 183, No. 4, 2009, p. 980-992.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Global patterns of foliar nitrogen isotopes and their relationships with climate, mycorrhizal fungi, foliar nutrient concentrations, and nitrogen availability
AU - Craine, J M
AU - Elmore, A J
AU - Aidar, M P M
AU - Bustamante, M
AU - Dawson, T
AU - Hobbie, E A
AU - Kahmen, A
AU - Mack, M C
AU - McLauchlan, K K
AU - Michelsen, Anders
AU - Nardoto, G B
AU - Pardo, L H
AU - Penuelas, J
AU - Reich, P B
AU - Schuur, E A G
AU - Stock, W D
AU - Templer, P H
AU - Virginia, R A
AU - Welker, J M
AU - Wright, I J
N1 - KEYWORDS climate • isotopes • mycorrhizal fungi • nitrogen • nitrogen availability
PY - 2009
Y1 - 2009
N2 - Ratios of nitrogen (N) isotopes in leaves could elucidate underlying patterns of N cycling across ecological gradients. To better understand global-scale patterns of N cycling, we compiled data on foliar N isotope ratios (d15N), foliar N concentrations, mycorrhizal type and climate for over 11 000 plants worldwide. Arbuscular mycorrhizal, ectomycorrhizal, and ericoid mycorrhizal plants were depleted in foliar d15N by 2‰, 3.2‰, 5.9‰, respectively, relative to nonmycorrhizal plants. Foliar d15N increased with decreasing mean annual precipitation and with increasing mean annual temperature (MAT) across sites with MAT = -0.5°C, but was invariant with MAT across sites with MAT < -0.5°C. In independent landscape-level to regional-level studies, foliar d15N increased with increasing N availability; at the global scale, foliar d15N increased with increasing foliar N concentrations and decreasing foliar phosphorus (P) concentrations. Together, these results suggest that warm, dry ecosystems have the highest N availability, while plants with high N concentrations, on average, occupy sites with higher N availability than plants with low N concentrations. Global-scale comparisons of other components of the N cycle are still required for better mechanistic understanding of the determinants of variation in foliar d15N and ultimately global patterns in N cycling.
AB - Ratios of nitrogen (N) isotopes in leaves could elucidate underlying patterns of N cycling across ecological gradients. To better understand global-scale patterns of N cycling, we compiled data on foliar N isotope ratios (d15N), foliar N concentrations, mycorrhizal type and climate for over 11 000 plants worldwide. Arbuscular mycorrhizal, ectomycorrhizal, and ericoid mycorrhizal plants were depleted in foliar d15N by 2‰, 3.2‰, 5.9‰, respectively, relative to nonmycorrhizal plants. Foliar d15N increased with decreasing mean annual precipitation and with increasing mean annual temperature (MAT) across sites with MAT = -0.5°C, but was invariant with MAT across sites with MAT < -0.5°C. In independent landscape-level to regional-level studies, foliar d15N increased with increasing N availability; at the global scale, foliar d15N increased with increasing foliar N concentrations and decreasing foliar phosphorus (P) concentrations. Together, these results suggest that warm, dry ecosystems have the highest N availability, while plants with high N concentrations, on average, occupy sites with higher N availability than plants with low N concentrations. Global-scale comparisons of other components of the N cycle are still required for better mechanistic understanding of the determinants of variation in foliar d15N and ultimately global patterns in N cycling.
KW - Faculty of Science
KW - planter
KW - økologi
KW - svampe
KW - mykologi
KW - kvælstof
KW - isotop
KW - plants
KW - ecology
KW - fungi
KW - mycology
KW - nitrogen
KW - isotope
U2 - 10.1111/j.1469-8137.2009.02917.x
DO - 10.1111/j.1469-8137.2009.02917.x
M3 - Journal article
C2 - 19563444
VL - 183
SP - 980
EP - 992
JO - New Phytologist
JF - New Phytologist
SN - 0028-646X
IS - 4
ER -
ID: 12102938