Details
| Original language | English |
|---|---|
| Pages (from-to) | 608-621 |
| Number of pages | 14 |
| Journal | Isotopes in Environmental and Health Studies |
| Volume | 54 |
| Issue number | 6 |
| Early online date | 29 Aug 2018 |
| Publication status | Published - 2 Nov 2018 |
Abstract
In the last decades a drastic increase in air temperature but a stable precipitation regime in Mongolia has led to gradual drying conditions. Thus, we evaluated the effect of spatial and climatic characteristics on the soil–plant nitrogen dynamics in three representative larch stands (Larix sibirica) with different geographical and climatic conditions using stable nitrogen isotopes. The results showed significant differences in the soil inorganic N content among sites and consequently a different isotopic composition in the plant–soil system. Litter, bark and wood had the lowest δ15N values for all sites, slightly higher δ15N values for needles, while the highest δ15N values were observed for roots and soil. These differences could be the result of the larch stands age themselves, but were in agreement with the spatial and climatic characteristics of the sites. Based on the δ15N value a higher reliance on ectomycorrhizal fungi (ECMF) was observed in the warmest and driest site, while lower dependency was shown in the cooler northern site with higher soil inorganic N content. In both sites, the rate of air temperature increase has been similar in the last decades; however, their soil–plant N dynamics showed different characteristics.
Keywords
- Boreal forest, climatic impact, isotope ecology, larch stands, Mongolia, nitrogen dynamics, nitrogen-15
ASJC Scopus subject areas
- Environmental Science(all)
- Environmental Chemistry
- Environmental Science(all)
- Chemistry(all)
- Inorganic Chemistry
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In: Isotopes in Environmental and Health Studies, Vol. 54, No. 6, 02.11.2018, p. 608-621.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Nitrogen isotope pattern in Mongolian larch stands at the southern Eurasian boreal forest boundary
AU - Hayashi, Mika
AU - Lopez Caceres, Maximo Larry
AU - Nobori, Yoshihiro
AU - Mijidsuren, Byambasuren
AU - Boy, Jens
N1 - Funding information: We want to thank the Mongolian personnel and students from Mongolian University of Life Sciences for all the support during this research and the members of Soil Institute Laboratory at the Leibniz Universität Hannover, who supported us there during the analysis. We also want to thank Dr. G. Hill for the English correction of the paper. We want to thank the Mongolian personnel and students from Mongolian University of Life Sciences for all the support during this research and the members of Soil Institute Laboratory at the Leibniz Universit?t Hannover, who supported us there during the analysis. We also want to thank Dr. G. Hill for the English correction of the paper.
PY - 2018/11/2
Y1 - 2018/11/2
N2 - In the last decades a drastic increase in air temperature but a stable precipitation regime in Mongolia has led to gradual drying conditions. Thus, we evaluated the effect of spatial and climatic characteristics on the soil–plant nitrogen dynamics in three representative larch stands (Larix sibirica) with different geographical and climatic conditions using stable nitrogen isotopes. The results showed significant differences in the soil inorganic N content among sites and consequently a different isotopic composition in the plant–soil system. Litter, bark and wood had the lowest δ15N values for all sites, slightly higher δ15N values for needles, while the highest δ15N values were observed for roots and soil. These differences could be the result of the larch stands age themselves, but were in agreement with the spatial and climatic characteristics of the sites. Based on the δ15N value a higher reliance on ectomycorrhizal fungi (ECMF) was observed in the warmest and driest site, while lower dependency was shown in the cooler northern site with higher soil inorganic N content. In both sites, the rate of air temperature increase has been similar in the last decades; however, their soil–plant N dynamics showed different characteristics.
AB - In the last decades a drastic increase in air temperature but a stable precipitation regime in Mongolia has led to gradual drying conditions. Thus, we evaluated the effect of spatial and climatic characteristics on the soil–plant nitrogen dynamics in three representative larch stands (Larix sibirica) with different geographical and climatic conditions using stable nitrogen isotopes. The results showed significant differences in the soil inorganic N content among sites and consequently a different isotopic composition in the plant–soil system. Litter, bark and wood had the lowest δ15N values for all sites, slightly higher δ15N values for needles, while the highest δ15N values were observed for roots and soil. These differences could be the result of the larch stands age themselves, but were in agreement with the spatial and climatic characteristics of the sites. Based on the δ15N value a higher reliance on ectomycorrhizal fungi (ECMF) was observed in the warmest and driest site, while lower dependency was shown in the cooler northern site with higher soil inorganic N content. In both sites, the rate of air temperature increase has been similar in the last decades; however, their soil–plant N dynamics showed different characteristics.
KW - Boreal forest
KW - climatic impact
KW - isotope ecology
KW - larch stands
KW - Mongolia
KW - nitrogen dynamics
KW - nitrogen-15
UR - http://www.scopus.com/inward/record.url?scp=85053275541&partnerID=8YFLogxK
U2 - 10.1080/10256016.2018.1509073
DO - 10.1080/10256016.2018.1509073
M3 - Article
C2 - 30156882
AN - SCOPUS:85053275541
VL - 54
SP - 608
EP - 621
JO - Isotopes in Environmental and Health Studies
JF - Isotopes in Environmental and Health Studies
SN - 1025-6016
IS - 6
ER -