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| Titel |
Soil sustainability study in Lithuanian alien forest stands |
| VerfasserIn |
Dovile Čiuldiene, Gražina Skridlaitė, Gaile Žalūdiene, Cecilia Askelsson, Kestutis Armolaitis |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250123125
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| Publikation (Nr.) |
 EGU/EGU2016-2325.pdf |
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| Zusammenfassung |
| Tree species are shifting their natural ranges in response to climate changes (Saltré et al.,
2013). Northern red oak has originated from North America, but was planted in
Europe already in twentieth century. At present, it is considered as invasive species in
Poland and at invasive stage in the Lithuanian forests (Riepsas and Straigyte, 2008).
European larch naturally grows in Central Europe, but its range has been extended
by planting it as far as the Nordic countries. According to a pollen study in peat
soils, European larch naturally grew in Lithuania in the sixteenth century and was
reintroduced 200 years ago (Jankauskas, 1954). Therefore, the global warming could
accelerate the expansion of European larch and Northern red oak into Lithuanian
forests. An urgent need appeared to evaluate an impact of those warmth-tolerant
species on soil mineral chemistry and quality. New results on the determination of
mineral weathering rates in alien forest stands using a PROFILE soil chemistry model
were obtained during a doctoral study at the Institute of Forestry. Soil minerals
were studied by a Scanning Electron Microscopy at the Institute of Geology and
Geography. The results provided a lot of new information on soil weathering rates in
Lithuania.
The 47 and 157-year-old European larch (Larix decidua Mill.), 45 and 55-year-old
Northern red oak (Quercus rubra L.) plantations and adjacent perennial grasslands were
chosen for this study. The soils were classified as Luvisols and were developed from
glaciofluvial deposits. The PROFILE model requires data of climate conditions (mean annual
temperature and precipitation), chemical parameters of atmospheric deposition, forest
plantation dendrometric and chemical (wood, foliage litter fall) characteristics, soil physical
characteristics and mineral composition.
A cation weathering rate (sum of Ca+Mg+ K) is 30% higher in a soil under the
Northern red oak than in adjacent perennial grassland. Meanwhile, cation weathering
rates in the differently-aged European larch plantations do not differ much. The
obtained results suggest that the low calculated rates of cation release (13.1±0.4 mmol
m−3yr−1) in grasslands and the stable rates (62.3±7.4mmol m−3yr−1) observed in the
differently-aged larch plantations could sustain the quality of soil. The higher mineral
weathering rate in the red oak forest ecosystem could be related with a faster nutrient
cycling.
Jankauskas, M. 1954. Vilnius, 258 (in Lithuanian).
Riepsas, E., Straigyte, L. 2008. Baltic forestry, 14(2): 122-130.
Saltre, F., Saint-Amant, R., Gritti, E. S., Brewer, S., Gaucherel, C., Davis, B. A. S.,
Chuine, I., 2013. Global Ecology and Biogeography, 22:1217-1227. |
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