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| Titel |
Effects of tree diversity and environmental factors on the soil microbial community in three soil depth in a Central European beech forest |
| VerfasserIn |
C. Fornacon, M. Jacob, A. Guckland, C. Meinen, G. Gleixner |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250025734
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| Zusammenfassung |
| We investigated the link between aboveground and belowground diversity in forest
ecosystems. Therefore, we determined the effect of tree composition on amount and
composition of the soil microbial community using phospholipid fatty acid profiles in the
Hainich National Park in Thuringia, a deciduous mixed forest on loess over limestone in
Central Germany. On the one hand we investigated the composition of the microbial
community in dependence of leave litter composition, hypothesizing that distinct leave litter
compositions activated signature PLFA‘s. On the other hand we determined if environmental
factor like clay content or nutrient status influence the microbial community in
deeper soil horizons. Consequently soil was sampled from depth intervals of 0-5
cm, 5-10 cm and 10-20 cm. Plots with highest diversity of leave litter had highest
total amounts of fatty acids in the upper 5 cm. Mainly PLFA 16:1Ï5 was activated
in autumn, being a common marker for mycorrhizal fungi. In soil depth below
5 cm the environmental factors like clay and soil nutrients like phosphorus and
carbon, explained most of the soil microbial variability. On pure beech sites the total
phosphorus content of soil influenced soil microbial diversity, but on sites with higher tree
diversity no single factor varying the microbial community could be identified. Tree
diversity and environmental factors together effect soil microbial community and
are closely related to the link between aboveground and belowground diversity. |
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