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| Titel |
Comparing soil biogeochemical processes in novel and natural boreal forest ecosystems |
| VerfasserIn |
S. A. Quideau, M. J. B. Swallow, C. E. Prescott, S. J. Grayston, S.-W. Oh |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 8 ; Nr. 10, no. 8 (2013-08-27), S.5651-5661 |
| Datensatznummer |
250085309
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| Publikation (Nr.) |
 copernicus.org/bg-10-5651-2013.pdf |
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| Zusammenfassung |
| Emulating the variability that exists in the natural landscape prior to
disturbance should be a goal of soil reconstruction and land reclamation
efforts following resource extraction. Long-term ecosystem sustainability
within reclaimed landscapes can only be achieved with the re-establishment of
biogeochemical processes between reconstructed soils and plants. In this
study, we assessed key soil biogeochemical attributes (nutrient availability,
organic matter composition, and microbial communities) in reconstructed,
novel, anthropogenic ecosystems, covering different reclamation treatments
following open-cast mining for oil extraction. We compared the attributes to
those present in a range of natural soils representative of mature boreal
forest ecosystems in the same area of Northern Alberta. Soil nutrient
availability was determined in situ with resin probes, organic matter
composition was described with 13C nuclear magnetic resonance
spectroscopy and soil microbial community structure was characterized using
phospholipid fatty acid analysis. Significant differences among natural
ecosystems were apparent in nutrient availability and seemed more related to
the dominant tree cover than to soil type. When analyzed together, all
natural forests differed significantly from the novel ecosystems, in
particular with respect to soil organic matter composition. However, there
was some overlap between the reconstructed soils and some of the natural
ecosystems in nutrient availability and microbial communities, but not in
organic matter characteristics. Hence, our results illustrate the importance
of considering the range of natural landscape variability and including
several soil biogeochemical attributes when comparing novel, anthropogenic
ecosystems to the mature ecosystems that constitute ecological targets. |
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