Biomarkers of novel ecosystem development in boreal forest soils |
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| Institution: | 1. Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton, AB T6G 2E3, Canada;2. Department of Sustainable Soils and Grassland Systems, Rothamsted Research–North Wyke, Okehampton, Devon EX20 2SB, UK;1. Institute of Geography, University of Osnabrück, Seminarstraße 19ab, 49074 Osnabrück, Germany;2. IFAB Institut für Angewandte Bodenbiologie GmbH, Tornberg 24a, 22337 Hamburg, Germany;3. Functional Ecology Laboratory, University of Neuchâtel, Rue Emile-Argand 11, 2000 Neuchâtel, Switzerland;4. Division Agronomie, Haute école des Sciences Agronomiques, Forestières et Alimentaires HAFL, Länggasse 85, 3052 Zollikofen, Switzerland;5. Museo Tridentino di Scienze Naturali, Corso del Lavoro e della Scienza 3, 38122 Trento, Italy;1. Chair of Green Energy Research, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, P. O. Box 2460, Riyadh 11451, Saudi Arabia;2. College of Earth, Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA;3. Department of Earth and Environmental Sciences, Sana''a University, Sana''a, Yemen;4. Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, P. O. Box 2460, Riyadh 11451, Saudi Arabia;5. Department of Chemistry, Oregon State University, Corvallis, OR 97331, USA;1. Department of Renewable Resources, 442 Earth Sciences Building, University of Alberta, Edmonton, AB, Canada T6G 2E3;2. Soil Protection and Recultivation, Brandenburg University of Technology, Cottbus-Senftenberg, P. O. Box 101344, 03013 Cottbus, Germany;1. Centre for Ecology & Hydrology, Benson Lane, Crowmarsh Gifford, Wallingford OX10 8BB, UK;2. INRA, UMR 1136 Interactions Arbres Micro-organismes, Centre INRA de Nancy, 54280 Champenoux, France;3. INRA, UMR 1347 Agroécologie, 17 rue Sully, BP 86510, 21034 Dijon cedex, France;4. INRA, UMR 1347 Agroécologie, GenoSol Platform, 17 rue Sully, BP 86510, 21034 Dijon cedex, France;5. Netherlands Institute of Ecology, Department of Microbial Ecology, Wageningen, The Netherlands |
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| Abstract: | Novel ecosystem development is occurring within the western boreal forest of Canada due to land reclamation following oil sand surface mining. Sphagnum peat is the primary organic amendment used to reconstruct soil in these novel ecosystems. We hypothesised that ecosystem recovery would be indicated by an increasing similarity in the biomolecular characteristics of novel soil organic matter (SOM) derived from peat to those of natural boreal ecosystems. We evaluated the use of the homologous series of long chain (? C21) n-alkanes with odd/even predominance to monitor the re-establishment of boreal forest on these anthropogenic soils. The lipids were extracted from dominant vegetation inputs and SOM from a series of natural and novel ecosystem reference plots. Twice the concentration of n-alkanes was extracted from natural than from novel ecosystem SOM (p < 0.01). We observed unique n-alkane signatures for the source vegetation, e.g. peat material was dominated by C31, and aspen (Populus tremuloides Michx.) leaves by C25. The n-alkane distribution differed between the two systems (p < 0.001) and reflected the dominant vegetation input, i.e. peat or tree species. Our results indicate that further research is required to clarify the influence of vegetation or disturbance on the signature of n-alkanes in SOM; however, the use of n-alkanes as biomarkers of novel ecosystem development is a promising application. |
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