| Title | Anthropogenic N - a global issue examined at regional scale from soils, to fungi, roots and tree rings |
| Author | Savard, M M; Bégin, C; Laganière, J; Martineau, C; Marion, J; Stefani, F O P; Séguin, A; Smirnoff, A; Bergeron, J; Morency, M -J; Paré, D |
| Source | 16th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference), proceedings; by Chudaev, O (ed.);
Kharaka, Y (ed.); Harmon, R (ed.); Millot, R (ed.); Shouakar-Stash, O (ed.); E3S Web of Conferences vol. 98, 13001, 2019 p. 1-7, https://doi.org/10.1051/e3sconf/20199813001 (Open
Access) |
| Year | 2019 |
| Alt Series | Natural Resources Canada, Contribution Series 20180274 |
| Publisher | EDP Sciences |
| Meeting | 16th International Symposium on Water-Rock Interaction (WRI-16) and 13th International Symposium on Applied Isotope Geochemistry (1st IAGC International Conference); Tomsk; RU; July 21-26, 2019 |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf (Adobe® Reader®) |
| Province | Alberta |
| NTS | 73M/11; 73M/12; 73M/13; 73M/14; 74D/03; 74D/04; 74D/05; 74D/06; 83G/06; 83G/07; 83G/08; 83G/09; 83G/10; 83G/11 |
| Area | Edmonton; Fort McMurray |
| Lat/Long WENS | -115.2500 -114.0000 53.7500 53.2500 |
| Lat/Long WENS | -112.0000 -111.0000 57.5000 56.5000 |
| Subjects | environmental geology; geochemistry; Nature and Environment; Economics and Industry; isotopic studies; nitrogen; dendrochronology; biogeochemistry; mining activities; oil sands; coal; vegetation;
microorganisms; soils; soil samples; pH patterns; biological communities; biomes; Fungi; Bacteria; atmospheric emissions; anthropogenic sources; nitrogen cycle; forests; trees; tree rings; rootlets; coal-fired power plants |
| Illustrations | tables; time series |
| Program | Sources, Environmental
Geoscience |
| Program | Canadian Forest Service, Genomics R&D Initiative and Cumulative Effects Program |
| Released | 2019 06 07 |
| Abstract | Globally increasing anthropogenic airborne emissions of reactive nitrogen (N) generate several environmental issues that require investigating how N accumulation modifies the N cycle. Tree-ring
delta-15N series may help understanding past and current perturbations in the forest N cycle. Although several studies have addressed this issue, most of them were of local scale or based on short delta-15N series. The development of this
environmental indicator however would benefit from examining, at the regional scale, the relationships of long tree-ring series with soil N biogeochemical processes. Here we explore these links for tree stands of the oil-sands region in northern
Alberta, and the coal-fired power plants region in central Alberta, Canada. We characterize the tree-ring delta-15N trends, the N modification rates and bacterial and fungal communities of soil samples collected in the immediate surrounding of the
characterized trees. The dataset suggests that specific soil pH, and N-cycling bacterial and fungal communities influence tree-ring delta-15N responses to anthropogenic emissions, correlating either directly or inversely. Overall, tree-ring delta-15N
series may record changes in the forest-N cycle, but their interpretation requires understanding key soil biogeochemical processes. 'In nature nothing exists alone', Rachel Carson. |
| Summary | (Plain Language Summary, not published)
The globally increasing anthropogenic emissions of reactive nitrogen (N) generate several environmental issues, which require investigating how N
accumulation modifies the N cycle. Tree-ring N isotopic (delta-15N) series may help understanding such past perturbations in the forest N cycle. Developing this environmental indicator entails examining the regional-scale relationships of long
tree-ring series with soil N biogeochemical processes. We have explored these links for trees growing in the Fort McMurray oil-sands region and coal-fired power plants region southwest of Edmonton. We characterized the tree-ring delta-15N trends, and
the N modification rates and bacterial and fungi genomics of soil samples collected in the immediate surrounding of the characterized trees. The data set suggests that specific soil conditions largely control the tree-ring delta-15N responses to
anthropogenic emissions. Hence, tree-ring delta-15N series may record changes in the forest-N cycle, but their interpretation requires understanding key soil biogeochemical processes. |
| GEOSCAN ID | 313037 |
|
|