Succession on subalpine placer mine spoil: Effects of revegetation with Alnus viridis, Alaska, U.S.A.
Alnus viridis seedlings were planted on placer mine spoil in an Alaskan subalpine watershed to bypass a seedling establishment bottleneck for A. viridis, and to evaluate the interaction between A. viridis and the dominant riparian woody plants, Salix alaxensis and Populus balsamifera. The study area was divided into 11 replicate blocks, each on a homogeneous recontoured spoil pile. Blocks were divided into two 0.01 ha plots, and treatments without (control) and with 84 planted A. viridis seedlings were randomly assigned to plots. After 10 years, the Alnus treatment had a dense stand of A. viridis 1–2 m tall, while the control had fewer, smaller seedlings. Compared to the control, planted A. viridis had a neutral effect on S. alaxensis and inhibited P. balsamifera at the seedling establishment stage, but facilitated the growth of established plants of both species, with many plants overtopping the A. viridis canopy. Compared to the control, S. alaxensis plants in the Alnus treatment had higher levels of foliar N and δ15N values closer to those of A. viridis, indicating the importance of N fixation by A. viridis. Planting A. viridis accelerated the rate of succession by stimulating growth of woody dominants.
Additional publication details
|Publication Subtype||Journal Article|
|Title||Succession on subalpine placer mine spoil: Effects of revegetation with Alnus viridis, Alaska, U.S.A.|
|Series title||Arctic, Antarctic, and Alpine Research|
|Publisher||Institute of Arctic and Alpine Research|
|Publisher location||Boulder, CO|
|Contributing office(s)||Alaska Science Center|
|Other Geospatial||Denali National Park and Preserve, Glen creek watershed|
|Online Only (Y/N)||N|
|Additional Online Files (Y/N)||N|
|Google Analytic Metrics||Metrics page|