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- Aznar, Jean-Christophe; Desrochers, Andréé
- Écoscience 2008 v.15 no.2 pp. 250-257
- Castor canadensis; birds; graminoids; lakes; ponds; riparian areas; rivers; shrubs; surveys; temporal variation; vegetation
- ... We examined beaver (Castor canadensis) pond dynamics and associated riparian bird communities, based on call-response surveys. Following water disappearance, abandoned beaver ponds were invaded by grassy areas and alder shrubs and supported higher bird species numbers than nearby riparian areas. We detected a total of 49 species. At abandoned beaver ponds, the mean number of species was 6.4, where ...
- Rhoades, Charles; Binkley, Dan; Oskarsson, Hlynur; Stottlemyer, Robert
- Écoscience 2008 v.15 no.2 pp. 223-230
- Picea glauca; Populus balsamifera; Salix; Shepherdia; chronosequences; floodplains; mineral soils; mixed forests; nitrogen; nitrogen fixation; primary succession; rivers; sediment deposition; shrubs; silt; terrace soils; terraces; terrestrial ecosystems; Alaska
- ... Nitrogen enters terrestrial ecosystems through multiple pathways during primary succession. We measured accumulation of total soil nitrogen and changes in inorganic nitrogen (N) pools across a 300-y sequence of river terraces in northwest Alaska and assessed the contribution of the nitrogen-fixing shrub Shepherdia canadensis. Our work compared 5 stages of floodplain succession, progressing from a ...