| diversity of the small subunit ribosomal rna gene of the arbuscular mycorrhizal fungi colonizing clintonia borealis from a mixed-wood boreal forest. | arbuscular mycorrhizal fungi (amf) communities in clintonia borealis roots from a boreal mixed forests in northwestern québec were investigated. roots were sampled from 100 m2 plots whose overstory was dominated by either trembling aspen (populus tremuloides michx.), white birch (betula papyrifera marsh.), or mixed white spruce (picea glauca (moench) voss) and balsam fir (abies balsamea (l.) mill.). part of the 18s ribosomal gene of the amf was amplified and the resulting pcr products were clone ... | 2006 | 17064264 |
| white birch (betula papyrifera marshall) foliar litter decomposition in relation to trace metal atmospheric inputs at metal-contaminated and uncontaminated sites near sudbury, ontario and rouyn-noranda, quebec, canada. | decomposition of white birch (betula papyrifera marshall) foliar litter was examined at metal-contaminated and uncontaminated sites established along gradients of soil cu, ni, pb and zn concentrations near sudbury, ontario and rouyn-noranda, quebec. over an 18-month study period, a significantly lower rate of litter mass loss was observed at the sudbury contaminated site (s1) than at the uncontaminated site (s2). this result was not duplicated at corresponding sites (rn1, rn2) in rouyn-noranda, ... | 2004 | 14553996 |