Revegetation Trials Research Articles

Ecological analysis of disturbed riverbanks in the Montréal area of Québec

In revegetation trials on disturbed riverbank sites in the Montreal region (Quebec, Canada), an analysis of their structure by means of their biotic and abiotic components was undertaken. Vegetation sampling and physical surveys, together with soil analyses of 62 stands, grouped in 20 sectors, were carried out in the summer of 1986. The statistical analyses of biotic and abiotic data were executed in parallel by a hierarchical agglomerative cluster analysis (arithmetic average clustering) and by an ordination in reduced space (principal coordinate analysis). The species colonizing these riverbanks are, for the most part, ruderals from the Montreal region, of which more than 50% are introduced species. The pioneering communities characterizing these artificial habitats have had very little impact on the physical conditions of their environment; therefore, the ordination on the plant communities proves to be strongly correlated to the ordination stemming from the abiotic components. The statistical analysis retains the original sectors, underlining the fact that each human intervention generally results in the creation of a particular ecological situation.

Metabolic quotient of the soil microflora in relation to plant succession.

In this study we propose the hypothesis that ecosystem succession is accompanied by a decrease in the metabolic quotient qCO2 (respiration-to-biomass ratio) of the soil microflora. The qCO2 is calculated from basal respiration (CO2-C·h-1) per unit microbial biomass carbon (Cmier). The hypothesis was tested by studying two primary successions on recessional moraines of the Rotmoos Ferner (Austria) and the Athabasca Glacier (Canada). For both soil seres (0->200 years) it was shown that the qCO2 decreased with time, which corroborated the hypothesis. In addition, the short term development of the qCO2 was demonstrated with a revegetation trial. We observed a rise in qCO2 for the first two years after reclamation, followed by a subsequent decrease.

First year results of revegetation trials using selected native plant species on a simulated pipeline trench, Fort Norman, N.W.T., Canada

First year results of revegetation trials using selected native plant species on a simulated pipeline trench, Fort Norman, N.W.T., Canada

Revegetation Trials on Hard Rock Mining Disturbances

Revegetation Trials on Hard Rock Mining Disturbances

Revegetation Trials on a Saltgrass Meadow

Revegetation Trials on a Saltgrass Meadow

Comparative establishment of species in high country revegetation

Abstract Percentage seed establishment and coyer of 13 grass and legume species were measured in 3 revegetation trials on high country soils. The sites included dry gravels and soils of the dry hygrous zone of high country yellow-brown earths, the bare soils of recently formed farm roads, and brown-grey earth dry steeplands. Cover and establishment were highest for browntop, yarrow, white clover, red clover, alsike clover, cocksfoot, Yorkshire fog, and Chewings fescue.

Fourwing Saltbush Revegetation Trials in Southern Arizona

Fourwing Saltbush Revegetation Trials in Southern Arizona