Are boreal ecosystems susceptible to alien plant invasion? Evidence from protected areas
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Authors: M. Rose, and L. Hermanutz
Date: 2004
Journal: Oecologia
Volume: 139
Number: 3
Pages: 467-477
Summary of Methods: A two year study was conducted in Newfoundland on the Gros Morne National Park, a boreal ecosystem, to determine the level of susceptibility to invasion and if any kind of disturbance would cause weed invasion within this large protected area. Plots were located throughout the park with vegetation measurements (% cover by species, bare ground, light availability, and litter cover) and classification of disturbance (human and animal) as high, medium, low or undisturbed taken at each site. Soil characteristics such as pH, and soil substrate were also taken.
Article Summary / Main Points: The majority of alien plant species were found in areas of high human activity. Natural disturbances created niches that allow for invasion from alien (non-native) vegetation. High soil pH was associated with alien species but disturbances did not change soil pH, thus the properties of the substrate determined the susceptibility of a site to invasion. Moose, a non-native herbivore, is the primary means of weed dispersal to remote areas of the park.
Vegetation Types: Not Applicable
MLRA Ecoregions: Not Applicable
Agrovoc Control Words: Weeds Rangelands Wildlife
Article Review Type: Refereed
Article Type: Experimental Research
Keywords: disturbance, soil ph, herbivory, forests, boreal ecosystem, natural areas, human activity, weed spread
Annotation: Although this study was conducted in Canada, the findings here are thought provoking. Application of these findings should be done with caution and ideally after additional research in specific vegetation type.
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