How does Himalayan Blackberry (Rubus armeniacus) impact breeding bird diversity? : a case study of the Lower Mainland of British Columbia

Loading...
Thumbnail Image
Issue Date
2010-06-25T16:24:33Z
Authors
Astley, Caroline
License
Subject
ecology
environmental sciences
biology
invasive plants
breeding birds
lower mainland BC
Abstract
Awareness of the spread of invasive plant species has grown, but quantitative measures of their impacts are lacking. This study analyses the impact of Himalayan blackberry (Rubus armeniacus) on breeding bird diversity finding a significant difference in bird diversity between “natural” and R. armeniacus-dominated understoreys. More bird species were noted in habitats with greater structural and compositional diversity. Simpson’s richness/evenness index was significantly different between habitat types for Stanley Park and Maplewood Flats (P<0.05) but not Jericho Park (P>0.05), likely due to lower overall bird diversity at Jericho Park and lack of overstorey trees at R. armeniacus thickets. When R. armeniacus is the dominant understorey shrub in a forested setting it has the greatest negative impact on breeding bird diversity.
Description
Harmful Language Statement