The identification and spread of the invasive Himalayan wineberry (Rubus ellipticus var. obcordatus) in Albany, Auckland
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Authors
Gwynne, Amy
de Lange, Peter
Starr, L.
Aguilar, Glenn
Campbell, James
Wooton, K.
Owen, Jemma
Fraser, Diane
de Lange, Peter
Starr, L.
Aguilar, Glenn
Campbell, James
Wooton, K.
Owen, Jemma
Fraser, Diane
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2025-07-23
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Conference Contribution - Oral Presentation
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Keyword
Himalayan wineberry (Rubus ellipticus var. obcordatus (Franch.) Focke., Rosaceae)
Albany (Auckland, N.Z.)
Auckland (N.Z.)
New Zealand
invasive species
Albany (Auckland, N.Z.)
Auckland (N.Z.)
New Zealand
invasive species
ANZSRC Field of Research Code (2020)
Citation
Gwynne, A., de Lange, P., Starr, L., Aguilar, G., James, C., Wooton, K., Owen, J., & Fraser, D. (2025, July, 23). The identification and spread of the invasive Himalayan wineberry (Rubus ellipticus var. obcordatus) in Albany, Auckland. [Paper presentation]. New Zealand Biosecurity Institute NETS Conference, NETS2025, Palmerston North, New Zealand
https://hdl.handle.net/10652/7044
Abstract
First recorded in Albany, Auckland, New Zealand in 2019, the highly invasive Himalayan wineberry (Rubus ellipticus var. obcordatus (Franch.) Focke), which has caused significant issues in other invasive regions such as Hawaii, is raising concerns about its potential spread and impact in Aotearoa/New Zealand. Due to the similarity of identification of this species compared with other Rubus species, this study aims to provide clear identification characteristics for the species and survey selected areas in the Albany area to determine the potential growth and spread of this invasive weed. In addition, species geospatial modelling was used to predict the potential invasive range within New Zealand for two contrasting trajectories of global warming (RCP 2.6 and 8.5) by the year 2100. The ground survey was completed on foot using 10 meter-wide spaced transects within bush/scrub areas based on predicted occurrences and presence coordinates recorded in Fieldmaps software. Himalayan wineberry presence data showed a higher number of seedlings compared to adult plants and as expected, were predominantly in disturbed areas near other invasive plant species. The results from this modelling found that the main areas at risk of potential invasion were Auckland, Bay of Plenty, Christchurch and Nelson regions. Due to the potential national spread of Himalayan wineberry and the current limited spread in the Albany area, eradication is thought to be feasible, however, monitoring in other regions, particularly the identified hotspots, is an important action for the future.
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