Sofía Cingolani
The invasion of non-native species is one of the leading causes of ecosystem degradation and biodiversity loss worldwide. In the Patagonian region, specifically in Nahuel Huapi National Park, these invasions threaten the integrity of native plant communities, particularly shrublands, which are rich in diversity and ecological functions. Two primary invasive species, Rosa rubiginosa and Cytisus scoparius, have shown to be especially aggressive in their spread within these environments, forming dense vegetation that displaces native species and acts as a source of invasion into nearby areas. These species thrive after disturbances such as fires and overgrazing, exploiting the available resources and altering the community balance.
Mechanical removal of Cytisus scoparius seedlings (Scotch broom) in the Nahuel Huapi National Park. ©Circuito Verde.
This project aims to better understand the factors that confer biotic resistance in native plant communities – that is, the ability to limit or resist invasion. To achieve this, we aim to analyze functional traits of native plants, such as plant height, leaf area, and leaf dry matter content, among others, which may favor resource competition against invasive species. This information will enable the design of restoration practices that promote biotic resistance, helping to prevent new invasions and reducing long-term management efforts.
Fieldwork will be carried out during spring and summer, involving paired plots (invaded and non-invaded) where species composition will be recorded, and key functional traits will be measured. The collected data will be analyzed using advanced statistical models to understand invasion patterns and the effectiveness of biotic resistance in native communities.
In addition to contributing new knowledge on invasion ecology, this study has practical conservation implications. Guides and recommendations will be developed for the management and restoration of invaded shrublands, directly benefiting the National Park and local organizations involved in managing biological invasions. In the long term, the gathered information is expected to serve as a basis for implementing more effective management strategies, minimizing the impact of invasive species and promoting the recovery of native biodiversity in Patagonia.