Sustainable use and management of non native trees in the alpine region

Main Project Outputs

Online Training Course

In this online course, dedicated experts from the ALPTREES project take you on an exciting journey of discovery into the world of trees in urban, peri-urban, and forest ecosystems. Our motivation is to discuss the controversial effects of negative and positive impacts of non-native trees and to provide science-based technical guidance for the management and responsible use of non-native trees in the Alpine Space. Each citizen of the Alpine Space has a chance to learn more about the diversity of native and non-native trees species!

Handbooks for the Use and Management of non native trees species in the Alpine Space

In the pocket guide “Identification Handbooks for non native trees in the Alpine Space” we describe 49 non-native tree species, that occur in forests, peri-urban and urban areas in the Alpine Space.
In ten chapters the “Handbook for Management of non-native tree species IN FORESTS of the Alpine space”

provides results and scientific approaches of our partners about the situation of non native tree species in Alpine Forest areas.
Urbanized areas act as heat islands that experience higher temperatures than their surroundings. Man-made structures, including buildings and roads absorb and re-emit the sun’s heat more than natural landscapes such as forests and bodies of water. “The Handbook for Management of non-native tree species IN URBAN AREA of the Alpine space” provides knowledge about the use and management of tree species in the urban space.

Manual for risk assessment

Non-native tree species (NNT) are used in forestry across the Alpine Space for their growth performance, valuable timber, and resistance to drought and pest or pathogen damage. Yet, cultivating NNT may pose risks to biodiversity and associated ecosystem services, and several NNT are evaluated as invasive in some regions in the Alpine Space. Such conclusions typically follow the results of a risk assessment, which do not adequately consider site-specific variations in impacts and the extent of the affected area. Here, we present a new methodological framework to mitigate risks associated with NNT while taking advantage of the ecosystem services that certain tree species can provide. The framework is based on a stratified assessment of risks posed by NNT that distinguishes between different ecosystem types or sites and considers the effectiveness of available management strategies to mitigate negative effects.

Open knowlewdge HUB for non native trees in species in the Alpine Space

The Database on Non-Native Tree Species was developed as a concept and prototype by the ALPTREES project in 2022 as part of a project undertaken for the Sustainable use and management of non-native trees in the alpine region. The concept is constantly revisited and expanded by the editorial team of the NNT HUB.

Interactive Web GIS application

The Web GIS tool has been implemented as a Google Earth Engine App (see: to share policies, tools, and technical guidance for the management and responsible use of NNT. This inter-active tool will allow stakeholders from different sectors to distinguish between positive and negative impacts of NNT and to see the predicted impact of Climate Change in any location of the Alpine Space. The Web GIS tool will be open to and used by citizens, NGOs, public authorities, education bodies, and businesses or even investors. For this Web GIS tool on Google Earth Engine, all 168 tree species suitability maps/risk maps have been incorporated. Four additional information layers/set of maps have been added in order to improve the information provided to the App user and to support respective decision making.


User Guide for Web GIS (data repository)


Transnational strategy

The overall objective of the transnational strategy is to improve knowledge-based decision-making and communication on the responsible use and management of non-native trees in the Alpine Space.