{"id":108288,"date":"2022-08-03T15:17:12","date_gmt":"2022-08-03T13:17:12","guid":{"rendered":"https:\/\/bfw.gv.at\/?post_type=pressemeldungen&p=108288"},"modified":"2022-08-03T15:20:39","modified_gmt":"2022-08-03T13:20:39","slug":"correctly-assessing-non-native-tree-species-in-the-alpine-region","status":"publish","type":"pressemeldungen","link":"https:\/\/www.bfw.gv.at\/en\/pressemeldungen\/correctly-assessing-non-native-tree-species-in-the-alpine-region\/","title":{"rendered":"Correctly assessing non-native tree species in the Alpine region"},"content":{"rendered":"\n

Robinia, Douglas fir and red oak were introduced to Europe several hundred years ago and are among the 530 tree species that are non-native to Europe. Most of these non-native tree species grow in cities and have also been promoted in the forest: Some produce higher yields, have more stable root systems, or are a special aesthetic feature. However, they also threaten native biodiversity and associated ecosystem services to some extent. The international ALPTREES project has developed a risk assessment system for this purpose and published manuals on the management of non-native tree species in forests and urban areas.<\/p>\n\n\n\n

Compared to urban areas, where non-native trees predominate, the number of non-native trees in forests in the Alpine region is relatively small. According to estimates, European forests consist on average of about 4% non-native trees. Of these, in turn, only about 5% (i.e. a total of 0.2%) are invasive, which means that if they become established and spread, they pose a risk to native biodiversity.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Risk assessment depending on location<\/h3>\n\n\n\n

Given the impact of climate change on forests and urban areas, non-native tree species will become more important because they may be better adapted to future climatic conditions.<\/p>\n\n\n\n

“In such critical and sensitive ecosystems as the Alpine region, potential risks and benefits need to be weighed particularly thoroughly before decisions are made.”<\/p>Katharina Lapin, Austrian Research Center for Forests (BFW)<\/cite><\/blockquote>\n\n\n\n

After all, climate change is also altering the characteristics of already established non-native tree species to the extent that some of them have only become more competitive and invasive under the new altered climate conditions, especially where native tree species can no longer thrive optimally in their natural forest habitats due to climate change.<\/p>\n\n\n\n

Step-by-step guide<\/h3>\n\n\n\n

The ALPTREES team, consisting of project leader BFW and eleven partners, has therefore developed a method for site-specific risk assessment. Stakeholders from forestry, nature conservation, and spatial and urban planning can use a step-by-step guide to distinguish between negative and positive impacts of non-native tree species on ecosystem services. The guide serves as a decision-making tool for selecting sites, non-native tree species, and silvicultural measures to limit associated risks. In general, integration of non-native tree species into mixed forest stands with native species is easiest when the ecological characteristics of the introduced non-native tree species are similar to native species and the non-native tree species do not exhibit strong dominance behavior.<\/p>\n\n\n\n

Example red oak<\/h3>\n\n\n\n

Red oak is a different case: Although it is considered one of the promising “alternative” tree species, its invasive potential should be noted. It tolerates summer heat much better than most native tree species and is also highly drought resistant. In native oak and oak-hornbeam forests, red oak tends to suppress the natural regeneration of native tree species. Therefore, it should only be introduced in mixed stands; monocultures should be avoided.<\/p>\n\n\n\n

Extensive information portal of ALPTREES<\/h3>\n\n\n\n

The ALPTREES project (code ASP791) was co-funded by the European Commission under the INTERREG Alpine Space funding program. Furthermore, identification and management manuals, which are available for download, as well as an online course on non-native tree species, have been produced.<\/p>\n\n\n\n

Link tips<\/h4>\n\n\n\n

“Management of non-native tree species in forests of the Alpine space” <\/a><\/p>\n\n\n\n

“Handbook for non native tree species in the Urban Space”<\/a><\/p>\n\n\n\n

“Identification Handbook for non native tree species in the Alpine Space”<\/a><\/p>\n\n\n\n

ALPTREES Open Knowledge Hub and online course<\/a><\/p>\n\n\n\n

Project “Climate change adaptation in forest management: opportunities and risks of non-native tree species”<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Robinia, Douglas fir and red oak were introduced to Europe several hundred years ago and are among the 530 tree species that are non-native to Europe. The international ALPTREES project has developed a risk assessment system for this purpose and published manuals on the management of non-native tree species in forests and urban areas.<\/p>\n","protected":false},"featured_media":108279,"template":"","meta":{"_acf_changed":false},"press_tags":[13323,15319,13295,13293,4575,15311],"institutes":[4428],"bezug":[14955],"authors":[3464],"departments":[],"publicationtype":[],"class_list":["post-108288","pressemeldungen","type-pressemeldungen","status-publish","has-post-thumbnail","hentry","press_tags-alpine-region","press_tags-alptrees-2","press_tags-climate-change","press_tags-interreg-2","press_tags-non-native-tree-species","press_tags-risk-assessment","institutes-forest-biodiversity-nature-conservation","bezug-international-projects","authors-lackner-christian"],"acf":[],"yoast_head":"\nCorrectly assessing non-native tree species in the Alpine region - BFW<\/title>\n<meta name=\"description\" content=\"Robinia, Douglas fir and red oak were introduced to Europe several hundred years ago and are among the 530 tree species that are non-native to Europe. 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