Rapid upwards spread of non-native plants in mountains across continents

Iseli, Evelin and Chisholm, Chelsea and Lenoir, Jonathan and Haider, Sylvia and Seipel, Tim and Barros, Agustina and Hargreaves, Anna L. and Kardol, Paul and Lembrechts, Jonas J. and McDougall, Keith and Rashid, Irfan and Rumpf, Sabine B. and Arévalo, José Ramón and Cavieres, Lohengrin and Daehler, Curtis and Dar, Pervaiz A. and Endress, Bryan and Jakobs, Gabi and Jiménez, Alejandra and Küffer, Christoph and Mihoc, Maritza and Milbau, Ann and Morgan, John W. and Naylor, Bridgett J. and Pauchard, Aníbal and Ratier Backes, Amanda and Reshi, Zafar A. and Rew, Lisa J. and Righetti, Damiano and Shannon, James M. and Valencia, Graciela and Walsh, Neville and Wright, Genevieve T. and Alexander, Jake M.. (2023) Rapid upwards spread of non-native plants in mountains across continents. Nature ecology & evolution, 7 (3). pp. 405-413.

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Official URL: https://edoc.unibas.ch/94952/

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High-elevation ecosystems are among the few ecosystems worldwide that are not yet heavily invaded by non-native plants. This is expected to change as species expand their range limits upwards to fill their climatic niches and respond to ongoing anthropogenic disturbances. Yet, whether and how quickly these changes are happening has only been assessed in a few isolated cases. Starting in 2007, we conducted repeated surveys of non-native plant distributions along mountain roads in 11 regions from 5 continents. We show that over a 5- to 10-year period, the number of non-native species increased on average by approximately 16% per decade across regions. The direction and magnitude of upper range limit shifts depended on elevation across all regions. Supported by a null-model approach accounting for range changes expected by chance alone, we found greater than expected upward shifts at lower/mid elevations in at least seven regions. After accounting for elevation dependence, significant average upward shifts were detected in a further three regions (revealing evidence for upward shifts in 10 of 11 regions). Together, our results show that mountain environments are becoming increasingly exposed to biological invasions, emphasizing the need to monitor and prevent potential biosecurity issues emerging in high-elevation ecosystems.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Ökologie (Rumpf)
UniBasel Contributors:Rumpf, Sabine
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Nature Publishing Group
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Jun 2023 07:23
Deposited On:22 Jun 2023 07:23

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