<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Replacing native forests by alien tree plantations can lead to changes in the species composition of the understory. However, differences in the understory species spectrum can also be a part of the natural variability of forest stands. We have tested the suitability of the twin plots method for an evaluation of the impact of alien trees on the species composition of the understory. This research was conducted on an alluvial plain (SW Slovakia) that was originally covered by a hardwood floodplain forest. The study was based on 7 twin plots of black locust (<italic>Robinia pseudoacacia</italic>) and native forest plots, with a maximum distance of 100 meters between the members of the twins. The dissimilarity of the plots within the black locust forest was significantly lower than the dissimilarity between the twin plots. In addition, the dissimilarity of the plots within the hardwood floodplain forest was also significantly lower than the dissimilarity between the twin plots. Under the same environmental conditions, the higher dissimilarity of the twin plots was caused by major edificators and their impact on the understory vegetation. The twin plots method proved to be a suitable tool for analyses of the impact of alien trees on understory vegetation.</p></abstract>

Replacing native forests by alien tree plantations can lead to changes in the species composition of the understory. However, differences in the understory species spectrum can also be a part of the natural variability of forest stands. We have tested the suitability of the twin plots method for an evaluation of the impact of alien trees on the species composition of the understory. This research was conducted on an alluvial plain (SW Slovakia) that was originally covered by a hardwood floodplain forest. The study was based on 7 twin plots of black locust (Robinia pseudoacacia) and native forest plots, with a maximum distance of 100 meters between the members of the twins. The dissimilarity of the plots within the black locust forest was significantly lower than the dissimilarity between the twin plots. In addition, the dissimilarity of the plots within the hardwood floodplain forest was also significantly lower than the dissimilarity between the twin plots. Under the same environmental conditions, the higher dissimilarity of the twin plots was caused by major edificators and their impact on the understory vegetation. The twin plots method proved to be a suitable tool for analyses of the impact of alien trees on understory vegetation.

Twin plots – appropriate method to assess the impact of alien tree on understory?

Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences

Hacquetia

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Replacing native forests by alien tree plantations can lead to changes in the species composition of the understory. However, differences in the understory...

Twin plots – appropriate method to assess the impact of alien tree on understory?

Publié en ligne: 28 juil. 2018

Pages: 163 - 169

Reçu: 25 mai 2017

Accepté: 27 oct. 2017

DOI: https://doi.org/10.1515/hacq-2017-0012

Mots clés
black locust plantation, changes of the species composition, paired relevés, dissimilarity, variability

© 2018 Denisa Bazalová et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Twin plots – appropriate method to assess the impact of alien tree on understory?

Publié en ligne: 28 juil. 2018

Pages: 163 - 169

Reçu: 25 mai 2017

Accepté: 27 oct. 2017

DOI: https://doi.org/10.1515/hacq-2017-0012

Mots clésblack locust plantation, changes of the species composition, paired relevés, dissimilarity, variability

© 2018 Denisa Bazalová et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
black locust plantation, changes of the species composition, paired relevés, dissimilarity, variability