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Density and age of invasive "Robinia pseudoacacia" modulate its impact on floodplain forests

Title data

Staska, Bernadette ; Essl, Franz ; Samimi, Cyrus:
Density and age of invasive "Robinia pseudoacacia" modulate its impact on floodplain forests.
In: Basic and Applied Ecology. Vol. 15 (September 2014) Issue 6 . - pp. 551-558.
ISSN 1439-1791
DOI: https://doi.org/10.1016/j.baae.2014.07.010

Official URL: Volltext

Abstract in another language

The invasion of black locust (Robinia pseudoacacia L.) into nutrient-poor and dry habitats strongly alters resident species composition, species diversity and nutrient availability. However, less is known if its occurrence in more nutrient-rich habitats and dense forests causes similar effects, and if so, how the gradient of stand density and tree age affect soil properties and vegetation composition.We chose riparian forests of the Donau-Auen National Park in Eastern Austria and selected 28 plots which differed in R. pseudoacacia stand density and tree age. Vegetation composition, physical and chemical soil parameters were analyzed. Data analysis was performed using descriptive and bivariate statistics.We found that the content of soil nitrogen, NO3 and carbon increased with black locust density and stand age, respectively, while total C/N ratio appeared to be less affected. While plant diversity (Simpson index) did not show a significant variation neither among Robinia age classes nor along density gradients, some nitrophilous species gained abundance with increased density and some other species with increased age of R. pseudoacacia stands. Only one species (Anemone ranunculoides) became less abundant with Robinia stem density. We argue that these changes in species abundance are primarily due to altered mineral nitrogen availability, but increased radiation intensity under the open canopy of R. pseudoacacia and allelopathic qualities of the tree might also play a role. However, we found evidence that these effects imply certain thresholds and are not linearly scaled.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Europe; Austria; National Park; Invasive species; Robinia pseudoacacia; Soil; Ecological monitoring
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Climatology > Professorship Climatology - Univ.-Prof. Dr. Cyrus Samimi
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Climatology
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
Date Deposited: 02 Dec 2014 13:19
Last Modified: 02 Dec 2014 13:19
URI: https://eref.uni-bayreuth.de/id/eprint/4414