Ash-leaf maple (Acer negundo L.) in coastal phytocenoses of the Vorona River

Dubrovin

Pustovalova

2021

Preprint

We assessed the link between canopy cover degree and ground vegetation diversity under alien ash-leaved maple (Acer negundo) and other (native or alien) tree species. We investigated urban and suburban forests in the large city of Yekaterinburg, Russia. Forests were evaluated on two spatial scales. Through an inter-habitat comparison we recorded canopy cover and plant diversity among 13 sample plots of 20 × 20 m where A. negundo dominated and 13 plots where other tree species dominated. In an intra-habitat comparison, we recorded canopy cover and ground vegetation diversity among 800 sample plots measuring 1 m2 in the extended urbanised forest, which featured abundant alien (308 plots) and native trees (492 plots). We observed decreased diversity among vascular ground plant species by 40% (inter-habitat) and 20% (intra-habitat) in areas dominated by A. negundo compared to areas dominated by native tree and shrub species. An abundance of A. negundo was accompanied by increased canopy cover. We found a negative relationship between canopy cover and the number of understory herbaceous species. Thus, the interception of light and the restriction of its amount for other species is a main factor supporting the negative influence of A. negundo on native plant communities.

Section: Discussioncontrasting

confidence: 97%

High Canopy Cover of Invasive Acer Negundo L. Affects Ground Vegetation Diversity

Dubrovin

Pustovalova

2021

Preprint

“…Although in 2016 we investigated the activity of A. negundo and in 2017 -H. sosnowskyi, this can hardly explain the features of different year's results. It is important that the experiments of 2016 and 2017 were conducted in different conditions -in the We concluded that the soils under A. negundo and H. sosnowskyi canopies does not inhibit F. rubra and T. repens germination, it is weakly corresponded to the other effects that observed in A. negundo and H. sosnowskyi invasions, such as reducing indigenous plants diversity [21]. Note that the reduced abundance of native plants in the thickets of A. negundo is confirmed in our areas: there were about 2-8 species of native plants in A. negundo habitats and about 10-15 species in habitats where A. negundo was absent.…”

Section: Resultsmentioning

confidence: 95%

Seed germination of native plants in soil transformed by invasive plantsAcer negundoandHeracleum sosnowskyi

Rafikova

Kiseleva²,

2020

E3S Web Conf.

We tested the hypothesis of the effect of soils transformed by invasive plants (Acer negundo L. and Heracleum sosnowskyi Manden.) on native plants germination. We conducted vegetation experiments in germination of Festuca rubra L. and Trifolium repens L. in upper layer of urban soil collected in invasive plants thickets and in nearby areas without invasive plants in 2016–2017. We also used the sod-podzolic soil from old suburban meadow as a control. Differences in seed germination on soils transformed by invasive plants and non-transformed soils were insignificant. We could not confirm the effect of soils collected from Acer negundo and Heracleum sosnowskyi thickets on plants germination by GLM analysis.

“…A . negundo actively restores itself in the urbanised forests of the Middle Urals 5 , 6 , but the invasion of ash-leaved maple is dangerous for some types of plant communities 7 , 8 . In communities dominated by A .…”

Section: Introductionmentioning

confidence: 99%

“…In communities dominated by A . negundo , the diversity of native plants decreases 7 , 9 , 10 . Invasion of the European Acer platanoides L. 11 and the Far Eastern Acer ginnala Maxim produce a similarly negative effect on the diversity of native plant communities in North America 12 .…”

Section: Introductionmentioning

confidence: 99%

High canopy cover of invasive Acer negundo L. affects ground vegetation taxonomic richness

Dubrovin

Pustovalova

2021

Sci Rep

We assessed the link between canopy cover degree and ground vegetation taxonomic richness under alien ash-leaved maple (Acer negundo) and other (native or alien) tree species. We investigated urban and suburban forests in the large city of Yekaterinburg, Russia. Forests were evaluated on two spatial scales. Through an inter-habitat comparison we recorded canopy cover and plant taxonomic richness among 13 sample plots of 20 × 20 m where A. negundo dominated and 13 plots where other tree species dominated. In an intra-habitat comparison, we recorded canopy cover and ground vegetation taxonomic richness among 800 sample plots measuring 1 m2 in the extended urbanised forest, which featured abundant alien (308 plots) and native trees (492 plots). We observed decreased taxonomic richness among vascular ground plant species by 40% (inter-habitat) and 20% (intra-habitat) in areas dominated by A. negundo compared to areas dominated by native tree and shrub species. An abundance of A. negundo was accompanied by increased canopy cover. We found a negative relationship between canopy cover and the number of understory herbaceous species. Thus, the interception of light and the restriction of its amount for other species is a main factor supporting the negative influence of A. negundo on native plant communities.