Abstract
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.
Highlights
The plant invasion can biochemically affect the species of native communities [1]
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
The new knowledge as a result of our work is that we did not receive confirmation of the allelopathic activity of A. negundo and H. sosnowskyi transmitted through the soil
Summary
The plant invasion can biochemically affect the species of native communities [1]. It might be resulted by resource competition and influence on other plants by releasing compounds that interfere directly to their growth [1, 2, 3] or influence in other ways [4, 5, 6].That can be the part of plant-soil feedbacks – processes where plants alter the biotic and abiotic properties of soil they grow in, which alters the ability of plants to grow in that soil [7]. The plant invasion can biochemically affect the species of native communities [1]. It might be resulted by resource competition and influence on other plants by releasing compounds that interfere directly to their growth [1, 2, 3] or influence in other ways [4, 5, 6]. The purpose of our work was to assess the influence of soils from dense thickets of two invasive plants on seed germination of two native plants. In case of confirmation of hypothesis such effect could be considered as one way of environment-forming influence and competitive success of invasive plants
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