Változott-e a növényzet és az elözönlöttség mértéke kiskunsági homoki gyepekben és parlagokon az elmúlt évtizedben? – Egy megismételt vizsgálat eredményei

Csecserits, Anikó; Berki, Boglárka Méreiné; Botta‐Dukát, Zoltán; Csákvári, Edina; Halassy, Melinda; Mártonffy, András; Rédei, Tamás; Szitár, Katalin

doi:10.20332/tvk-jnatconserv.2022.28.13

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…In Europe, especially in Central Europe, it exhibits invasive behavior (Hansen, 1976;Wiersema & Le on, 2013). In Hungary, in sandy, dry habitats and on open surfaces, particularly in the protected Kolon Lake area, it has appeared in increasing numbers and abundance in recent years (Bakacsy et al, 2023;Csecserits et al, 2022;Moln ar et al, 2019;Simon, 2000).…”

Section: Introductionmentioning

confidence: 99%

The allelochemical potential of an invasive ornamental plant, the Indian blanket flower (Gaillardia pulchella Foug.)

Nagy,

Kardos,

Orbán

et al. 2023

Plant Species Biology

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Global spread of invasive plant species threatens biodiversity significantly, with a particularly high presence of invasives in the Asteraceae family. This is partly due to their wide use as ornamental plants and their rapid reproduction and allelopathy. The Indian blanket flower (Gaillardia pulchella) is a native North American species widely used as an ornamental plant and has become invasive in other countries. Although it contains bioactive compounds, its allelopathic impact on other plants has been largely unexplored. We conducted in vitro tests on oilseed rape (Brassica napus) germination and early growth to assess blanket flower's allelopathy. Seeds were exposed to aqueous extracts at three different concentrations (10%, 20%, and 40%). The 40% extract significantly inhibited germination during the treatment. All three concentrations inhibited root growth, with the 40% treatment showing this effect from the second day. In contrast, the extracts promoted significantly shoot elongation. Fresh weight of seedlings was not affected by the extract, but the 10% treatment resulted in higher mass. These findings provide evidence of blanket flower's allelopathic effects, shedding light on its invasive potential.

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Section: Introductionmentioning

confidence: 99%

The allelochemical potential of an invasive ornamental plant, the Indian blanket flower (Gaillardia pulchella Foug.)

Nagy,

Kardos,

Orbán

et al. 2023

Plant Species Biology

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Drone-Based Identification and Monitoring of Two Invasive Alien Plant Species in Open Sand Grasslands by Six RGB Vegetation Indices

Bakacsy

Tobak

Leeuwen

et al. 2023

Drones

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Today, invasive alien species cause serious trouble for biodiversity and ecosystem services, which are essential for human survival. In order to effectively manage invasive species, it is important to know their current distribution and the dynamics of their spread. Unmanned aerial vehicle (UAV) monitoring is one of the best tools for gathering this information from large areas. Vegetation indices for multispectral camera images are often used for this, but RGB colour-based vegetation indices can provide a simpler and less expensive solution. The goal was to examine whether six RGB indices are suitable for identifying invasive plant species in the QGIS environment on UAV images. To examine this, we determined the shoot area and number of common milkweed (Asclepias syriaca) and the inflorescence area and number of blanket flowers (Gaillardia pulchella) as two typical invasive species in open sandy grasslands. According to the results, the cover area of common milkweed was best identified with the TGI and SSI indices. The producers’ accuracy was 76.38% (TGI) and 67.02% (SSI), while the user’s accuracy was 75.42% (TGI) and 75.12% (SSI), respectively. For the cover area of blanket flower, the IF index proved to be the most suitable index. In spite of this, it gave a low producer’s accuracy of 43.74% and user’s accuracy of 51.4%. The used methods were not suitable for the determination of milkweed shoot and the blanket flower inflorescence number, due to significant overestimation. With the methods presented here, the data of large populations of invasive species can be processed in a simple, fast, and cost-effective manner, which can ensure the precise planning of treatments for nature conservation practitioners.

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Változott-e a növényzet és az elözönlöttség mértéke kiskunsági homoki gyepekben és parlagokon az elmúlt évtizedben? – Egy megismételt vizsgálat eredményei

Cited by 2 publications

References 30 publications

The allelochemical potential of an invasive ornamental plant, the Indian blanket flower (Gaillardia pulchella Foug.)

The allelochemical potential of an invasive ornamental plant, the Indian blanket flower (Gaillardia pulchella Foug.)

Drone-Based Identification and Monitoring of Two Invasive Alien Plant Species in Open Sand Grasslands by Six RGB Vegetation Indices

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