Short‐term effects of the control of the invasive plant <i>Asclepias syriaca</i>: Secondary invasion of other neophytes instead of recovery of the native species

Berki, Boglárka; Botta‐Dukát, Zoltán; Csákvári, Edina; Gyalus, Adrienn; Halassy, Melinda; Mártonffy, András; Rédei, Tamás; Csecserits, Anikó

doi:10.1111/avsc.12707

Cited by 3 publications

(1 citation statement)

References 102 publications

(112 reference statements)

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“…It can recover from rhizomes after cutting or even chemical treatment, and the rhizome fragments left in the soil make it impossible to eradicate. Repeated cutting treatments are more promising, but we lack the knowledge on longer-term management effects and what happens if treatments are stopped (Berki et al 2023). However, repeated treatments can be very costly and some treatments may even lead to further invasion (Valliere et al 2019), so the options for controlling clonal perennial species are limited for now.…”

Section: Effect Of Elapsed Time Restoration Intervention and Invasive...mentioning

confidence: 99%

Restorative seeding controls annual invasive species, but perennials can thrive in the long term despite treatments in sand grassland restoration

Saradi,

Reis,

Csákvári

et al. 2024

Preprint

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Biodiversity loss caused by invasive alien species is a major problem in planetary perspective. Ecological restoration is an important tool to counteract invasions, but invasive species may negatively affect restoration if present in the landscape. We investigated long-term changes in annual and perennial invasive alien species abundance in three sandy grassland restoration experiments. We evaluated the dependence of annual and perennial invasive species abundance on initial restoration intervention, invasive species propagule pressure from the surrounding landscape, and time since interventions. Restoration interventions (seeding, mowing and carbon amendment) were conducted at a total of eight sites in the Kiskunság region of Hungary. The interventions took place between 1995 and 2003 and were monitored for 17–25 years. To assess invasive propagule pressure around the experimental sites, total shoot numbers in adjacent 1 m by 1 m plots along 100-meter-long transects were counted in 2020–2021 from the center of the eight experimental sites. Invasive propagule pressure within a 100-meter buffer did not explain changes in the abundance of annual and perennial invasive species. The cover of annual invasive species has mostly decreased over time, and treatment (mainly seeding) could accelerate this process. The cover of perennial invasive species increased over time irrespective of applied treatments and landscape invasive propagule pressure. Our research showed that seeding with native species is an effective tool for restoring sandy grasslands and preventing the spread of annual invasive species, but our toolbox for preventing perennial invasion in grassland restoration is limited.

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Section: Effect Of Elapsed Time Restoration Intervention and Invasive...mentioning

confidence: 99%

Restorative seeding controls annual invasive species, but perennials can thrive in the long term despite treatments in sand grassland restoration

Saradi,

Reis,

Csákvári

et al. 2024

Preprint

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Suppressing the invasive common milkweed (Asclepias syriaca L.) saves soil moisture reserves

Tölgyesi,

Tóth,

Hábenczyus

et al. 2024

Biol Invasions

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Common milkweed (Asclepias syriaca L.) is a widespread invasive alien forb in dry sandy habitats of Central Europe. It adversely affects native plant and animal communities, but its ecosystem-level effects, particularly on hydrology, are little known. Since milkweed has an extensive, deep root system and large, broad leaves, we assumed a negative effect on the soil moisture content of the hosting ecosystem. Following the before-after control-impact protocol, we first compared the soil moisture content of the top 120 cm of the soil under seven milkweed stands to that of non-invaded reference sites. We then treated half of the stands by mechanically removing all aboveground milkweed biomass and repeated the comparative soil moisture measurements. We found that milkweed stands had significantly drier soils than reference grasslands during the growing season, but the soil under milkweed stands recharged to the level of the references in autumn and winter. However, the amount of moisture needed for this recharge was lost from deeper percolation to groundwater. Milkweed treatment prevented the depletion of moisture during the growing season, saving 21.6 l m−2 of water on average. Treatment did not affect non-milkweed plant biomass, thus, moisture patterns could fully be attributed to the milkweed stands. Our results reinforce the importance of milkweed suppression in invaded grasslands, as, besides enabling the recovery of the native grassland ecosystem, it promotes groundwater recharge, which is particularly important in the dry regions of Central Europe, currently facing severe aridification due to climate change and unfavourable land use trends.

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The Multifaceted Botanical Impact of the Invasive Common Milkweed (Asclepias syriaca L.) in a Protected Sandy Grassland in Central Europe

Meinhardt,

Saláta,

Tormáné Kovács

et al. 2024

Land

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Asclepias syriaca L.is a perennial broad-leaved species native to North America. It has become established in many regions of Europe, and has spread with increasing rapidity in recent decades. Its reproductive behaviour allows this species to proliferate rapidly. The selected grasslands are located in the Carpathian Basin in Hungary, in the area of Kiskunság National Park, near Lake Kolon. In the framework of the research, in two consecutive years (2021 and 2022), and in two different seasons (spring and autumn), we examined the percentage cover of vascular plant species in the stands degraded by A. syriaca and the natural control (without A. syriaca), and their seasonal and interannual dynamics. Between the A. syriaca-degraded and natural control stands, there was no significant difference in the number of species in the spring and autumn of any of the examined years. Surprisingly, in the spring, the degraded stands were somewhat richer in vascular plant species. In autumn, the control stands had more vascular plant species, but to a lesser extent. The Shannon diversity was higher in the A. syriaca-dominated stands than in the control in all recording periods. Simpson diversity showed a similar pattern to Shannon diversity, with one exception in spring 2022. In the case of the social behaviour type, it can be clearly seen that the alien competitor (AC) species dominated in spring and autumn in both years in the stand dominated by A. syriaca. In the natural control stand, specialists (S) and competitors (C) dominated in both years and in both seasons. The negative effect of the invasive species on the number and diversity of species was presumably significantly reduced by the significant drying of the study area experienced in recent years.

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Short‐term effects of the control of the invasive plant Asclepias syriaca: Secondary invasion of other neophytes instead of recovery of the native species

Cited by 3 publications

References 102 publications

Restorative seeding controls annual invasive species, but perennials can thrive in the long term despite treatments in sand grassland restoration

Restorative seeding controls annual invasive species, but perennials can thrive in the long term despite treatments in sand grassland restoration

Suppressing the invasive common milkweed (Asclepias syriaca L.) saves soil moisture reserves

The Multifaceted Botanical Impact of the Invasive Common Milkweed (Asclepias syriaca L.) in a Protected Sandy Grassland in Central Europe

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