Drivers of growth and establishment of the invasive plant Rumex acetosella within Andean fallow systems

Visscher, Anna M.; Wellstein, Camilla; Vanek, Steven J.; Bricca, Alessandro; Meza, Katherin; Huaraca, Jhon; Ccanto, Raul; Olivera, Edgar; Loayza, Jose Luis; Vigil, Lionel; Palomino, Samuel; Scurrah, Martin; Zerbe, Stefan; Bonari, Gianmaria; Fonte, Steven J.

doi:10.1016/j.agee.2023.108446

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…Exotic species have invaded these austral forests since European colonization, and they became one of the main drivers of change, modifying the species assemblage of native forests. For example, Rumex acetosella has become one of the most frequent introduced species in disturbed environments since 1580 in the Magellan Strait [43,44], while Achillea millefolium was first reported in 1906 in Argentina and was identified as a weed that invades native grasslands [45]. Hieracium pilosella was more recently found during the 1990s [46], especially after disturbances (e.g., fires and overgrazing) [47][48][49], and was pointed as the biggest threat for profitable livestock farming [50,51].…”

Section: Introductionmentioning

confidence: 99%

Anthropogenic Impacts Allowed for the Invasion of Understory Species, Affecting the Sustainability of Management Practices in Southern Patagonia

Rosas,

Peri,

Cellini

et al. 2024

Land

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Forest management aims to preserve integrity and ecosystem resilience. Conservation and species invasion patterns must be determined in managed landscapes. The objectives of this study were to identify proxies that allowed plant species invasion (natives and exotics) and define thresholds of human impacts to improve management. We also wanted to identify indicator species for different impacts and environments. A total of 165 plots were measured in Nothofagus antarctica forests and associated open lands (dry and wet grasslands) in Tierra del Fuego (Argentina). We found differences in the studied variables across the landscape and among different uses and impacts. Human impacts influence land types, emphasizing the importance of managing intensities. Indicator plant species allowed for the identification of potential ecological thresholds related to human impacts and the establishment of species linked to ecological and economic degradation, e.g., Bolax gummifera and Azorella trifurcata (cushion plants) were associated with high grazing pressure in grasslands and fires in forested areas, while Rumex acetosella and Achillea millefolium (erect herbs), typically associated with forested areas, were related to high harvesting pressures and fire impacts. These findings contribute to our understanding of the long-term effects of some human impacts (e.g., harvesting and ranching) and allow us to define variables of monitoring and indicator species for each impact type.

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Section: Introductionmentioning

confidence: 99%

Anthropogenic Impacts Allowed for the Invasion of Understory Species, Affecting the Sustainability of Management Practices in Southern Patagonia

Rosas,

Peri,

Cellini

et al. 2024

Land

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“…Semi-natural habitats play a unique role in agroecosystems. They provide services such as food and nesting resources for pollinators 15 , 16 and natural enemies 17 , 18 , while also functioning as a potential reservoir for herbivorous insects 19 and source of weed establishment 20 , 21 within a crop field. Therefore, the community composition and trait expression of a plant community are important in mediating the effects of wild plants on ecosystem function in agricultural systems 22 – 24 .…”

Section: Introductionmentioning

confidence: 99%

Agricultural landscape simplification affects wild plant reproduction indirectly through herbivore-mediated changes in floral display

Schroeder,

Salzberg,

Grab

et al. 2024

Sci Rep

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As natural landscapes are modified and converted into simplified agricultural landscapes, the community composition and interactions of organisms persisting in these modified landscapes are altered. While many studies examine the consequences of these changing interactions for crops, few have evaluated the effects on wild plants. Here, we examine how pollinator and herbivore interactions affect reproductive success for wild resident and phytometer plants at sites along a landscape gradient ranging from natural to highly simplified. We tested the direct and indirect effects of landscape composition on plant traits and reproduction mediated by insect interactions. For phytometer plants exposed to herbivores, we found that greater landscape complexity corresponded with elevated herbivore damage, which reduced total flower production but increased individual flower size. Though larger flowers increased pollination, the reduction in flowers ultimately reduced plant reproductive success. Herbivory was also higher in complex landscapes for resident plants, but overall damage was low and therefore did not have a cascading effect on floral display and reproduction. This work highlights that landscape composition directly affects patterns of herbivory with cascading effects on pollination and wild plant reproduction. Further, the absence of an effect on reproduction for resident plants suggests that they may be adapted to their local insect community.

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“…At the same time, native species and abiotic environmental factors (moisture, temperature, etc.) have a continuous impact on establishment, reproduction, and population growth ( Visscher et al., 2023 ).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting establishment and population growth of the invasive weed Ambrosia artemisiifolia

Zhao,

Xue,

Liu

et al. 2023

Front. Plant Sci.

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Ambrosia artemisiifolia is a highly invasive weed. Identifying the characteristics and the factors influencing its establishment and population growth may help to identify high invasion risk areas and facilitate monitoring and prevention efforts. Six typical habitats: river banks, forests, road margins, farmlands, grasslands, and wastelands, were selected from the main distribution areas of A. artemisiifolia in the Yili Valley, China. Six propagule quantities of A. artemisiifolia at 1, 5, 10, 20, 50, and 100 seeds m-2 were seeded by aggregation, and dispersion in an area without A. artemisiifolia. Using establishment probability models and Allee effect models, we determined the minimum number of seeds and plants required for the establishment and population growth of A. artemisiifolia, respectively. We also assessed the moisture threshold requirements for establishment and survival, and the influence of native species. The influence of propagule pressure on the establishment of A. artemisiifolia was significant. The minimum number of seeds required varied across habitats, with the lowest being 60 seeds m-2 for road margins and the highest being 398 seeds for forests. The minimum number of plants required for population growth in each habitat was 5 and the largest number was 43 in pasture. The aggregation distribution of A. artemisiifolia resulted in a higher establishment and survival rate. The minimum soil volumetric water content required for establishment was significantly higher than that required for survival. The presence of native dominant species significantly reduced the establishment and survival rate of A. artemisiifolia. A. artemisiifolia has significant habitat selectivity and is more likely to establish successfully in a habitat with aggregated seeding with sufficient water and few native species. Establishment requires many seeds but is less affected by the Allee effect after successful establishment, and only a few plants are needed to ensure reproductive success and population growth in the following year. Monitoring should be increased in high invasion risk habitats.

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Drivers of growth and establishment of the invasive plant Rumex acetosella within Andean fallow systems

Cited by 4 publications

References 42 publications

Anthropogenic Impacts Allowed for the Invasion of Understory Species, Affecting the Sustainability of Management Practices in Southern Patagonia

Anthropogenic Impacts Allowed for the Invasion of Understory Species, Affecting the Sustainability of Management Practices in Southern Patagonia

Agricultural landscape simplification affects wild plant reproduction indirectly through herbivore-mediated changes in floral display

Factors affecting establishment and population growth of the invasive weed Ambrosia artemisiifolia

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