Research progress and prospect on the impacts of resource pulses on alien plant invasion

Qin, Wenchao; Tao, Zhibin; Wang, Yongjian; Liu, Yanjie; Wei, Huang

doi:10.17521/cjpe.2021.0068

Cited by 4 publications

(3 citation statements)

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“…A more developed root system reflects a better moisture and mineral absorption capacity of Italian cocklebur than that of oil sunflower, which enables the first to obtain more moisture and mineral nutrition from the limited soil resource pool, demonstrating strong interspecific competitiveness and, thus, negatively affecting oil sunflower growth. Exotic plants invade more successfully when there is a lack of strong native resource competitors or sufficient available resources in the community [39]. Both under low-and high-water-supply conditions, the plant height, crown width, base diameter, and root, stem, leaf, and total biomass of Italian cocklebur under interplanting conditions were significantly higher than those under monoculture conditions, indicating that the intraspecific competition intensity of the alien weed is significantly higher than the competition suppressed in oil sunflower.…”

Section: Discussionmentioning

confidence: 99%

The Interspecific Competition of Xanthium italicum Moretti Significantly Reduces the Growth of Helianthus annuus and the Yield and Quality of Its Seeds

Ma¹,

Li²,

Dong³

et al. 2022

Pol. J. Environ. Stud.

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The alien weed Xanthium italicum (Italian cocklebur) severely decreases the Helianthus annuus (oil sunflower) seed yield; however, its mechanisms remain unknown. To explore the relative intensity of competition between the two plants and to test the hypothesis that interspecific competitive pressure from Italian cocklebur causes a reduction in the yield and quality of oil sunflower seeds, a replacement experiment using the two species was performed under simulated common water-supply conditions of sunflower farmlands, and differences in growth parameters, seed yield, and seed quality of oil sunflower between monoculture and interplanting conditions were compared. The results showed that compared with those under monoculture conditions, the seed yield (biomass), oil content, and 1000-seed weight of oil sunflower interplanted with Italian cocklebur decreased by 7.75%, 23.48%, and 13.86%, respectively, under low water supply. Moreover, these parameters were reduced by 19.85%, 24.36%, and 16.19%, respectively, under high water supply. The interspecific competitive intensity of X. italicum was significantly higher than that of oil sunflower under both water-supply conditions. Given the competitive inhibition from the exotic plant, the vegetative and reproductive growth of the native crop was significantly impaired, and its seed yield and oil content were significantly reduced.

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Section: Discussionmentioning

confidence: 99%

The Interspecific Competition of Xanthium italicum Moretti Significantly Reduces the Growth of Helianthus annuus and the Yield and Quality of Its Seeds

Ma¹,

Li²,

Dong³

et al. 2022

Pol. J. Environ. Stud.

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“…Davis et al (2000) suggested that resource fluctuations could enhance the success of alien plant invasions in native communities. The fluctuating resource hypothesis has garnered increasing attention over the past decade (Qin et al, 2021; van Kleunen et al, 2018) and appears to have general support (Gao et al, 2021; Parepa et al, 2013; Shi et al, 2022; Zheng et al, 2020). However, the majority of studies have focused on direct effects of nutrient fluctuations on alien plant invasions, leaving the role of higher trophic levels in modulating nutrient‐fluctuation effects largely unexamined.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of arbuscular mycorrhizal fungi on plant invasion success driven by nitrogen fluctuations

Zhang,

Liu

2023

Journal of Applied Ecology

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Both enemies and mutualists play crucial roles in shaping plant invasion processes. Recent studies have suggested that resource fluctuations could indirectly promote plant invasion through higher trophic levels, such as enemies. However, the influence of mutualists like arbuscular mycorrhizal fungi (AMF) on plant invasion under nitrogen fluctuations remains untested. We conducted a pot mesocosm experiment using a three‐factorial experimental design to assess the individual and interactive effects of nitrogen availability, nitrogen fluctuation and AMF on invasive success of alien plants. We grew nine invasive alien species alongside five different native communities in pot mesocosms. These were then subjected to varied nitrogen availabilities (low vs. high), nitrogen fluctuations (constant vs. pulsed) and AMF presence or absence within a sterile substrate. We found that pulsed nitrogen supply increased the dominance of invasive alien species in low nitrogen availability, regardless of the presence or absence of AMF inoculation. However, in high nitrogen availability, pulsed nitrogen supply only enhanced this dominance in pots without AMF inoculation. This was tentatively evidenced by the three‐way interaction among nitrogen‐availability, nitrogen‐fluctuation and AMF‐inoculation treatments. Furthermore, the dominance promotion by nitrogen addition was greater than that by AMF inoculation. Synthesis and applications. Our findings present, for the first time, evidence that AMF may play a crucial role in mediating the promotion effects of nitrogen fluctuations on alien plant invasion. To better understand the invasion process of alien plants and evaluate their impact on native communities, future research should integrate abiotic and biotic drivers into a single framework. Furthermore, our findings underscore the importance of prioritizing habitats with higher nutrient availability and variability for protection against alien plant invasions.

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High interspecific competitiveness of the invasive plant Xanthium italicum Moretti severely reduces the yield and quality of Carthamus tinctorius L.

Hou

2023

Sci Rep

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Safflower is an annual herb of Compositae, which has great economic value. To explore the impact of invasive weed Xanthium italicum Moretti on the economic crop safflower, field experiments were conducted, the growth-related characters and the relative intensity of competition between the two species was explored. The results showed that under monoculture conditions, the stem height, crown width, stem diameter and the biomass of X. italicum root, stem and leaves were 1.14, 1.96, 1.82, 4.42, 4.21 and 3.99 times as high as those of safflower, respectively. When the two species coexisted, the growth related characters of X. italicum were further significantly improved, while the growth related characters of safflower were significantly decreased. When coexisted with X. italicum, the corolla biomass, hydroxysafflor yellow A content of corolla, seed yields, 100-seed weight, and seed oil content of safflower in the interplanted treatment 90.04%, 33.11%, 63.89%, 40.58%, and 25.61% lower than those in the monocultured treatment, respectively. Relative yield (RY) and Competitive balance index (CB) of X. italicum and safflower showed that the interspecific competitiveness of X. italicum was significantly higher than that of safflower. Under the competitive inhibition of X. italicum, not only the vegetative growth, but also the reproductive growth, yield, and quality of the economic organs of safflower were significantly negatively impacted. Together, our findings provide important scientific basis for evaluating the invasion risks and consequences of safflower’s cropland ecosystem by X. italicum.

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Research progress and prospect on the impacts of resource pulses on alien plant invasion

Cited by 4 publications

References 0 publications

The Interspecific Competition of <i>Xanthium italicum</i> Moretti Significantly Reduces the Growth of <i>Helianthus annuus</i> and the Yield and Quality of Its Seeds

The Interspecific Competition of <i>Xanthium italicum</i> Moretti Significantly Reduces the Growth of <i>Helianthus annuus</i> and the Yield and Quality of Its Seeds

Effects of arbuscular mycorrhizal fungi on plant invasion success driven by nitrogen fluctuations

High interspecific competitiveness of the invasive plant Xanthium italicum Moretti severely reduces the yield and quality of Carthamus tinctorius L.

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