Plant strategies for nitrogen acquisition and their effects on exotic plant invasions

Chen, Jixin; Wei-Wei, FENG; Chang, Zhang; Huang, Kai; Guan, Mei; Sun, Jing; Liu, Mingchao; Feng, Ying

doi:10.17520/biods.2020072

Cited by 8 publications

(8 citation statements)

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“…Our results showed that species, soil N levels, planting methods, and competition all affected N form preferences. Plants also have plasticity in N form acquisition ( Hu et al., 2019 ; Zhang et al., 2018 ; Qian et al., 2021 ; Sun et al., 2021 ). For example, the dominant species Kobresia myosuroides in alpine meadow prefers nitrate N in monoculture, but ammonium when mixed with the non-dominant species Mertensia lanceolate ( Ashton et al., 2010 ).…”

Section: Discussionmentioning

confidence: 99%

“…However, some exotic plant species have higher resource utilization efficiencies, and can invade barren habitats ( Liu et al., 2017a ). In addition, the effects of N forms on exotic plant invasions have received little attention ( Sun et al., 2021 ; Luo et al., 2022 ; Zhang et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Ammonium and nitrate are the two main N sources that can be directly absorbed by plants from soils, but their relative contents (proportions) in soils are variable with habitats ( Sun et al., 2021 ). The proportion of nitrate N in atmospheric N deposition is increasing gradually ( Liu et al., 2013 ; Yu et al., 2019 ), which may affect soil N forms, and then plant growth ( Sun et al., 2021 ). Some plants always prefer to absorb a specific form of soil N in nature, and plants perform better under their preferred N form than under other N forms ( Rossiter-Rachor et al., 2009 ; Vu et al., 2021 ; Luo et al., 2022 ; Zhang et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…However, most of the related studies that focused on the effects of N forms on the performance of plants were mainly conducted in monoculture, and little attention was paid to the effects in the fields under competitive conditions. It has been demonstrated that interspecific competition changes plants’ preference for N forms ( Sun et al., 2021 ). In addition, most of the competition experiments between invasive and native plants were conducted in pots under controlled conditions, which is difficult to truly reflect the competitive relationship between plants under natural conditions.…”

Section: Introductionmentioning

confidence: 99%

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Advantages of growth and competitive ability of the invasive plant Solanum rostratum over two co-occurring natives and the effects of nitrogen levels and forms

et al. 2023

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IntroductionAtmospheric nitrogen (N) deposition has often been considered as a driver of exotic plant invasions. However, most related studies focused on the effects of soil N levels, and few on those of N forms, and few related studies were conducted in the fields.MethodsIn this study, we grew Solanum rostratum, a notorious invader in arid/semi-arid and barren habitats, and two coexisting native plants Leymus chinensis and Agropyron cristatum in mono- and mixed cultures in the fields in Baicheng, northeast China, and investigated the effects of N levels and forms on the invasiveness of S. rostratum.ResultsCompared with the two native plants, S. rostratum had higher aboveground and total biomass in both mono- and mixed monocultures under all N treatments, and higher competitive ability under almost all N treatments. N addition enhanced the growth and competitive advantage of the invader under most conditions, and facilitated invasion success of S. rostratum. The growth and competitive ability of the invader were higher under low nitrate relative to low ammonium treatment. The advantages of the invader were associated with its higher total leaf area and lower root to shoot ratio compared with the two native plants. The invader also had a higher light-saturated photosynthetic rate than the two native plants in mixed culture (not significant under high nitrate condition), but not in monoculture.DiscussionOur results indicated that N (especially nitrate) deposition may also promote invasion of exotic plants in arid/semi-arid and barren habitats, and the effects of N forms and interspecific competition need to be taken into consideration when studying the effects of N deposition on invasion of exotic plants.

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