Changes in soil biochemical properties associated with Ligularia virgaurea spreading in grazed alpine meadows

Shi, Xiaomei; Li, Xiao Gang; Wu, Rong Mei; Yang, Yun; Long, R. J.

doi:10.1007/s11104-011-0818-7

Cited by 13 publications

(13 citation statements)

References 47 publications

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“…Shi et al . found that L. virgaurea appeared mostly in extremely degraded grassland and could increase the N mineralization and N concentration of top soil in the alpine meadow on the Tibetan Plateau37, which support our result that L. virgaurea is N stress tolerant. The growth of S. officinalis was not affected by N addition (except its leaf length was elongated by increased N when neighbours were retained), implying that N might not be the main limiting factor for this species in our experimental site, and this species could be classified as having intermediate N sensitivity.…”

Section: Discussionsupporting

confidence: 90%

Different responses of alpine plants to nitrogen addition: effects on plant-plant interactions

Wang

Luo

Mou

et al. 2016

Sci Rep

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The different responses of plant species to resource stress are keys to understand the dynamics of plant community in a changing environment. To test the hypothesis that nitrogen (N) increase would benefit N competitive species, rather than N stress-tolerant species, to compete with neighbours, we conducted an experiment with neighbour removal, N addition and soil moisture as treatments in an alpine grassland on the southeastern Tibetan Plateau. Both growths and competitive-response abilities (CRA, the ability to tolerate the inhibitory effects of neighbors) of Kobresia macrantha, Polygonum viviparum and Potentilla anserine in wet site were facilitated by N addition, conversely, both growths and CRA of Taraxacum mongolicum and Ligularia virgaurea were suppressed by N addition, indicating that the responses of CRA of target species under N addition were consistent with the N utilization strategies of them. Moreover, the facilitative effects of N addition on competitive-response abilities of Kobresia macrantha and Polygonum viviparum were not found at the dry site, illustrating that soil moisture can alter the changes of neighbour effects caused by N addition. Life strategy of dominant species in plant community on the undisturbed southeastern Tibetan Plateau may shift from N stress-tolerant to N competitive, if the N increases continuously.

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Section: Discussionsupporting

confidence: 90%

Different responses of alpine plants to nitrogen addition: effects on plant-plant interactions

Wang

Luo

Mou

et al. 2016

Sci Rep

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“…Soils are classified as alpine meadow soils according to the Chinese soil classification system (Institute of Soil Science, ). The surface 0–16 cm soil layer has a pH of 6.7 and contains 5.8% organic C, .0.41 g/kg N (with 4 mg/kg

{NH}_{4}^{+}

and 13.5 mg/kg

{NO}_{3}^{-}

) and total P of 1.0 g/kg (Shi, Li, Wu, Yang, & Long, ). Above‐ground litter dry‐matter production averaged 505 g m −2 year −1 , comprising approximately 0.78 leaf, 0.16 stem and 0.06 reproductive parts.…”

Section: Methodsmentioning

confidence: 99%

Interacting effects of yak dung deposition and litter quality on litter mass loss and nitrogen dynamics in Tibetan alpine grassland

Liang

Niu

Zhang

2017

Grass and Forage Science

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The effects of grazing‐induced dung deposition on plant growth and soil attributes are well established, but little is known about dung effects on litter decomposition. Here, we tested effects of yak dung on litter decomposition and nutrient content in a Tibetan alpine meadow. We incubated litter of four common alpine meadow species using litter bags in the field. Two low‐quality species (Kobresia capillifolia and Elymus nutans) with low nitrogen (N), high C/N and Lignin/N, and two high‐quality species, (Saussurea nigrescens and Thermopsis lanceolata) were incubated in monoculture with and without dung addition. Mass loss of leaf litter, fibre fraction (cellulose, hemi‐cellulose and lignin), N and phosphorus (P) were measured after 6, 12 and 18 months of incubation in the field. Dung addition significantly increased decomposition constants for low‐quality litter species, but not for high‐quality litter species. Dung addition promoted cellulose and hemi‐cellulose loss, but lignin loss was not affected by dung addition, except after 12 months for high‐quality litter species. Dung reduced N immobilization after 6 months and did not affect subsequent release in low‐quality litter species, and promoted N release after 6 and 12 months in high‐quality litter species. Regardless of litter quality, dung increased P release after 6 and 12 months. Our results suggest grazing‐induced dung deposition may accelerate C and nutrient turnover, primarily through increasing the mass loss of low‐quality litter, P release from litter and N release from high‐quality litter. The mechanisms underlying the effects of dung deposition need to be clarified in future studies.

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“…These findings agree with many previous studies showing that the AM fungal communities were determined by both plant communities [65] and some environmental factors [13], [14], and highlight the importance of deterministic process based on niche differentiation in driving the community assembly of AM fungi. In fact, changes of plant community and soil properties in this study should be ultimately attributed to the spreading of L. virgaurea , because its spreading could suppress the seedling recruitment of neighborhood plants by allelochemicals [36] as well as change soil characteristics via changing the activities of soil enzymes [66]. Further studies are encouraged to address how L. virgaurea spreading directly and indirectly regulates the AM fungal assemblages in alpine meadow ecosystems.…”

Section: Discussionmentioning

confidence: 91%

Relative Importance of Deterministic and Stochastic Processes in Driving Arbuscular Mycorrhizal Fungal Assemblage during the Spreading of a Toxic Plant

et al. 2014

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Both deterministic and stochastic processes are expected to drive the assemblages of arbuscular mycorrhizal (AM) fungi, but little is known about the relative importance of these processes during the spreading of toxic plants. Here, the species composition and phylogenetic structure of AM fungal communities colonizing the roots of a toxic plant, Ligularia virgaurea, and its neighborhood plants, were analyzed in patches with different individual densities of L. virgaurea (represents the spreading degree). Community compositions of AM fungi in both root systems were changed significantly by the L. virgaurea spreading, and also these communities fitted the neutral model very well. AM fungal communities in patches with absence and presence of L. virgaurea were phylogenetically random and clustered, respectively, suggesting that the principal ecological process determining AM fungal assemblage shifted from stochastic process to environmental filtering when this toxic plant was present. Our results indicate that deterministic and stochastic processes together determine the assemblage of AM fungi, but the dominant process would be changed by the spreading of toxic plants, and suggest that the spreading of toxic plants in alpine meadow ecosystems might be involving the mycorrhizal symbionts.

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Changes in soil biochemical properties associated with Ligularia virgaurea spreading in grazed alpine meadows

Cited by 13 publications

References 47 publications

Different responses of alpine plants to nitrogen addition: effects on plant-plant interactions

Different responses of alpine plants to nitrogen addition: effects on plant-plant interactions

Interacting effects of yak dung deposition and litter quality on litter mass loss and nitrogen dynamics in Tibetan alpine grassland

Relative Importance of Deterministic and Stochastic Processes in Driving Arbuscular Mycorrhizal Fungal Assemblage during the Spreading of a Toxic Plant

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