Effects of desertification on the C:N:P stoichiometry of soil, microbes, and extracellular enzymes in a desert grassland

吴秀芝,; 阎欣,; 王波,; 刘任涛,; 安慧,

doi:10.17521/cjpe.2018.0121

Cited by 10 publications

(16 citation statements)

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“…The functional groups of legumes affected the contents of C and N in soil, and the changes in nitrogen fixation and community composition affected the absorption and transformation of C and N in soil (Hooper and Vitousek, 1998 ; Spehn et al, 2002 ). The results showed that the increase in the legume functional group not only affected the diversity of community species but also reduced the loss of soil C and N in the alpine desert grassland (Wen et al, 2013 ; Wu et al, 2018 ). The results indicate that different PFGs would adapt to the changes in the external environment according to their own traits under the same resource environment.…”

Section: Discussionmentioning

confidence: 99%

Variation characteristics of different plant functional groups in alpine desert steppe of the Altun Mountains, northern Qinghai-Tibet Plateau

Zhang

Zeng

et al. 2022

Front. Plant Sci.

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In grassland ecosystems, the plant functional group (PFG) is an important bridge connecting individual plants to the community system. The grassland ecosystem is the main ecosystem type on the Qinghai-Tibet Plateau. Altun Mountain is located in the key grassland transcontinental belt of the northern Qinghai-Tibet Plateau. The composition and changes in the PFG in this ecosystem reflect the community characteristics in the arid and semi-arid extreme climate regions of the Plateau. The main PFGs were forbs and grasses, and the importance values (IVs) accounted for more than 50%. Plant species diversity of the community was influenced by the IV of the legumes, and the increase in legumes would promote the increase in plant community diversity. The C, N, and P contents of plant communities were mainly influenced by forbs and grasses, and the relationship between forbs and C, N, and P was opposite to that of grasses. However, under the influence of different hydrothermal conditions, forbs and grasses as dominant functional groups had a stronger correlation with community and soil nutrients. This indicates that the dominant PFGs (forbs and grasses) can dominate the C, N, and P contents of the community and soil, and legumes affect community composition and succession. In this study, we analyzed the changing characteristics of functional groups in dry and cold extreme environments and the difference in their impacts on community development compared with other grassland ecosystem functional groups.

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Section: Discussionmentioning

confidence: 99%

Variation characteristics of different plant functional groups in alpine desert steppe of the Altun Mountains, northern Qinghai-Tibet Plateau

Zhang

Zeng

et al. 2022

Front. Plant Sci.

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“…(Hooper and Vitousek, 1998;Spehn et al, 2002). In the alpine desert grassland, the increase of legumes function group not only affected the diversity of community species, but also reduced the loss of soil C and N (Wen et al, 2013;Wu et al, 2018). The results indicated that different plant functional groups would adapt to the changes of external environment according to their own traits under the same resource environment.…”

Section: Discussionmentioning

confidence: 99%

Responses of Alpine Grassland Plant Functional Groups To Environmental Changes In The Altunshan At North Qinghai-Tibet Plateau

Zhang

Zeng

et al. 2021

Preprint

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Purpose: In grassland ecosystems, plant functional group (PFG) is an important bridge connecting individual plant to community system. Grassland ecosystem is the main ecosystem type on the Qinghai-Tibet Plateau, so the change of community structure of grassland vegetation.Methods: The Altun Mountains in the northern part of the Qinghai-Tibet Plateau were used as the study area to investigate the PFGs of a high-altitude (> 3700m) grassland in desert areas and their response to temperature and moisture.Results: The main functional groups were forbs and grasses, and the importance values (IV) accounted for more than 50%. Plant species diversity of the community was influenced by the functional groups of legumes IV, and the increase of legumes would promote the increase of plant community diversity. The C, N, P of plant communities were mainly influenced by forbs and grasses, and the relationship between forbs and C, N, P was opposite to that of grasses. There was a positive correlation between forbs and soil TP; a negative correlation between grasses and soil TP; a positive correlation between legumes with soil SOC and TN; and a positive correlation between sedge and soil SOC. However, under the influence of different hydrothermal conditions, forbs and grasses as dominant functional groups had stronger correlation with community and soil nutrients. Conclusions: This indicated that the PFGs with the largest proportion in the community had the greatest influence on the community. This provides a basis for the study of alpine grassland community development and ecosystem function under alpine grassland.

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“…The relatively poor N in soil limited the MBN fixation. Meanwhile, plants increased investment to P-rich ribosomal RNA in P-rich soil environments [18], resulting in the low N:P ratio (Figure 2).…”

Section: Soil Microbial Properties and Stoichiometry Of Z Planispinum...mentioning

confidence: 99%

“…Other scholars [16,17] proposed that the theory of extracellular enzyme stoichiometry can clarify the balance between microbial biomass stoichiometry and soil element composition. Wu et al [18] clarified that there is a strong covariant relationship between soil, microorganisms, and extracellular enzyme stoichiometry. In conclusion, forest soil stoichiometry emphasizes the correlation between soil elements, microorganisms, and extracellular enzymes.…”

Section: Introductionmentioning

confidence: 99%

“…In conclusion, forest soil stoichiometry emphasizes the correlation between soil elements, microorganisms, and extracellular enzymes. Rather than studying them as a continuum [18,19], most studies focus on elements C, N, and P, and pay less attention to potassium (K), calcium (Ca), and magnesium (Mg). In addition, different plantation types produce different litter and root exudates, resulting in different nutrient transport to the soil, further affecting soil element stoichiometry, microbial dynamics, and nutrient cycles [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Stoichiometry of Soil, Microorganisms, and Extracellular Enzymes of Zanthoxylum planispinum var. dintanensis Plantations for Different Allocations

Song

2022

Agronomy

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Plantations with different allocation patterns significantly affect soil elements, microorganisms, extracellular enzymes, and their stoichiometric characteristics. Rather than studying them as a continuum, this study used four common allocations of plantations: Zanthoxylum planispinum var. dintanensis (hereafter Z. planispinum) + Prunus salicina, Z. planispinum + Sophora tonkinensis, Z. planispinum + Arachis hypogaea, and Z. planispinum + Lonicera japonica plantations, as well as a single-stand Z. planispinum plantation as a control. Soil samples from depths of 0–10 and 10–20 cm at the five plantations were used to analyze the element stoichiometry, microorganisms and extracellular enzymes. (1) One-way analysis of variance (ANOVA) showed that the contents of soil organic carbon (C), nitrogen (N), phosphorus (P), and potassium (K) of Z. planispinum + L. japonica plantation were high, while those of calcium (Ca) and magnesium (Mg) were low compared to the Z. planispinum pure plantation; soil microbial and enzyme activities were also relatively high. Stoichiometric analysis showed that soil quality was good and nutrient contents were high compared to the other plantations, indicating that this was the optimal plantation. (2) Two-way ANOVA showed that stoichiometry was more influenced by plantation type than soil depth and their interaction, suggesting that plantation type significantly affected the ecosystem nutrient cycle; soil microbial biomass (MB) C:MBN:MBP was not sensitive to changes in planting, indicating that MBC:MBN:MBP was more stable than soil C:N:P, which can be used to diagnose ecosystem nutrient constraints. (3) Pearson’s correlation and standardized major axis analyses showed that there was no significant correlation between soil C:N:P and MBC:MBN:MBP ratios in this study; moreover, MBN:MBP had significant and extremely significant correlations with MBC:MBN and MBC:MBP. Fitting the internal stability model equation of soil nutrient elements and soil MBC, MBN, and MBP failed (p > 0.05), and the MBC, MBN, and MBP and their stoichiometric ratios showed an absolute steady state. This showed that, in karst areas with relative nutrient deficiency, soil microorganisms resisted environmental stress and showed a more stable stoichiometric ratio. Overall stoichiometric characteristics indicated that the Z. planispinum + L. japonica plantation performed best.

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Effects of desertification on the C:N:P stoichiometry of soil, microbes, and extracellular enzymes in a desert grassland

Cited by 10 publications

References 0 publications

Variation characteristics of different plant functional groups in alpine desert steppe of the Altun Mountains, northern Qinghai-Tibet Plateau

Variation characteristics of different plant functional groups in alpine desert steppe of the Altun Mountains, northern Qinghai-Tibet Plateau

Responses of Alpine Grassland Plant Functional Groups To Environmental Changes In The Altunshan At North Qinghai-Tibet Plateau

Stoichiometry of Soil, Microorganisms, and Extracellular Enzymes of Zanthoxylum planispinum var. dintanensis Plantations for Different Allocations

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