Shifts in plant and soil C, N, and P concentrations and C:N:P stoichiometry associated with environmental factors in alpine marshy wetlands in West China

Wu, Guiling; Gao, Jay; Li, Honglin; Ren, Fei; Liang, Defei; Li, Xilai

doi:10.1016/j.catena.2022.106801

Cited by 15 publications

(8 citation statements)

References 53 publications

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“…Considerable nutrient variation can be observed both among the same organs of different plants and among different organs of the individual plant (Figure 2). This finding is consistent with previous studies conducted on vegetation types in western alpine swamp wetlands (Wu et al, 2023), and typical dune vegetation in the Yarlung Tsangpo River (Dong, Yang, et al, 2023). The driving factor behind this phenomenon is the different N and P demands across various halophytes, which consequently influence photosynthesis and carbon allocation capacities, thereby leading to nutrient content and ratio variations among these plants (Li, Sun, & Fu, 2021).…”

Section: Discussionsupporting

confidence: 93%

Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

Zhao,

Li,

Sun

et al. 2023

Land Degrad Dev

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Ecological stoichiometric homeostasis represents the physiological and biochemical adaptations of organisms to variations in environmental conditions and plays a pivotal role in maintaining ecosystem stability. However, existing literature predominantly concentrates on the changes in plant homeostasis under different external environments. There is a paucity of comparative analyses focusing on the stoichiometric homeostasis attributes among different types of halophytes, particularly using these halophytes as a primary investigative lens. In this study, by analyzing the differences in organ and soil ecological stoichiometry as well as salt accumulation characteristics of three halophytes (Phragmites communis, Suaeda salsa, and Tamarix chinensis) in the Yellow River Delta, we revealed the salt ion enrichment capacity and stoichiometric homeostasis characteristics of the three halophytes and clarified the adaptive capacity of the three halophytes in saline soil environments. Our results indicated that S. salsa accumulated more Na+ and Mg2+, while P. communis maintained a low salt content in its surrounding soil. The soil C:N ratios of P. communis and S. salsa negatively correlated with most ions, while T. chinensis displayed a positive correlation with ions. S. salsa demonstrated the highest ion enrichment but the least homeostasis, whereas T. chinensis showed superior homeostasis. We hypothesize that T. chinensis might have experienced a faster growth rate during the study period, and P. communis' topsoil appears to be more conducive for plant growth. The different salt tolerance strategies of these plants influenced homeostasis, with S. salsa demonstrating greater adaptability to soil modifications and higher potential in saline land management. These insights enhance our understanding of the physiological and ecological adaptations of halophytes and their contribution to improving the quality of saline soils in the Yellow River Delta.

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Section: Discussionsupporting

confidence: 93%

Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

Zhao,

Li,

Sun

et al. 2023

Land Degrad Dev

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“…Leaf nutrient content, which is a very important component in the nutrient cycle, is affected by various edaphic factors (physicochemical structure and nutrient content of the soil, moisture, temperature, microorganisms, etc.) (Liu et al, 2017;Wu et al, 2023). In our analyzes, the effectiveness of edaphic factors on plants was once again demonstrated by the consistency of C and N ratios obtained in soil and leaves on a species basis.…”

Section: Plant Leaves and Soil Physiochemical Properties And Tannin C...supporting

confidence: 55%

The influence of tannins purified from Eastern Mediterranean Region plants (Pinus brutia Ten. and Quercus coccifera L.) on carbon mineralization: Antimicrobial and antimutagenic evaluation

Ulusu

Darici

2023

Anatolian Journal of Botany

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Tannins, which are polyphenols with a wide variety of quality-quantity that control the carbon and nitrogen cycle in forest ecosystems, are very interesting because of their protein binding abilities and forming a complex structure with other compounds. In this study, the purified tannin content of Pinus brutia Ten. and Quercus coccifera L., the two dominant plant species of the Eastern Mediterranean region, and the effect of these tannins on C dynamics in a forest soil (O and A horizon) were evaluated. In addition, antimicrobial effects of tannin extracts on Bacillus subtilis, Staphylococcus aureus and Proteus mirabilis bacteria by disc diffusion method and antimutagenic effects on Allium cepa root tip cells were evaluated. Total phenol (TP) and condense tannins (CT) concentrations of P. brutia and C. coccifera leaves ranged from 0.78–1.33 μg/100mg DW and 4.68–1.35 μg/100mg DW, respectively. With the addition of tannin extract to the soils, C mineralization (27th day) was significantly reduced compared to the control group. Both P. brutia tannin extract (PTE) and C. coccifera tannin extract (QTE) exhibited antibacterial activity in the range of 8±0.21–35±1.12 mm zone diameter by inhibiting their microbial growth against test microorganisms. In addition, tannin treatments caused a dose-dependent mitotic index decrease in onion root tip cells and a serious inhibition by showing toxic effects on mitotic division stages. As a result, our data showed that C mineralization in soil is affected by different tannin sources and these tannin extracts have significant antimicrobial activity against pathogens and cytotoxic activity in Allium cepa root tip cells.

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“…Soil P content is always affected by plant absorption and soil leaching. In this study, no significant variation of leaf P and N: P for all the plant life‐forms was found after 18‐year N additions (Table 1), which implied that N addition may not change plant P demand (Reich & Oleksyn, 2004, Wu et al, 2023). Moreover, a previous study reported that 14‐year N addition did not decrease total dissolved P flux in leachate in our forest (Zhou et al, 2018).…”

Section: Discussionmentioning

confidence: 61%

“…Soil P content is always affected by plant absorption and soil leaching. In this study, no significant variation of leaf P and N: P for all the plant life-forms was found after 18-year N additions (Table 1), which implied that N addition may not change plant P demand (Reich & Oleksyn, 2004, Wu et al, 2023.…”

Section: Response Of Soil P Supply To N Additionmentioning

confidence: 54%

Eighteen‐year nitrogen addition does not increase plant phosphorus demand in a nitrogen‐saturated tropical forest

Chen

et al. 2023

Journal of Ecology

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Nitrogen (N) deposition usually increases plant tissue N concentrations and thus phosphorus (P) demand in young and/or N‐limited forests, but the N deposition effect on plant P demand has rarely been assessed in N‐saturated forests. Impacts of 18‐year external N additions (Control: 0, Low N: 50, Moderate N:100 and High N: 150 kg N ha−1 year−1) on leaf P of four plant life‐forms (tree, shrub, herb and liana), P fractions of bulk and rhizosphere soils were examined in a N‐saturated mature tropical forest in southern China. Leaf N, P and N: P ratios of all plant life‐forms remained stable under three N additions. Among soil P fractions, moderate labile organic P increased by 25%–33% across three N additions; and soil total P was increased by 11.76% under Low N, and 8.87% under High N, compared with the control. The PLS‐PM results showed that path coefficient of microbial community to available P significantly increased and of inorganic P to available P significantly decreased under N additions than control. N additions improved soil P availability through microbe‐mediated P transformation: Low N significantly increased soil microbial taxonomic diversity, and a higher microbial diversity could enlarge the sources of nutrient acquisition and stimulate decomposition of recalcitrant organic matters; while High N significantly decreased soil microbial taxonomic diversity, the remaining microorganisms that were screened by N‐rich environments had the characteristics of resisting the N addition effects and maintained efficient P acquisition. Synthesis. Our findings provide a novel line of evidence that long‐term N deposition did not increase plant P demand in a N‐saturated mature tropical forest. The underlying mechanism is that plants did not increase N uptakes therefore nor increase P uptakes (a stable leaf N: P stoichiometry) in an already N‐saturated ecosystem. Different N addition rates regulated soil P transformation via microbial community transition. These findings help improve the understanding of plant P acquisition and modelling of biogeochemical N–P cycling and vegetation productivity in N‐rich forest ecosystems, particularly considering the fact that chronic N deposition may likely lead to soil N richness and even saturation of many forests in the future.

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Shifts in plant and soil C, N, and P concentrations and C:N:P stoichiometry associated with environmental factors in alpine marshy wetlands in West China

Cited by 15 publications

References 53 publications

Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

Study on ecological stoichiometry homeostasis characteristics of different halophytes in the Yellow River Delta

The influence of tannins purified from Eastern Mediterranean Region plants (Pinus brutia Ten. and Quercus coccifera L.) on carbon mineralization: Antimicrobial and antimutagenic evaluation

Eighteen‐year nitrogen addition does not increase plant phosphorus demand in a nitrogen‐saturated tropical forest

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