Attenuated asymmetry of above‐ versus belowground stoichiometry to a decadal nitrogen addition during stand development DOI
Shijie Ning,

Xinru He,

Tian Ma

et al.

Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 27, 2024

Abstract Deciphering the linkage between ecological stoichiometry and ecosystem functioning under anthropogenic nitrogen (N) deposition is critical for understanding impact of afforestation on terrestrial carbon (C) sequestration. However, specific changes in above‐ versus belowground stoichiometric asymmetry with stand age response to long‐term N addition remain poorly understood. In this study, we investigated following a decadal three levels (control, no addition; low addition, 20 kg ha −1 year ; high 50 ) young, intermediate, mature stands temperate larch plantations ( Larix principis‐rupprechtii North China. We found that had both (leaf litter) (soil microbe) stoichiometry. contrast, resulted significant stoichiometry, which then diminished during development. Following 10 years inputs, young intermediate transitioned from state relative limitation co‐limitation by phosphorus (P), whereas plantation continued experience limitation. Conversely, soil microorganisms exhibited P all plantations. Broader niche differentiation (N trees, but microorganisms) input may have been responsible faster attainment homeostasis than Our findings provide stoichiometric‐based insight into operating mechanisms large C sinks forests, particularly stock asymmetry, highlight need consider role flexible when forecasting future forest sinks.

Language: Английский

Altitudinal patterns of soil and microbial C:N:P stoichiometry in subtropical forests in Daming Mountain, South China DOI Creative Commons

Chunlin Huo,

Zhonghua Zhang, Yinghua Luo

et al.

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 7, 2025

Introduction Altitude-induced variations in hydrothermal conditions and vegetation affect the carbon (C), nitrogen (N), phosphorus (P) contents both soil microbial biomass. However, specific patterns of changes these nutrients their stoichiometry response to altitudinal remain unclear. Methods In this study, we analyzed biomass C:N:P across three layers (0–20, 20–40, 40–60 cm) subtropical mountain ecosystems on Daming Mountain, South China. Results Our results revealed that C content C:N ratio 0–20 cm layer initially increased then decreased with increasing altitude. Meanwhile, P decreased. Soil altitude all layers, whereas C:P N:P ratios exhibited opposite trends. For along gradient, growth was mainly restricted by P, limitation being more pronounced at mid-to-low altitudes. C, N, were positively correlated ratios, available N (AN), (AP), water (SWC), but negatively bulk density, pH temperature. contrast, stoichiometric or non-significant relationships factors. Notably, AN, AP, SWC dominant factors affecting stoichiometry. Discussion These findings contribute understanding nutrient responses environmental ecosystems.

Language: Английский

Citations

0
Leaf litter breakdown phenology in headwater stream networks is modulated by groundwater thermal regimes and litter type DOI Creative Commons
Danielle K. Hare, Ashley M. Helton, Carolyn S. Cummins

et al.

Limnology and Oceanography Letters, Journal Year: 2024, Volume and Issue: 9(5), P. 532 - 542

Published: July 4, 2024

Abstract Leaf litter dominates particulate organic carbon inputs to forest streams. Using data‐informed simulations, we explored how type (slow‐ vs. fast‐decomposing species), pulsed autumn inputs, groundwater‐mediated temperature regimes, and climate warming affect breakdown in a 3 rd ‐order stream network. We found that the time‐dependent interactions of these variables govern network‐scale phenology, with greater thermal sensitivity slow‐decomposing for both current future scenarios. Groundwater modified phenology by reducing spring summer elevating winter fluxes. Under scenarios, source depth contributing groundwater influenced detrital resources; shallow groundwater‐fed streams had reduced resources compared deep Our results demonstrate predicting in‐stream cycling requires explicit consideration resource seasonal timing environmental factors, notably regimes.

Language: Английский

Citations

2
Response of soil carbon and nitrogen stocks to irrigation - A global meta-analysis DOI

Weihao Sun,

Zhibin He, Dengke Ma

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 957, P. 177641 - 177641

Published: Nov. 23, 2024

Language: Английский

Citations

2
Different grazing management strategies change greenhouse gas emissions and global warming potential in global grasslands DOI Creative Commons
Lingfan Wan, Guohua Liu, Xukun Su

et al.

Geography and sustainability, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 1, 2024

Language: Английский

Citations

1
Impacts of tree species on soil chemical properties in the reforested urban forests DOI Creative Commons
Hongyu Niu, Xiaorong Wang,

Lu Chen

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: May 23, 2024

Abstract Aims: Reforestation has been considered as an effective way to mitigate the adverse environment impacts from urbanization, while role of different reforested forests on urban soil is not well known. This study aims detect forest properties across urban-nonurban gradients and explore whether how trees affect soil. Methods: We collected litter samples in Wuhan (a megacity central China), measured their chemical properties, compared them with surrounding nonurban forests. We then investigated effects three common Pinus massoniana, Camphora officinarum Quercus variabilis soils. Results: found that soils were more acidic but lower N content areas than areas. There significant differences (pH, organic C, N, P) among planted trees, only pH P consistent those Furthermore, C. forest, higher soils, indicating a potential function mitigating acidification. Conclusions: Although urbanization changed tree species used reforestation can through producing various properties. Therefore, biological method, i.e. planting appropriate will be natural solution address problems

Language: Английский

Citations

0
Difference in leaf and root stoichiometric characteristics of Quercus rehderiana Hand.-Mazz. in forests with rocky and non-rocky desertification in Southwest China DOI

Xiao-Long Bai,

Tu Feng,

Shun Zou

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Abstract Quercus rehderiana Hand.-Mazz. is a genus of Quercus in the Fagaceae family, which widely distributed Guizhou Province Southwest China. It has important ecological significance soil and water conservation, species diversity maintenance, climate regulation. To date, researches on stoichiometric characteristics mainly focus leaves, few studies roots. However, difference leaf root between forests with rocky non-rocky desertification are still unclear. In this study, we compared (15 individuals) (9 carbon (C), nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) concentrations their ratios five 20 x m quadrants desertification. The aim was to find resource strategies adaptation nutrient deficient environments Our results show that P K forest were significantly higher than those desertification, Ca Mg opposite. Root N, N:P leaves greater threshold value (16) both rock Leaf concentration positively correlated N C roots negatively concentration. conclusion, showed an obvious nutrients growth Q. limited by P. trade-offs synergies absorption utilization different plant organs similar forests. Therefore, proper addition period can promote development, help improve stability ecosystem. research have practical for vegetation restoration protection

Language: Английский

Citations

0
Responses of Soil Macro-Porosity, Nutrient Concentrations and Stoichiometry Following Conversion of Rice–Wheat Rotation to Organic Greenhouse Vegetable System DOI Creative Commons
Xin Jia, Jianlou Mu, Weiwen Qiu

et al.

Agronomy, Journal Year: 2024, Volume and Issue: 14(10), P. 2207 - 2207

Published: Sept. 25, 2024

To investigate the long-term effects of organic manure on soil macro-porosity and nutrient stoichiometry in greenhouse production, we studied physical chemical properties soils under different vegetable systems Jiangsu Province. These included (OGV), open-field (OFV), conventional (CGV), (CFV), with rice–wheat rotation (RWR) used as a reference.The results showed that, compared to systems, production increased macro-porosity, carbon (SOC), total nitrogen (TN) content, well C:N, C:P, N:P, particularly tilled layer. SOC, TN, phosphorus (TP) levels rapidly during first 14 years OGV cultivation, followed by decline. stoichiometric ratios were significantly positively correlated macro-porosity. The study suggests that converting RWR does not degrade aeration, application impacts retention layer, although are time- depth-dependent. highlights potential improve aeration balance OGV, underscoring importance optimizing fertilizer management intensive agriculture enhance quality crop yield.

Language: Английский

Citations

0
Attenuated asymmetry of above‐ versus belowground stoichiometry to a decadal nitrogen addition during stand development DOI
Shijie Ning,

Xinru He,

Tian Ma

et al.

Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 27, 2024

Abstract Deciphering the linkage between ecological stoichiometry and ecosystem functioning under anthropogenic nitrogen (N) deposition is critical for understanding impact of afforestation on terrestrial carbon (C) sequestration. However, specific changes in above‐ versus belowground stoichiometric asymmetry with stand age response to long‐term N addition remain poorly understood. In this study, we investigated following a decadal three levels (control, no addition; low addition, 20 kg ha −1 year ; high 50 ) young, intermediate, mature stands temperate larch plantations ( Larix principis‐rupprechtii North China. We found that had both (leaf litter) (soil microbe) stoichiometry. contrast, resulted significant stoichiometry, which then diminished during development. Following 10 years inputs, young intermediate transitioned from state relative limitation co‐limitation by phosphorus (P), whereas plantation continued experience limitation. Conversely, soil microorganisms exhibited P all plantations. Broader niche differentiation (N trees, but microorganisms) input may have been responsible faster attainment homeostasis than Our findings provide stoichiometric‐based insight into operating mechanisms large C sinks forests, particularly stock asymmetry, highlight need consider role flexible when forecasting future forest sinks.

Language: Английский

Citations

0