Phosphorus storage and allocation in vegetation on the Tibetan Plateau

Ecological Indicators, Journal Year: 2022, Volume and Issue: 145, P. 109636 - 109636

Published: Nov. 7, 2022

• Phosphorus (P) of 2,040 plant communities on the Tibetan Plateau were measured. Active organs (e.g., leaves) had higher P contents but lower densities. Radiation dominated storage and allocation in vegetation Plateau. stored approximately 3.64 Tg P. is critical for growth ecosystem productivity. distribution patterns plants natural are associated with their resource strategies. However, owing to lack systematic research, spatial variations (TP) remain unclear. Based 0.5° standardized grid sampling method survey data obtained from (leaf, branch, trunk, root) communities, we analyzed (g kg −1 ) densities m −2 TP. The results indicate that differed significantly among contained Strong radiation a negative effect accumulation caused more be allocated underground parts. TP P, which 1.68, 1.28, 0.68, 0.01 forests, shrublands, grasslands, deserts, respectively. large dataset, determined distributions constructed density map vegetation, can used modeling.

Language: Английский

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

Land Degradation and Development, Journal Year: 2023, Volume and Issue: 35(2), P. 784 - 797

Published: Oct. 23, 2023

Abstract Ecological stoichiometric homeostasis represents the physiological and biochemical adaptations of organisms to variations in environmental conditions plays a pivotal role maintaining ecosystem stability. However, existing literature predominantly concentrates on changes plant under different external environments. There is paucity comparative analyses focusing attributes among types halophytes, particularly using these halophytes as primary investigative lens. In this study, by analyzing differences organ soil ecological stoichiometry well salt accumulation characteristics three ( Phragmites communis , Suaeda salsa Tamarix chinensis ) Yellow River Delta, we revealed ion enrichment capacity clarified adaptive saline Our results indicated that S. accumulated more Na + Mg 2+ while P. maintained low content its surrounding soil. The C:N ratios negatively correlated with most ions, T. displayed positive correlation ions. demonstrated highest but least homeostasis, whereas showed superior homeostasis. We hypothesize might have experienced faster growth rate during study period, ' topsoil appears be conducive for growth. tolerance strategies plants influenced demonstrating greater adaptability modifications higher potential land management. These insights enhance our understanding their contribution improving quality soils Delta.

Language: Английский

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Effects of groundwater depth on ecological stoichiometric characteristics of assimilated branches and soil of two desert plants

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: Aug. 8, 2023

Groundwater plays a crucial role in regulating plant growth arid regions and has significant effects on physiological mechanisms. However, research the influence of groundwater change ecological stoichiometry is still limited. Therefore, this study was carried out to obtain variations assimilated branches soil two dominant species Gurbantunggut Desert ( Haloxylon ammodendron persicum ) at different depths reveal responses desert plants depth changes. The results showed that (1) H. branches’ stress tolerance indicators (C:N, C:P) are higher, while nutritional (N:P) lower. nutrient richer. (2) varied significantly along gradient. With deepening groundwater, C, N P increased, variation element ratio inconsistent. Most properties inversely proportional groundwater. (3) vital environmental factor affecting stoichiometry. Soil also had accumulation branches. (4) Regulating allocation an adaptation cope with local hydrological conditions These findings provide novel insights into within fragile ecosystems may have implications for implementation effective measures related stability sustainability ecosystems.

Language: Английский

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Effects of increased precipitation on C, N and P stoichiometry at different growth stages of a cold desert annual

Global Ecology and Conservation, Journal Year: 2022, Volume and Issue: 37, P. e02158 - e02158

Published: May 17, 2022

Plant C, N and P can reflect plant strategies of nutrient utilization allocation. Precipitation is a key factor affecting uptake especially in arid semiarid regions, it predicted to increase the cold deserts Northwest China due climate change. However, balance stoichiometry annual plants at different growth stages response increased precipitation not known. Thus, we performed an experiment on grass Eremopyrum distans Gurbantunggut Desert determine effect allocation stages. In control, organ C concentration was relatively stable during life cycle, but leaf root vegetative stage; culm decreased then with growth. Increased significantly C:N C:P ratios stage, N:P lower than 14 whole stage. could improve resorption efficiency cope reproduction allocation, nutrients are more sensitive precipitation. These results indicate that absorption for reproductive E. distans, system plays crucially important role influence under varied environment.

Language: Английский

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Stoichiometric Characteristics of Abies georgei var. smithii Plants in Southeast Tibet

Sustainability, Journal Year: 2023, Volume and Issue: 15(11), P. 8458 - 8458

Published: May 23, 2023

In order to elucidate the adaptation mechanisms of stoichiometric characteristics Abies georgei var. smithii in southeastern Tibet different habitats, spatial and temporal dynamics nutrient contents ratios among leaf, branch, stem, root organs were analyzed on Sejila Mountain at elevations (3500 m, 3900 4300 m). The results show that (1) C K fir did not change significantly with increasing elevation same season, while N P showed an overall trend elevation, being highest leaves. distribution was leaves > branches roots stem; content each organ stem. (2) At seasons, a similar convergence terms storage utilization strategies, more nutrients optimally allocated between assimilated stored alpine which represents “trade-off” strategy. (3) Compared findings global-scale studies, this study area has low N, P, contents, its growth is limited by both P. Due physiological balance constraints, N-limited elements plants relatively stable, line “limiting element stability hypothesis”. (4) Principal component analysis influence environmental factors had scale effect, demonstrated increased accumulation when subjected stress, promoted domestication plant, enabling it good capacity strategies even high elevation; thus, become pioneer tree species elevations. This research work shows resilient smithiir led differences uptake use efficiency patterns altitudinal gradients, adapting habitat changes adjusting strategy habitats.

Language: Английский

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