Nitrogen loading enhances phosphorus limitation in terrestrial ecosystems with implications for soil carbon cycling

Functional Ecology, Journal Year: 2022, Volume and Issue: 36(11), P. 2845 - 2858

Published: Sept. 10, 2022

Abstract Increased human‐derived nitrogen (N) loading in terrestrial ecosystems has caused widespread ecosystem‐level phosphorus (P) limitation. In response, plants and soil micro‐organisms adopt a series of P‐acquisition strategies to offset N loading‐induced P Many these impose costs on carbon (C) allocation by micro‐organisms; however, it remains unclear how affect C cycling. Herein, we review the literature effects limitation outline conceptual overview plant microbial may organic (SOC) stabilization decomposition ecosystems. Excessive input significantly enhances biomass production, acidification, produces litterfall with high N/P ratios, which can aggravate Long‐term cause alter their functional traits increase acquisition. Plants release carboxylate exudates phosphatases, modify root morphological traits, facilitate formation symbiotic associations mycorrhizal fungi stimulate abundance P‐mineralizing P‐solubilizing micro‐organisms. Releasing phosphatases could accelerate SOC decomposition, whereas changing (e.g. an fine length) contribute higher stabilization. relative abundances bacteria mining decay, decrease use efficiency subsequently lower sequestration. The trade‐offs between different under should be among future research priorities due cascading impacts storage. Quantifying ecosystem thresholds for adaption increased is important because are effective when below threshold. Moreover, understanding response at levels native availability provide insight divergent across sites Altogether, explicitly considered Earth System Models generate more realistic predictions Read free Plain Language Summary this article Journal blog.

Language: Английский

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Increasing pesticide diversity impairs soil microbial functions

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(2)

Published: Jan. 9, 2025

Pesticide application is essential for stabilizing agricultural production. However, the effects of increasing pesticide diversity on soil microbial functions remain unclear, particularly under varying nitrogen (N) fertilizer management practices. In this study, we investigated stochasticity microbes and multitrophic networks through amplicon sequencing, assessed community related to carbon (C), N, phosphorus (P), sulfur (S) cycling, characterized dominant bacterial life history strategies via metagenomics along a gradient two N addition levels. Our findings show that higher enriches abundance specialists opportunists capable degrading or resisting pesticides, reducing proportion generalists in absence addition. These shifts can complicate networks. Under increased diversity, selective pressure may drive bacteria streamline their average genome size conserve energy while enhancing C, P, S metabolic capacities, thus accelerating nutrient loss. comparison, was found reduce niche differentiation at mitigating impacts network complexity functional traits associated with ultimately alleviating results reveal contrasting different input scenarios emphasize strategic mitigate ecological use systems.

Language: Английский

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Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral‐bound soil phosphorus in grasslands

Ecology, Journal Year: 2021, Volume and Issue: 103(3)

Published: Dec. 19, 2021

Phosphorus (P) limitation is expected to increase due nitrogen (N)-induced terrestrial eutrophication, although most soils contain large P pools immobilized in minerals (Pi ) and organic matter (Po ). Here we assessed whether transformations of these could plant available alleviating under enhanced N availability. The mechanisms underlying possible were explored by combining results from a 10-year field addition experiment 3700-km transect covering wide ranges soil pH, N, aridity, leaching, weathering that affect status grasslands. Nitrogen promoted the dissolution immobile Pi (mainly Ca-bound recalcitrant P) more forms (including Al- Fe-bound fractions Olsen decreasing pH 7.6 4.7, but did not Po . Soil total declined 10% 385 ± 6.8 346 9.5 mg kg-1 , whereas increased 546% 3.5 0.3 22.6 2.4 after addition, associated with an mobilization, uptake, leaching. Similar experiment, drop 7.5 5.6 concentration along grassland ratio between relatively mobile Our provide new mechanistic understanding important role mobilization maintaining supply accelerating biogeochemical cycles anthropogenic enrichment. This process temporarily buffers ecosystem or even causes will extensively deplete long run.

Language: Английский

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Consequences of 33 Years of Plastic Film Mulching and Nitrogen Fertilization on Maize Growth and Soil Quality

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(25), P. 9174 - 9183

Published: June 13, 2023

Plastic film mulching and urea nitrogen fertilization are widely used in agricultural ecosystems, but both their long-term use may leave a negative legacy on crop growth, due to deleterious effects of plastic microplastic accumulation acidification soil, respectively. Here, we stopped covering soil with an experimental site that was previously covered for 33 years compared properties subsequent maize growth yield between plots were never the film. Soil moisture about 5–16% higher at mulched plot than never-mulched plot, NO3– content lower former when fertilization. Maize generally similar plots. had earlier dough stage (6–10 days) Although did add substantial amounts residues into soils, it not net (given positive practice first place) quality yield, least as initial effect our experiment. Long-term resulted pH decrease 1 unit, which bring temporary P deficiency occurring early stages growth. Our data information this important form pollution systems.

Language: Английский

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Effects of combined application of nitrogen, phosphorus, and potassium fertilizers on tea (Camellia sinensis) growth and fungal community

Applied Soil Ecology, Journal Year: 2022, Volume and Issue: 181, P. 104661 - 104661

Published: Sept. 13, 2022

Language: Английский

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Linking soil depth to aridity effects on soil microbial community composition, diversity and resource limitation

CATENA, Journal Year: 2023, Volume and Issue: 232, P. 107393 - 107393

Published: July 24, 2023

Language: Английский

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Elevational variation in soil phosphorus pools and controlling factors in alpine areas of Southwest China

Geoderma, Journal Year: 2023, Volume and Issue: 431, P. 116361 - 116361

Published: Feb. 2, 2023

As an important life element in the Earth's ecosystem, soil phosphorus (P) is of great significance to stability and sustainable development terrestrial ecosystems. However, seasonal variations different P pools their regulatory mechanisms along elevations are not fully understood. Here, we investigated including total (TP), available (AP), inorganic (IP), organic (OP), labile P, moderately stable topsoil (0–15 cm) (2600–3900 m) Yulong Snow Mountain. The associated drivers leaf nutrient contents, properties, micro-climate, microbial parameters were also examined. We found that all fractions reached a maximum at mid-elevations (2,900 m 3,200 m), possibly due more active microorganisms suitable climatic conditions for advancing weathering. Meanwhile, AP pool was observed be tightly related content elevations. Unexpectedly, most did show changes, except showing significantly higher level wet season than dry season, owing high temperature activity promoting release season. Consequently, acid phosphatase dissolved carbon had stronger influence on other factors. Moreover, there strong interaction with environments (i.e. moisture, temperature, carbon). Collectively, our results revealed elevational shifts potential Mountain, provided theoretical basis dynamics response mountain

Language: Английский

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Phosphorus/nitrogen sensing and signaling in diverse root–fungus symbioses

Trends in Microbiology, Journal Year: 2023, Volume and Issue: 32(2), P. 200 - 215

Published: Sept. 8, 2023

Establishing mutualistic relationships between plants and fungi is crucial for overcoming nutrient deficiencies in plants. This review highlights the intricate sensing uptake mechanisms used by response to phosphate nitrogen starvation, as well their interactions with plant immunity. The coordination of transport systems both host fungal partners ensures efficient assimilation, contributing long-term maintenance these associations. It also essential understand distinct responses external levels forms, they significantly impact outcomes symbiotic interactions. Our importance evolutionarily younger newly discovered root–fungus associations, such endophytic which offer potential benefits improving nutrition. Mechanistic insights into complex dynamics phosphorus within diverse associations can facilitate identification molecular targets engineering developing phenotypes enhanced use efficiency. Ultimately, this knowledge inform tailored fertilizer management practices optimize

Language: Английский

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

Journal of Ecology, Journal Year: 2023, Volume and Issue: 111(7), P. 1545 - 1560

Published: May 25, 2023

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

Language: Английский

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Extraradical hyphae alleviate nitrogen deposition‐induced phosphorus deficiency in ectomycorrhiza‐dominated forests

New Phytologist, Journal Year: 2023, Volume and Issue: 239(5), P. 1651 - 1664

Published: June 15, 2023

Summary The continuous imbalance between nitrogen (N) and phosphorus (P) deposition is expected to shift many ecosystems from N‐ P limitation. Extraradical hyphae of ectomycorrhizal (ECM) fungi play important roles in plant nutrient acquisition under deficiency. However, whether how ECM enhance soil availability alleviate N‐induced deficiency remains unclear. We investigated the impacts on transformations among different fractions underlying mechanisms N two ECM‐dominated forests. Ectomycorrhizal enhanced addition by stimulating mineralization organic (Po) desorption solubilization secondary mineral P, as indicated increase positive hyphal effect plant‐available pool negative effects Po pools. Moreover, increased phosphatase activity abundance microbial genes associated with inorganic solubilization, while decreasing concentrations Fe/Al oxides. Our results suggest that can forests regulating interactions abiotic factors involved transformations. This advances our understanding acclimation strategies via mediating plant–mycorrhiza sustain forest production functional stability changing environments.

Language: Английский

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