Long‐term nitrogen deposition inhibits soil priming effects by enhancing phosphorus limitation in a subtropical forest

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(14), P. 4081 - 4093

Published: April 25, 2023

It is widely accepted that phosphorus (P) limits microbial metabolic processes and thus soil organic carbon (SOC) decomposition in tropical forests. Global change factors like elevated atmospheric nitrogen (N) deposition can enhance P limitation, raising concerns about the fate of SOC. However, how N affects priming effect (PE) (i.e., fresh C inputs induced changes SOC decomposition) forests remains unclear. We incubated soils exposed to 9 years experimental a subtropical evergreen broadleaved forest with two types 13 C-labeled substrates contrasting bioavailability (glucose cellulose) without amendments. found decreased total biomass P, suggesting enhanced limitation. In unamended soils, significantly inhibited PE. contrast, adding increased PE under by larger extent for cellulose (PEcellu ) than glucose (PEglu ). Relative or solely, alleviated suppression C-acquiring enzymes deposition, whereas attenuated stimulation acid phosphatase (AP) deposition. Across treatments, PEglu as enzyme activity increased, PEcellu AP decreased. This suggests inhibits through varying mechanisms depending on substrate bioavailability; is, limitation regulates affecting growth investment acquisition, acquisition. These findings provide new insights impacted loading, expected quality affect long-term regulation

Language: Английский

---

Microbial mechanisms of organic matter mineralization induced by straw in biochar-amended paddy soil

Biochar, Journal Year: 2024, Volume and Issue: 6(1)

Published: March 1, 2024

Abstract Combined straw and straw-derived biochar input is commonly applied by farmland management in low-fertility soils. Although return increases soil organic matter (SOM) contents, it also primes SOM mineralization. The mechanisms which active microorganisms mineralize the underlying factors remain unclear for such To address these issues, paddy was amended with 13 C-labeled straw, without (BC) or ferrihydrite (Fh), incubated 70 days under flooded conditions. Compound-specific C analysis of phospholipid fatty acids ( C-PLFAs) allowed us to identify microbial communities utilizing specific groups involved Cumulative mineralization increased 61% 27% soils Straw + BC Fh BC, respectively, compared that only. total PLFA content independent input. However, C-PLFAs contents 35–82% after addition, reflecting accelerated turnover. Compared those had an altered community composition-increased amounts gram-positive bacteria C-Gram +) fungi, were main mineralizing SOM. Microbial reproduction growth susceptible nutrient availability. C-fungi Olsen P but decreased dissolved carbon $${\text{NO}}_{3}^{ - }$$ NO 3 - contents. In conclusion, acts as electron shuttle, stimulates iron reduction, releases from minerals, turn Gram fungi decomposition response application responsible Graphical

Language: Английский

---

Microbial carbon and phosphorus metabolism regulated by C:N:P stoichiometry stimulates organic carbon accumulation in agricultural soils

Soil and Tillage Research, Journal Year: 2024, Volume and Issue: 242, P. 106152 - 106152

Published: May 14, 2024

Language: Английский

---

Carbon starvation raises capacities in bacterial antibiotic resistance and viral auxiliary carbon metabolism in soils

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(16)

Published: April 10, 2024

Organic carbon availability in soil is crucial for shaping microbial communities, yet, uncertainties persist concerning adaptations to levels and the ensuing ecological evolutionary consequences. We investigated organic metabolism, antibiotic resistance, virus–host interactions soils subjected 40 y of chemical fertilization that led contrasting availability: carbon-poor carbon-rich soils, respectively. Carbon-poor drove enrichment putative genes involved matter decomposition exhibited specialization utilizing complex compounds, reflecting scramble competition. This confers a competitive advantage communities but reduces their buffering capacity terms metabolisms, making them more vulnerable environmental fluctuations. Additionally, viral auxiliary metabolic linked metabolism increased host competitiveness adaptability through strategy akin “piggyback winner.” Furthermore, resistance genes, particularly low-abundance drug categories, were enriched as an consequence warfare (i.e., interference competition). raises concerns about potential dissemination from conventional agriculture relies on chemical-only fertilization. Consequently, starvation resulting long-term increases competition, underscoring importance implementing sustainable agricultural practices mitigate emergence spread antimicrobial increase storage.

Language: Английский

---

Three‐dimensional mapping of carbon, nitrogen, and phosphorus in soil microbial biomass and their stoichiometry at the global scale

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(22), P. 6728 - 6740

Published: Aug. 11, 2022

Soil microbial biomass and stoichiometric ratios are important for understanding carbon nutrient cycling in terrestrial ecosystems. Here, we compiled data from 12245 observations of soil 1626 published studies to map global patterns (MBC), nitrogen (MBN), phosphorus (MBP), their stoichiometry using a random forest model. Concentrations MBC, MBN, MBP were most closely linked organic carbon, while climatic factors ratios. Modeled seasonal MBC concentrations peaked summer tundra boreal forests, but autumn subtropical tropical biomes. The mean MBC/MBN, MBC/MBP, MBN/MBP estimated be 10, 48, 6.7, respectively, at 0-30 cm depth. highest concentrations, stocks, C/N/P found high latitudes probably due the higher matter content, greater fungal abundance, lower availability colder than warmer At 30-100 depth, temperate forests. MBC/MBP ratio showed flexibility scale did MBC/MBN ratio, possibly reflecting physiological adaptations community shifts with latitude. results this study C, N, P scale, as well developing C-cycling models including parameters.

Language: Английский

---

Linking bacterial life strategies with soil organic matter accrual by karst vegetation restoration

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 177, P. 108925 - 108925

Published: Dec. 20, 2022

Language: Английский

---

Biochar significantly reduced nutrient-induced positive priming in a subtropical forest soil

Biology and Fertility of Soils, Journal Year: 2023, Volume and Issue: 59(6), P. 589 - 607

Published: April 17, 2023

Language: Английский

---

Effects of microplastics on carbon release and microbial community in mangrove soil systems

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 465, P. 133152 - 133152

Published: Dec. 1, 2023

Language: Английский

---

Plantations thinning: A meta-analysis of consequences for soil properties and microbial functions

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 877, P. 162894 - 162894

Published: March 21, 2023

Language: Английский

---

Organic fertilization drives shifts in microbiome complexity and keystone taxa increase the resistance of microbial mediated functions to biodiversity loss

Biology and Fertility of Soils, Journal Year: 2023, Volume and Issue: 59(4), P. 441 - 458

Published: March 30, 2023

Language: Английский

---