Whole-soil-profile warming does not change microbial carbon use efficiency in surface and deep soils

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(32)

Published: July 31, 2023

The paucity of investigations carbon (C) dynamics through the soil profile with warming makes it challenging to evaluate terrestrial C feedback climate change. Soil microbes are important engines driving biogeochemical cycles; their use efficiency (CUE), defined as proportion metabolized organic allocated microbial biomass, is a key regulator controlling fate C. It has been theorized that CUE should decline warming; however, empirical evidence for this response scarce, and data from deeper soils particularly scarce. Here, based on samples whole-soil-profile experiment (0 1 m, +4 °C)

Language: Английский

---

Distinct patterns of soil bacterial and fungal community assemblages in subtropical forest ecosystems under warming

Global Change Biology, Journal Year: 2022, Volume and Issue: 29(6), P. 1501 - 1513

Published: Nov. 30, 2022

Climate change globally affects soil microbial community assembly across ecosystems. However, little is known about the impact of warming on structure communities or underlying mechanisms that shape composition in subtropical forest To address this gap, we utilized natural variation temperature via an altitudinal gradient to simulate ecosystem warming. After 6 years, co-occurrence network complexity increased with warming, and changes their taxonomic were asynchronous, likely due contrasting processes. We found while stochastic processes drivers bacterial composition, led a shift from deterministic dry season. Structural equation modelling highlighted water content positively influenced during season negatively wet These results facilitate our understanding response climate may improve predictions function microbes forests.

Language: Английский

---

Seasonal dynamics of soil microbial growth, respiration, biomass, and carbon use efficiency in temperate soils

Geoderma, Journal Year: 2023, Volume and Issue: 440, P. 116693 - 116693

Published: Nov. 6, 2023

Soil microbial growth, respiration, and carbon (C) use efficiency (CUE) are essential parameters to understand, describe model the soil cycle. While seasonal dynamics of respiration well studied, little is known about how growth CUE change over course a year, especially outside plant growing season. In this study, we measured gross via 18O incorporation into DNA, biomass in an agricultural field deciduous forest 16 times two years. We sampled soils depth 5 cm from plots at which harvest residues or leaf litter remained on plot was removed. observed strong variations biomass. All these were significantly higher site, contained 4.3 % organic C compared site with 0.9 C. also varied strongly (0.1 0.7) but overall site. found that lesser extent followed temperature. Microbial further affected by presence plants system foliage forest. At low temperatures winter, both showed lowest rates, whereas (calculated growth) amongst highest values determined during years, due temperature sensitivity respiration. increased winter. Surprisingly, winter peak not connected high increase DNA content. This suggests microorganisms accumulated N, potentially form osmo- cryoprotectants cell size did divide. bloom following decline, where released freely available, might constitute highly dynamic time annual cycle temperate systems. Highly variable CUE, our fact calculated independently controlled ask for great caution when used physiology, sequestration. Instead, should be investigated individually combination better understand

Language: Английский

---

Agricultural limitations to soil carbon sequestration: Plant growth, microbial activity, and carbon stabilization

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 367, P. 108986 - 108986

Published: March 20, 2024

Soil carbon (C) sequestration is an important process for mitigating climate change while improving soil productivity. At the same time, it presents challenges nutrient availability and changing agricultural practices. The aim of this study was to survey limitations found on pioneering farms testing C using a Finnish network farmers farming A combination satellite monitoring, on-site measurements analysis used quantify evaluate physical, chemical, biological quality indicators plant productivity 20 (40 fields). were assessed through conceptual model, classifying them into three stages growth, microbial activity or stabilization. Based results, there are in all stages: growth constrained by crop choices which limit leaf area sunlight capture, processing limited poor structure moisture stress, stabilization waterlogging sulfur deficiency. These problems be widespread, but not present farms. Bringing levels best performing could reduce considerable gap between potential that achieved practice.

Language: Английский

---

Vertical Stratification Reduces Microbial Network Complexity and Disrupts Nitrogen Balance in Seasonally Frozen Ground at Qinghai Lake in Tibet

Microorganisms, Journal Year: 2025, Volume and Issue: 13(2), P. 459 - 459

Published: Feb. 19, 2025

Global climate change has accelerated the reduction of permafrost regions across different altitude gradients, shortening duration freezing period to varying extents. However, response soil microorganisms frozen soils along gradients remains unclear. In this study, we employed 16S rRNA sequencing and LC-MS metabolomics investigate microbial communities metabolites vertical stratification in Qinghai Lake region. The results indicated that Proteobacteria, Firmicutes, Actinobacteria were key bacterial phyla during period, with Proteobacteria Firmicutes showing significant sensitivity (p < 0.05). majority physicochemical factors exhibited a trend initially increasing then decreasing altitude, whereas pH showed opposite trend. moisture content identified as most important environmental influencing community structure. Deterministic processes dominated assembly basin. Co-occurrence network analysis led higher average degree network, while reducing complexity inter-species connectivity. Soil revealed altered metabolic profiles 27 metabolites, significantly changed primarily associated carbohydrate amino acid metabolism. conclusion, characteristics regulated by regional stratification, which further influenced structure characteristics, thereby altering carbon nitrogen stocks. Specifically, altitudes more favorable for retention stocks

Language: Английский

---

Metagenomics reveals the response of antibiotic resistance genes to elevated temperature in the Yellow River

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 859, P. 160324 - 160324

Published: Nov. 19, 2022

Language: Английский

---

Responses of soil microbial carbon use efficiency to warming: Review and prospects

Soil Ecology Letters, Journal Year: 2022, Volume and Issue: 4(4), P. 307 - 318

Published: April 6, 2022

Language: Английский

---

Autochthonous sources and biogeochemical processes drive the spatiotemporal variation of DOM composition and optical indicators in a karst river

Journal of Hydrology, Journal Year: 2023, Volume and Issue: 623, P. 129825 - 129825

Published: June 16, 2023

Language: Английский

---

Effects of grazing on soil respiration in global grassland ecosystems

Soil and Tillage Research, Journal Year: 2024, Volume and Issue: 238, P. 106033 - 106033

Published: Feb. 7, 2024

Language: Английский

---

An evaluation model for in-situ bioremediation technology of petroleum hydrocarbon contaminated soil

Environmental Pollution, Journal Year: 2024, Volume and Issue: 344, P. 123299 - 123299

Published: Jan. 5, 2024

Language: Английский

---