Soil Biology and Biochemistry, Год журнала: 2025, Номер unknown, С. 109740 - 109740
Опубликована: Фев. 1, 2025
Язык: Английский
Global Change Biology, Год журнала: 2025, Номер 31(1)
Опубликована: Янв. 1, 2025
Soil microorganisms transform plant-derived C (carbon) into particulate organic (POC) and mineral-associated (MAOC) pools. While microbial carbon use efficiency (CUE) is widely recognized in current biogeochemical models as a key predictor of soil (SOC) storage, large-scale empirical evidence limited. In this study, we proposed experimentally tested two predictors POC MAOC pool formation: necromass (using amino sugars proxy) CUE (by 18O-H2O approach). sampling (0-10 10-20 cm depth) was conducted along climatic transect 900 km on the Loess Plateau, including cropland, grassland, shrubland, forest ecosystems, to ensure homogeneous parent material. We found highest accumulation occurred zones MAT between 5°C 10°C or MAP 300 500 mm. Microbial more positively related than (p < 0.05), suggesting that residues may improve strongly compared pool. Random linear regression analyses showed increased with fungal C, whereas bacterial drove MAOC. coupled 0.05) but decoupled SOC > 0.05). The have faster turnover rate due lack clay protection, which lead rapid thus their decoupling from CUE. sense, driven by necromass, explains dynamics. Our findings highlight insufficiency relying solely predict bulk storage. Instead, propose should be used together explain dynamics, each influencing distinct
Язык: Английский
Процитировано
4
Global Change Biology, Год журнала: 2023, Номер 30(1)
Опубликована: Дек. 9, 2023
Abstract Mineral‐associated soil organic matter (MAOM) is the largest, slowest cycling pool of carbon (C) in terrestrial biosphere. MAOM primarily derived from plant and microbial sources, yet relative contributions these two sources to remain unresolved. Resolving this issue essential for managing modeling responses environmental change. Microbial biomarkers, particularly amino sugars, are primary method used estimate versus MAOM, despite systematic biases associated with estimates. There a clear need independent lines evidence help determine importance MAOM. Here, we synthesized 288 datasets C/N ratios particulate (POM), biomass across soils forests, grasslands, croplands. source residues that form whereas POM direct precursor We then stoichiometric approach—based on two‐pool, isotope‐mixing models—to proportional contribution residue (POM) pool. Depending assumptions underlying our approach, inputs accounted between 34% 47% pool, contributed 53%–66%. Our results therefore challenge existing hypothesis dominant constituents conclude biogeochemical theory models should account multiple pathways formation, required resolve where when formation.
Язык: Английский
Процитировано
37
Soil Biology and Biochemistry, Год журнала: 2023, Номер 186, С. 109186 - 109186
Опубликована: Сен. 29, 2023
Язык: Английский
Процитировано
33
CATENA, Год журнала: 2024, Номер 241, С. 108051 - 108051
Опубликована: Апрель 21, 2024
Язык: Английский
Процитировано
12
Soil and Tillage Research, Год журнала: 2024, Номер 241, С. 106108 - 106108
Опубликована: Апрель 4, 2024
Язык: Английский
Процитировано
11
The Science of The Total Environment, Год журнала: 2024, Номер 927, С. 172191 - 172191
Опубликована: Апрель 6, 2024
Язык: Английский
Процитировано
11
Global Change Biology, Год журнала: 2024, Номер 30(6)
Опубликована: Июнь 1, 2024
Abstract Microbial necromass carbon (MNC) accounts for a large fraction of soil organic (SOC) in terrestrial ecosystems. Yet our understanding the fate this pool under long‐term warming is uncertain. Here, we show that 14 years (+4°C) temperate forest resulted reduction MNC by 11% (0–10 cm) and 33% (10–20 cm). Warming caused decrease content due to decline microbial biomass reduced use efficiency. This was primarily warming‐induced limitations available phosphorus, which, turn, constrained production biomass. Conversely, increased activity extracellular enzymes, specifically N ‐acetylglucosaminidase leucine aminopeptidase, which accelerated decomposition MNC. These findings collectively demonstrate decoupling formation underlie observed loss climate warming, could affect SOC ecosystems more widespread.
Язык: Английский
Процитировано
11
Waste Management, Год журнала: 2024, Номер 175, С. 254 - 264
Опубликована: Янв. 20, 2024
Язык: Английский
Процитировано
10
Frontiers in Microbiology, Год журнала: 2024, Номер 15
Опубликована: Март 27, 2024
Introduction By implementing small-scale and efficient fertilization techniques, it is possible to enhance the activity of microorganisms, thereby improving soil carbon sequestration ecological value in agriculture. Methods In this study, field experiments were conducted using various types fertilizers: organic fertilizer, microbial fungal composite an unfertilized control (CK). Additionally, different dosages compound fertilizers applied, including 0.5 times fertilizers, constant 1.5 CK. Using advanced technologies such as Illumina MiSeq high-throughput sequencing, PICRUSt2 prediction, Anosim analysis, redundancy canonical correlation matrix, (SOC) content components, bacterial diversity, metabolic functions, interaction mechanisms examined fields. Results Discussion The results showed pronounced effects modes on SOC community, particularly topsoil layer (0–20 cm). Organic fertilizer treatments increased richness diversity communities soil. However, conventional doses excessive application reduced content. led increase easily oxidizable (EOC) contents. Interestingly, relationship between components bacteria exhibited inconsistency. EOC was positively correlated with index. Chloroflexi a negative both its components. influence metabolismon primary functions more notable. It included seven tertiary functional pathways significantly ( p < 0.05). Purpose Significance These findings understanding relative abundance communities, those related cycle, by adjusting agricultural patterns. This adjustment serves reference for enhancing sinks reducing emissions soils.
Язык: Английский
Процитировано
10
Nature Communications, Год журнала: 2024, Номер 15(1)
Опубликована: Апрель 18, 2024
Abstract Trait-based frameworks are promising tools to understand the functional consequences of community shifts in response environmental change. The applicability these soil microbes is limited by a lack trait data and focus on categorical traits. To address this gap for an important group microorganisms, we identify trade-offs underlying fungal economics spectrum based large collection 28 saprobic isolates, derived from common grassland grown culture plates. In dataset, ecologically relevant variation best captured three-dimensional space. primary explanatory axis represents dense-fast continuum, resembling dominant life-history other taxa. A second significant reflects mycelial flexibility, third one carbon acquisition All three axes correlate with traits involved cycling. Since stress tolerance fundamental niche gradients primarily related 2nd (carbon-use efficiency) especially 3rd (decomposition) orthogonal independent tested stressors. These findings suggest space which can now be at broader scales.
Язык: Английский
Процитировано
10