Intrinsic microbial temperature sensitivity and soil organic carbon decomposition in response to climate change

Global Change Biology, Год журнала: 2024, Номер 30(6)

Опубликована: Июнь 1, 2024

Abstract Soil microbes are essential for regulating carbon stocks under climate change. However, the uncertainty surrounding how microbial temperature responses control losses warming conditions highlights a significant gap in our change models. To address this issue, we conducted fine‐scale analysis of soil organic composition different gradients and characterized corresponding growth physiology across various paddy soils spanning 4000 km China. Our results showed that altered matter, resulting reduction carbohydrates approximately 0.026% to 0.030% from humid subtropical regions continental regions. These changes were attributed decrease proportion cold‐preferring bacteria, leading losses. findings suggest intrinsic sensitivity plays crucial role determining rate decomposition, providing insights into limitations faced by activities their impact on carbon‐climate feedback.

Язык: Английский

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The underappreciated roles of aboveground vertebrates on belowground communities

Trends in Ecology & Evolution, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Annual and seasonal variability in tundra vole ( Microtus oeconomus ) diet in northern Alaska

Arctic Antarctic and Alpine Research, Год журнала: 2025, Номер 57(1)

Опубликована: Фев. 7, 2025

Within arctic ecosystems, rodents (voles and lemmings) influence plant community composition, soil nutrient availability, carbon cycling through foraging the deposition of waste. Yet, little is known about how rodent diet may vary seasonally annually, particularly with fluctuations in population density. Here, we characterize composition tundra voles (Microtus oeconomus) northern Alaska using stable isotope analysis fecal hair samples collected over a seven-year period, including full "boom bust" cycle. Results from Bayesian mixing models both suggest that predominately feed on rhizomatous sedges Eriophorum vaginatum Carex bigelowii throughout summer. However, consumption shifts rhizomes early summer to tillers buds late Tundra vole diets were broadly similar year cycle, although dietary niche breadth increased abundance. These findings selective behavior provide insight into plant–animal interactions Alaskan tundra, which be disrupted under climate change or by other disturbance regimes.

Язык: Английский

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Agricultural soil microbiomes at the climate frontier: Nutrient-mediated adaptation strategies for sustainable farming

Ecotoxicology and Environmental Safety, Год журнала: 2025, Номер 295, С. 118161 - 118161

Опубликована: Апрель 1, 2025

The equilibrium transformation of soil microbial community dynamics and succession across various temporal spatial dimensions plays a critical role in maintaining plant adaptability. Intensive agricultural practices accelerate the communities, rendering their restoration function more vulnerable. Climate change, with its variable impacts, affects resilience communities through regulatory mediating effects. Investigating spatiotemporal context climate change offers valuable insights into developing robust resilient ecosystems. This review examines resources interactive effects on resource regulation, prediction structures allocation. Additionally, it explores mechanisms that sustain ecological systems, emphasizing application profit-averaging law.

Язык: Английский

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Soil fauna impacts on carbon cycling in managed grasslands: A review

Advances in agronomy, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Quantifying the utilisation of blue, green and brown resources by riparian predators: A combined use of amino acid isotopes and fatty acids

Methods in Ecology and Evolution, Год журнала: 2024, Номер 15(8), С. 1450 - 1462

Опубликована: Июнь 24, 2024

Abstract Global change drives multiple facets of biodiversity including interaction diversity, which is fundamental for ecosystem functioning. However, studying trophic interactions challenging in meta‐ecosystems, that ecosystems connected by spatial flows energy, materials and organisms across boundaries. While analytical methods based on abundances polyunsaturated fatty acids (PUFAs) stable isotopes amino (AAs) are being increasingly used, it has never been explored if both approaches could be: (i) combined mixing models to enhance precision dietary inference (ii) compared disentangle transfers various PUFAs proteins food webs the wild. We explore utility PUFA AA resolve resource a natural riparian web. focus spiders their potential prey from blue, green brown sources address three important persisting methodological issues food‐web ecology, namely whether essential carbon can protein origin resources, relative abundance be model provide higher estimates (i.e. narrower intervals) (iii) combining two unveil coupling webs. Our research demonstrates power distinguish green, transfer up consumers. show provides overall similar individual but significantly increases precision. In addition, we showcase how transfers. For instance, most less concentrated predators, proteins, highlighting uncoupling along chains. first time effectiveness abundances, particularly relevant complex meta‐ecosystem context. study illustrates PUFAs, necessity approaches.

Язык: Английский

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The Interaction between Climate Change and Biodiversity Can Be Assessed from a Material Cycle Perspective

Diversity, Год журнала: 2024, Номер 16(8), С. 506 - 506

Опубликована: Авг. 19, 2024

This study focused on understanding biodiversity variability in response to climate change as an environmental stressor from a carbon cycle perspective. As the frequency and magnitude of stresses are expected increase due rising concentrations, these changes may affect biodiversity. However, several studies have argued that conventional methods for assessment, primarily based arithmetic indices utilized national policies, inadequate accurately assessing interactions among species, abiotic changes, material cycling. Here, we indicate stressors occur at various scales domains, macroscopic microscopic, their effects ecosystems multi-dimensional. Furthermore, not only organisms inhabiting but organisms, return, influence through life history resulting stresses. The results our review suggest processes sequentially interconnected, forming self-reinforcing feedback loops. Ultimately, integrated approach is necessary understand complex open ecosystems. should be capable comprehending overall flow by considering ecosystem characteristics.

Язык: Английский

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Microbial abundances and carbon use under ambient temperature or experimental warming in a southern boreal peatland

Biogeochemistry, Год журнала: 2024, Номер 167(5), С. 631 - 650

Опубликована: Март 24, 2024

Abstract Organic peat soils occupy relatively little of the global land surface area but store vast amounts soil carbon in northern latitudes where climate is warming at a rapid pace. Warming may result strong positive feedbacks loss and change driven by microbial processes if alters balance between primary productivity decomposition. To elucidate effects on communities mediating dynamics, we explored abundance broad groups their source (i.e. old versus more recently fixed photosynthate) using lipid analysis (δ 13 C PLFA) samples under ambient temperatures before/after initiation experimental (+ 2.25, + 4.5, 6.75, 9 °C). This occurred over profile to 2 m depth an undrained, ombrotrophic bog Minnesota. We found that total biomass individual indicator abundances were stratified strongly correlated temperature conditions. However, warming, statistically significant community sporadic inconsistent. For example, 3 months after relative Gram-negative bacterial indicators across combined > 50 cm Gram-positive 20–50 showed relationships temperature. At same timepoint, however, Actinobacterial negative relationship After 10 fungal biomarkers was positively related all depths combined, absolute anaerobic bacteria declined with increasing interval. The lack observed response broader suggest least initially, structure these peatlands bulk density water content than Alternatively, simply represent lag period, come future. long-term trajectory this ecosystem then could either be direct, initial time, or indirect through other physical biogeochemical changes profile. These results provide important baseline against which measure carbon-cycling responses elevated CO .

Язык: Английский

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Combining mathematical models and machine learning algorithms to predict the future regional-scale actual transpiration by maize

Agricultural Water Management, Год журнала: 2024, Номер 303, С. 109056 - 109056

Опубликована: Сен. 9, 2024

Язык: Английский

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Highlighting the role of biota in feedback loops from tundra ecosystems to the atmosphere

Frontiers in Environmental Science, Год журнала: 2024, Номер 12

Опубликована: Дек. 20, 2024

The rapid climatic and environmental changes observed in the Arctic across globe general call for reliable model projections. In recent years our understanding of ongoing future through ecosystem modelling has increased tremendously. Yet, most models do not consider many feedback loops at play natural ecosystems. Particularly those influenced by biota, beyond vegetation to some extent microbes, are often neglected. As a first step towards better integration biotic influences into models, we provide broad overview various ways biota may influence between high-latitude biosphere atmosphere. We focus specifically on three key tundra atmosphere (carbon dynamics, albedo permafrost thaw) compartments (vegetation, decomposers herbivores) these. multifaceted appear patchy both space time. However, still important roles modulating loops, including these dynamics magnitude, accuracy credibility projections likely improve.

Язык: Английский

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