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Slower Soil Nitrogen Transformations Under Longer‐Term Warming and the Consequences for Plant GrowthNARA Subscribed
Climate warming is expected to stimulate soil nitrogen (N) transformations, thereby increasing the supply of available N to support plant growth and carbon (C) assimilation. However, it remains uncertain whether this stimulatory effect on soil N transformations can persist over time to sustain plant growth and N uptake. This study combines a global meta‐analysis with a local warming experiment with 7 years to shed light on how...
Soil Bacterial β‐Diversity as a Key Determinant of Belowground Productivity in Warming Alpine EcosystemsNARA Subscribed
Climate warming has profound effects on terrestrial ecosystems, with biodiversity playing a crucial role in modulating ecosystem productivity responses. While extensive studies have investigated how plant species richness (α‐diversity) influences aboveground productivity under warming conditions, the contributions of plant and soil microbial β‐diversity to belowground net primary productivity (BNPP) remain poorly understood. I...
Methane (CH 4 ) uptake in alpine ecosystems is an important component of the global CH 4 sink. However, large uncertainties remain regarding the magnitude and spatial patterns of CH 4 uptake, owing to its extensive spatial variability, diverse controlling factors, and limited regional‐scale observations. Here, we investigated field ecosystem CH 4 uptake along a 3200‐km transect across various alpine grasslands on the Qinghai–T...
Aridity threshold for alpine soil nitrogen isotope signature and ecosystem nitrogen cyclingNARA Subscribed
Determination of tipping points in nitrogen (N) isotope (δ 15 N) natural abundance, especially soil δ 15 N, with increasing aridity, is critical for estimating N‐cycling dynamics and N limitation in terrestrial ecosystems. However, whether there are linear or nonlinear responses of soil δ 15 N to increases in aridity and if these responses correspond well with soil N cycling remains largely unknown. In this study, we investiga...
The responses of soil nitrogen (N) transformations to climate change are crucial for biome productivity prediction under global change. However, little is known about the responses of soil gross N transformation rates to drought gradient. Along an aridity gradient across the 2700 km transect of drylands on the Qinghai‐Tibetan Plateau, this study measured three main soil gross N transformation rates in both topsoil (0–10 cm) an...
Dryness weakens the positive effects of plant and fungal β diversities on above‐ and belowground biomassNARA Subscribed
Plant and microbial diversity are key to determine ecosystem functioning. Despite the well‐known role of local‐scale α diversity in affecting vegetation biomass, the effects of community heterogeneity (β diversity) of plants and soil microbes on above‐ and belowground biomass (AGB and BGB) across contrasting environments still remain unclear. Here, we conducted a dryness‐gradient transect survey over 3000 km across grasslands...
Pronounced nongrowing season warming and changes in soil freeze–thaw (F–T) cycles can dramatically alter net methane (CH 4 ) exchange rates between soils and the atmosphere. However, the magnitudes and drivers of warming impacts on CH 4 uptake in different stages of the F–T cycle are poorly understood in cold alpine ecosystems, which have been found to be a net sink of atmospheric CH 4 . Here, we reported a year‐round ecosyste...
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