Soil temperature and fungal diversity jointly modulate soil heterotrophic respiration under short-term warming in the Zoige alpine peatland.

Global warming has changed carbon cycling in terrestrial ecosystems, but it remains unclear how climate warming affects soil heterotrophic respiration (R). We conducted a field experiment in the Zoige alpine peatland to investigate the mechanism of how short-term warming affects R by examining the relationships between plant biomass, soil properties, soil microbial diversity, and functional groups and R. Our results showed that warming increased R after one growing season of warming.

Suppressing Energy Migration via Antiparallel Spin Alignment in One-Dimensional Mn Halide Magnets with High Luminescence Efficiency.

Photoexcited energy migration is prone to causing luminescence quenching in Mn luminescent materials, presenting a formidable challenge for optoelectronic applications. Although various strategies and mechanisms have been proposed to mitigate this issue, the role of spin alignment between adjacent Mn ions has remained largely unexamined. In this study, we have elucidated the influence of spin alignment on energy migration within the one-dimensional Mn-metal halide compound (CH)NMnCl (TMMC) through variable-temperature photoluminescence (PL) and magnetic-optical spectroscopy.

Non-flooding conditions caused by water table drawdown alter microbial network complexity and decrease multifunctionality in alpine wetland soils.

Several soil functions of alpine wetland depend on microbial communities, including carbon storage and nutrient cycling, and soil microbes are highly sensitive to hydrological conditions. Wetland degradation is often accompanied by a decline in water table. With the water table drawdown, the effects of microbial network complexity on various soil functions remain insufficiently understood.

Asynchronous responses of microbial CAZymes genes and the net CO exchange in alpine peatland following 5 years of continuous extreme drought events.

Peatlands act as an important sink of carbon dioxide (CO). Yet, they are highly sensitive to climate change, especially to extreme drought. The changes in the net ecosystem CO exchange (NEE) under extreme drought events, and the driving function of microbial enzymatic genes involved in soil organic matter (SOM) decomposition, are still unclear.

The driving effects of nitrogen deposition on nitrous oxide and associated gene abundances at two water table levels in an alpine peatland.

Alpine peatlands are recognized as a weak or negligible source of nitrous oxide (NO). Anthropogenic activities and climate change resulted in the altered water table (WT) levels and increased nitrogen (N) deposition, which could potentially transition this habitat into a NO emission hotspot. However, the underlying mechanism related with the effects is still uncertain.

Different grassland managements significantly change carbon fluxes in an alpine meadow.

Alpine meadow plays vital roles in regional animal husbandry and the ecological environment. However, different grassland managements affect the structure and function of the alpine meadow. In this study, we selected three typical grassland managements including free grazing, enclosure, and artificial grass planting and conducted a field survey to study the effects of grassland managements on carbon fluxes in an alpine meadow.

The divergent vertical pattern and assembly of soil bacterial and fungal communities in response to short-term warming in an alpine peatland.

Soil microbial communities are crucial in ecosystem-level decomposition and nutrient cycling processes and are sensitive to climate change in peatlands. However, the response of the vertical distribution of microbial communities to warming remains unclear in the alpine peatland. In this study, we examined the effects of warming on the vertical pattern and assembly of soil bacterial and fungal communities across three soil layers (0-10, 10-20, and 20-30 cm) in the Zoige alpine peatland under a warming treatment.

Soil Water Content Shapes Microbial Community Along Gradients of Wetland Degradation on the Tibetan Plateau.

Soil microbes are important components in element cycling and nutrient supply for the development of alpine ecosystems. However, the development of microbial community compositions and networks in the context of alpine wetland degradation is unclear. We applied high-throughput 16S rRNA gene amplicon sequencing to track changes in microbial communities along degradation gradients from typical alpine wetland (W), to wet meadow (WM), to typical meadow (M), to grassland (G), and to desert (D) in the Zoige alpine wetland region on the Tibetan Plateau.

Changes in precipitation regime lead to acceleration of the N cycle and dramatic NO emission.

Alpine meadows on the Qinghai-Tibetan Plateau are sensitive to climate change. The precipitation regime in this region has undergone major changes, "repackaging" precipitation from more frequent, smaller events to less frequent, larger events. Nitrous oxide (NO) is an important indicator of responses to global change in alpine meadow ecosystems.

Plant and Soil Enzyme Activities Regulate CO Efflux in Alpine Peatlands After 5 Years of Simulated Extreme Drought.

Increasing attention has been given to the impact of extreme drought stress on ecosystem ecological processes. Ecosystem respiration (Re) and soil respiration (Rs) play a significant role in the regulation of the carbon (C) balance because they are two of the largest terrestrial C fluxes in the atmosphere. However, the responses of Re and Rs to extreme drought in alpine regions are still unclear, particularly with respect to the driver mechanism in plant and soil extracellular enzyme activities.

Divergent responses of CO and CH fluxes to changes in the precipitation regime on the Tibetan Plateau: Evidence from soil enzyme activities and microbial communities.

Carbon fluxes (CO and CH) are important indicators of the response of alpine meadow ecosystems to global climate change. Alpine meadows on the Qinghai-Tibet Plateau are sensitive to climate change. Although the temporal allocation of precipitation can vary, its intensity is expected to increase, and its frequency is expected to decrease in the future.