Spatial heterogeneity of microbial community structure and its environmental drivers in surface sediments of Erhai Lake.

As a crucial plateau freshwater lake in Yunnan Province, China, Erhai Lake exhibits distinct environmental heterogeneity driven by its unique watershed characteristics and human activities, significantly influencing sediment microbial communities. This study investigated the spatial relationships between environmental factors and microbial community structures in surface sediments from the eastern, western, and northern shores using redundancy analysis (RDA) and Spearman correlation analysis. Results revealed that pH, total nitrogen (TN), total phosphorus (TP), total organic carbon (TOC), and redox potential (Eh) were key drivers of microbial community divergence.

Compound Eye Structure and Phototactic Dimorphism in the Yunnan Pine Shoot Beetle, (Coleoptera: Scolytinae).

, a notorious forest pest in southwest China, primarily employs infochemicals to coordinate mass attacks that overcome host tree defenses. However, secondary visual cues, particularly detection of host color changes, also aid host location. This study characterized the compound eye structure and vision of using electron microscopy and phototaxis tests.

The Gradient Heterogeneity of Deserts Alters the Interaction Relationships Between Xerophytic Plants and Soils.

Desert ecosystems pose extreme challenges to plant survival. This study explores the adaptive strategies of two xerophytic halophytes, and , in Xinjiang's Ebinur Lake wetland, focusing on their plant-soil-microbe (PSM) coupling systems across desert gradients. Results revealed significant interspecific and gradient-dependent differences in plant functional traits: showed high growth plasticity with a fast-growth strategy, while adopted a conservative strategy.

Exogenous Fe(II) enhanced iron plaque formation influences the adsorption and immobilization of Cd in rice root.

Background: Iron plaque on the rice rhizoplane could potentially prevent cadmium (Cd) entry into plant roots. A hydroponic experiment was conducted to study the morphological characteristics and mineral compositions of iron plaque, Cd immobilization mechanism by iron plaque, and its effect on Cd uptake and transport in rice.

Results: Exogenous divalent iron ion (Fe(II)) could induce the formation of deep-red iron plaque on rice rhizoplane, which primarily consisted of ferrihydrite, goethite, hematite, iron phosphate, and iron sulfate compounds.

Citric acid and polyethylene glycol modified Na-cyclodextrin MOFs for efficient antibiotic removal and in-depth investigation of adsorption mechanisms.

Antibiotics in wastewater have a significant threat to human health and ecosystems. Metal-organic frameworks (MOFs) are among the most promising adsorbents for removing antibiotics from wastewater. In the present study, an environmentally friendly sodium-based cyclodextrin metal organic framework (CD-MOF) was synthesized and further modified with citric acid (CA) and polyethylene glycol (PEG) to enhance its water stability and adsorption capacity.

Response of Anammox Process to Chloroacetonitrile and Accelerated Recovery With Pulse Electric Field.

Chloroacetonitrile poses significant challenges to anaerobic ammonium oxidation (anammox) process due to its toxicity. This study evaluated the effects of chloroacetonitrile on anammox and further explored the potential of a 1.5 V and 1000 Hz pulsed electric field (PEF) in mitigating prolonged chloroacetonitrile stress.

Variation in Community Leaf Stoichiometry and Nutrient Resorption Along an Elevational Gradient on the Northern Slope of the Kunlun Mountains.

Leaf stoichiometry and nutrient resorption are key indicators for assessing nutrient-use status and predicting nutrient limitation in plant growth. However, the patterns of variation in plant community nutrient-use traits along elevational gradients remain unclear. To address this, we measured leaf nutrient contents of plant communities across six elevational gradients (1960 to 3548 m) on the northern slope of the Kunlun Mountains.

Seasonal habitat suitability analysis of in the northern Tanggula region of Sanjiang-yuan National Park, China.

is endemic to the Qinghai-Tibet Plateau that possesses both keystone and flagship qualities. The Tangbei Area (north of the Tanggula Mountains) in the Sanjiangyuan National Park is one of the core distribution areas for . Both population size and extinction risk of are concerning for conservation and action is needed.

Canopy gaps disturbance enhances ecosystem multifunctionality by increasing species and phylogenetic diversity in Picea schrenkiana forests.

Canopy gaps, as a common type of natural disturbance in forest ecosystems, drive biodiversity changes via niche differentiation, thereby effecting ecosystem multifunctionality (EMF). However, which dimension of biodiversity (e.g.

How does an external electric field in the normal-direction affect the cyclo[18]carbon molecule?-a DFT study.

This investigation explores the impact of an external electric field (EEF) in the normal-direction on cyclo[18]carbon, scrutinizing changes in molecular conformation, electronic structure, reactivity, and spectroscopic properties. Utilizing Gaussian16 and Multiwfn, we modeled the molecule under EEF conditions. The EEF induced an expansion of the cyclo[18]carbon ring and increased bond lengths.

High-Fidelity Profiling of Multiple Nearby Mutations via Cooperative Recognition.

Detection methods with single-nucleotide specificity are essential tools for nucleic acid analysis in diverse clinical and biological settings. However, both hybridization-based and enzyme-based methods are only effective for discriminating single-nucleotide mutations at certain positions, making it difficult to detect nucleic acid targets having multiple nearby mutations. Herein, we describe the design of cooperative recognition probes (CRPs) that integrate both hybridization and ligation-based recognition mechanisms and thus are highly effective for discriminating mutations throughout all positions.

Phosphorus fraction characteristics and influencing factors of soil aggregates in pure and mixed forests.

Phosphorus components in the soil aggregates of different particle sizes is critical for improving phosphorus availability in north subtropical regions. We investigated two representative stand types, pure stands and the mixed stands of and in Lishui District, Nanjing. We measured soil aggregates from two soil layers (0-20 cm and 20-40 cm) to determine the stability of soil aggregates, labile phosphorus fraction content and the acid phosphatase activity of each particle size, as well as litter biomass and fine root biomass, to analyze the differences of active phosphorus fractions of soil aggregates between different stand types.

Mechanistic and practical insights into tetracycline degradation via 2D/2D N-doped biochar/carbon nitride-driven peroxymonosulfate activation: Toxicity mitigation and product analysis.

In this study, a rationally designed 2D/2D composite from N-doped biochar (NC) and S-doped graphitic carbon nitride (CNS) was developed for efficient peroxymonosulfate (PMS) activation toward tetracycline (TC) degradation. Peanut shell-derived NC produced via urea treatment showed both excellent conductivity and an advantageous 2D structural configuration. The strategic incorporation of NC within the CNS matrix to engineer 2D/2D architectures significantly enhances interfacial contact while establishing efficient electron transport pathways, thereby optimizing charge carrier dynamics through improved mobility and separation efficiency.

Development and characterization of a carboxymethyl cellulose-alginate hybrid superabsorbent hydrogel designed for water management in agriculture.

Water scarcity and inefficient irrigation methods continue to be major issues in agriculture, which consumes 70 % of freshwater. In this context, creating effective water management strategies is crucial, and superabsorbent polymers (SAPs) offer a promising new solution. However, traditional synthetic SAPs and hybrid SAPs with a lot of synthetic material contribute to microplastic pollution, making it urgent to find eco-friendly alternatives that deliver good performance while protecting the environment and supporting sustainability.

Differences in Growth Responses to Climate of Three Conifer Species in Lugu Lake of Northwestern Yunnan, Southwestern China.

Responses of tree radial growth to climate are usually species-specific. Northwestern Yunnan has become a hotspot for the study of dendrochronology due to its sensitivity to climate change and the relative integrity of vegetation preservation. In this paper, we take three dominant conifers-, and -as the research objects and analyze their tree-ring width chronologies in order to reveal the main climate factors affecting tree growth in northwestern Yunnan and to evaluate species-specific variation in climate response.

Soil Microbiome Drives Depth-Specific Priming Effects in Forests Following Labile Carbon Input.

The priming effect (PE), a microbially mediated process, critically regulates the balance between carbon sequestration and mineralization. This study used soils from different soil depths (0-20 cm, 20-40 cm, and 40-60 cm) under forest in the Tianshan Mountains as the research object. An indoor incubation experiment was conducted by adding three concentrations (1% SOC, 2% SOC, and 3% SOC) of C-labelled glucose.

A Review on Comfort of Pedestrian Bridges Under Human-Induced Vibrations and Tuned Mass Damper Control Technologies.

With the development of urban infrastructure construction, while pedestrian bridges meet traffic functions the issue of their comfort has become a core consideration in structural design. This is because the long-span lightweight structures, with their large flexibility and low fundamental frequencies, are also vulnerable to human-induced vibrations. Pedestrian load modellings include the deterministic time-domain model, which is widely adopted in codes due to its simplicity, the random model that takes into account individual variability, and the frequency-domain model.

High-throughput suspect screening of priority hormone-disrupting chemicals in megacity aquatic ecosystems using a domain-specific database framework.

The impact of hormones on ecological environments and human health is a growing concern. However, due to limitations in monitoring technologies and interdisciplinary research, most existing studies have mostly been confined to specific media (e.g.

New perspectives under heterogeneity: mechanism of nutrient heterogeneity on Cd-induced hormesis of soil respiration.

Hormesis is a phenomenon in which low doses of toxins stimulate organisms, while high doses have inhibitory effects. Soil heterogeneity nutrient spatial profoundly influences community structure and stress responses by altering the microenvironment around microorganisms. Studies on hormesis in soil ecosystems have made significant progress, but most of them have overlooked the impact of soil nutrient spatial heterogeneity on hormesis.

Surface-modified polyimide on novel porous ceramic membranes for pervaporation desalination.

Although pervaporation (PV) desalination is a promising solution to global freshwater scarcity, membranes suffer from unstable separation performance. This study utilized resource recycling to prepare a porous ceramic membrane using solid waste fly ash as raw material, which was then combined with polyimide (PI) to produce a high-performance composite membrane (abbreviated to as PI/ceramic membrane). In this composite membrane, the ceramic membrane provides mechanical support and promotes rapid water passage, while the PI layer intercepts hydrated salt ions through size screening and electronic repulsion.

Conversion and migration of iron and nitrogen under co-hydrothermal carbonization of pomelo peel and dyeing sludge.

Dyeing sludge contained a high content of iron, which of conversion and migration during co-hydrothermal carbonization (co-HTC) with biomass inevitably influenced the behaviors of other components and vice versa. In this study, the migration and conversion mechanism of Fe and N in the co-HTC process of Pomelo peel (PP) and dyeing sludge (DS) under conditions of various PP/DS mass ratios at 240 °C was analyzed by a series of characterizations. The nitrogen removal efficiency (NRE) of hydrochar was higher than the calculated value, the N content decreased, and some N migrated from the solid phase to liquid phase, showing a positive synergistic effect.

Research on the synergistic prediction of the suitable distribution and chemical components of Panax Notoginseng under the background of climate warming.

Panax notoginseng is a well-known research species in China. The issue of continuous crop barriers has led to a reduction in suitable habitats in Wenshan. In the context of global warming, it is far from adequate to merely predict the suitability distribution of P.

Colonization Mechanism of Endophytes with Plants and Their Role in Pesticides Degradation.

Endophytes are beneficial microorganisms that reside within plant tissues, playing a vital role in plant growth and stress tolerance. Endophytes successfully colonize host plants by employing a range of mechanisms, including cell wall modification, modulation of phytohormones, secretion of effector proteins, and the production of antioxidants. Certain endophytes can efficiently break down specific pollutants such as pesticides in the rhizosphere, phyllosphere, and endosphere.

Carrier free nano-assembled redox dual-responsive biotin-artesunate conjugate for enhanced tumor therapy.

Artesunate (ART) exhibits anti-tumor activity, however, its clinical application has been hindered due to its insufficient tumor selectivity and undesired toxicity to normal tissues. To improve its tumor selectivity, ART was conjugated with biotin through disulfide bond to produce Bio-SS-ART. The Bio-SS-ART could self-assemble into spherical nanoparticles in aqueous solution with particles size of 158.