Genetic diversity and phylogenetic diversity reflect the evolutionary potential and history of species, respectively. However, the levels and spatial patterns of genetic and phylogenetic diversity of wildlife at the r...
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Genetic diversity and phylogenetic diversity reflect the evolutionary potential and history of species, respectively. However, the levels and spatial patterns of genetic and phylogenetic diversity of wildlife at the regional scale have largely remained unclear. Here, we performed meta-analyses of genetic diversity in Chinese terrestrial vertebrates based on three genetic markers and investigated their phylogenetic diversity based on a dated phylogenetic tree of 2461 species. We detected strong positive spatial correlations among mitochondrial DNA-based genetic diversity, phylogenetic diversity, and species richness. Moreover, the terrestrial vertebrates harbored higher genetic and phylogenetic diversity in South China and Southwest China than in other regions. Last, climatic factors (precipitation and temperature) had significant positive effects while altitude and human population density had significant negative impacts on levels of mitochondrial DNA-based genetic diversity in most cases. Our findings will help guide national-level genetic diversity conservation plans and a post-2020 biodiversity conservation framework.
In this paper, Ca2MgSi2O7: Bi3+, Eu3+ thermometric phosphors with dual-emitting centers were favorably designed. Phosphors were created by the approach of solid phase in high temperature condition. The inner phase str...
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In this paper, Ca2MgSi2O7: Bi3+, Eu3+ thermometric phosphors with dual-emitting centers were favorably designed. Phosphors were created by the approach of solid phase in high temperature condition. The inner phase structure and photoluminescence characteristics were investigated. The approaches of characterization including X-ray diffractometry, SEM, EDS mapping, ultraviolet-visible diffuse reflectance spectroscopy, as well as fluorescence spectrometry were applied. The influence of temperature on the photoluminescence characteristics of Ca2MgSi2O7: Bi3+, Eu3+ phosphors was systematically researched. The intensity ratio of P-3(1)-> S-1(0) purple luminescence of Bi3+ and D-5(0)-> F-7(2) red luminescence of Eu3+ is dependent on the temperature, which provides a method of optical sensing thermometry. Under the UV excitation of 287 nm, the maximum relative sensitivity (S-r) of this Ca2MgSi2O7: Bi3+, Eu3+ phosphor is 0.66%K-1 (at 533 K) and absolute sensitivity (S-a) gets to 0.0086 K-1 (at 573 K). The experimental phenomena were explained by the thermal-quenching mechanism. The garnered results provide an idea for the future development of luminescence intensity ratio (LIR) technology sensing materials on the basis of Ca2MgSi2O7.
Responses of Hypnum plumaeforme, Thuidium cymbifolium, and Plagiomnium cuspidatum to short-term (96 h) BDE-47 and BDE-209(0, 0.005, 0.05, 0.5, and 5 mu M, respectively) stress were investigated. Both BDE-47 and BDE-20...
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Responses of Hypnum plumaeforme, Thuidium cymbifolium, and Plagiomnium cuspidatum to short-term (96 h) BDE-47 and BDE-209(0, 0.005, 0.05, 0.5, and 5 mu M, respectively) stress were investigated. Both BDE-47 and BDE-209 increased the lipid peroxidation in the three moss species, malondialdehyde (MDA) content increased with the elevated concentration of contaminants, and followed the order: P. cuspidatum > H. plumaeforme > T. cymbifolium on exposure to different concentrations. BDE-47 and BDE-209 stimulated the superoxide dismutase (SOD) and peroxidase (POD) activity of the three moss species, indicating that they played an important role in preventing oxidative stress. Reactive oxygen species (ROS) accumulation was positively correlated with the level of contaminants. The response of anti-oxidative enzymes to BDE-47 and BDE-209 stress differed among the three species. At 5 mu M BDE-47 and BDE-209 treatment, the chlorophyll content of T. cymbifolium was even a little higher than the control group. Proline played an important role for the scavenging of ROS in P. cuspidatum and T. cymbifolium. In summary, BDE-47 was more toxic to the three moss species than BDE-209. P. cuspidatum was the most sensitive and T. cymbifolium was the most tolerant species to BDE-47 and BDE-209 stress. The strong resistance and tolerance of T. cymbifolium, combined with sensitive/moderate anti-oxidative response could elucidate its potential use as bio-indicator in the ecological risk assessment of BDE-47 and BDE-209 contamination.
SARS-CoV-2 infects not only humans but also animals, posing reverse zoonotic risks. As SARS-CoV-2 rapidly evolves, JN.1 has become dominant globally. In this study, we determined the susceptibility of XBB.1.16, EG.5.1...
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Due to the persistence of polycyclic aromatic hydrocarbons (PAHs) in the environment and their well-documented carcinogenic, teratogenic, and mutagenic properties, the removal of PAHs from contaminated soils has garne...
Due to the persistence of polycyclic aromatic hydrocarbons (PAHs) in the environment and their well-documented carcinogenic, teratogenic, and mutagenic properties, the removal of PAHs from contaminated soils has garnered significant worldwide attention. Recently, the catalytic of chlorine dioxide (ClO 2 ) for PAHs removal from contaminated soil has been emerging as an innovative approach. In this study, a ClO 2 /MnO 2 catalytic oxidation system was explored for efficient removal of PAHs from industrial soils. With an optimized ClO 2 /MnO 2 molar ration of 16:1, the removal rate of PAHs was enhanced 29.09% after 0.5 h reaction compared to the ClO 2 -alone system when using a ClO 2 concentration of 2500 mg kg -1 . The kinetics of PAHs degradation in the ClO 2 /MnO 2 system were comprehensively analyzed. A systematic investigation was conducted to evaluate the effects of initial MnO 2 dosage, ClO 2 concentration, and pH value on the degradation process. X-ray photoelectron spectroscopy (XPS), quenching experiments, along with electron paramagnetic resonance (EPR) spectrometer revealed that Mn 3+ , •OH, and HClO collectively contributed to the synergistic indirect oxidation of PAHs. The representative PAH congeners were identified through product analysis, and degradation pathways were proposed. A quantitative-structure-activity-relationship (QSAR) model for 16 PAHs indicated that frontier orbitals and Fukui indices were the key intrinsic influencing factors governing PAHs reactivity. Biological toxicity assessments demonstrated that the ClO 2 /MnO 2 -treated group exhibited significantly reduced luminosity compared to the ClO 2 -alone group, suggesting lower ecotoxicological risks. This work provided a novel, efficient, and cost-effective strategy for PAHs remediation in industrial contaminated soils through catalytic ClO 2 oxidation technology.
To reverse the accelerating degradation of biodiversity and ecosystem services(‘nature’) and climate [1,2], the Convention on Biological Diversity (CBD)and the UN Framework Convention on Climate Change (UNFCCC) will...
To reverse the accelerating degradation of biodiversity and ecosystem services(‘nature’) and climate [1,2], the Convention on Biological Diversity (CBD)and the UN Framework Convention on Climate Change (UNFCCC) will hold major meetings in 2021. We argue that, as a critical priority, countries need to design and implement integrated national strategies to achieve the goals of the three Rio Conventions (including the UN Convention to Combat Desertification—UNCCD) using spatially explicit analyses and policies. This integration can maximize co-benefits and help manage trade-offs to meet the Sustainable Development Goals(SDGs). Nature-based solutions (NBS)provide an important framework for such integration.
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