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Transfer Connection System for Fault Carried out Rotating Machines With Little Info.
e ecological removal of sulfonamide and enrofloxacin in water, which gave a new idea for the development of environmental removal technology for new antibiotic pollutants in water.To explore how C/N ratio-induced changes in the predominant microbial succession in the composting microbiota affect C and N losses, and promote the formation of humic substance, a composting experiment was conducted with C/N ratio of 201, 251 and 301. Results showed that N and C losses under 301 and 251 treatments were 33.5%, 18.9% and 23.6%, 10.8% lower than those of the treatment of 201, respectively. Redundancy analysis results suggested that higher C/N ratio promoted nitrogen fixing bacteria, while inhibited the proliferation of denitrifying bacte-ria, resulting in reduction of the losses of C and N during composting. Higher C/N ratio significantly promoted the growth and reproduction of lignocellulose degrading bacteria for the degradation of fulvic acid and humin to form more humic acid, and improved the polymerization of humic substance. Therefore, C/N ratio could significantly affect key microbes during composting, with consequences on the process and quality. PI3K inhibitor It could be an effective way to regulate C and N losses, promote HS formation, and eventually improve the compost quality and reduce the secondary environmental pollution during composting.To understand the effects of heavy metal pollution derived from atmospheric dust fall on bacterial community structure under different types of biological soil crusts near mining area, we measured the diversity, community composition, and relative abundance of bacteria communities in three different developmental stages of biological soil crusts (BSCs), including algae (ZB), mixed (HB), and moss (TB) crusts, and control (CK, bare soil) around a typical thermal power plant in Ningdong Energy Industrial Base, using the high-throughput sequencing technique. Environmental factors affecting the bacterial community structure were further investigated. The results showed that there were significant differences in physicochemical properties and heavy metal contents among different BSCs. The BSCs were heavily polluted due to the enrichment of heavy metals from atmospheric dust fall. Among the top ten dominant bacterial phyla, Gemmatimonadetes and Cyanobacteria were significantly distinct among different BSCs. Bacteriad that pH, heavy metals, and nutrients were the key factors affecting soil bacteria community composition. The succession of BSCs would improve their physicochemical properties and significantly impacted bacterial community composition. Long term heavy metals enrichment would affect bacterial diversity and community composition of BSCs.Soil samples were collected at the fallow period, flowering stage, and fruiting stage of tomato under tomato-melon (TM) and tomato-bean (TB) systems. Illumina MiSeq high-throughput pyrosequencing was performed to analyze the differences in AM fungal community between the two rotation systems. We further analyzed the key factors driving the changes in AM fungal diversity and community composition. Results showed that rotation with legume significantly altered the α-diversity of AM fungi. Shannon diversity and Pielou evenness of AM fungi under the TB system were 24.9% and 24.0% lower than that under TM system, respectively. Compared to the fallow period, richness, Shannon diversity, and phylogenetic diversity of AM fungi at the tomato flowering and fruiting stages decreased significantly by 55.6%-67.5%, 49.6%-51.5%, and 21.4%-23.7%, respectively. Rotation with legume (the TB system) promoted the relative abundance of Glomus in all the three sampling times, but reduced the relative abundance of Paraglomus and Archaeospora at the flowering and fruiting stages. Claroideoglomus was more abundant in soils under the TM system than that under the TB system at the fallow period, but the pattern was the opposite at the flowering stage. Ambispora, Diversispora, and Scutellospora were detected only in soil under the TB system. Results of permutational multivariate analysis of variance (PERMANOVA) and non-metric multidimensional scaling (NMDS) analysis showed that both rotation system and growing stage significantly affected the structure of AM fungal community. Soil moisture, pH, and Olsen-P were the predominant factors controlling the variations in the diversity and composition of AM fungal community. Results of structural equation modeling (SEM) further indicated that rotation system and growing stage affected the variations in AM fungal diversity and community structure indirectly via changing soil pH.We explored the responses of the quantity and quality of soil dissolved organic matter (DOM) to short-term nitrogen (N) addition across an addition gradient (0, 40, and 80 kg N·hm-2·a-1) and their correlation with bacterial communities in Pinus taiwanensis forest in the Daiyunshan Nature Reserve, Fujian, China. Soil DOM and bacterial community composition were measured using three-dimensional fluorescence and parallel factor analyses combined with high-throughput sequencing. The results showed that compared with the control, N-addition reduced the content of dissolved organic carbon (DOC) and the humification index (HIX) of DOM in the 0-10 and 10-20 cm soil layers, with significant reduction under the high N addition (80 kg N·hm-2·a-1). Results of parallel factor analysis further showed that the relative content of humus-like components (C1, C2) in DOM decreased following N addition. Short-term N addition reduced the relative abundance of copiotrophic bacteria (Proteobacteria and Acidimicrobiia), but increased the relative abundance of oligotrophic bacteria (Spartobacteria). The relative abundance of copiotrophic bacteria were positively correlated with the HIX and refractory humus-like components (C1, C2) and negatively correlated with the relatively easily decomposed fulvic acid-like component (C3), whereas the pattern was opposite for oligotrophic bacteria. It is indicated that bacterial communities with different life strategies had obvious preference for difficult- and easy-to-decompose components in DOM under N addition treatments. We speculated that the transformation of soil microbial life strategies under the background of increasing N deposition might alter DOM components.This study amined to explore the variation of soil organic nitrogen components across the degradation succession of Gahai Wetland. By combining field sampling and laboratory analysis, the content and distribution characteristics of soil organic nitrogen components, i.e., hydrolytic total nitrogen (HTN), unidentified acidolytic nitrogen (HUN), ammonium nitrogen (AMN), amino acid nitrogen (AAN) and acid amino sugar nitrogen (ASN) were investigated in undegraded (UD), lightly degraded (LD), moderately degraded (MD), and heavy degraded (HD) Gahai Wetland. The results showed that, in the 0-10 cm layer, the contents of total nitrogen (TN), HUN, AMN, and AAN in LD decreased by 17.3%, 19.4%, 8.6%, and -5.6%, 28.0%, 19.4%, 17.1% and 0 in MD, and 35.8%, 28.8%, 28.6% and 55.6% in HD, respectively. In the 10-20 cm layer, the four components decreased by 4.0%, 10.3%, 2.9% and 9.1% in LD, 21.0%, 18.3%, -2.9% and -9.1% in MD, and 9.9%, 38.9%, 21.2% and 51.4% in HD, respectively. The corresponding contents in the 20-40 cm soil layer did not change. The proportion of soil acid-hydrolyzed nitrogen components to TN under four degradation stages was HUN (25.9%-32.5%) > AMN (6.7%-11.1%) > AAN (4.8%-11.1%) > ASN (1.2%-4.4%). Soil water content was the main driving factor for variations of soil organic nitrogen components as indicated by the results of redundancy analysis. Degradation of the Gahai Wetland significantly reduced the content of soil TN and the components of acid-hydrolyzed nitrogen in 0-10 cm soil layer, and weakened the nitrogen "sink" function of soils. The AAN and ASN were sensitive to wetland degradation.The health of marine ecological environment is a key factor restricting the development of marine economy. It is important to scientifically and systematically assess the overall ecological health of coastal marine. Based on the newly constructed "dual-core" assessment framework, which takes the state of marine ecosystem as the inner-core and the human socio-economic index as the outer-core, the health status of Yantai coastal marine environment was comprehensively assessed with the survey data from 2008 to 2016. The results showed that the inner-core elements for Yantai coastal area were mainly rated as "excellent" or "good" level. Generally, the sediment quality was the best, while water environment quality was slightly poor. The status of biological community was the core factor determining final rating. For the outer-core assessment, Yantai coastal areas scored 0.98, based on the output value of marine industrial and area of marine reserves. The final "dual-core" assessment result for Yantai offshore area was "excellent/good + 0.98", which indicated that the healthy status of ecological environment of Yantai offshore area was still good, in spite of high degree of development and utilization, but some areas had begun to deteriorate, which needed to be paid special attention in the further developing of marine industry. Our results following the "dual core" framework could provide guidance for the management and decision-making related marine resources development and environmental protection, and is of great significance to realize sustainable utilization of marine resources and environment.Better understanding of the changes in high-temperature would be helpful for improving the monitoring of hot extremes and mitigating their impacts towards a sustainable regional development. Based on the data of daily maximum temperature, relative humidity, and wind speed from 23 meteorological stations in Liaoning Province in summer (June to August) during 1961 to 2019, we analyzed the variations of daily maximum temperature (Tx), daily maximum apparent temperature (AT), and heat wave events (3 consecutive days ≥35 ℃). The effects of meteorological variables on daily maximum apparent temperature were examined by the grey relational analysis method. The results showed that the average Tx (AT) of all stations was 26.19 (27.35), 28.29 (31.13), and 28.14 (31.08) ℃, respectively, while the average trends in Tx (AT) was 0.17 (0.38), 0.20 (0.35), and 0.17 (0.28) ℃·(10 a)-1, respectively, in June, July and August during 1961 to 2019. The average AT and its trends in each month were larger than the Tx. From June to Aosest relationship with Tx. Therefore, the importance of relative humidity on the monitoring and forecasting of high temperature and hot weather cannot be ignored.Based on the meteorological data of 143 meteorological site, we calculated aridity index (AI) with the potential evaporation formulated by FAO-56 Penman-Monteith and precipitation in Northwest China during 1989-2019. Mann-Kendall trend analysis, wavelet analysis and partial differential equation were used to examine the AI change trend, variation cycle, and contribution rate of main climate impact factors to AI. The results showed that there was a non-significant decreasing trend of AI in Northwest China on the whole, a significant decreasing trend of AI in Qinghai, and a non-significant increasing trend of AI in Xinjiang during 1989-2019. There was an abrupt change of AI in the study area in 2010. There was a primary 17-year periodicity in the change of AI in Northwest China. The spatial distribution of AI was shown as a larger AI in the middle of Northwest China and a smaller AI in the Southeast and Northwest in Northwest China. The tendency rates of AI were -1.27, -1.17·(10 a)-1, -0.41, -0.49, -1.77 and -2.
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