To understand the alterations in neighborhood stability and its driving factors, phytoplankton and environmental variables were examined at 11 test web sites in Huaxi River, a tributary regarding the Three Gorges Reservoir, in spring, summertime, autumn, and winter. More over, the resource use efficiency (RUEPP), phytoplankton richness (S), phytoplankton evenness (J), and community turnover (BC) were additionally determined. Outcomes indicated that a total of 8 phyla, including 103 genera and 380 types, were identified in Huaxi River over summer and winter. Among them, 264 types had been collected in springtime, 181 in summer, 197 in autumn, and 183 in winter. How many Chlorophyta ended up being the biggest, accompanied by Bacillariophyta, Euglenophyta, and Cyanophyta. The amount of types and cell density in S0 web site were the littlest, while those in S2 site were the biggest. The RUEPP ended up being fluctuated in four seasons, utilizing the maximum during the summer in addition to minimal in autumn. BC ended up being dramatically adversely correlated with RUEPP, phytoplankton richness, complete phosphorus (TP), orthophosphate (PO43–P), complete nitrogen (TN), nitrate (NO3–N), permanganate index, and conductivity (Spc); but, it had been dramatically favorably correlated with phytoplankton evenness and dissolved air (DO). These outcomes declare that Salinosporamide A mw liquid degree regulation within the Three Gorges Reservoir has actually a substantial effect on the dwelling of phytoplankton community in Huaxi River, which leads into the uncertainty of phytoplankton neighborhood and simple replacement, while the amount of community turnover is affected by the connected effect of biological and abiotic factors.To increase crops yields, using huge amounts of fertilizers is becoming more and more typical in agricultural regions, causing NO3–N groundwater air pollution. Agricultural non-point pollution is the primary supply of groundwater NO3–N air pollution. To make certain drinking tap water protection and quality, it is very important to clarify the types of NO3–N pollution in farming regions. In this study, 35 sampling internet sites had been randomly selected into the Qingdao agricultural location last year and 2019. The spatial distribution of NO3–N concentration was reviewed by the inverse distance weighting strategy (IDW). The nitrogen and oxygen isotopes were used as something to locate resources of NO3–N while the SIAR model was used to quantify contribution Digital PCR Systems percentage of air pollution resources. The outcomes indicated that the focus of NO3–N (average) in groundwater in Qingdao has been decreased from 38.49 mg·L-1 in ’09 to 22.37 mg·L-1 in 2019, however it is nevertheless greater than the most allowable concentration of NO3–N in drinking water set by the World Health business (whom). The NO3–N concentration gradually increased from south to north in both 2009 and 2019. The mix drawing of δ15N-NO3- and δ18O-NO3- tv show that the primary types of NO3–N in groundwater in Qingdao are chemical fertilizers, soil nitrogen, and manure and sewage. Liquid isotopes indicate that precipitation was the key source of groundwater in Qingdao. The SIAR model results suggested that the share of each resource rated as followsmanure and sewage (47.42%) > soil nitrogen (27.80%) > chemical fertilizer (14.32%) > atmospheric nitrogen depositions (10.43%). From 2009 to 2019, the standard of groundwater in Qingdao is enhanced, but NO3–N pollution still can’t be ignored. According to the results, avoidance and control should be designed to make sure the protection health care associated infections of drinking water therefore the sustainable development of agriculture.The interface between Shengjin Lake and Yangtze River ended up being selected since the research area. The water chemical structure and hydrogen and oxygen isotope values of different kinds of water systems had been tested, and their regular variation attributes had been analyzed to explore the sources of substance ions within the surface and groundwater. Eventually, the share of combined water sources to compound ions in groundwater had been predicted. The results show the following ① The concentration of chemical ions when you look at the area and groundwater associated with research area is more than compared to atmospheric precipitation, together with actual and chemical parameters display regular difference. ② Surface water primarily belongs to the Ca-HCO3 kind, but the percentage of the Ca-SO4 enter summertime is somewhat lower than that in various other seasons; Groundwater primarily belongs to Ca-HCO3 and Ca-SO4 kinds, with proportions of 46% and 27%, correspondingly, as well as the regular distinction is certainly not significant. ③ Ca2+ and Mg2+ in the surface and groundwater mainly originate from the dissolution of carbonate rocks, carbonic acid and sulfate ions take part in the dissolving means of carbonate nutrients. Na+and Cl- are partially derived from atmospheric precipitation and partly sourced from farming fertilization and manure sewage. ④ Mixed water sources is also an important source of chemical ions in groundwater, with all the typical contribution 28% to Cl-, showing a seasonal trend.In the present study, the spatio-temporal distribution characteristics of heavy metals (Cd, Hg, As, Pb, Cr, Cu, Ni, and Zn) in earth around 19 centralized drinking water sources in Wuhan had been investigated.