Enhancing phosphorus source apportionment in watersheds through species-specific analysis

Water Research, Journal Year: 2024, Volume and Issue: 253, P. 121262 - 121262

Published: Feb. 7, 2024

Language: Английский

---

Adsorption and recovery of phosphate using sodium carbonate as co-precipitant synthesized La&Zr dual-metal modified material: Adsorption mechanism and practical application

Chemosphere, Journal Year: 2024, Volume and Issue: 363, P. 142878 - 142878

Published: July 18, 2024

Language: Английский

---

Microbial eukaryote community succession over hundreds of years in Chinese lakes

Ecological Indicators, Journal Year: 2024, Volume and Issue: 158, P. 111512 - 111512

Published: Jan. 1, 2024

Microbial eukaryotes play critical roles in maintaining the health and stability of lake ecosystems. Consequently, investigating spatial temporal evolution microbial eukaryotic community structures associated environmental drivers can inform water ecology studies protection efforts. In this study, sediment core samples were collected from Lakes Chaohu, Erhai, Lugu Fuxian China to reconstruct succession using DNA profiling methods. Mantel tests used identify key factors influencing explore mechanisms underlying ecological network changes. Statistical analyses revealed that diversity Chaohu Erhai shifted 2000s 1980s, respectively, while communities did not exhibit significant changes during study period, which may be due oligotrophic state these two lakes. Ciliophora Chlorophyta primary taxa four lakes with overall relative abundances 27.2 % 22.3 %, respectively. The diversities significantly correlated nutrient enrichment meteorological factors. Lastly, niche gap gradually overlapped after shifts Lake biased interactions strengthened. Overall, reveals impacts long-term human activities climate change on ecosystems multiple perspectives structure, network, findings will contribute integrate indicators freshwater monitoring future.

Language: Английский

---

Research progress of simultaneous nitrogen and phosphorus removal adsorbents in wastewater treatment

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(6), P. 114844 - 114844

Published: Nov. 17, 2024

Language: Английский

---

Multi-scale impacts of human activity intensity on water quality in nine plateau lake basins in Yunnan Province

Journal of Lake Sciences, Journal Year: 2024, Volume and Issue: 36(2), P. 430 - 442

Published: Jan. 1, 2024

人类活动强度的空间异质性是理解区域人地关系和生态环境效应的基础。基于云南九大高原湖泊流域2020年土地利用数据,构建不同景观类型的人类影响强度系数,运用GIS空间分析量化流域人类活动强度与空间分异,探讨人类活动强度对水质的影响。结果表明:人类活动强度总体特征由高到低依次是杞麓湖(4.83)、星云湖(4.71)、滇池(4.19)、阳宗海(4.11)、抚仙湖(4.03)、异龙湖(4.01)、程海(3.93)、洱海(3.88)和泸沽湖(2.96)。人类活动强度指数(HAI)在流域尺度、坝区尺度、湖岸尺度的空间分异特征明显,每个流域都受到高强度人类活动影响,最大值出现在坝区,滇池、杞麓湖岸线存在完全开发的区域。人类活动强度随海拔和坡度增高而下降,高强度区集中在地势低平的湖泊周围。湖泊营养状态指数与流域尺度和坝区尺度高强度区呈显著正相关,这些区域应作为景观优化和管理的重点;与岸线尺度低强度区呈显著负相关,有必要减少湖滨带人类活动。综合考虑流域地形地貌-人类活动强度-水质的级联效应,应从不同空间尺度对各景观要素与过程管控。鉴于人类活动强度对水质的影响,可把湖泊管理分为预防型、保护型、治理型。;The spatial heterogeneity of human activity is fundamental for understanding regional human-land relations and its ecological environmental effects. Utilizing 2020 land-use data from nine plateau lake basins in Yunnan Province, we developed impact intensity coefficients varying landscape types. Employing GIS analysis, this study quantified the activities basins, studied effect on water quality. The identified a descending order intensity(HAI) lakes as follows: Lake Qilu (4.83), Xingyun (4.71), Dianchi (4.19), Yangzonghai (4.11), Fuxian (4.03), Yilong (4.01), Chenghai (3.93), Erhai (3.88) Lugu (2.96). discernible variation was observed at three scales: watershed, flat area, lakeshore. Each basin influenced by strong activity, maximum values occurred area. A portion lakeshore fully HAI decreased with increasing elevation slope, high-intensity areas were concentrated around low land basin. significant positive correlation between scale watershed area trophic state index lakes, thus it should be key optimization management future. Lakeshore low-intensity occupancy negative correlation, there need to reduce activities. Considering cascade topography geomorphology - activities-water quality, control each element process carried out different scales. According effects various can classified into preventive type, protective type treatment their management.

Language: Английский

---

Physicochemical Properties and Environmental Effects of Suspended Sediment Particles in the Largest Freshwater Lake, China

Sustainability, Journal Year: 2023, Volume and Issue: 15(8), P. 6888 - 6888

Published: April 19, 2023

Suspended sediment particles (SSPs) act as a potential source of and sink for aquatic pollution. This study sampled six sites in Poyang Lake August November 2019. Changes the physicochemical properties SSPs were analyzed using scanning electron microscope energy-dispersive spectrometry (SEM-EDS). The results showed that consisted mainly clay chalk, with an average content 39.71% 57.52%, respectively. particle size distribution area ranged from 5.54 to 15.97 μm spatial pattern north lake (I) > west (II) east (III). angle (K) morphological indicators varied widely, coefficients variation between 0.25 1.23. Water-flow velocity was negatively correlated SSP size, while suspended-solid concentration positively surface roughness. Morphological parameters, chemical composition, correlation each form identify characteristics. Linear regression equations estimated endogenous phosphorus load zones I, II, III 1027.202 mg/kg, 1265.343 1013.111 mg/kg Therefore, we conclude differences particulate matter, interaction fractions, aqueous environment affecting fugitive forms, may contribute These are essential revealing intrinsic relationship eutrophication studying other water–sediment interface processes pollutants.

Language: Английский

---

Quantifying the functional genes of C, N, P, and S cycling in a deep lake: Depth patterns and drivers

Ecological Indicators, Journal Year: 2024, Volume and Issue: 166, P. 112532 - 112532

Published: Aug. 27, 2024

Microbial functional composition is important for biogeochemical cycles, and usually constrained by taxonomic species pool natural environmental gradients. However, the distribution of genes in deep lakes driving factors remains elusive. Here, we quantified abundance 71 relevant to carbon degradation, fixation, methane metabolism, nitrogen cycling, phosphorus sulfur cycling 38 sediments along water depth ranging from 0 90 m Lugu Lake, China, using Quantitative Ecology Chip (QMEC) then explored their water-depth diversity pattern abiotic biotic drivers. Functional gene showed a hump-shaped peaked at around 50 which low boundary thermocline layer. There were specific preferences among subgroups such as preferring deeper shallow waters, respectively. The dissimilarity total increased with distance indicating distance-decay relationship. was congruence between showing positive correlations compositions bacteria or archaea. This phenomenon consistently observed six subgroups, strength highest while lowest cycling. Compared factors, more composition. Biotic explained 28.5 % variance diversity, other sediment 4.2 3.8 %, For composition, accounted 25.2 variance, whereas contributed 0.7 4.4 Among all explanatory variables function genes, bacterial had contribution, further supported its direct effects 1.45 0.86 on study first time microbial provided comprehensive understanding dynamics communities within aquatic ecosystems.

Language: Английский

---

Blocking endogenous phosphorus release in sediments by a hydrotalcite mixture synthesized with natural sepiolite and discarded cans

Applied Clay Science, Journal Year: 2024, Volume and Issue: 261, P. 107599 - 107599

Published: Oct. 17, 2024

Language: Английский

---