7,654 results match your criteria total anthropogenic


Tracking nitrate sources in agricultural-urban watershed using dual stable isotope and Bayesian mixing model approach: Considering N transformation by Lagrangian sampling.

J Environ Manage 2021 Sep 18;300:113693. Epub 2021 Sep 18.

Department of Biology Education, Daegu University, Kyeongsangbuk-do, 38453, Republic of Korea. Electronic address:

A dual isotopes approach and the Bayesian isotope mixing model were applied to trace nitrogen pollution sources and to quantify their relative contribution to river water quality. We focused on two points to enhance the applicability of the method: 1) Direct measurement on the end-members to distinguish "sewage" and "manure" which used to be grouped in one pollution source as their isotope ranges overlap; 2) The Lagrangian sampling method was applied to consider the transport of nitrogen pollutants in a long river so that any fractionation process can be dealt with in the given Bayesian modeling framework. The results of the analysis confirmed the NO isotope composition in the river of interest to be within the range of NO with origins in "NH in fertilizer", "Soil N", and "Manure and sewage" pollution. Read More

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September 2021

Environmental DNA gives comparable results to morphology-based indices of macroinvertebrates in a large-scale ecological assessment.

PLoS One 2021 21;16(9):e0257510. Epub 2021 Sep 21.

Department of Aquatic Ecology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Zurich, Switzerland.

Anthropogenic activities are changing the state of ecosystems worldwide, affecting community composition and often resulting in loss of biodiversity. Rivers are among the most impacted ecosystems. Recording their current state with regular biomonitoring is important to assess the future trajectory of biodiversity. Read More

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September 2021

Changes in the fatty acid composition of pine needle lipids under the aluminum smelter emissions.

Ecotoxicology 2021 Sep 21. Epub 2021 Sep 21.

Laboratory of Ecosystems Bioindication, Siberian Instititue of Plant Physiology and Biochemistry Siberian Branch of the Russian Academy of Sciences, Lermontov str., 132, 664033, Irkutsk, Russia.

Changes in the fatty acid (FA) composition of total lipids of Pinus sylvestris needles at different pollution levels caused by emissions from a large aluminum smelter (BrAS) have been studied. In the needles of trees from unpolluted (background) territories, the FA spectrum is represented by 24 acids with prevalence of unsaturated FAs (71.6%). Read More

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September 2021

Summertime Clean-Background Ozone Concentrations Derived from Ozone Precursor Relationships are Lower than Previous Estimates in the Southeast United States.

Environ Sci Technol 2021 Sep 21. Epub 2021 Sep 21.

School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.

Background ozone in this study is defined as the amount of ozone that is not affected by the emissions of ozone precursors in the region of study and is transported from the distant troposphere or the stratosphere. It is one of the factors that must be considered in regional ozone control strategies. Different methods have been applied to define the background ozone level. Read More

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September 2021

Anthropogenic and environmental determinants of alien plant species spatial distribution on an island scale.

Sci Total Environ 2021 Sep 14;805:150314. Epub 2021 Sep 14.

Biodiversity Conservation Laboratory, Department of Environment, University of the Aegean, 81100 Mytilene, Lesvos, Greece.

Mediterranean islands are considered especially vulnerable to biological invasions by alien plants. However, there is a lack of studies on island scale regarding the factors that determine alien plant's spatial distribution, and the way they affect invasion process. A roadside survey of alien plant species was conducted on Lesvos, the 8th largest island in Mediterranean basin. Read More

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September 2021

Assemblage structure and spatial diversity patterns of kelp forest-associated fishes in Southern Patagonia.

PLoS One 2021 20;16(9):e0257662. Epub 2021 Sep 20.

Pristine Seas, National Geographic Society, Washington, DC, United States of America.

Knowledge of the ecology of the fish fauna associated with kelp (primarily Macrocystis pyrifera) forests in Southern Patagonia is scarce, especially in how abiotic and biotic variables influence their structure, diversity, and distribution. This information is important for the management and conservation of this unique ecosystem, which has minimal anthropogenic impacts at present. We analyzed data from 122 quantitative underwater transects conducted within kelp forests at 61 stations from Chile's southern Patagonian fjords to the Cape Horn and Diego Ramirez archipelagos and the southern tip of Argentina, including the Mitre Peninsula and Isla de los Estados. Read More

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September 2021

Artificial light at night and anthropogenic noise alter the foraging activity and structure of vertebrate communities.

Sci Total Environ 2021 Sep 9;805:150223. Epub 2021 Sep 9.

Department of Biological Sciences, California Polytechnic State University, San Luis Obispo, CA 93407, USA; Communication and Social Behavior Group, Max Planck Institute for Ornithology, 82319 Seewiesen, Germany.

Light and noise pollution from human activity are increasing at a dramatic rate. These sensory stimuli can have a wide range of effects on animal behavior, reproductive success, and physiology. However, less is known about the functional and community-level consequences of these sensory pollutants, especially when they co-occur. Read More

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September 2021

Health impact assessment from exposure to trace metals present in atmospheric PM at Ahmedabad, a big city in western India.

Environ Monit Assess 2021 Sep 19;193(10):663. Epub 2021 Sep 19.

Geosciences Division, Physical Research Laboratory, Ahmedabad, India.

Many toxicological studies revealed the deleterious effects on human health induced by trace metals in ambient particulate matter (PM). This study reports the season-dependent water-soluble and total metal mass in PM collected simultaneously over five microenvironments in a semi-arid urban region, Ahmedabad, located in western India. The mineral dust fraction in PM over Bapunagar, Narol, Paldi, Income Tax, and Science City was estimated to be around 39, 45, 47, 44, and 31% during summer (May-June 2017) and 24, 55, 28, 27, and 28% during winter (December 2017-January 2018), respectively, corroborating mineral dust is perennial in the air over Ahmedabad. Read More

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September 2021

Microplastic and microfiber fluxes in the Seine River: Flood events versus dry periods.

Sci Total Environ 2021 Sep 4;805:150123. Epub 2021 Sep 4.

Leesu, Ecole des Ponts, Univ Paris Est Creteil, Marne-la-Vallee, France.

Studies on the influence of hydrodynamic conditions on anthropogenic microfiber (MF) and microplastic (MP) distributions in freshwater environments are sparse. In this study, we evaluated the influence of urbanisation gradient on the spatial variability of MFs and MPs. Temporal variability was also assessed by comparing the concentrations and fluxes of MFs and MPs under low flow conditions with those during the January-February 2018 flood event. Read More

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September 2021

Determination of anthropogenic organics in dichlomethane extracts of aerosol particulate matter collected from four different locations in China and Republic of Korea by GC-MS and FTICR-MS.

Sci Total Environ 2021 Sep 9;805:150230. Epub 2021 Sep 9.

Department of Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea; Mass Spectrometry Convergence Research Center and Green-Nano Materials Research Center, Daegu 41566, Republic of Korea. Electronic address:

In this study, the hypothesis that particulate matter in east of Korea peninsula would be significantly influenced by particulate matter originated from east of China was evaluated. To test the hypothesis, water-insoluble compounds in particulate matter samples collected from three different locations in Korea and one in China were characterized by atmospheric pressure photoionization (APPI) coupled with Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) and gas chromatography mass spectrometry (GC-MS). Each sample was collected twice, in winter and in spring. Read More

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September 2021

Potency of the pandemic on air quality: An urban resilience perspective.

Sci Total Environ 2021 Sep 10;805:150248. Epub 2021 Sep 10.

College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China.

Since the outbreak of COVID-19 pandemic, the lockdown policy across the globe has brought improved air quality while fighting against the coronavirus. After the closure, urban air quality was subject to emission reduction of air pollutants and rebounded to the previous level after the potency period of recession. Different response patterns exhibit divergent sensitivities of urban resilience in regard to air pollution. Read More

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September 2021

Compositions of sequestrated soil carbon in constructed wetlands of Taiwan.

Sci Total Environ 2021 Sep 11;805:150290. Epub 2021 Sep 11.

Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Taiwan.

Constructed wetlands are an ecological engineering technology that has been widely applied to treat anthropogenic wastewater. Until now, few studies have focused on soil carbon (C) in the constructed treatment wetlands in tropical regions. Therefore, this study provides insight into the changes in soil C composition of tropically constructed wetlands at different ages. Read More

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September 2021

Molecular characterization and spatial distribution of dicarboxylic acids and related compounds in fresh snow in China.

Environ Pollut 2021 Sep 4;291:118114. Epub 2021 Sep 4.

Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin, 300072, China. Electronic address:

Low molecular weight organic compounds are ubiquitous in the atmosphere. However, knowledge on their concentrations and molecular distribution in fresh snow remains limited. Here, twelve fresh snow samples collected at eight sites in China were investigated for dicarboxylic acids and related compounds (DCRCs) including oxocarboxylic acids and α-dicarbonyls. Read More

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September 2021

Hydrochemical appraisal and solute acquisitions in Seti River Basin, Central Himalaya, Nepal.

Environ Monit Assess 2021 Sep 17;193(10):656. Epub 2021 Sep 17.

Central Department of Environmental Science, Tribhuvan University, Kathmandu, Nepal.

The chemical characterization and assessment of the water quality in the headwater areas of the Himalaya are necessary for securing the water in the future. This study aims to assess the hydrochemistry and water quality concerning drinking and irrigational uses in the Seti River Basin (SRB), Nepal. A total of 45 water samples were collected in 2016 from the SRB during pre-monsoon, monsoon, and post-monsoon seasons, and pH, EC, TDS, and DO were measured on-site, whereas Ca, Mg, K, Na, Cl, SO, NO, and dissolved Si were analyzed in the laboratory. Read More

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September 2021

The role of algal blooms and community respiration in controlling the temporal and spatial dynamics of hypoxia and acidification in eutrophic estuaries.

Mar Pollut Bull 2021 Sep 9;172:112908. Epub 2021 Sep 9.

School of Marine and Atmospheric Sciences, Stony Brook University, Southampton, NY 11968, United States of America. Electronic address:

While hypoxia and acidification can be common occurrences in eutrophic coastal zones, the precise, coupled temporal and spatial dynamics of these conditions are poorly described. Here, continuous measurements of water column pH, pCO, carbonate chemistry, and dissolved oxygen (DO) concentrations were made from spring through fall across two, temperate eutrophic estuaries, western Long Island Sound (LIS) and Jamaica Bay, NY, USA. Vertical dynamics were resolved using an underway towing profiler and an automated stationary profiling unit. Read More

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September 2021

Evolution of Atmospheric Total Organic Carbon from Petrochemical Mixtures.

Environ Sci Technol 2021 Sep 16. Epub 2021 Sep 16.

Air Quality Research Division, Environment and Climate Change Canada, Toronto, Ontario M3H 5T4, Canada.

Reactive organic compounds play a central role in the formation of ozone and secondary organic aerosols. The ability to accurately predict their fate, in part, relies upon quantitative knowledge of the chemical and physical parameters associated with the total organic carbon (TOC), which includes both precursors and oxidation products that evolve in the atmosphere over short to long time scales. However, such knowledge, obtained via limited carbon closure experiments, has not been attained for complex anthropogenic emissions. Read More

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September 2021

The challenge of assessing the proper functioning conditions of coastal lagoons to improve their future management.

Sci Total Environ 2021 Sep 1;803:150052. Epub 2021 Sep 1.

CNRS, UMR 6134, SPE, 20250 Corte, France.

The sustainable management of coastal lagoon hydrosystems is a key issue for the socio-economic and environmental development of many coastal areas worldwide. Often maintained by direct or indirect groundwater supplies, they provide a large range of ecosystem services, from which human societies take advantage. Twenty years after its implementation, a large majority of the Mediterranean lagoons have still not reached the "good status" required by the WFD. Read More

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September 2021

Source apportionment and health risk due to PM and TSP at the surface workings of an underground coal mine in the arid desert region of northwestern China.

Sci Total Environ 2021 Sep 2;803:149901. Epub 2021 Sep 2.

School of Soil and Water Conservation, Beijing Forestry University, 100083 Beijing, China.

The surface operations area of an underground coal mine near Lingwu in Ningxia Hui Autonomous Region was selected for this study. Particulate matter (PM) was sampled in the coal screening plant during the day and night in Spring and Winter, 2019. Twelve trace metals and eight water-soluble ions in particulate matter up to 10 μm in diameter (PM) and total suspended particles (TSP) were analyzed using ICP-OES and ion chromatography, respectively. Read More

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September 2021

Stable isotope fractionation of thallium as novel evidence for its geochemical transfer during lead‑zinc smelting activities.

Sci Total Environ 2021 Sep 2;803:150036. Epub 2021 Sep 2.

Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.

Thallium (Tl) is a highly toxic trace metal. Lead (Pb)‑zinc (Zn) smelting, which is a pillar industry in various countries, is regarded as one of the dominant anthropogenic sources of Tl contamination in the environment. In this study, thallium isotope data have been evaluated for raw material and a set of industrial wastes produced at different stages of Pb-Zn smelting in a representative large facility located by the North River, South China, in order to capture Tl isotope signatures of such typical anthropogenic origin for laying the foundation of tracking Tl pollution. Read More

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September 2021

Current pollution status, spatial features, and health risks of legacy and emerging halogenated flame retardants in agricultural soils across China.

Sci Total Environ 2021 Sep 2;803:150043. Epub 2021 Sep 2.

MOE Key Laboratory of Environmental Remediation and Ecosystem Health, Institute of Environmental Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Interdisciplinary Research Academy (IRA), Zhejiang Shuren University, Hangzhou 310015, China. Electronic address:

Soil is a major reservoir and a secondary source of semi-volatile organic chemicals, while studies on the pollution status of halogenated flame retardants (HFRs) in agricultural soils are limited. In this study, a total of twenty-five chemicals including novel brominated flame retardants (NBFRs), polybrominated diphenyl ethers (PBDEs), and dechlorane plus (DPs) was analyzed in the agricultural soils across China to investigate the occurrence, spatial distribution, potential sources, influencing factors and their associated human health risks. The results showed that BDE-209 (125-130,183 pg/g, dry weight, d. Read More

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September 2021

Investigating sources, driving forces and potential health risks of nitrate and fluoride in groundwater of a typical alluvial fan plain.

Sci Total Environ 2021 Aug 27;802:149909. Epub 2021 Aug 27.

Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Science, Shijiazhuang 050061, China.

Groundwater of alluvial fan plains is the foremost water source, especially in arid/semiarid regions. Its contaminants are big issues for water supply and public health concern. To reveal the groundwater chemistry, contaminants sources and health threats in alluvial aquifers, 81 groundwaters were collected from a typical alluvial fan plain of northern China for nitrogen, fluoride and major ions analysis. Read More

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Influence of land use class and configuration on water-sediment partitioning of heavy metals.

Sci Total Environ 2021 Sep 4;804:150116. Epub 2021 Sep 4.

Faculty of Engineering, Queensland University of Technology (QUT), GPO Box 2434, Brisbane 4001, Queensland, Australia. Electronic address:

Influence of land use and population characteristics on solid-liquid partitioning of heavy metals in aquatic ecosystems is little understood. This study hypothesised that the partitioning of heavy metals (Cd, Cr, Cu, Ni, Pb and Zn) between water and sediments is influenced by different land use classes, their configuration patterns including patch density, Shannon's diversity index, largest patch index, and splitting index and population density. Relationships between variables were investigated from different distances to the stream network (sub-catchment and riparian scales) and considering land use patterns within individual land use classes and individual sub-catchments as a whole (class and landscape levels, respectively). Read More

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September 2021

Remarkable signals of the ancient Chinese civilization since the Early Bronze Age in the marine environment.

Sci Total Environ 2021 Sep 8;804:150209. Epub 2021 Sep 8.

Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education of China, College of Marine Geosciences, Ocean University of China, Qingdao 266100, China.

The signals of fire activity induced from climate and ancient human activities could be recorded in sedimentary strata. We examined a 6000-year black‑carbon (BC) record-including char and soot-of a sediment core from the South Yellow Sea. The climate change had a threshold effect on the fire regime, and dominated the char emissions. Read More

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September 2021

Childhood exposure to metal(loid)s in industrial and urban areas along the Persian Gulf using toenail tissue as a biomarker.

Environ Pollut 2021 Sep 1;291:118090. Epub 2021 Sep 1.

Systems Environmental Health and Energy Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran.

Metal(loid)s (MLs) with natural or anthropogenic sources may cause adverse health effects in children. This study aimed to compare the childhood exposure to ΣMLs (essential, non-essential and toxic) in an industrial and an urban area in Southwest Iran using toenail tissue as a biomarker. The present study was carried out with school children in the age range of 7-12 years, who were living in an industrial area in the petrochemical and gas area (PGA) of the Central District of Asaluyeh County and in an urban area (UA) located in the Kaki District. Read More

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September 2021

Global gross nitrification rates are dominantly driven by soil carbon-to-nitrogen stoichiometry and total nitrogen.

Glob Chang Biol 2021 Sep 12. Epub 2021 Sep 12.

Institute of Plant Ecology (IFZ), Justus Liebig University Giessen, Heinrich-Buff-Ring 26, 35392, Giessen, Germany.

Soil gross nitrification (GN) is a critical process in the global nitrogen (N) cycle that results in the formation of nitrate through microbial oxidation of ammonium or organic N, and can both increase N availability to plants and nitrous oxide emissions. Soil GN is thought to be mainly controlled by soil characteristics and the climate, but a comprehensive analysis taking into account the climate, soil characteristics, including microbial characteristics, and their interactions to better understand the direct and indirect controlling factors of GN rates globally is lacking. Using a global meta-analysis based on 901 observations from 330 N-labelled studies, we show that GN differs significantly among ecosystem types, with the highest rates found in croplands, in association with higher pH which stimulates nitrifying bacteria activities. Read More

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September 2021

Origin of nitrate and sulfate sources in volcano-sedimentary aquifers of the East Africa Rift System: An example of the Ali-Sabieh groundwater (Republic of Djibouti).

Sci Total Environ 2021 Sep 4;804:150072. Epub 2021 Sep 4.

Bureau Géologique des Comores, 8083 Moroni Hadudja, Comoros.

Within the East African Rift System (EARS), the complex Ali-Sabieh aquifers system, located in the south of the Republic of Djibouti, was overexploited and subjected to anthropogenic and/or geogenic pollution with high concentrations of dissolved nitrate (up to 181 mg/l) and sulfates (up to 1540 mg/l). This study is the first undertaken on the hydrochemistry of this aquifer system, combining geochemical tools and multi-isotope - δH(HO), δO(HO), δO(SO), δS(SO), δN(NO), δO(NO), δC(DIC), and C- was used to decipher the origin and fate of different nitrate and sulfate sources to groundwater. The groundwater samples of the region show a chemical evolution from fresh Ca(Na)-bicarbonate to brackish Na-Cl , mainly due to water-rock interaction. Read More

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September 2021

Environmental hormesis of non-specific and specific adaptive mechanisms in plants.

Authors:
Elena A Erofeeva

Sci Total Environ 2021 Sep 4;804:150059. Epub 2021 Sep 4.

Department of Ecology, Institute of Biology and Biomedicine, Lobachevsky State University of Nizhni Novgorod, 23 Gagarina Pr, Nizhni Novgorod 603950, Russian Federation. Electronic address:

Adaptive responses of plants are important not only for local processes in populations and communities but also for global processes in the biosphere through the primary production of ecosystems. In recent years, the concept of environmental hormesis has been increasingly used to explain the adaptive responses of living organisms, including plants, to low doses of natural factors, both abiotic and biotic, as well as various anthropogenic impacts. However, the issues of whether plant hormesis is similar/different when it is induced by mild stressors having different specific effects and what is the contribution of hormetic stimulation of non-specific and specific adaptive mechanisms in plant resilience to strong stressors (i. Read More

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September 2021

Long-Term Assessment of Surface Water Quality in a Highly Managed Estuary Basin.

Int J Environ Res Public Health 2021 Sep 6;18(17). Epub 2021 Sep 6.

Department of Earth and Environment, Florida International University, Miami, FL 33199, USA.

Anthropogenic developments in coastal watersheds cause significant ecological changes to estuaries. Since estuaries respond to inputs on relatively long time scales, robust analyses of long-term data should be employed to account for seasonality, internal cycling, and climatological cycles. This study characterizes the water quality of a highly managed coastal basin, the St. Read More

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September 2021

The Comparison of Fatty Acid Composition and Lipid Quality Indices of Roach, Perch, and Pike of Lake Gusinoe (Western Transbaikalia).

Int J Environ Res Public Health 2021 Aug 27;18(17). Epub 2021 Aug 27.

Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, Sakhyanovoy St., 6, 670047 Ulan-Ude, Russia.

This paper describes the study of the fatty acid (FA) composition of three fish species (roach, perch, and pike) from Lake Gusinoe (western Transbaikalia). Using principal component analysis, the fatty acid composition of the studied fish species was shown to be species specific. The muscle tissue of roach, perch, and pike was found to contain high levels of polyunsaturated fatty acids (PUFA), including essential docosahexaenoic (DHA), eicosapentaenoic (EPA), and arachidonic acids. Read More

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Perceived Risk in the Population Living near the Turin Incinerator: Comparison between before and at Three Years of Operation.

Int J Environ Res Public Health 2021 Aug 26;18(17). Epub 2021 Aug 26.

Regional Epidemiology Unit, ASL TO3, Piedmont Region, Via Sabaudia 164, 10095 Grugliasco, Italy.

When the Turin incinerator went into operation in 2013, it was accompanied by surveillance of health effects that included a human biomonitoring survey of 394 residents. They responded to items investigating their awareness of environmental and health issues and perception of environmental health risks. In this study, we compared the questionnaire responses before plant startup and at 3 years of operation. Read More

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