27,753 results match your criteria lakes


Small artificial waterbodies are widespread and persistent emitters of methane and carbon dioxide.

Glob Chang Biol 2021 Jun 24. Epub 2021 Jun 24.

Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, 756 51, Uppsala, Sweden.

Inland waters play an active role in the global carbon cycle and emit large volumes of the greenhouse gases (GHGs) methane (CH ) and carbon dioxide (CO ). A considerable body of research has improved emissions estimates from lakes, reservoirs, and rivers but recent attention has been drawn to the importance of small, artificial waterbodies as poorly quantified but potentially important emission hotspots. Of particular interest are emissions from drainage ditches and constructed ponds. Read More

View Article and Full-Text PDF

Integrated ecosystems: linking food webs through reciprocal resource reliance.

Ecology 2021 Jun 24:e03450. Epub 2021 Jun 24.

School of Life Sciences, Arizona State University, Tempe, AZ, 85281, USA.

Ecosystems are defined, studied, and managed according to boundaries constructed to conceptualize patterns of interest at a certain scale and scope. The distinction between ecosystems becomes obscured when resources from multiple origins cross porous boundaries and are assimilated into food webs through repeated trophic transfers. Ecosystem compartments can define bounded localities in a heterogeneous landscape that simultaneously retain and exchange energy in the form of organic matter. Read More

View Article and Full-Text PDF

A critical review of state-of-the-art electrocoagulation technique applied to COD-rich industrial wastewaters.

Environ Sci Pollut Res Int 2021 Jun 23. Epub 2021 Jun 23.

Social Determinants of Health Research Center, Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran.

Electrocoagulation (EC) is one of the emerging technologies in groundwater and wastewater treatment as it combines the benefits of coagulation, sedimentation, flotation, and electrochemical oxidation processes. Extensive research efforts implementing EC technology have been executed over the last decade to treat chemical oxygen demand (COD)-rich industrial wastewaters with the aim to protect freshwater streams (e.g. Read More

View Article and Full-Text PDF

Study design of a randomised, placebo-controlled trial of nintedanib in children and adolescents with fibrosing interstitial lung disease.

ERJ Open Res 2021 Apr 21;7(2). Epub 2021 Jun 21.

Division of Pulmonary and Sleep Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.

Childhood interstitial lung disease (chILD) comprises >200 rare respiratory disorders, with no currently approved therapies and variable prognosis. Nintedanib reduces the rate of forced vital capacity (FVC) decline in adults with progressive fibrosing interstitial lung diseases (ILDs). We present the design of a multicentre, prospective, double-blind, randomised, placebo-controlled clinical trial of nintedanib in patients with fibrosing chILD (1199-0337 or InPedILD; ClinicalTrials. Read More

View Article and Full-Text PDF

Primary Small Cell Carcinoma of the Bladder.

Cureus 2021 May 21;13(5):e15146. Epub 2021 May 21.

College of Osteopathic Medicine, University of New England, Biddeford, USA.

A 64-year-old Caucasian man with a 20 to 25-pack-year cigarette smoking history presented to his primary care provider with the chief complaint of gross hematuria after experiencing three to four months of urinary frequency and urgency. His workup consisted of laboratory blood work, a renal/bladder ultrasound (US), a CT scan without contrast, cystoscopy with biopsy (with an attempted transurethral resection of bladder tumor), and a PET scan. He was diagnosed with stage T4 small cell carcinoma of the bladder (SCCB) shortly after seeking medical care with metastases to the liver, bone, and lymph nodes. Read More

View Article and Full-Text PDF

Socioeconomic determinants of Schistosoma mansoni infection using multiple correspondence analysis among rural western Kenyan communities: Evidence from a household-based study.

PLoS One 2021 23;16(6):e0253041. Epub 2021 Jun 23.

Neglected Tropical Diseases Branch, Center for Global Health Research, Kenya Medical Research Institute (KEMRI), Kisumu, Kenya.

Background: Socioeconomic inequality including wealth distribution is a barrier to implementation of health policies. Wealth distribution can be measured effectively using household data on durable assets. Compared to other methods of analysing Socio-economic Status (SES) using durable assets, Multiple Correspondence Analysis (MCA) can create more reliable wealth quintiles. Read More

View Article and Full-Text PDF

A spatially explicit model for estimating risks of pesticide exposure to bird populations.

PLoS One 2021 23;16(6):e0252545. Epub 2021 Jun 23.

US Environmental Protection Agency, Office of Pesticide Programs, Environmental Fate and Effects Division, Washington, DC, United States of America.

Pesticides are used widely in agriculture and have the potential to affect non-target organisms, including birds. We developed an integrated modeling system to allow for spatially-explicit evaluation of potential impacts to bird populations following exposures to pesticides. Our novel methodology builds upon three existing models: the Terrestrial Investigation Model (TIM), the Markov Chain Nest Productivity Model (MCnest), and HexSim to simulate population dynamics. Read More

View Article and Full-Text PDF

CRISPR-Cas9 Editing of CAFFEOYL SHIKIMATE ESTERASE 1 and 2 Shows Their Importance and Partial Redundancy in Lignification in Populus tremula x P. alba.

Plant Biotechnol J 2021 Jun 23. Epub 2021 Jun 23.

Ghent University, Department of Plant Biotechnology and Bioinformatics, 9052, Ghent, Belgium.

Lignins are cell-wall-located aromatic polymers that provide strength and hydrophobicity to woody tissues. Lignin monomers are synthesized via the phenylpropanoid pathway, wherein CAFFEOYL SHIKIMATE ESTERASE (CSE) converts caffeoyl shikimate into caffeic acid. Here, we explored the role of the two CSE homologs in poplar (Populus tremula x P. Read More

View Article and Full-Text PDF

Sources and Risk Factors for Nitrate and Microbial Contamination of Private Household Wells in the Fractured Dolomite Aquifer of Northeastern Wisconsin.

Environ Health Perspect 2021 Jun 23;129(6):67004. Epub 2021 Jun 23.

Environmentally Integrated Dairy Management Research Unit, U.S. Dairy Forage Research Center, U.S. Department of Agriculture-Agricultural Research Service (USDA-ARS), Marshfield, Wisconsin, USA.

Background: Groundwater quality in the Silurian dolomite aquifer in northeastern Wisconsin, USA, has become contentious as dairy farms and exurban development expand.

Objectives: We investigated private household wells in the region, determining the extent, sources, and risk factors of nitrate and microbial contamination.

Methods: Total coliforms, , and nitrate were evaluated by synoptic sampling during groundwater recharge and no-recharge periods. Read More

View Article and Full-Text PDF

Divergent regional evolutionary histories of a devastating global amphibian pathogen.

Proc Biol Sci 2021 Jun 23;288(1953):20210782. Epub 2021 Jun 23.

Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, CA, USA.

Emerging infectious diseases are a pressing threat to global biological diversity. Increased incidence and severity of novel pathogens underscores the need for methodological advances to understand pathogen emergence and spread. Here, we use genetic epidemiology to test, and challenge, key hypotheses about a devastating zoonotic disease impacting amphibians globally. Read More

View Article and Full-Text PDF

Baseline for rainwater chemistry and quality as influenced by Nyiragongo volcano permanent plume, East Africa.

Chemosphere 2021 Jun 7;283:130859. Epub 2021 Jun 7.

Geochemistry and Environmental Department, Goma Volcano Observatory, 142, Av. du Rond Point, Goma, Congo; Department of Chemistry, Institut Supérieur Pédagogique de Bukavu, PO Box 854, Bukavu, Congo; Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Via Ugo La Malfa, 153, 90146, Palermo, Italy.

Single rainwater samples were collected in the city of Goma (~1,1 million inhabitants), eastern Democratic Republic of the Congo, from January to June 2013 to draw a baseline for rainwater chemical composition and quality as influenced by the permanent plume of Nyiragongo volcano. This was a better period for a baseline as the neighboring Nyamulagira volcano, only 15 km apart, had no important degassing from its central crater, and hence the recorded volcanic influence on the rainwater chemistry was solely from Nyiragongo's lava lake which has been active since May 2002. The baseline for the rainwater chemistry and quality is important for this highly populated region where rainwater is the unique potable water source for the inhabitants of many villages surrounding the volcanoes, and for some of the inhabitants of the city of Goma. Read More

View Article and Full-Text PDF

Individual-based modelling of cyanobacteria blooms: Physical and physiological processes.

Sci Total Environ 2021 Jun 11;792:148418. Epub 2021 Jun 11.

School of Engineering and Built Environment, Griffith University, QLD 4222, Australia.

Lakes and reservoirs throughout the world are increasingly adversely affected by cyanobacterial harmful algal blooms (CyanoHABs). The development and spatiotemporal distributions of blooms are governed by complex physical mixing and transport processes that interact with physiological processes affecting the growth and loss of bloom-forming species. Individual-based models (IBMs) can provide a valuable tool for exploring and integrating some of these processes. Read More

View Article and Full-Text PDF

Spatial-temporal variation, sources and driving factors of organic carbon burial in rift lakes on Yunnan-Guizhou plateau since 1850.

Environ Res 2021 Jun 19:111458. Epub 2021 Jun 19.

Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes, China. Electronic address:

Burial of organic carbon (OC) in rift lakes on plateau is an important part of the global cycle. It is affected by natural and anthropogenic factors. In this study, we selected the sediment records of 7 rift lakes on the Yunnan-Guizhou Plateau to study spatial-temporal variation, sources and driving factors of organic carbon burial since 1850. Read More

View Article and Full-Text PDF

Synergistic Effect of Surface Chemistry and Surface Topography Gradient on Osteogenic/Adipogenic Differentiation of hMSCs.

ACS Appl Mater Interfaces 2021 Jun 22. Epub 2021 Jun 22.

Unit of STEM, University of South Australia, Mawson Lakes 5095, Australia.

Much attention has been paid to understanding the individual effects of surface chemistry or topography on cell behavior. However, the synergistic influence of both surface chemistry and surface topography on differentiation of human mesenchymal stem cells (hMSCs) should also be addressed. Here, gold nanoparticles were immobilized in an increasing number density manner to achieve a surface topography gradient; a thin film rich in amine (-NH) or methyl (-CH) chemical groups was plasma-polymerized to adjust the surface chemistry of the outermost layer (ppAA and ppOD, respectively). Read More

View Article and Full-Text PDF

Review of Hip and Knee Osteoarthritis.

JAMA 2021 06;325(24):2504-2505

New York Medical College, Kent Lakes.

View Article and Full-Text PDF

Fatal Human Infection with Evidence of Intrahost Variation of Eastern Equine Encephalitis Virus, Alabama, USA, 2019.

Emerg Infect Dis 2021 Jul;27(7):1886-1892

Eastern equine encephalitis virus (EEEV) is an arbovirus in the family Togaviridae, genus Alphavirus, found in North America and associated with freshwater/hardwood swamps in the Atlantic, Gulf Coast, and Great Lakes regions. EEEV disease in humans is rare but causes substantial illness and death. To investigate the molecular epidemiology and microevolution of EEEV from a fatal case in Alabama, USA, in 2019, we used next-generation sequencing of serum and cerebrospinal fluid (CSF). Read More

View Article and Full-Text PDF

Molecular surveillance of Cryptosporidium spp. for microbial source tracking of fecal contamination in Laguna Lake, Philippines.

J Water Health 2021 Jun;19(3):534-544

Pathogen-Host-Environment Interactions Research Laboratory, Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City 1101, Philippines E-mail:

Water quality deterioration in source waters poses increased health, environmental, and economic risks. Here, we genotyped Cryptosporidium spp. obtained from water samples of Laguna Lake, Philippines, and its tributaries for the purpose of source-tracking fecal contamination. Read More

View Article and Full-Text PDF

Drug Development for Mental Illness: How Psychiatry Clinical Trial Sites are Meeting the Challenge of the COVID-19 Pandemic.

Innov Clin Neurosci 2021 Jan-Mar;18(1-3):35-38. Epub 2021 Jan 1.

Drs. Litman is with CBH Health, Georgetown University Medical School in Washington, DC.

The goal was to review the impact of the COVID-19 pandemic on psychiatric drug development and clinical trials. Disruption of pharmaceutical industry- sponsored clinical trials for psychiatric disorders by the COVID-19 pandemic, prompted by concerns regarding the safety of trial participants and the feasibility of trial conduct, has adversely impacted psychiatric drug development. In response, psychiatry trial sites have modified clinical trials and adapted trial conduct, through the use of social distancing, personal protective equipment, laboratory testing, and remote assessments, to reduce the risks of COVID-19. Read More

View Article and Full-Text PDF
January 2021

Polybrominated diphenyl ethers in the environmental systems: a review.

J Environ Health Sci Eng 2021 Jun 15;19(1):1229-1247. Epub 2021 Apr 15.

SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700 South Africa.

PBDEs are human-influenced chemicals utilized massively as flame retardants. They are environmentally persistent, not easily degraded, bioaccumulate in the biological tissue of organisms, and bio-magnify across the food web. They can travel over a long distance, with air and water being their possible transport media. Read More

View Article and Full-Text PDF

Environmental impact assessment of salt harvesting from the salt lakes.

J Environ Health Sci Eng 2021 Jun 26;19(1):365-377. Epub 2021 Jan 26.

Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran.

Urmia Saline Lake, USL which is registered as an international park by the United Nations, has suffered hypersalinity and serious dryness in recent years. Increasing the dryness trend has been led to a great tendency, especially by private sectors to harvest salt from different parts of the bed sediments. During this study the four- step process was used for environmental impact assessment of such a large scale salt harvesting activities with specialized Folchi matrix and enriched by data on heavy metal concentrations in the limited number of sediment samples. Read More

View Article and Full-Text PDF

Injection Technique: Development of a Novel Questionnaire and User Guide.

Diabetes Spectr 2021 May 22;34(2):156-165. Epub 2021 Dec 22.

BD, Franklin Lakes, NJ.

Objective: Approximately 200 million people worldwide use injectable therapies as part of diabetes management. There appears to be a significant gap between insulin injection technique recommendations and injection practice for many. We aimed to develop and validate a novel, brief, self-administered injection technique assessment questionnaire. Read More

View Article and Full-Text PDF

Occurrence and risk assessment of pharmaceuticals and personal care products (PPCPs) against COVID-19 in lakes and WWTP-river-estuary system in Wuhan, China.

Sci Total Environ 2021 Jun 12;792:148352. Epub 2021 Jun 12.

Department of Environmental Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, PR China.

The consumption of pharmaceuticals and personal care products (PPCPs) for controlling and preventing the COVID-19 would have sharply increased during the pandemic. To evaluate their post-pandemic environmental impacts, five categories of drugs were detected in lakes and WWTP-river-estuary system near hospitals of Jinyintan, Huoshenshan and Leishenshan in the three regions (J, H and L) (Regions J, H and L) in Wuhan, China. The total amount of PPCPs (ranging from 2. Read More

View Article and Full-Text PDF

Effects of microcystin-producing and non-microcystin-producing Microcystis on the behavior and life history traits of Chironomus pallidivittatus.

Environ Pollut 2021 Jun 16;287:117613. Epub 2021 Jun 16.

Key Laboratory of Algal Biology of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China. Electronic address:

Species of the genus Microcystis are among the most notorious cyanobacteria in eutrophic lakes worldwide, with ability present adverse effects on many aquatic organisms. In the surface sediments, Microcystis can be ingested by benthic macroinvertebrates such as Chironomus. However, the potential negative effects of Microcystis on Chironomus life history traits remain unclear. Read More

View Article and Full-Text PDF

Phosphorus cycling in freshwater lake sediments: Influence of seasonal water level fluctuations.

Sci Total Environ 2021 Jun 10;792:148383. Epub 2021 Jun 10.

School of Environmental Studies, China University of Geosciences, Wuhan 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China.

Freshwater lakes experience drastic water level fluctuations because of climate change and human activities. However, the influence of such fluctuations on phosphorus cycling in sediments has rarely been investigated. We conducted a geochemical investigation on the phosphorus cycle in a shallow freshwater lake, Dongting Lake; under the influence of human activities and climate change, its water regime undergoes drastic changes. Read More

View Article and Full-Text PDF

Impacts of volcanic eruptions and early recovery in freshwater environments and organisms.

Biol Rev Camb Philos Soc 2021 Jun 19. Epub 2021 Jun 19.

Laboratorio de Limnología, Instituto de Investigaciones en Biodiversidad y Medioambiente, CONICET - Universidad Nacional del Comahue, Quintral 1250, Bariloche, Río Negro, 8400, Argentina.

Volcanic eruptions modify environments physically and chemically with serious consequences for the biota. In this review, we analysed 80 papers reporting the effects of volcanic eruptions in freshwater environments and on freshwater organisms. An increase in water turbidity is the most common reported physical effect while increases in concentrations of inorganic elements, many representing nutrients for primary producers, are the most common chemical effects. Read More

View Article and Full-Text PDF

Spatial abundance and distribution of picocyanobacterial communities in two contrasting lakes revealed using environmental DNA metabarcoding.

FEMS Microbiol Ecol 2021 Jun;97(7)

Cawthron Institute, 98 Halifax St East, Private Bag 2, Nelson 7042, New Zealand.

Freshwater picocyanobacteria (Pcy) are important yet understudied components of lake ecosystems. Most previous studies have relied on cell abundances to assess Pcy dynamics in largely oligotrophic lakes, while little is known about spatial diversity and dynamics across different lake types. In the present study we assessed the horizontal-spatial abundance and community structure of Pcy in two contrasting (oligotrophic and hypertrophic) New Zealand lakes using epifluorescence microscopy and 16S rRNA metabarcoding. Read More

View Article and Full-Text PDF

Large model structural uncertainty in global projections of urban heat waves.

Nat Commun 2021 06 18;12(1):3736. Epub 2021 Jun 18.

Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, USA.

Urban heat waves (UHWs) are strongly associated with socioeconomic impacts. Here, we use an urban climate emulator combined with large ensemble global climate simulations to show that, at the urban scale a large proportion of the variability results from the model structural uncertainty in projecting UHWs in the coming decades under climate change. Omission of this uncertainty would considerably underestimate the risk of UHW. Read More

View Article and Full-Text PDF

Biofilm growth on buoyant microplastics leads to changes in settling rates: Implications for microplastic retention in the Great Lakes.

Mar Pollut Bull 2021 Jun 15;170:112573. Epub 2021 Jun 15.

University of Toronto Scarborough, 1265 Military Trail, Scarborough, ON M1C 1A4, Canada.

Buoyant microplastic pollution disperses widely from sources via strong wind-driven water currents in lakes and oceans. This ability for dispersal depends critically upon the particle's density, which can change over time due to microbial growth (biofilm). This study quantifies biofilm-induced sinking rates of irregularly-shaped polypropylene granules (~125-2000 μm) via ex-situ experiments emulating a Great Lakes freshwater environment. Read More

View Article and Full-Text PDF

Antimicrobial Resistance Trends in Urine Escherichia coli Isolates From Adult and Adolescent Females in the United States From 2011-2019: Rising ESBL Strains and Impact on Patient Management.

Clin Infect Dis 2021 Jun 18. Epub 2021 Jun 18.

GlaxoSmithKline plc., Collegeville, Pennsylvania, USA.

Background: Uncomplicated urinary tract infection (uUTI) is predominantly caused by Escherichia coli, which has increasing antimicrobial resistance (AMR) at the US-community level. As uUTI is often treated empirically, assessing AMR is challenging and there are limited contemporary data characterizing period prevalence in the US.

Methods: This was a retrospective study of AMR using Becton, Dickinson and Company Insights Research Database (Franklin Lakes, NJ) data collected 2011-2019. Read More

View Article and Full-Text PDF

Reconstruction of sedimentation rates based on the chronological framework of Lake Pykara, Tamil Nadu, India.

Environ Monit Assess 2021 Jun 18;193(7):428. Epub 2021 Jun 18.

Department of Earth Sciences, Annamalai University, Tamil Nadu, India.

This work presents a piece of initial information about the estimation of the sedimentation rate for Lake Pykara. In this investigation, a chronological sequence of sediment core was set up dependent on Cs and Pb analysis to study sediment accumulation rates in Lake Pykara. Caesium-137 (Cs) is an artificial radionuclide and is regularly utilized in building up the chronology of lake sediments in the Anthropocene period. Read More

View Article and Full-Text PDF