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https://www.readbyqxmd.com/read/30121046/chlorophyll-a-predictability-and-relative-importance-of-factors-governing-lake-phytoplankton-at-different-timescales
#1
Xia Liu, Jianfeng Feng, Yuqiu Wang
Assessing the key drivers of eutrophication in lakes and reservoirs has long been a challenge, and many studies have developed empirical models for predicting the relative importance of these drivers. However, the relative roles of various parameters might differ not only spatially (between regions or localities) but also at a temporal scale. In this study, the relative roles of total phosphorus, total nitrogen, ammonia, wind speed and water temperature were selected as potential drivers of phytoplankton biomass by using chlorophyll a as a proxy for biomass...
August 11, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30120120/the-metabolic-capability-and-phylogenetic-diversity-of-mono-lake-during-a-bloom-of-the-eukaryotic-phototroph-picocystis-strain-ml
#2
Blake W Stamps, Heather S Nunn, Victoria A Petryshyn, Ronald S Oremland, Laurence G Miller, Michael R Rosen, Kohen W Bauer, Katharine J Thompson, Elise M Tookmanian, Anna R Waldeck, Sean J Loyd, Hope A Johnson, Bradley S Stevenson, William M Berelson, Frank A Corsetti, John R Spear
Algal blooms in lakes are often associated with anthropogenic eutrophication; however, they can occur without the human introduction of nutrients to a lake. A rare bloom of the alga Picocystis strain ML occurred in Spring of 2016 at Mono Lake, a hyperalkaline lake in California, which was also at the apex of a multi-year long drought. These conditions presented a unique sampling opportunity to investigate microbiological dynamics and potential metabolic function during an intense natural algal bloom. We conducted a comprehensive molecular analysis along a depth transect near the center of the lake from surface to 25 m depth in June, 2016...
August 17, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/30117027/water-quality-assessment-of-the-most-important-dam-latyan-dam-in-tehran-iran
#3
Anoushirvan Mohseni-Bandpei, Saeed Motesaddi, Mohsen Eslamizadeh, Mohammad Rafiee, Mohsen Nasseri, Masoud Montazeri Namin, Yalda Hashempour, Yadollah Mehrabi, Seyed Mohammad Riahi
A pattern of water quality affected by the input regime and site specification is one of the most important issues in water supply resources and demand management. The present study aims to assess the water quality of Latyan dam, the important reservoir that supplies drinking water of Tehran, the capital city of Iran. Monthly water sampling was performed at four depths of the dam. The physical and chemical properties of water including temperature, pH, turbidity, total dissolved solids (TDS), electrical conductivity (EC), hardness, as well as Ca2+ , Mg2+ , Na+ , K+ , Cl- , SO4 2- , silica, ammonium, nitrate, nitrite, and total phosphorus (TP) concentration, were monitored from May 2014 to January 2017...
August 16, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30114571/assessment-of-the-treatment-efficiency-of-an-urban-stormwater-pond-and-its-impact-on-the-natural-downstream-watercourse
#4
A Ivanovsky, A Belles, J Criquet, D Dumoulin, P Noble, C Alary, G Billon
During the last few decades, stormwater ponds have become an alternative management practice in order to avoid flooding and to contain rainwater and runoff in urban areas where impervious land cover has increased. A second purpose of stormwater ponds is to improve the quality of runoff water that is usually contaminated with nitrogen, phosphorus, metals and organic micropollutants. Processes used are based on natural methods such as settlement and contribute to minimize the impact of these inputs to the natural aquatic system...
August 13, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/30111555/channeling-vorticity-modeling-the-filter-feeding-mechanism-in-silver-carp-using-%C3%AE-ct-and-3d-piv
#5
Karly E Cohen, L Patricia Hernandez, Callie H Crawford, Brooke E Flammang
Invasive silver carp are thriving within eutrophic environments in the United States due in part to their highly efficient filter-feeding mechanism. Like many filter feeding fishes, silver carp utilize modified gill rakers to capture a specific range of food; however, the greatly modified filtering morphology of silver carp allows them to feed on phytoplankton and zooplankton ranging in size from 4-85μm. The filtering apparatus of silver carp is comprised of rigid filtering plates where the outer anatomy of these plates is characterized by long parallel channels (riddled with openings of different sizes) that change in orientation along the length of the plate...
August 15, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/30110111/evaluation-of-nutritional-status-in-patients-with-cystic-fibrosis-according-to-age-group
#6
Lenycia de Cassya Lopes Neri, Denise Pimentel Bergamaschi, Luiz Vicente Ribeiro Ferreira da Silva Filho
OBJECTIVE: To evaluate the nutritional profile of the population assisted at a reference center for cystic fibrosis treatment. METHODS: Cross-sectional study including patients with cystic fibrosis assisted at a pediatric reference center in São Paulo, Brazil, in 2014. All patients attending regular visits who agreed to participate in the study were included. A questionnaire on dietary habits (24-hour diet recall) and socioeconomic characteristics was applied. Anthropometric data (compared with the reference from the World Health Organization, 2006 and 2007) and pulmonary function data were collected from medical records...
August 9, 2018: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
https://www.readbyqxmd.com/read/30107888/comprehensive-approach-to-restoring-urban-recreational-reservoirs-part-2-use-of-zooplankton-as-indicators-for-the-ecological-quality-assessment
#7
Tomasz Jurczak, Adrianna Wojtal-Frankiewicz, Piotr Frankiewicz, Zbigniew Kaczkowski, Zuzanna Oleksińska, Agnieszka Bednarek, Maciej Zalewski
The presented research is part of the LIFE project ("EH-REK" LIFE08 ENV/PL/000517) on innovative restoration methods for small urban impoundments in the city of Łódź (Poland). The objective was to evaluate the usefulness of zooplankton as a biological quality element, when assessing the effectiveness of restoration efforts in three urban reservoirs and a one pond. The fifth unrestored pond was used as an example of the progressive eutrophication of an urban ecosystem. Studies were conducted during two periods: before (2010-2012) and after (2013-2016) restoration...
August 2, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30107309/exploratory-study-on-modification-of-sludge-based-activated-carbon-for-nutrient-removal-from-stormwater-runoff
#8
Chaoyang Yue, Loretta Y Li, Chris Johnston
Nutrients (P, N) in stormwater runoff are a major cause of eutrophication and algal blooms. A promising solution to this problem is to amend the rain garden growing medium (RGGM) with sewage sludge-based activated carbon (SBAC). To optimize the SBAC production process, different metals, pyrolysis conditions (temperature, heating time, carrier gas), and post-treatments were explored. When pyrolyzed at 400 °C for two hours, Zn-activated SBAC removed up to 41% of PO4 -P (initial concentration of 1 mg/L) and 72% of NO3 -N (initial concentration of 2 mg/L), at a dose of 1 g sorbent/L of nutrient-spiked distilled water...
August 11, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/30103653/environmental-profile-of-an-innovative-household-biowaste-dryer-system-based-on-life-cycle-assessment
#9
Giorgos E Konstantzos, Dimitrios Malamis, Aggelos Sotiropoulos, Maria Loizidou
An alternative approach to biowaste management involves the application of an innovative household dryer for the dehydration of biowaste at source, in order to significantly reduce its mass and volume, and subsequently the collection frequency. The main objective of this work is to assess the potential impacts of the system under examination, which involves the household dryer use and kerbside collection of the dehydrated residues (biomass), by conducting a Life Cycle Assessment study. The stages considered in the present study include the following: (a) the construction of the household biowaste dryer; (b) the use of the dryer and the collection of dehydrated residues; (c) the end-of-life treatment of the dryer...
August 14, 2018: Waste Management & Research
https://www.readbyqxmd.com/read/30096687/significant-chemical-fluxes-from-natural-terrestrial-groundwater-rival-anthropogenic-and-fluvial-input-in-a-large-river-deltaic-estuary
#10
Xin Luo, Jiu Jimmy Jiao, Willard S Moore, John A Cherry, Ya Wang, Kun Liu
The shores of the Pearl River estuary are home to 35 million people. Their wastes are discharged into the large river delta-front estuary (LDE), one of the most highly polluted systems in the world. Here we construct a radium reactive transport model to estimate the terrestrial groundwater discharge (TGD) into the highly urbanized Pearl River LDE. We find the TGD comprises only approximately 0.9% in term of water discharge compared to the river discharge. The TGD in the Pearl River LDE delivers significant chemical fluxes to the coast, which are comparable to the fluvial loadings from Pearl River and other world major rivers...
July 31, 2018: Water Research
https://www.readbyqxmd.com/read/30094364/assessment-and-remediation-of-pollutants-in-ghana-s-kete-krachi-district-hospital-effluents-using-granular-and-smooth-activated-carbon
#11
Samuel Kofi Tulashie, Francis Kotoka, Foster Kwame Kholi, Samira Esinam Elsie Aggor-Woananu, Gifty Rhodalyn Tetteh
The need for simple, cheaper and high performance hospital effluent treatment system in Kete-Krachi District which is adjacent to the Lake Volta has necessitated this study. This study focuses on assessing, and treating Kete-Krachi District Hospital effluent using packed granular (GAC) and smooth activated carbon (SAC). The use of activated carbon is due to its less expensive method of operation, the ease to prepare from local raw materials, high availability, and effectiveness for treating hospital effluent...
July 2018: Heliyon
https://www.readbyqxmd.com/read/30091826/diet-and-other-environmental-factors-shape-the-bacterial-communities-of-fish-gut-in-an-eutrophic-lake
#12
E N Kashinskaya, E P Simonov, M R Kabilov, G I Izvekova, K B Andree, M M Solovyev
AIMS: The aim of this work was to study the gut microbial diversity from eight species of wild fish with different feeding habits, digestive physiology (gastric vs. agastric) and provide comparative structural analysis of the microbial communities within their environment (food items, water, sediments, and macrophytes). METHODS AND RESULTS: The microbiota of fish gut and their prey items were studied using next generation high-throughput sequencing of the 16S ribosomal RNA genes...
August 9, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/30090911/effects-of-elevated-production-of-autochthonous-dissolved-organic-matter-on-the-freely-dissolved-concentration-of-cadmium
#13
Qianqian Dong, Feng Wang, Yihua Xiao, Penghui Li, Qinghui Huang
Eutrophication enhances the production of autochthonous dissolved organic matter (DOM), which is a major driving factor behind the impairment of many aquatic ecosystems. In a mesocosm study, we investigated the effects of the abundance and composition of DOM on the potential bioavailability of cadmium (Cd) caused by eutrophication, using three-dimensional excitation-emission matrix fluorescence spectroscopy integrated with tangential flow ultrafiltration technology. The complexing capacity of DOM-Cd and the sorption distribution coefficient between DOM and the bulk solution was calculated based on a 1 : 1 complexation model...
August 9, 2018: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/30088466/assessing-the-environmental-impact-of-the-dairy-processing-industry-in-the-republic-of-ireland
#14
William Finnegan, Jamie Goggins, Xinmin Zhan
This Research Communication describes the methodology used and the subsequent results obtained for an assessment of the environmental impact associated with the manufacture of dairy products in the Republic of Ireland. As the Irish dairy industry changes and grows, it is necessary to have a benchmark of the environmental performance of the sector if it is to remain sustainable in the future. In order to estimate the environmental impact, life cycle assessment has been implemented, which has been structured in accordance with the International Organisation for Standardisation guidelines...
August 8, 2018: Journal of Dairy Research
https://www.readbyqxmd.com/read/30088246/relationship-between-phytoplankton-community-and-environmental-factors-in-landscape-water-with-high-salinity-in-a-coastal-city-of-china
#15
Nan Wang, Jiaqing Xiong, Xiaochang C Wang, Yan Zhang, Honglei Liu, Bin Zhou, Pan Pan, Yanzheng Liu, Feiyang Ding
Relationship between phytoplankton community and environmental variables was explored in three landscape water bodies (namely Jiyun River Oxbow (JRO), Qingjing Lake (QL), and Jiyun River (JR)) with high salinity, located in Sino-Singapore Tianjin Eco-city of China, using redundancy analysis (RDA). A total of 48 species of phytoplankton were identified during the study period, in which Chlorophyta and Bacillariophyta accounted for 35.42 and 31.25%, respectively. The most dominant species of the studied water bodies were Cyclotella meneghiniana (Bacillariophyta) and Aphanocapsa elachista (Cyanophyta)...
August 7, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30086500/spatio-temporal-variation-of-nitrate-sources-to-lake-winnipeg-using-n-and-o-isotope-%C3%AE-15-n-%C3%AE-18-o-analyses
#16
David X Soto, Geoff Koehler, Leonard I Wassenaar, Keith A Hobson
Anthropogenic nitrogen inputs into Lake Winnipeg, Canada, from watershed sources have increased during the last decades, contributing to eutrophication. These nutrient N inputs include loadings from agriculture (inorganic fertilizer and animal waste) and urban sources (wastewater discharge from sewage treatment plants). The aim of this study was to evaluate the sources and seasonal patterns of dissolved nitrates in two major contributors to Lake Winnipeg; the Assiniboine and Red rivers. The relative contribution of nitrate sources was estimated using Bayesian isotope mixing models incorporating δ15 N and δ18 O values of dissolved nitrate...
July 29, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/30083895/the-way-forward-confronting-eco-environmental-challenges-during-land-use-practices-a-bibliometric-analysis
#17
Quan Wu, Jun Hao, Yanhua Yu, Jianguo Liu, Pengyu Li, Zhining Shi, Tianlong Zheng
With rapid urbanisation and industrialisation, land-use practice, while satisfying the ever-increasing desires of our material civilisation in the short term, may undermine natural ecosystems on a local, regional and global scale in the long run. Innovative and sustainable land-use practices should be developed in response, so that eco-environmental problems can assessed and dealt with during the whole process of land-use planning, construction, operation, maintenance and management. Using a bibliometric analysis, this study has traced global trends in land-use research from 1992 to 2016, as indexed in the Science Citation Index EXPANDED (SCI-EXPANDED) and the Social Sciences Citation Index (SSCI)...
August 6, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30082049/linking-sustainability-to-the-healthy-eating-patterns-of-the-dietary-guidelines-for-americans-a-modelling-study
#18
Nicole Tichenor Blackstone, Naglaa H El-Abbadi, Margaret S McCabe, Timothy S Griffin, Miriam E Nelson
BACKGROUND: Evidence-based nutrition policy is a key mechanism to promote planetary health. In the USA, the Dietary Guidelines for Americans are the foundation of nutrition policy and guide more than US$80 billion in federal spending. Recent attempts have been made to incorporate sustainability into the development of the Dietary Guidelines. However, the sustainability of the 2015-20 Dietary Guidelines remains unclear; research has not yet assessed the environmental impacts of the distinct healthy patterns recommended by the policy...
August 2018: The Lancet. Planetary health
https://www.readbyqxmd.com/read/30081995/-effect-of-linolenic-acid-on-bioavailability-of-cadmium-in-eutrophic-water
#19
Bo Chen, Mei Shi, Hao Yan, Tingting Zhang
OBJECTIVE: To investigate the bioavailability of heavy metal cadmium on planktonic algae under the condition of containing linolenic acid. METHODS: Using different concentrations of Cd~(2+)( 0. 10, 0. 20, 0. 30 and 0. 40 mg/L) alone, as well as different combinations of cadmium with 0. 01 mL/L linolenic acid that acted on Scenedesmus obliquus and Microcystis aeruginosa respectively, then the growth-inhibitory of S. obliquus and M. aeruginosa and the absorption of cadmium and adsorption of cadmium by S...
July 2018: Wei Sheng Yan Jiu, Journal of Hygiene Research
https://www.readbyqxmd.com/read/30081367/an-ounce-of-prevention-is-worth-a-pound-of-cure-managing-macrophytes-for-nitrate-mitigation-in-irrigated-agricultural-watersheds
#20
Elisa Soana, Marco Bartoli, Marco Milardi, Elisa Anna Fano, Giuseppe Castaldelli
Although ubiquitous elements of agricultural landscapes, the interest on ditches and canals as effective filters to buffer nitrate pollution has been raised only recently. The aim of the present study was to investigate the importance of in-ditch denitrification supported by emergent aquatic vegetation in the context of N budget in agricultural lands of a worldwide hotspot of nitrate contamination and eutrophication, i.e. the lowlands of the Po River basin (Northern Italy). The effectiveness of N abatement in the ditch network (>18,500 km) was evaluated by extrapolating up to the watershed reach-scale denitrification rates measured in a wide range of environmental conditions...
July 29, 2018: Science of the Total Environment
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