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K Nagalaksmi, Madri Pramod Kumar, N Jayaraju, T Lakshmi Prasad, B Lakshmanna, G Sreenivasulu
Pulicat Lake is one of the major wetlands in India. It is the second largest brackish water lagoon in India next to Chilika Lake in Orissa state. Pulicat Lake sits beside the Bay of Bengal so, the study on the mouth is vital. The investigations were carried out by using multi-temporal satellite imageries of IRS P6, LISS III data for four years viz., 2009, 2011, 2012 and 2013. Subsequent changes in the width of the lake at the southern side were measured. It is found that the lake mouth is not static but dynamic predominantly fluctuating year by year...
December 2017: Data in Brief
Arifin Sandhi, Tommy Landberg, Maria Greger
This work investigates whether aquatic moss (Warnstorfia fluitans) originating from an arsenic (As)-contaminated wetland close to a mine tailings impoundment may be used for phytofiltration of As. The aim was to elucidate the capacity of W. fluitans to remove As from arsenite and arsenate contaminated water, how nutrients affect the As uptake and the proportion of As adsorption and absorption by the moss plant, which consists of dead and living parts. Arsenic removal from 0, 1, or 10% Hoagland nutrient solution containing 0-100 μM arsenate was followed over 192 h, and the total As in aquatic moss after treatment was analysed...
November 17, 2017: Environmental Pollution
T V Ramachandra, P B Sudarshan, M K Mahesh, S Vinay
Heavy metals are one among the toxic chemicals and accumulation in sediments and plants has been posing serious health impacts. Wetlands aid as kidneys of the landscape and help in remediation through uptake of nutrients, heavy metals and other contaminants. The analyses of macrophytes and sediment samples help in evaluating pollution status in aquatic environment. In this study concentration of six heavy metals (Cadmium (Cd), Chromium (Cr), Copper (Cu), Nickel (Ni), Lead (Pb) and Zinc (Zn)) were assessed in sediment and dominant macrophyte samples collected from Bellandur Lake, largest Lake of Bangalore, India...
November 17, 2017: Journal of Environmental Management
Xinwen Zhang, Zhen Hu, Jian Zhang, Jinlin Fan, Huu Hao Ngo, Wenshan Guo, Chujun Zeng, Yiwen Wu, Siyuan Wang
In this study, a novel aerated surface flow constructed wetland (SFCW) using exhaust gas from biological wastewater treatment was investigated. Compared with un-aerated SFCW, the introduction of exhaust gas into SFCW significantly improved NH4(+)-N, TN and COD removal efficiencies by 68.30 ± 2.06%, 24.92 ± 1.13% and 73.92 ± 2.36%, respectively. The pollutants removal mechanism was related to the microbial abundance and the highest microbial abundance was observed in the SFCW with exhaust gas because of the introduction of exhaust gas from sequencing batch reactor (SBR), and thereby optimizing nitrogen transformation processes...
September 18, 2017: Bioresource Technology
Martin A Stapanian, Brian Gara, William Schumacher
The loss of wetland habitats and their often-unique biological communities is a major environmental concern. We examined vegetation data obtained from 380 wetlands sampled in a statistical survey of wetlands in the USA. Our goal was to identify which surrounding land cover types best predict two indices of vegetation quality in wetlands at the regional scale. We considered palustrine wetlands in four regions (Coastal Plains, North Central East, Interior Plains, and West) in which the dominant vegetation was emergent, forested, or scrub-shrub...
November 16, 2017: Science of the Total Environment
Wudan Yan
Water on Earth-in our oceans, rivers, lakes, and wetlands-might seem plentiful, but water that is clean and safe enough to drink actually isn't so abundant. Nearly one in ten people still lacks access to safe water worldwide, according to the World Health Organization. In some of the world's most remote and impoverished communities, people live with no taps, showers, flushing toilets, or nearby springs, making it difficult to keep water supplies safe from bacteria, chemicals, and particulates. Moreover, access to clean drinking water isn't just a problem in the developing world; groundwater in developed countries is typically used far more quickly than it is being replenished...
November 2017: IEEE Pulse
Lei Xu, Yaqian Zhao, Cheng Tang, Liam Doherty
To figure out the impact of the separator on the electrical performance of the newly established constructed wetland-microbial fuel cell (CW-MFC), two parallel upflow CW-MFC systems, with and without glass wool (GW), were set up in this study. System performances in terms of bioelectricity production were monitored for more than 4 months. Results showed that the highest voltage was achieved in non-separator (NS) system (465.7 ± 4.2 mV with electrode spacing of 5 cm), which is 48.9% higher than the highest value generated in GW system (312 ± 7...
November 16, 2017: Journal of Environmental Management
Valerie Steen, Helen R Sofaer, Susan K Skagen, Andrea J Ray, Barry R Noon
Species distribution models (SDMs) are commonly used to assess potential climate change impacts on biodiversity, but several critical methodological decisions are often made arbitrarily. We compare variability arising from these decisions to the uncertainty in future climate change itself. We also test whether certain choices offer improved skill for extrapolating to a changed climate and whether internal cross-validation skill indicates extrapolative skill. We compared projected vulnerability for 29 wetland-dependent bird species breeding in the climatically dynamic Prairie Pothole Region, USA...
November 2017: Ecology and Evolution
Yulin Xiang, Yukun Xiang, Lipeng Wang, Yurong Jiao
In order to investigate the effect of wetland plants in the treatment of coking wastewater, Oenanthe javanica (Blume) DC (OC), Artemisia selengensis Turcz. ex Bess. (AB), Echinochloa crusgalli (L.) Beauv. (EB), Brasenia schreberi J.F.Gmel. (BG), and Lythrum salicaria L. (LL) were used to remove ammonia-nitrogen and chemical oxygen demand (COD) from coking wastewater. Results showed high concentrations (> 30%, diluted by deionized water) of coking wastewater caused decreased photosynthetic rate, transpiration rate, and relative growth rate in all studied plants...
November 16, 2017: Bulletin of Environmental Contamination and Toxicology
Jordan C Angle, Timothy H Morin, Lindsey M Solden, Adrienne B Narrowe, Garrett J Smith, Mikayla A Borton, Camilo Rey-Sanchez, Rebecca A Daly, Golnazalsdat Mirfenderesgi, David W Hoyt, William J Riley, Christopher S Miller, Gil Bohrer, Kelly C Wrighton
The current paradigm, widely incorporated in soil biogeochemical models, is that microbial methanogenesis can only occur in anoxic habitats. In contrast, here we show clear geochemical and biological evidence for methane production in well-oxygenated soils of a freshwater wetland. A comparison of oxic to anoxic soils reveal up to ten times greater methane production and nine times more methanogenesis activity in oxygenated soils. Metagenomic and metatranscriptomic sequencing recover the first near-complete genomes for a novel methanogen species, and show acetoclastic production from this organism was the dominant methanogenesis pathway in oxygenated soils...
November 16, 2017: Nature Communications
Beata Karolinczak, Wojciech Dąbrowski
Septage is wastewater stored temporarily in cesspools. A periodic supply of its significant quantities to small municipal wastewater treatment plants (WWTPs) may cause many operational problems. In the frame of the research, it has been proposed to utilize vertical flow constructed wetlands for pre-treatment of septage prior to its input to the biological stage of a WWTP. The aim of the work was to assess the effectiveness of pre-treatment in relation to factors such as: seasonality, hydraulic load, pollutants load of the VF bed and interactions between these factors...
November 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Hendrik Reuter, Julia Gensel, Marcus Elvert, Dominik Zak
A novel approach for the analysis of dissolved lignin in freshwaters is presented. Lignin concentrations in natural waters are low and a lignin extraction is usually required to obtain sufficient sample for analysis. In this method, extraction and dry down of the dissolved lignin are omitted and alkaline CuO oxidation is directly performed using 15 mL water sample in a microwave digestion system, thus reducing the required amount of sample and its preparation time considerably. Low procedural blank values are obtained by solid phase extraction (SPE) of the oxidized lignin phenols on HLB sorbents...
November 15, 2017: Analytical Chemistry
(no author information available yet)
No abstract text is available yet for this article.
November 2017: Journal of Eukaryotic Microbiology
Haiming Wu, Jian Zhang, Wenshan Guo, Shuang Liang, Jinlin Fan
Assessment of treatment performance in the large-scale constructed wetland (CW) for secondary effluent purification remains limited. The aim of this case study was to therefore to investigate the long-term treatment capacity of organics and ammonium pollutants in a large-scale multi-stage surface-flow (SF) CW fed with secondary effluents from the wastewater treatment plants (WWTPs) in northern China. The results for two-and-half-year study period indicated that the water quality parameters including chemical oxygen demand (COD) and ammonium (NH4(+)-N) met the Chinese Grade III of Environmental Quality Standards...
November 2, 2017: Bioresource Technology
Ji-Fan Hsieh, Aaron Chuah, Hardip R Patel, Karanjeet Sandhu, William J Foley, Carsten Külheim
Plants have developed complex defense mechanisms to protect themselves against pathogens. A wide-host range fungus, Austropuccinia psidii (G. Winter) Beenken comb. nov., which has caused severe damage to ecosystems and plantations worldwide, is a major threat to Australian ecosystems dominated by Myrtaceae. In particular, the east coast wetland foundation tree species Melaleuca quinquenervia appears to be variably susceptible to this pathogen. Understanding the molecular basis of host resistance would enable better management of this rust disease...
November 14, 2017: Phytopathology
Anastasia A Ivanova, Carl-Eric Wegner, Yongkyu Kim, Werner Liesack, Svetlana N Dedysh
Members of the phylum Planctomycetes are common inhabitants of northern Sphagnum-dominated wetlands. Evidence is accumulating that, in these environments, some planctomycetes may be involved in degrading polymeric organic matter. The experimental data, however, remain scarce due to the low number of characterized representatives of this phylum. In a previous study, we used metatranscriptomics to assess the activity response of peat-inhabiting microorganisms to biopolymers abundantly present in native peat. The community responses to cellulose, xylan, pectin, and chitin availability were analysed relative to unamended controls...
November 13, 2017: Antonie Van Leeuwenhoek
Marcelo B Pessôa, Thiago J Izzo, Fernando Z Vaz-de-Mello
The Pantanal is one of the world's largest tropical wetland areas and harbors high mammal biomass. There is no formal list of dung beetle species, and studies on their functional roles have never being carried out in Pantanal. In this study, we identified dung beetle species occurring in the north Pantanal region (Poconé sub-region, Brazil) and studied their functional organization, by measuring morphological, behavioral and phenological traits. We collected 25,278 individuals belonging to 17 genera and 35 species...
2017: PeerJ
Bernadette C Proemse, Rolan S Eberhard, Chris Sharples, John P Bowman, Karen Richards, Michael Comfort, Leon A Barmuta
Stromatolites are the oldest evidence for life on Earth, but modern living examples are rare and predominantly occur in shallow marine or (hyper-) saline lacustrine environments, subject to exotic physico-chemical conditions. Here we report the discovery of living freshwater stromatolites in cool-temperate karstic wetlands in the Giblin River catchment of the UNESCO-listed Tasmanian Wilderness World Heritage Area, Australia. These stromatolites colonize the slopes of karstic spring mounds which create mildly alkaline (pH of 7...
November 13, 2017: Scientific Reports
D Richard Cameron, David C Marvin, Jonathan M Remucal, Michelle C Passero
Modeling efforts focused on future greenhouse gas (GHG) emissions from energy and other sectors in California have shown varying capacities to meet the emissions reduction targets established by the state. These efforts have not included potential reductions from changes in ecosystem management, restoration, and conservation. We examine the scale of contributions from selected activities in natural and agricultural lands and assess the degree to which these actions could help the state achieve its 2030 and 2050 climate mitigation goals under alternative implementation scenarios...
November 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
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