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https://www.readbyqxmd.com/read/28938190/phytobeds-with-fimbristylis-dichotoma-and-ammannia-baccifera-for-treatment-of-real-textile-effluent-an-in-situ-treatment-anatomical-studies-and-toxicity-evaluation
#1
Suhas K Kadam, Vishal V Chandanshive, Niraj R Rane, Swapnil M Patil, Avinash R Gholave, Rahul V Khandare, Amrut R Bhosale, Byong-Hun Jeon, Sanjay P Govindwar
Fimbristylis dichotoma, Ammannia baccifera and their co-plantation consortium FA independently degraded Methyl Orange, simulated dye mixture and real textile effluent. Wild plants of F. dichotoma and A. baccifera with equal biomass showed 91% and 89% decolorization of Methyl Orange within 60h at a concentration of 50ppm, while 95% dye removal was achieved by consortium FA within 48h. Floating phyto-beds with co-plantation (F. dichotoma and A. baccifera) for the treatment of real textile effluent in a constructed wetland was observed to be more efficient and achieved 79%, 72%, 77%, 66% and 56% reductions in ADMI color value, COD, BOD, TDS and TSS of textile effluent, respectively...
September 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28932888/assessment-of-molecular-detection-of-anaerobic-ammonium-oxidizing-anammox-bacteria-in-different-environmental-samples-using-pcr-primers-based-on-16s-rrna-and-functional-genes
#2
Ping Han, Uli Klümper, Alex Wong, Meng Li, Jih-Gaw Lin, Zhexue Quan, Martin Denecke, Ji-Dong Gu
Eleven published PCR primer sets for detecting genes encoding 16S ribosomal RNA (rRNA), hydrazine oxidoreductase (HZO), cytochrome cd 1-containing nitrite reductase (NirS), and hydrazine synthase subunit A (HzsA) of anaerobic ammonium-oxidizing (anammox) bacteria were assessed for the diversity and abundance of anammox bacteria in samples of three environments: wastewater treatment plant (WWTP), wetland of Mai Po Nature Reserve (MP), and the South China Sea (SCS). Consistent phylogenetic results of three biomarkers (16S rRNA, hzo, and hzsA) of anammox bacteria were obtained from all samples...
September 20, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28932210/antibacterial-activity-of-endophytic-actinomycetes-isolated-from-the-medicinal-plant-vochysia-divergens-pantanal-brazil
#3
Francielly M W R Gos, Daiani C Savi, Khaled A Shaaban, Jon S Thorson, Rodrigo Aluizio, Yvelise M Possiede, Jürgen Rohr, Chirlei Glienke
Endophytic actinomycetes from medicinal plants produce a wide diversity of secondary metabolites (SM). However, to date, the knowledge about endophytes from Brazil remains scarce. Thus, we analyzed the antimicrobial potential of 10 actinomycetes isolated from the medicinal plant Vochysia divergens located in the Pantanal sul-mato-grossense, an unexplored wetland in Brazil. Strains were classified as belonging to the Aeromicrobium, Actinomadura, Microbacterium, Microbispora, Micrococcus, Sphaerisporangium, Streptomyces, and Williamsia genera, through morphological and 16S rRNA phylogenetic analyzes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28931842/restoring-tides-to-reduce-methane-emissions-in-impounded-wetlands-a-new-and-potent-blue-carbon-climate-change-intervention
#4
Kevin D Kroeger, Stephen Crooks, Serena Moseman-Valtierra, Jianwu Tang
Coastal wetlands are sites of rapid carbon (C) sequestration and contain large soil C stocks. Thus, there is increasing interest in those ecosystems as sites for anthropogenic greenhouse gas emission offset projects (sometimes referred to as "Blue Carbon"), through preservation of existing C stocks or creation of new wetlands to increase future sequestration. Here we show that in the globally-widespread occurrence of diked, impounded, drained and tidally-restricted salt marshes, substantial methane (CH4) and CO2 emission reductions can be achieved through restoration of disconnected saline tidal flows...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28929570/impacts-of-human-induced-environmental-change-in-wetlands-on-aquatic-animals
#5
Michael Sievers, Robin Hale, Kirsten M Parris, Stephen E Swearer
Many wetlands harbour highly diverse biological communities and provide extensive ecosystem services; however, these important ecological features are being altered, degraded and destroyed around the world. Despite a wealth of research on how animals respond to anthropogenic changes to natural wetlands and how they use created wetlands, we lack a broad synthesis of these data. While some altered wetlands may provide vital habitat, others could pose a considerable risk to wildlife. This risk will be heightened if such wetlands are ecological traps - preferred habitats that confer lower fitness than another available habitat...
September 19, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28929448/acid-rock-drainage-in-nevado-pastoruri-glacier-area-huascar%C3%A3-n-national-park-per%C3%A3%C2%BA-hydrochemical-and-mineralogical-characterization-and-associated-environmental-implications
#6
Esther Santofimia, Enrique López-Pamo, Edwin Julio Palomino, Elena González-Toril, Ángeles Aguilera
The generation of acid rock drainage (ARD) was observed in an area of Nevado Pastoruri as a result of the oxidative dissolution of pyrite-rich lutites and sandstones. These ARDs are generated as abundant pyrite becomes exposed to atmospheric conditions as a result of glacier retreat. The proglacial zone contains lagoons, springs, streams and wetlands, scant vegetation, and intense fluvioglacial erosion. This work reports a comprehensive identification and the results of sampling of the lagoons and springs belonging to the microbasin, which is the headwaters of the Pachacoto River, as well as mapping results based on the hydrochemical data obtained in our study...
September 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28925537/continental-extent-patterns-in-amphibian-malformations-linked-to-parasites-chemical-contaminants-and-their-interactions
#7
Sarah E Haas, Mari K Reeves, Alfred E Pinkney, Pieter T J Johnson
Widespread observations of malformed amphibians across North America have generated both concern and controversy. Debates over the causes of such malformations-which can affect >50% of animals in a population-have continued, likely due to involvement of multiple causal factors. Here, we used a 13-year dataset encompassing 53,880 frogs and toads from 422 wetlands and 42 states in the conterminous USA to test hypotheses relating abnormalities and four categories of potential drivers: (1) chemical contaminants, (2) land use practices, (3) parasite infection, and (4) targeted interactions between parasites and pesticides...
September 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28923731/phosphorus-sorption-desorption-and-effects-of-temperature-ph-and-salinity-on-phosphorus-sorption-in-marsh-soils-from-coastal-wetlands-with-different-flooding-conditions
#8
Junhong Bai, Xiaofei Ye, Jia Jia, Guangliang Zhang, Qingqing Zhao, Baoshan Cui, Xinhui Liu
Wetland soils act as a sink or source of phosphorus (P) to the overlaying water due to phosphorus sorption-desorption processes. Litter information is available on sorption and desorption behaviors of phosphorus in coastal wetlands with different flooding conditions. Laboratory experiments were conducted to investigate phosphorus sorption-desorption processes, fractions of adsorbed phosphorus, and the effects of salinity, pH and temperature on phosphorus sorption on soils in tidal-flooding wetlands (TW), freshwater-flooding wetlands (FW) and seasonal-flooding wetlands (SW) in the Yellow River Delta...
August 24, 2017: Chemosphere
https://www.readbyqxmd.com/read/28922630/effects-of-iron-and-calcium-carbonate-on-contaminant-removal-efficiencies-and-microbial-communities-in-integrated-wastewater-treatment-systems
#9
Zhimiao Zhao, Xinshan Song, Yinjiang Zhang, Yufeng Zhao, Bodi Wang, Yuhui Wang
In the paper, we explored the influences of different dosages of iron and calcium carbonate on contaminant removal efficiencies and microbial communities in algal ponds combined with constructed wetlands. After 1-year operation of treatment systems, based on the high-throughput pyrosequencing analysis of microbial communities, the optimal operating conditions were obtained as follows: the ACW10 system with Fe(3+) (5.6 mg L(-1)), iron powder (2.8 mg L(-1)), and CaCO3 powder (0.2 mg L(-1)) in influent as the adjusting agents, initial phosphorus source (PO4(3-)) in influent, the ratio of nitrogen to phosphorus (N/P) of 30 in influent, and hydraulic retention time (HRT) of 1 day...
September 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28921305/allocation-of-metals-and-trace-elements-in-different-tissues-of-piscivorous-species-phalacrocorax-carbo
#10
Hribšek Irena, Jovičić Katarina, Karadžić Branko, Skorić Stefan
Great cormorants (Phalacrocorax carbo) are piscivorous birds, and as apex predators they accumulate high levels of contaminants from the aquatic ecosystems. In the present study, we analyzed distribution of Al, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sr, and Zn in ten tissues (muscle, liver, kidney, spleen, gizzard, heart, skin, lard, breast feathers, and remiges) of the Great cormorants in the Marin Sprud locality, the Danube River, Serbia. Concentrations of elements in tissues were assessed by using inductively coupled plasma optical spectrometry...
September 18, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28920832/salinifilum-gen-nov-with-description-of-salinifilum-proteinilyticum-sp-nov-an-extremely-halophilic-actinomycete-isolated-from-meighan-wetland-iran-and-reclassification-of-saccharopolyspora-aidingensis-as-salinifilum-aidingensis-comb-nov-and-saccharopolyspora
#11
Mahdi Moshtaghi Nikou, Mohaddaseh Ramezani, Sharareh Harirchi, Somayyeh Makzoom, Mohammad Ali Amoozegar, Seyed Abolhassan Shahzadeh Fazeli, Peter Schumann, Antonio Ventosa
A Gram-positive, halophilic actinobacterial strain Miq-12T was isolated from Meighan wetland in Iran. Strain Miq-12T was strictly aerobic, catalase positive and oxidase negative. The isolate grew at 12-25 % NaCl, at 30-50 °C and pH 5.5-10.5. The optimum NaCl, temperature and pH for growth were 15-20 %, 40 °C and 7.0-8.0, respectively. The cell wall of strain Miq-12T contained meso-diaminopimelic acid as diagnostic diamino acid and arabinose as whole-cell sugar. The polar lipid pattern consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine and phosphatidylinositol...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28918434/improved-dna-purification-with-quality-assurance-for-evaluation-of-the-microbial-genetic-content-of-constructed-wetlands
#12
Wenda Huang, Jingjing Guo, Ran Tao, Ying Man, Yunv Dai, Yang Yang
Efficient isolation of target DNA is a crucial first step of DNA-based metagenomic analyses of environmental samples. Insufficient quantity and purity of DNA isolated using commercial kits result in missing genetic information, especially for large-diameter substrates in constructed wetlands (CWs). Here, we addressed this problem by devising a cost-effective calcium chloride lysozyme-sodium dodecyl sulfate (SDS) method (CCLS), with key improvements in the steps of humic acid removal and cell lysis. The buffer comprising Tris, EDTA, Na2O2P7 and PVPP (TENP), and skim milk, could reduce adsorption between microorganisms and substrates, and calcium chloride precipitated and removed over 94% of humic acid...
September 16, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28918005/analysing-how-plants-in-coastal-wetlands-respond-to-varying-tidal-regimes-throughout-their-life-cycles
#13
Tian Xie, Baoshan Cui, Shanze Li
Important to conserve plant species in coastal wetlands throughout their life cycle. All life stages in these habitats are exposed to varying tidal cycles. It is necessary to investigate all life stages as to how they respond to varying tidal regimes. We examine three wetlands containing populations of an endangered halophyte species, each subjected to different tidal regimes: (1). wetlands completely closed to tidal cycles; (2). wetlands directly exposed to tidal cycles (3). wetlands exposed to a partially closed tidal regime...
September 13, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28915479/effect-of-design-and-operational-conditions-on-the-performance-of-subsurface-flow-treatment-wetlands-emerging-organic-contaminants-as-indicators
#14
Stefanie Kahl, Jaime Nivala, Manfred van Afferden, Roland A Müller, Thorsten Reemtsma
Six pilot-scale subsurface flow treatment wetlands loaded with primary treated municipal wastewater were monitored over one year for classical wastewater parameters and a set of emerging organic compounds (EOCs) serving as process indicators for biodegradation: caffeine, ibuprofen, naproxen, benzotriazole, diclofenac, acesulfame, and carbamazepine. The wetland technologies investigated included conventional horizontal flow, unsaturated vertical flow (single and two-stage), horizontal flow with aeration, vertical flow with aeration, and reciprocating...
September 5, 2017: Water Research
https://www.readbyqxmd.com/read/28913582/glyphosate-ab-sorption-by-shoots-and-rhizomes-of-native-versus-hybrid-cattail-typha
#15
Tianye Zheng, Nora B Sutton, Pim de Jager, Richard Grosshans, Sirajum Munira, Annemieke Farenhorst
Wetlands in the Prairie Pothole Region of North America are integrated with farmland and contain mixtures of herbicide contaminants. Passive nonfacilitated diffusion is how most herbicides can move across plant membranes, making this perhaps an important process by which herbicide contaminants are absorbed by wetland vegetation. Prairie wetlands are dominated by native cattail (Typha latifolia) and hybrid cattail (Typha x glauca). The objective of this batch equilibrium study was to compare glyphosate absorption by the shoots and rhizomes of native versus hybrid cattails...
September 14, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28910714/nitrogen-discharge-pathways-in-vegetable-production-as-non-point-sources-of-pollution-and-measures-to-control-it
#16
Ju Min, Weiming Shi
Discharge of nitrogen (N) from fertilizers applied to vegetables is becoming a serious environmental problem. In a field experiment involving a celery-tomato-fallow-lettuce rotation, leaching was the primary pathway of N loss (56.1±0.4% of the total), followed, in descending order, by runoff (11.7±0.3%), N2O emissions (1.6±0.1%), and volatilization of ammonia (0.5±0.1%). Decreasing the traditional dose of N by 40% in each growth season decreased N leaching by 22.3±4.5, 39.8±6.7, 40.3±2.9 and 27.4±3...
September 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28903177/changes-in-bacteria-composition-and-efficiency-of-constructed-wetlands-under-sustained-overloads-a-modeling-experiment
#17
F Boano, A Rizzo, R Samsó, J García, R Revelli, L Ridolfi
The average organic and hydraulic loads that Constructed Wetlands (CWs) receive are key parameters for their adequate long-term functioning. However, over their lifespan they will inevitably be subject to either episodic or sustained overloadings. Despite that the consequences of sustained overloading are well known (e.g., clogging), the threshold of overloads that these systems can tolerate is difficult to determine. Moreover, the mechanisms that might sustain the buffering capacity (i.e., the reduction of peaks in nutrient load) during overloads are not well understood...
September 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28902904/assessing-coastal-wetland-vulnerability-to-sea-level-rise-along-the-northern-gulf-of-mexico-coast-gaps-and-opportunities-for-developing-a-coordinated-regional-sampling-network
#18
Michael J Osland, Kereen T Griffith, Jack C Larriviere, Laura C Feher, Donald R Cahoon, Nicholas M Enwright, David A Oster, John M Tirpak, Mark S Woodrey, Renee C Collini, Joseph J Baustian, Joshua L Breithaupt, Julia A Cherry, Jeremy R Conrad, Nicole Cormier, Carlos A Coronado-Molina, Joseph F Donoghue, Sean A Graham, Jennifer W Harper, Mark W Hester, Rebecca J Howard, Ken W Krauss, Daniel E Kroes, Robert R Lane, Karen L McKee, Irving A Mendelssohn, Beth A Middleton, Jena A Moon, Sarai C Piazza, Nicole M Rankin, Fred H Sklar, Greg D Steyer, Kathleen M Swanson, Christopher M Swarzenski, William C Vervaeke, Jonathan M Willis, K Van Wilson
Coastal wetland responses to sea-level rise are greatly influenced by biogeomorphic processes that affect wetland surface elevation. Small changes in elevation relative to sea level can lead to comparatively large changes in ecosystem structure, function, and stability. The surface elevation table-marker horizon (SET-MH) approach is being used globally to quantify the relative contributions of processes affecting wetland elevation change. Historically, SET-MH measurements have been obtained at local scales to address site-specific research questions...
2017: PloS One
https://www.readbyqxmd.com/read/28901896/paludicola-psychrotolerans-gen-nov-sp-nov-a-novel-psychrotolerant-chitinolytic-anaerobe-of-the-family-ruminococcaceae
#19
Yan Li, Ling-Li Zhang, Lan Liu, Yong-Qiang Tian, Xiao-Feng Liu, Wen-Jun Li, Yu-Mei Dai
A psychrotolerant chitinolytic bacterium, designated NC1253T, was isolated from Zoige wetland on the Qinghai-Tibetan Plateau. This strain was a Gram-stain-positive, spore-forming and rod-shaped anaerobe. NC1253T grew at 4-35 °C, at pH 6.0-8.5 and could grow on chitin as the only carbon resource. Phylogenetic analysis, based on the 16S rRNA gene sequence, showed that strain NC1253T represented a novel bacterial genus within the family Ruminococcaceae. Strain NC1253T has less than 91.0 % similarity with other type strains, such as Harryflintia acetispora V20-281aT (90...
September 13, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28898833/bioelectricity-generation-contaminant-removal-and-bacterial-community-distribution-as-affected-by-substrate-material-size-and-aquatic-macrophyte-in-constructed-wetland-microbial-fuel-cell
#20
Junfeng Wang, Xinshan Song, Yuhui Wang, Junhong Bai, Heng Bai, Dengming Yan, Yin Cao, Yihao Li, Zhilei Yu, Guoqiang Dong
Integrating microbial fuel cell with constructed wetland (CW-MFC) is a novel way to harvest bioelectricity during wastewater treatment. In this study, the bioelectricity generation, containment removal and microbial community distribution in CW-MFC as affected by substrate material sizes and aquatic macrophyte were investigated. The planted CW-MFC with larger filler size showed a significant promotion of the relative abundance of electrochemically active bacteria (beta-Proteobacteria), which might result in the increase of bioelectricity generation in CW-MFC (8...
September 1, 2017: Bioresource Technology
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